Peeling Off Research Articles

Hybrid Binder Chemistry with Hydrogen-Bond Helix for High-Voltage Cathode of Sodium-Ion Batteries.

Since sodium-ion batteries (SIBs) have become increasingly commercialized in recent years, Na3V2(PO4)2O2F (NVPOF) offers promising economic potential as a cathode for SIBs because of its high operating voltage and energy density. According to reports, NVPOF performs poorly in normal commercial poly(vinylidene fluoride) (PVDF) binder systems and performs best in combination with aqueous binder. Although in line with the concept of green and sustainable development for future electrode preparation, aqueous binders are challenging to achieve high active material loadings at the electrode level, and their relatively high surface tension tends to cause the active material on the electrode sheet to crack or even peel off from the collector. Herein, a cross-linkable and easily commercial hybrid binder constructed by intermolecular hydrogen bonding (named HPP) has been developed and utilized in an NVPOF system, which enables the generation of a stable cathode electrolyte interphase on the surface of active materials. According to theoretical simulations, the HPP binder enhances electronic/ionic conductivity, which greatly lowers the energy barrier for Na+ migration. Additionally, the strong hydrogen-bond interactions between the HPP binder and NVPOF effectively prevent electrolyte corrosion and transition-metal dissolution, lessen the lattice volume effect, and ensure structural stability during cycling. The HPP-based NVPOF offers considerably improved rate capability and cycling performance, benefiting from these benefits. This comprehensive binder can be extended to the development of next-generation energy storage technologies with superior performance.

Evaluation of Three Common Green Building Materials Using ELECTRE Method

This research paper examines various options for replacing halogenated flame retardants with non-halogenated green construction material choices. Cellulosic construction materials like bamboo do not form compounds with conventional flame retardants. Due to a number of circumstances, including the minimal effectiveness of the flame-retardant activity, they may thus be an unnecessary component of the substrate and simply peel off. Utilizing an additive that comes into direct contact with at least one component of the "green building material" will provide long-lasting flame retardancy since the flame retardant will become a structurally integral element of the substrate. The response mechanisms of various treatment approaches are also discussed in this research to ensure that non-halogenated flame retardants effectively protect sustainable building materials like wood and bamboo. This paper demonstrates how various ELECTRE approaches may be used to choose effective tactics that take into account both technical and human behavioral barriers using a typical case study inside an organization. The impact of impedance from each system subsystem is investigated to assure the dependability of the selected method. When employee participation is a deciding element in the multidimensional strategic planning problem, a comparison of a range of compensated and non-compensatory models reveals that the models may produce less. Resistance strategies; However, ELECTRE shows very reasonable sensitivity. The alternatives are Gladstone, Port Augusta, Collie and Tarong. the evaluation parameters are Construction cost, Procurement cost, Waste reduction, GHG emissions, Cement replacement and Self-consolidating. The Final Result of Net superior value and rank the Gladstone is in fourth rank, The Port Augusta is in second rank, The Collie is in third rank, The Tarong is in first rank of the Net Inferior Value and Rank the Tarong is in fourth rank, The Gladstone is in first rank, The Port Augusta is in Second rank, The Collie is in third rank.

In-situ grown nickel iron bimetal organic frameworks from activated Ni foam for efficient energy storage and electrocatalysis: Study of metal ratio and nickel precursor effects

