Synergistic Effect Of Nanoparticles Research Articles

Nanotechnology in food packaging materials: role and application of nanoparticles.

Global concerns about food security, driven by rising demand, have prompted the exploration of nanotechnology as a solution to enhance food supply. This shift comes in response to the limitations of conventional technologies in meeting the ever-increasing demand for food products. Consequently, nanoparticles play a crucial role in enhancing food production, preservation, and extending shelf life by imparting exceptional properties to materials. Nanoparticles and nanostructures with attributes like expansive surface area and antimicrobial efficacy, are versatile in both traditional packaging and integration into biopolymer matrices. These distinctive qualities contribute to their extensive use in various food sector applications. Hence, this review explores the physicochemical properties, functions, and biological aspects of nanoparticles in the context of food packaging. Furthermore, the synergistic effect of nanoparticles with different biopolymers, alongside its different potential applications such as food shelf-life extenders, antimicrobial agents and as nanomaterials for developing smart packaging systems were summarily explored. While the ongoing exploration of this research area is evident, our review highlights the substantial potential of nanomaterials to emerge as a viable choice for food packaging if the challenges regarding toxicity are carefully and effectively modulated.

Recent Advances in Synergistic Effect of Nanoparticles and Its Biomedical Application.

The synergistic impact of nanomaterials is critical for novel intracellular and/or subcellular drug delivery systems of minimal toxicity. This synergism results in a fundamental bio/nano interface interaction, which is discussed in terms of nanoparticle translocation, outer wrapping, embedding, and interior cellular attachment. The morphology, size, surface area, ligand chemistry and charge of nanoparticles all play a role in translocation. In this review, we suggest a generalized mechanism to characterize the bio/nano interface, as we discuss the synergistic interaction between nanoparticles and cells, tissues, and other biological systems. Novel perceptions are reviewed regarding the ability of nanoparticles to improve hybrid nanocarriers with homogeneous structures to enhance multifunctional biomedical applications, such as bioimaging, tissue engineering, immunotherapy, and phototherapy.

Evaluation of the Antimicrobial, Cytotoxic, and Physical Properties of Selected Nano-Complexes in Bovine Udder Inflammatory Pathogen Control.

Mastitis in dairy cows is a worldwide problem faced by dairy producers. Treatment mainly involves antibiotic therapy, however, due to widespread antibiotic resistance among bacteria, such treatments are no longer effective. For this reason, scientists are searching for new solutions to combat mastitis, which is caused by bacteria, fungi, and algae. One of the most promising solutions, nanotechnology, is attracting research due to its biocidal properties. The purpose of this research was to determine the biocidal properties of nanocomposites as a potential alternative to antibiotics in the control of mastitis, as well as to determine whether the use of nanoparticles and what concentration is safe for the breeder and the animal. In this study, the effects of Ag, Au, Cu, Fe, and Pt nanoparticles and their complexes were evaluated in relation to the survival of bacteria and fungi isolated from cattle diagnosed with mastitis, their physicochemical properties, and their toxicity to bovine and human mammary epithelial cells BME-UV1 and HMEC (human microvascular endothelial cells). Moreover, E. coli, S. aureus, C. albicans, and Prototheca sp. invasion was assessed using the alginate bead (bioprinted) model. The NPs were tested at concentrations of 25, 12.5, 6.25, 3.125, 1.56 mg/l for Au, Ag, Cu and Fe NPs, and 10, 5, 2.5, 1.25, 0.625 mg/l for Pt. With the exception of Fe and Pt, all exhibited biocidal properties against isolates, while the AgCu complex had the best effect. In addition, nanoparticles showed synergistic effects, while the low concentrations had no toxic effect on BME-UV1 and HMEC cells. Synergistic effects of nanoparticles and no toxicity to bovine and human cells might, in the future, be an effective alternative in the fight against microorganisms responsible for mastitis, and the implementation of research results in practice would reduce the percentage of dairy cows suffering from mastitis. The problem of increasing antibiotic resistance is posing a global threat to human's and animal's health, and requires comprehensive research to evaluate the potential use of nanoparticles - especially their complexes - as well as to determine whether nanoparticles are safe for the breeders and the animals. The conducted series of studies allows further consideration of the use of the obtained results in practice, creating a potentially new alternative to antibiotics in the treatment and prevention of mastitis in dairy cattle.

Synergistic interaction of nanoparticles and probiotic delivery: A review.

Nanotechnology is an expanding and new technology that prompts production with nanoparticle-based (1-100 nm) organic and inorganic materials. Such a tool has an imperative function in different sectors like bioengineering, pharmaceuticals, electronics, energy, nuclear energy, and fuel, and its applications are helpful for human, animal, plant, and environmental health. In exacting, the nanoparticles are synthesized by top-down and bottom-up approaches through different techniques such as chemical, physical, and biological progress. The characterization is vital and the confirmation of nanoparticle traits is done by various instrumentation analyses like UV-Vis spectrophotometry (UV-Vis), Fourier transform infrared spectroscopy, scanning electron microscope, transmission electron microscopy, X-ray diffraction, atomic force microscopy, annular dark-field imaging, and intracranial pressure. In addition, probiotics are friendly microbes which while administered in sufficient quantity confer health advantages to the host. Characterization investigation is much more significant to the identification of good probiotics. Similarly, haemolytic activity, acid and bile salt tolerance, autoaggregation, antimicrobial compound production, inhibition of pathogens, enhance the immune system, and more health-beneficial effects on the host. The synergistic effects of nanoparticles and probiotics combined delivery applications are still limited to food, feed, and biomedical applications. However, the mechanisms by which they interact with the immune system and gut microbiota in humans and animals are largely unclear. This review discusses current research advancements to fulfil research gaps and promote the successful improvement of human and animal health.

Nanotechnology in food packaging materials: role and application of nanoparticles.

Global concerns about food security, driven by rising demand, have prompted the exploration of nanotechnology as a solution to enhance food supply. This shift comes in response to the limitations of conventional technologies in meeting the ever-increasing demand for food products. Consequently, nanoparticles play a crucial role in enhancing food production, preservation, and extending shelf life by imparting exceptional properties to materials. Nanoparticles and nanostructures with attributes like expansive surface area and antimicrobial efficacy, are versatile in both traditional packaging and integration into biopolymer matrices. These distinctive qualities contribute to their extensive use in various food sector applications. Hence, this review explores the physicochemical properties, functions, and biological aspects of nanoparticles in the context of food packaging. Furthermore, the synergistic effect of nanoparticles with different biopolymers, alongside its different potential applications such as food shelf-life extenders, antimicrobial agents and as nanomaterials for developing smart packaging systems were summarily explored. While the ongoing exploration of this research area is evident, our review highlights the substantial potential of nanomaterials to emerge as a viable choice for food packaging if the challenges regarding toxicity are carefully and effectively modulated.

Formation and stability of emulsion in the presence of nano particles in the modified smart aqueous phase: Effect of ultrasonic, salt, and surfactant

Synergistic effects of nanoparticles (NPs) and smart water flooding are new methods for enhanced oil recovery (EOR). One of the vital issues, in this case, is the formation and stability of emulsion. Therefore, investigating the role and performance of NPs and ions during the processes of EOR, which are based on smart water injection and natural reservoir production, is of significant importance. Previous studies have investigated various factors (i.e., compounds present in oil and water) that affect emulsion stability mainly at ambient temperatures. In this research, the effect of various factors, including the effect of surfactants, salts, and NPs, on the dynamics and thermodynamics of this phenomenon, has been studied through the visual analysis of emulsion droplets under high pressure (HP) and high-temperature (HT) conditions. Based on the results obtained from the experiments, the rate of formation and stability of emulsions increases by increasing the pressure, and after a certain pressure level, it decreases. On the other hand, in general, the rate of emulsion stability follows a decreasing trend by increasing the system temperature. Additionally, in this study, three salts, namely MgCl2, CaCl2, and NaCl, and two surfactants, AOS (alpha olefin sulfonate) and CTAB (cetrimonium bromide), were used. After finding the optimal weight percentage of these salts and surfactants in the formation and emulsion stability, they were combined with nanoparticles of silica oxide in different volume percentages, and the effect of these nanoparticles on the emulsion stability was investigated. The effect of ultrasonication on solutions containing NPs was also investigated from the point of view of emulsion formation and stability. Based on the results obtained, as the power consumption of the ultrasonic device increases to form an emulsion, the rate of rotation for its separation will also increase.