Ex-situ fabrication of electroactive electrodes encounters serious peeling off problems. Nickel foam (NF) shows promise as conductive substrate of electroactive electrodes due to high surface area, porosity and conductivity. To broaden NF applications and enhance attachments, applying in-situ growth for establishing efficient active materials on NF is necessary. In this study, nickel iron bimetal organic frameworks (NiFeMOF) are firstly synthesized from activated NF as electroactive electrodes for energy storage and electrocatalysis. Metal ratio and nickel precursor effects are studied to elucidate growing mechanism of electroactive materials. The optimal NiFeMOF/NF presents the highest specific capacitance (CF) of 2017.9 F/g at 20 mV/s, while MOF/NF electrodes prepared with only Ni and Fe respectively show smaller CF values of 622.1 and 1121.8 F/g. The superior electrocatalytic ability is achieved by NiFeMOF/NF. Inclusion of additional Ni salts is necessary for synthesizing Ni-MOF on NF with improved energy storage ability, but that prepared without addition of Ni salt exhibits better electrocatalytic ability. Trade-off between electrochemical surface area and electrical conductivity is proved as crucial factor in designing electroactive materials for energy storage and electrocatalytic water splitting. This study brings novel insights into establishment of effective electroactive materials for electrochemical systems using simple concepts and techniques.

Silver nanoparticles decorated polydopamine-coated pure silica zeolite as an efficient nanocatalyst for organic pollutants removal

An efficient catalyst, composed of silver-decorated polydopamine coatings on pure silicon zeolite (PSZN/PDA/Ag), capable of removing organic pollutants in water effectively, was synthesized using an economical in-situ reduction approach. The polydopamine (PDA) coating facilitates the stable dispersion of silver (Ag) nanoparticles and offers numerous catalytic active sites. This can be attributed to the ability of PDA in acting as a redox medium, via the interchange between its catechol group and the benzoquinone structure, thereby decreasing impediments to electron transfer among reactants, and consequently promoting the catalytic reaction. The porous structure of PSZN aids in embedding the PDA elements inside the pores, preventing the coating from peeling off and providing additional adsorption to transport reactants to the catalytic center for cooperative catalysis. Leveraging these properties, it demonstrates excellent efficiency and reusability in the catalytic reduction of waste methylene blue (MB) and 4-nitrophenol (4-NP), achieving reaction rates of 41.23 × 10-2 min−1 across five cycles respectively, with a minimum average conversion rate of 96 %. Moreover, the impressive performance is primarily due to the significant load (wt = 30.7 %) and small size (11.85 nm) of Ag nanoparticles, which boast a large number of reaction centers.

Irritation Test and Effectiveness of Facial Humidity Skin from Peel Off Gel Mask Based of Date Palm Seeds Powder (Phoenix dactylifera)

Irritation Test and Effectiveness of Facial Humidity Skin from Peel Off Gel Mask Based of Date Palm Seeds Powder (Phoenix dactylifera)

Revealing the Na storage behavior of graphite anodes in low-concentration imidazole-based electrolytes.

The thermodynamic instability of Na+-intercalated compounds is an important factor limiting the application of graphite anodes in sodium-ion batteries. Although solvent co-intercalation is recognized as a simple and effective strategy, the challenge lies in the lack of durable electrolytes. Herein, we successfully apply low-concentration imidazole-based electrolytes to graphite anodes for sodium-ion batteries. Specifically, low concentrations ensure high ionic conductivity while saving on costs. Methylimidazole molecules can be co-intercalated with Na+, and a small amount of unreleased solvated Na+ serves the dual purpose of providing support to the graphite layer and preventing peeling off. The interphase formed in imidazole is more uniform and dense compared with that in ether electrolytes, which reduces side reactions and the risk of internal short circuits. The obtained battery demonstrates a long cycle life of 1800 cycles with a capacity retention of 84.6%. This success extends to other imidazole-based solvents such as 1-propylimidazole and 1-butylimidazole.

Research on the Proportion and Strength of Joint Filler Materials for External Wall Tiles