Boosting the tribological properties of PEG200 by a novel face-to-face FeOCl/Zn-MOF lubricant additive

The synergistic effect of nanoparticles can effectively improve the tribological performances of base oils. In this study, a novel lubricant additive by embedding 2D FeOCl on 2D Zn − MOF was reported for the first time in order to boost the tribological performances of polyethylene glycol (PEG200). The FeOCl/Zn − MOF prepared by a facile microwave assisted strategy was found to be a typical flower-like appearance, where FeOCl nanosheets decorated on the surface of Zn − MOF sheets. Owing to the electron transfer and synergistic effect between FeOCl and Zn − MOF, the novel FeOCl/Zn − MOF effectively reduced the coefficient of friction by 48 % and wear scar diameter by 88 % at the loading of 0.4 wt% FeOCl/Zn − MOF in the base oil. The work suggests the face-to-face combination of FeOCl and Zn − MOF for enhanced tribological performances, representing a new strategy to prepare efficient lubricant additives using assembled 2D nanomaterials.

Attenuation properties of hybrid nanocomposite film containing Ce2O, GO, and α-Al2O3 nanoparticles for high energy radiations

The use of diagnostic radiation in medical centers has spread due to the incidence of various diseases. Thus, it is essential that patients and medical staff wear protective clothing to protect themselves from their harmful effects. In the past, lead protective clothing has been used; however, the toxicity and heaviness of lead have limited the tendency to use these clothing. Recently, nanocomposites containing heavy element nanoparticles have been introduced as an alternative to lead coatings. In this study, hybrid nanocomposites containing ceria (CeO2), alumina (Al2O3), and graphene oxide (GO) nanoparticles were studied for this purpose. Ceria, alumina, and graphene oxide nanoparticles were mixed with polyethylenevinylacetate (EVA) dissolved in chloroform and casted on a glass plate to form nanocomposite films. The prepared nanoparticles and films were characterized by Fourier Transform Infrared Spectroscopy, Field Emission Scanning Electron Microscope, Thermal Gravimetric Analysis, and Energy Dispersive X-ray Analysis, and then the attenuation properties of the films against high-energy radiation (120 kV) were studied in two narrow and broad beam geometries. The results showed that hybrid films, despite having a lower percentage of nanoparticles, showed better attenuation properties, which indicated the synergistic effect of nanoparticles with different mechanisms in attenuating the radiations. The attenuation ability of these films was considerable due to their lower density compared to lead. The fabricated hybrid nanocomposite films with a suitable performance in attenuation of high-energy radiations used in therapeutic diagnostics, can be proposed as a suitable alternative to conventional lead clothing.

Synergistic Effect of Nanoparticles: Enhanced Mechanical and Corrosion Protection Properties of Epoxy Coatings Incorporated with SiO2 and ZrO2.

This research paper presents the fabrication of epoxy coatings along with the hybrid combination of SiO2 and ZrO2. The epoxy resin is incorporated with SiO2 as the primary pigment and ZrO2 as the synergist pigment. The study delves into the adhesion, barrier, and anti-corrosion properties of these coatings, enriched with silica and zirconium nanoparticles, and investigates their impact on the final properties of the epoxy coating. The epoxy resin, a Diglycidyl ether bisphenol-A (DGEBA) type, is cured with a polyamidoamine adduct-based curing agent. To evaluate the protective performance of silica SiO2 and zirconia ZrO2 nanoparticles in epoxy coatings, the coated samples were tested in a 3.5% NaCl solution. The experimental results clearly demonstrate a remarkable improvement in the ultimate tensile strength (UTS), yield strength (YS), and Elastic Modulus. In comparison to using SiO2 separately, the incorporation of both ZrO2 and SiO2 resulted in a substantial increase of 43.5% in UTS, 74.2% in YS, and 8.2% in Elastic Modulus. The corrosion test results revealed that the combination of DGEBA, SiO2, and ZrO2 significantly enhanced the anti-corrosion efficiency of the organic coatings. Both these pigments exhibited superior anti-corrosion effects and mechanical properties compared to conventional epoxy coatings, leading to a substantial increase in the anti-corrosion efficiency of the developed coating. This research focuses the potential of SiO2 and ZrO2 in hybrid combination for applications, where mechanical, corrosion and higher adhesion to the substrates are of prime importance.

Fabrication and research of superhydrophobic paper for oil-water separation

In this work, we developed a facile and effective strategy to fabricate superhydrophobic paper based on micro-nano structure by the synergistic effect of nanoparticles and microporous made by breath figure method, which realized the in-situ self-assembly and integration of amphiphilic copolymer of Poly(St-co-HEMA), nano silica particles (SiO2) and polydimethylsiloxane (PDMS). Furthermore, the chemical composition of copolymer, surface morphology and wettability were well characterized by FTIR, 1HNMR, GPC, SEM and water contact angle measurements, respectively. The molar ratio of St to HEMA reached 15:1 and the concentrations of SiO2 achieved 15 mg/ml were identified to be the most effective system, which possessed outstanding water repellency with a CA of 165° and a SA of 2° and good self-cleaning ability. Besides, the as-prepared paper maintained the repellency to water under extreme conditions, including low-high temperature, strong acidic or alkaline solutions, ultrasonic treatment and cyclic sandpaper abrasion. Importantly, the superhydrophobicity paper could be utilized as effective functional nanomaterials for the separation of water-oil mixture with efficiency above 90% and repeatable for at least 20 times.

Effects of aging treatment on microstructure and mechanical properties of non-equiatomic high entropy alloy

In this study, the cryogenically-processed FeCoNi1.5CuB0.5Y0.2 HEAs (high-entropy alloys) were subjected to aging treatment, such as different aging temperatures T (unaged sample, 700 °C, 750 °C, 800 °C), aging times t (unaged sample, 10 h, 12 h, 14 h) and the aging cycles N (unaged sample, one time, two times, three times). Under this condition, the changing laws of microstructure and mechanical properties of HEAs were explored. According to the experiment, with the increase of the aging temperature, the prolongation of the aging time or the growth of the number of aging cycles, the overall mechanical properties of the material have been significantly improved. In particular, when the aging conditions were T = 750 °C, t = 12 h, and N = 2 times, the grain size of the optimized sample was reduced, and a large number of finely dispersed precipitates appeared, which can produce excellent strong-plastic synergy. Further analysis revealed that the complex interacting multi-component in the HEA constitute the heterogeneity level of the microstructure and also lead to effective multi-component strengthening. Especially in the samples after optimized aging parameters (DCAT 7), the activated back stress at boundaries of grains and the synergistic effect of nanoparticles and twins contribute to high strain hardening. In terms of micromechanical characteristics, the modulus of elasticity and nanohardness of each phase were obviously enhanced. In terms of macroscopic mechanical properties, Vickers hardness, compressive strength and maximum compression ratio also reached their maximum values, which were 53.4%, 19.6% and 43.5% higher than those of the single cryogenic sample, separately. Obviously, the overall strength-ductility has been improved simultaneously.

Multilayer-structured carbon fiber fabric/graphene oxide/Fe3O4/epoxy composite for highly efficient mechanical and electromagnetic interference shielding