Tile is the main exterior material of reinforced concrete building in Taiwan. However, the tiles are peeled off due to the deterioration of the building or the force of the earthquake recently. The construction sequence of exterior wall tiles includes cement mortar, waterproof layer, adhesive layer, paste tile and caulk. Most of tiles peel off from the adhesive layer so there are many studies focusing on the construction of adhesive layers. If the adhesive is not applied during construction or deteriorates over the years, it will lose its adhesion, and the caulk plays an important role in fixing the tile to the wall. Therefore, it is necessary to study the joint filling of exterior wall tiles. In this study, the exterior wall construction problems are sorted out, workers often ignore the proper water-cement ratio due to rush work in the construction site. The purpose of this study is to verify the effect of the water-cement ratio of the tile joint filler on the strength by pull-off and shear experiments. Set the water-cement ratio of joint filler to 1:4, 1:2, 1:1.3, 1:1, and quantitatively use in the same area. The results showed that the caulk with a water-cement ratio of 1:4 showed the best pull-off strength, which is 4.5 times that of 1:2. The increase in water volume at the construction site due to rush would lead to a significant decrease in strength. We look forward to providing a reference for on-site construction in this study.

Microstructure and ablation behavior of TiAl alloy with in-situ HfSi2-HfO2-SiO2 nanocomposite ceramic coating by LPDS technique

In this study, a HfSi2-HfO2-SiO2 nanocomposite coating is prepared on a TiAl alloy via a one-step liquid plasma-assisted particle deposition and sintering (LPDS) method to enhance its ablation resistance. For comparison, a conventional plasma electrolytic oxidation (PEO) coating is fabricated on the substrate. The phase composition, microstructure, and elemental distribution of the coatings are investigated via scanning electron microscopy, X-ray diffraction, and transmission electron microscopy. Moreover, the ablative resistance of the coated samples under flame (> 1500 °C) ablation is evaluated using a methyl acetylene polypropylene gas spray gun. The results show that numerous HfSi2 particles are incorporated into the coating with partial oxidation to HfO2 during the LPDS, thus resulting in a larger thickness by approximately eight folds compared with the thickness of the PEO coating. After ablation for 360 s, 15.4 % of the PEO coating peeled off, whereas no exfoliation occurred on the HfSi2-HfO2-SiO2 nanocomposite coating. The nanocomposite coating exhibits the smallest thickness after ablation. The superior high-temperature ablation resistance of the nanocomposite coating is primarily attributed to the presence of an oxygen-consuming HfSi2 phase. Furthermore, the formation of HfO2 during high-temperature ablation effectively anchors the ceramic coating, thereby impeding crack propagation and hindering oxygen diffusion. Hence, LPDS is a prominent strategy for the design and fabrication of multifunctional ceramic coatings that incorporate various functional particles, which can enhance the thermal protection of alloy substrates.

Corn cob usage as activated carbon using KOH as activator

The value of agroindustry waste like corn cob can be added as raw material for produced activated carbon. Activated carbon can be used as adsorbent in food, pharmacy, cosmetic industries, and waste water treatment. This research was conducted by using KOH as activator in the activation process for produced of activated carbon from corn cob. The methods include several steps, first step was particle size reduction. Second step was carbonization process in 500° C for an hour. Third step was activation process using solid KOH and liquid KOH, then heated at 900° C. Then, it will be washed until neutral and dried at 105° C. The activated carbon was observed for iodine adsorption, surface area, carbon content and morphology. The result for activation process using solid KOH: optimum iodine adsorption, optimum surface area, and optimum carbon content were 1233.87 mg/g, 2076.141 m2/g, and 93.59 %, respectively. Activation process using liquid KOH: optimum iodine adsorption, optimum surface area, and optimum carbon content were 595.16 mg/g, 716.271 m2/g, and 95.24 %, respectively. The morphology of activated carbon using solid KOH was cleaner and more open (porous). The Activated carbon can be applied for skin care product, like gel peel off mask.

Preparation and ablation behavior of a ZrB2-SiC coating-matrix integrated C/C composite

The preparation of a ZrB2-SiC coating-matrix integrated C/C composite was achieved by a slurry method and precursor infiltration and pyrolysis. The obtained composites consisted of a SiC outer layer, a ZrB2-SiC inner layer and a C/C-ZrB2-SiC substrate. Compared with a composite without the ZrB2-SiC layer, the mass ablation rates of the composite were reduced by 14.8 %, 12.0 %, and 19.4 %, and the linear ablation rates were reduced by 41.3 %, 28.2 %, and 14 %, respectively, after ablation under an oxyacetylene flame with a heat flux of 4.18 MW/m2 for 60 s, 120 s, and 300 s. During the ablation process, the SiC outer layer played a role in reducing the heating rate and surface temperature and promoting the sintering of ZrO2 so that the oxide layer avoided peeling off under large thermal stress. The ZrB2-SiC inner layer acted as an oxygen, heat and flow barrier, reducing the oxidation rate of the substrate.