Nowadays, it is quite difficult to develop a facile, efficient, and easy large-scale production method to obtain the composite that can maintain a balance of Electromagnetic interference (EMI) shielding properties and mechanical properties. Herein, this work adopted the technology of electrohydrodynamic atomization deposition (EHDAD), layer-by-layer (LbL) assembly and heat-pressing to prepare carbon fiber fabric/graphene oxide/Fe3O4/epoxy (CFf/GO/Fe3O4/epoxy) composite. The research results show that the CFf/GO/Fe3O4/epoxy composite can maintain a good balance between mechanical and EMI performance. More specifically, the tensile strength of CFf/GO/Fe3O4/epoxy-4 composite can reach 565.1 MPa, which is higher than that of other composites reported previously. This can be attributed to the synergistic effect of covalent bonds and van der Waals forces improved the mechanical properties of the composite. Benefitting from the unique multi-layer structure and the synergistic effect of nanoparticles, the EMI shielding performance of CFf/GO/Fe3O4/epoxy composite can reach a maximum of 32.9 dB. The improvement of the EMI properties of composite was mainly attributed to the dielectric loss and magnetic loss. Surprisingly, the composite has excellent mechanical stability and EMI shielding stability even after long periods of storage. It is believed that this work opens up more possibilities to provide EMI shielding materials with outstanding mechanical properties.

Synergistic effect of nanoparticles and super absorbent polymer on self-healing ability of cement pastes

This paper analyzed the co-effects of super absorbent polymer (SAP) and nanomaterials such as silver nanoparticles (AgNPs), graphene oxide (GO) and multiwall carbon nanotubes (MWCNT) in cement pastes. While the SAP cement pastes provided a 25.23% higher 90/28-day compressive strength rate compared to the control sample, the MWCNT- and GO-added-SAP pastes provided a 37.84% and 74.77% higher rate, respectively. GO and MWCNTs increased the 90/28-day ultrasonic pulse velocity rates of SAP cement pastes by 1.25 and 1.38 times, respectively. The cracks initially formed by plastic shrinkage were completely closed with the H-bond ability of MWCNT and GO.

Experimental investigation of silica nanoparticle assisted Surfactant and polymer systems for enhanced oil recovery

Enhanced oil recovery techniques are commonly used today in oil fields to boost oil production. The objective of the present study is to investigate the use of silica nanoparticles (NPs) with surfactants and polymers to increase the oil recovery from oil fields. Synergistic effects of surfactant, polymer, and nanoparticles on interfacial tension (IFT) reduction, wettability alteration, emulsification, and viscosity improvement are reported in this study. Core flooding experiments were performed in cores with different permeabilities to screen the reservoir on basis of rock properties. The dispersion of NPs in the aqueous solution of surfactant and polymer was characterized by stability analysis, Turbiscan analysis, dynamic light scattering (DLS), and zeta-potential measurements. The nanoparticles were able to further reduce the IFT between the surfactant solution and crude oil. The stability of nanofluids was increased when surfactant was added as evidenced by a higher zeta potential value (−39.6 mV). The addition of polymer led to even higher stability of the nanofluids as observed by the Turbiscan analyzer. A synergistic effect of NPs, surfactant, and polymer was observed in the core flooding experiments. The nanofluid system provided higher incremental oil recovery in high permeability core as compared to low permeability core. Different recovery mechanisms responsible for oil recovery by nanofluids like wettability alteration, disjoining pressure, log jamming, and pore channel plugging phenomena are discussed. The flooding results indicate that the injection of the designed slug increases the oil recovery up to 28% of the original oil in place after conventional water flooding. Therefore, the findings of this study can help for a better understanding of the use of silica NPs with surfactant and polymer as a chemical EOR agent. The result also helps in the screening of sandstone reservoirs where nanofluid could be employed.

Synergism between lipophilic surfactant and lipophilic SiO2 nanoparticles enhances self-emulsification performance

Water control technology for high-temperature and -salinity gas wells is immature, and there is a lack of effective water control methods for condensate gas reservoirs and horizontal wells. Water control can be achieved by conducting subsurface self-emulsification to generate nanoparticle emulsions (Pickering emulsions). While this has been tested in oilfields, the overall success rate is low. Elucidating the mechanism of nanoparticle and surfactant synergy would help to improve the success rate of using self-emulsifying water-in-oil (W/O) Pickering emulsions for water control in gas wells. In this study, a self-emulsification process was simulated based on the formation conditions of the Tahe gas well using an active oil (diesel containing 1 wt% non-ionic surfactant) containing various concentrations of nanoparticles. By measuring the droplet size, viscosity, viscoelasticity and high-temperature stability of the emulsion, and in combination with previous research results, the synergistic effects of nanoparticles and surfactant on the generation and stability of emulsions were clarified. Finally, we explored the conditions under which synergy at the oil-water interface occurs and whether the nanoparticle surfaces were secondarily modified under formation conditions. The strength of the synergistic effect in the self-emulsifying system was found to be strongest at a 1:1 nanoparticle-to-surfactant concentration ratio. The strength of the synergistic effect was proportional to the emulsion's volume, droplet size, viscosity, viscoelasticity and other properties. The most synergistic self-emulsifying emulsion had up to five times the volume of emulsions made at other oil-to-water ratios. The emulsion droplet size showed a bimodal distribution, with mean particle sizes of 3 μm and 100 μm, respectively. The viscosity of the emulsion generated at 80 °C reached 2000 mPa s−1 at room temperature (26 °C) and increased to 2500 mPa s−1 as the temperature increased to 80 °C. Viscoelastic tests at 80 °C show that the emulsion generated at a concentration ratio of 1:1 exhibited the greatest and most stable elastic properties and that agglomerations of emulsion plugging pore throats were not easily penetrated by subsurface fluids. At this point, the nanoparticles were uniformly distributed at the droplet interface and the particle surfaces remained unchanged. The mechanism by which the synergistic effect stabilizes the emulsion changed at high temperatures (140 °C). The nanoparticles at the interface were wrapped in a thick oil film of high viscosity, like the inner phase of an emulsion. Then, concave high-viscosity oil-phase channels were formed between the ‘emulsified-like nanoparticles’. This change at the oil-water interface ensured the stability of the W/O emulsion at high temperatures. The synergy between the surfactant and nanoparticles was primarily based on the formation of an emulsion at the oil-water interface by the surfactant, followed by the gradual adsorption of nanoparticles at the interface, which enhanced the emulsion properties. The nanoparticle interface did not undergo secondary modification under formation conditions, and the synergistic effect of the surfactant and nanoparticles remained dominated by electrostatic forces.

Effect of nanoencapsulation of blueberry (Vaccinium myrtillus): A green source of flavonoids with antioxidant and photoprotective properties

The effect of nanoencapsulation on the in vitro photoprotection and antioxidant properties of blueberry (Vaccinium myrtillus) extract, before and after their dispersion into an oil-in-water emulsion and its final stability under stress conditions. Besides its skin healing activity, chitosan was chosen as wall material due to its natural origin, and possibility of obtention from shrimp residues. Chitosan/tripolyphosphate (TPP) nanoparticles loaded with blueberry extract were produced and characterized. Three different semi-solid oil-in-water emulsions, using Ecocert certified materials, were developed containing, respectively, (i) 5% (wt/wt) of extract-free nanoparticles, (ii) 5% (wt/wt) of extract-loaded nanoparticles, (iii) 2% (wt/wt) of free extract. Sun protection factor (SPF), antioxidant activity and stability under stress conditions were evaluated. The concentration of rutin was determined by High Performance Liquid Chromatography (HPLC). The loading of blueberry extract into nanoparticles kept their physicochemical properties, as well as SPF and antioxidant activity, over the course of the stability study. Extract-loaded nanoparticles were dispersed in a semi-solid oil-in-water emulsion and were shown to protect the extract from oxidation, suggesting that formulation containing 5% (wt/wt) of extract-free nanoparticles could presented lower difference between initial and final SPF and antioxidant activity values after 90 days of analysis. The developed formulation is proposed as a greener potential formulation to be used as photoprotector, especially if associated with physical sun filters. The role of blueberry flavonoids and the synergistic effect of nanoparticles against skin aging are here discussed.

Study on a Nonionic Surfactant/Nanoparticle Composite Flooding System for Enhanced Oil Recovery.