Covalent graphene-diamond heterostructure coating on tool surface with enhanced lubricity and anti-wear performance

Graphene possesses extraordinary mechanical strength while it is difficult to integrate graphene layers on macroscale mechanical components due to the weak adhesion strength. In this work, we integrated a top layer of graphene sheets on the diamond-coated tool through in-situ growth of graphene on the diamond grains. With the aid of liquid metal catalyst, ultrastrong C–C covalent bonds are formed in the graphene-diamond interface, which can radically eliminate the peeling off of graphene sheets due to the insufficient adhesion strength. Cutting tests revealed that this top-layer graphene can substantially reduce cutting force and tool flank wear when cutting high-silicon aluminum alloy, with the reduction respectively reaching 40 % and 20 %. During the machining process, the graphene sheets are flattened and they gradually form a compact layer covering on the diamond surface, which can not only lubricate the tool surface but also protect the diamond from wear with the ultrahigh intrinsic strength. Further cutting experiments demonstrated that the effectiveness of the graphene sheets can sustain over 3600 m of cutting distance. The achievement in this work provides a novel insight into the integration of covalent graphene-diamond heterostructures in mechanical systems/devices with outstanding macroscale lubricity and anti-wear performance.

Feasibility and efficacy of a novel 6 french sheathless guiding catheter equipped with peel-off type external dilator for PCI with distal radial approach - a Japanese multicenter study

Abstract Introduction Recently, distal radial access has emerged as a promising alternative access to minimize access site complications. Objectives The aim of this study was to evaluate feasibility and efficacy of a novel 6-Fr sheathless guiding catheter system equipped with peel off type outer dilator for the patients who underwent percutaneous coronary intervention through distal radial artery. Methods Between Oct 2018 and January 2023, a total of 168 patients including 27 patients with ST elevation myocardial infarction underwent percutaneous coronary intervention using a 6-Fr novel sheathless guiding catheter in 2 Japanese hospitals with distal radial approach. The guiding catheter system include a 6-Fr guiding catheter and an inner and outer (peel-off type)dilater to prevent potential vascular damage during passage of the tip of the catheter. After puncture of the distal radial artery with 22 gause needle, a 0.025 inch guidewire with 220 cm length was inserted. Then, a seathless guiding catheter system equipped with both inner and outer sheath was advanced through skin surface for dilatation of puncture point. After peeling off the outer sheath, the catheter with inner sheath was advanced. Hemostatic method complies compression with a hemostatic pad and elastic bandage for 3 hours. Procedural success, bleeding complication and radial occlusion examined using Doppler ultrasound at discharge was accessed. Results Mean age of the patients was 72.1 ± 11.3 years old and 114 patients were male. Procedural success was 100 % with no patient requiring conversion to conventional radial access. The culprit lesion was located in the right coronary artery in 45 patients, the left anterior descending artery in 86 patients, the left circumflex artery in 21 patients, and the left main trunk in 12 patients. Doppler ultrasound examination of the distal radial artery at 1-day follow-up was available in all patients, with 2 patients (1.2%) was found to have radial artery occlusion. One patient (0.6%) presented forearm hematoma equivalent to EASY hematoma classification I and 4 patients (2.4%) showed dorsum hematoma. Conclusions The current study demonstrated that the use of a novel sheathless guiding catheter with outer dilator for distal radial approach in PCI was feasible and may contribute further reduction of procedure-related complications.peel-off type outer dilaterinsertion procedure

A self-assembled hydrogel dressing as multi-target therapeutics to promote wound healing