The composite flooding system composed of a surfactant and nanoparticles has shown great application potential in enhancing oil recovery. However, at present, these research studies are mainly focused on anionic surfactants. Relatively speaking, alkanolamide (CDEA), a nonionic surfactant, has the characteristics of a small adsorption amount on the rock surface, no cloud point, good temperature resistance, and good salt resistance. However, to the best of our best knowledge, there is no research report on the composite flooding system composed of CDEA and nanoparticles. Therefore, the surfactant/nanoparticle (S/NP) flooding system based on CDEA and nano-SiO2 was studied in this paper. The S/NP flooding system (0.1% CDEA + 0.05% SiO2) was constructed based on the performance in reducing the oil–water interfacial tension (IFT) and the stability of the composite system. The IFT between the S/NP flooding system and the crude oil can reach ultra-low values (3 × 10–3 mN/m), and there is no obvious sedimentation within 72 h. The sandpack flood tests show that the oil recovery rate is increased by 16.8% compared with water flooding and finally reaches 58.2%. Based on micromodel flooding tests, the mechanisms of the S/NP flooding system are studied as follows: the synergistic effect of nanoparticles and surfactants can re-enforce its oil–water interface performance and improve the oil displacement efficiency and the Jamin effect of emulsified oil droplets, combined with the thickening property and retention plugging of nanoparticles, improves the sweep efficiency. As the surfactant and nanoparticle used in this study are commercially available industrial products, the research results have important guiding significance for promoting the industrial application of surfactant/nanoparticle composite flooding technology.

High-performance Mn3O4 nanomaterials synthesized via a new two-step hydrothermal method in asymmetric supercapacitors

In this work, specific morphology of Mn 3 O 4 supercapacitor electrode material was synthesized in a fast, efficient, and mass-produced two-step hydrothermal method. 20–30 nm Mn 3 O 4 particles were successfully anchored on 500–600 nm Mn 3 O 4 nanorods. The products were tested by XRD, XPS, SEM, TEM, CV, EDS, EIS, and galvanostatic charge/discharge to prove that the material exhibits good electrochemical performance. At a current density of 0.5 A/g, its specific capacitance could reach 233.41 F/g. This could maintain 10,000 cycles galvanostatic charge/discharge with 108.4% retention. When the current density was 0.5 A/g, the power density of the electrode material was 250 W kg −1 and the energy density was 32.42 W h kg −1 . The synergistic effect of nanoparticles and nanorods enhance the electroactive sites of material and increase the energy storage and specific capacitive. • Mn 3 O 4 nanometer electrode material was synthesized in a fast, efficient, and mass-produced two-step hydrothermal method. • At a current density of 0.5 A/g, its specific capacitance could reach 233.41 F/g. • The synergistic effect of nanoparticles and nanorods enhances the electrochemical performance of the material. • This could maintain 10,000 cycles galvanostatic charge/discharge with 108.4% retention.

Synergistic Effect of Nanoparticles and Polymers on the Rheological Properties of Injection Fluids: Implications for Enhanced Oil Recovery

New nanotechnology-based approaches are increasingly being investigated for enhanced oil recovery (EOR), with a particular focus on heavy oil reservoirs. Typically, the addition of a polymer to an ...

Hydrophobic Silica nanoparticle & Anionic/ Cationic surfactants interplays tailored interfacial properties for the wettability alteration and EOR applications

AbstractIn this study, the effect of anionic and cationic surfactant solutions alone and in combination with silica AEROSIL® R 816 nanomaterial on the wettability alteration of carbonate rock reservoir has been investigated. The nanofluid properties including stability, surfactant critical micelle concentration (CMC), Interfacial tension (IFT), and surfactant adsorption were studied that in each case, the synergistic effect of nanoparticles as adjacent particles along with surfactant molecules in the solution with respect to electrostatic and capillary forces has been discussed. The results show that nanoparticles generally reduce ST, CMC, surfactant adsorption on the rock, and surfactant molecules significantly increase the stability of nanoparticles. Also, contact angle test results indicated an increase in the effect of the wettability alteration of stones in the surfactant solution by the nanoparticles from the lipophilic to the hydrophilic, and the nanopowder solution itself had the most ability to change the wettability. Finally, the results from the observations as mentioned above were confirmed by performing imbibition test based on drop experiments.