Wound healing is one of the major challenges in biomedicine owing to the absence of ideal wound dressings which can integrate easy absorption, satisfied injectability, rapid self-healing property, and multiple therapeutic effects into one system. Here, we explore a self-assembled supramolecular hydrogel composed of herbal cinnamaldehyde (CA) and folic acid (FA). This enables the Schiff base and the Ionic crosslinking as a dynamic double cross-linked network. This nano-scale hydrogel (C-FA-gel) maintains good adhesion and is apt to get peeled off from tissues without any residuals. Further experiments show a percutaneous absorption within 12 h after the hydrogel dressing perfectly fills the irregular wound by injection on pig skin. For muti-target therapeutics, the drug sustained-release of C-FA-gel exhibits broad-spectrum antibacterial activities without evident cytotoxicity. Besides, the topical dressing on rat skin promotes wound healing via multifunctional effects including inflammatory reduction, facilitation of the angiogenesis improvement, and regeneration promotion of skin appendages. Moreover, the C-FA-gel induces anti-inflammatory macrophages from pro-inflammatory macrophages. Therefore, we successfully present a self-assembled hydrogel using the ‘one system’ strategy. This study offers a green and efficient design for the potential to be applied to complicated wound treatment.

Preparation of a nanocellulose/nanochitin coating on a poly(lactic acid) film for improved hydrolysis resistance

Growing concerns regarding plastic waste have prompted various attempts to replace plastic packaging films with biodegradable alternatives such as poly(lactic acid) (PLA). However, their low hydrolysis resistance owing to the presence of aliphatic polyesters limits the shelf life of biodegradable polymers. Hydrolysis leads to the deterioration of mechanical performance, which is a key disadvantage of biodegradable plastics. In this study, a layer-by-layer (LBL) assembly method was used for the dip-coating of biorenewable, biodegradable nanocellulose/nanochitin on the PLA surface. Additional crosslinking and compression of the coated nanofibers, each containing carboxylic acid and amine groups, respectively, were induced through electromagnetic microwave irradiation to protect the PLA film by improving hydrolysis resistance. The coatings were examined by morphological observations and water contact angle measurements. The LBL coatings of differently charged nanofibers of 10.6 μm were reduced to 40 % after microwave treatment, and the thickness does not vary after the hydrolysis experiment. Microwave irradiation increased the water contact angle owing to amide linkage formation, thereby preventing the peeling off of coating layers. Improved hydrolysis resistance inhibited the reduction in molecular weight and tensile strength. These findings could be used to develop sustainable and biodegradable plastic packaging films with a prolonged shelf life.

Non-iterative border-peeling clustering algorithm based on swap strategy

Border-Peeling algorithm is a recently proposed density based clustering algorithm. The method of peeling off border points by continuous iteration and calculating the density influence value by using the Gaussian kernel distance makes the algorithm more complex. At the same time, there is a risk of excessive peeling of small clusters on unbalanced datasets, which leads to a large number of noise misidentification. In order to reduce the time consumption and improve the clustering performance on unbalanced datasets, this paper proposes a non-iterative border-peeling clustering algorithm. First, the potential core points are determined by the centroids of k-nearest neighbor. Secondly, the points with lower local relative density in the core points and the points with higher relative density in the border points are exchanged to complete the distinction between the core points and the border points. Then basic DBSCAN method is used to cluster core points and noise points. Finally, the associations between the border points and the core points are based on the number of reverse nearest neighbors of the border points in the core points. Our method has achieved competitive results on 10 synthetic datasets and 8 UCI real-world datasets.

Synthesis of titanium carbide coating on Ti15Mo alloy and its tribological behaviour

AbstractTi15Mo alloy has been regarded as one of the most potential biomedical materials due to its excellent performance. However, the low hardness and poor wear resistance of titanium alloy limit the further application. Therefore, high temperature solid carburising technology was performed on the surface of Ti15Mo alloys to prepare titanium carbide (TiC) coating with graphene (G) as the carburising agent. The microstructure, mechanical properties, and tribological properties of TiC coating under different lubricants were investigated. Results showed that TiC coating was closely bonded to the titanium substrate. The maximum thickness of TiC coating treated with 1150°C was approximately 184.02 μm, and the microhardness of alloys treated with 1100°C can achieve 1221.5 HV. All modified Ti15Mo alloys showed improved tribological performance compared to the original samples. The wear mechanisms of modified Ti15Mo alloys were abrasive wear and adhesive wear under the SBF lubricant, and the TiC coating was slightly peeled off. The overall friction coefficient and wear rate under 25% calf serum lubricant were lower than the SBF lubricant, and surface scratches were almost absent, and slight abrasive wear and adhesive wear occurred on the surface.

FORMULASI DAN EVALUASI KESTABILAN FISIK SEDIAAN MASKER GEL PEEL-OFF DARI SARI BUAH LEMON CUI (Citrus microcarpa Bunge.)

Lemon cui also known as fish lemon or kalamansi lemon is known to contain one of them vitamin C which has the potential as an antioxidant so that it can be applied as active ingredient in peel off mask preparations. The aims of this study weretoobtaining the best PVA concentration in the manufacture of peel-off gel masks from lemon cui juice that meet the stability test requirements. physique. The method of making a sample of lemon cui juice is obtained by grinding it using a blender, adding 100 mL of water and then separating the pulp to obtain the juice. The formulation of peel-off gel mask preparations uses variations in the concentration of PVA (Polyvinyl Alcohol), namely F1 (10%), F2 (13%) and F3 (16%). Physical stability tests included organoleptic tests, homogeneity tests, spreadability tests, pH tests, adhesion tests and drying time tests.The results showed that the preparations F1, F2 and F3 showed physical stability based on the results of organoleptic tests, homogeneity tests, spreadability tests, pH tests, adhesion tests and drying time tests before and after accelerated storage conditions. Based on the test results obtained, it can be concluded that the formulation of the Lemon Cui peel-off gel mask preparation from the three concentrations of PVA met the requirements for physical stability. The best PVA concentration is 10% because it has the best dry time.

Study on the preparation of CeO2-doped AlCoCrFeNiTi high entropy alloy bioinert coatings by laser cladding: The effect of CeO2 particle size on the tribological properties of the coatings

The AlCoCrFeNiTi high entropy alloy (HEA) bioinert wear-resistant coatings reinforced by doping CeO2 particles were prepared on the surface of Ti6Al4V via laser cladding technique. In order to find out the effect of CeO2 particle size on the tribological properties of AlCoCrFeNiTi HEA coatings, the coatings doped with 1 wt% nano, submicron, and micron CeO2 particles were prepared respectively. The phase composition and microstructure of the coatings were analyzed, and the fracture toughness values of the coatings were tested. Friction and wear properties of the coatings sliding against Si3N4 ceramic grinding balls were tested under dry friction and wet friction (simulated body fluid, SBF) conditions, respectively. The results showed that the CeO2 particle size had a significant impact on the wear mechanisms of the coating and thereby improved its tribological properties. Doping with submicron CeO2 particles had the most significant improvement on the tribological properties of the coatings, followed by micron CeO2 particles, and doping with nano CeO2 particles had the weakest improvement on the tribological properties of the coatings. The distribution of submicron CeO2 particles in the coating was more dispersed and uniform, which significantly reduced the crack sensitivity of the coatings, inhibited the peeling off of the oxide film on the coating surfaces, and played a lubricating role. Under dry friction and SBF conditions, the friction coefficient of the coatings doped with submicron CeO2 particles decreased by 41.81% and 27.27%, respectively, and the wear resistance increased by 55.14% and 50.69%, respectively. This study has important reference value for the development of new bioinert wear-resistant coatings.

Monte Carlo radiative transfer peel off mechanism for spatially extended detectors

We present an extension to the well-known peel off optimization for Monte Carlo radiative transfer simulations. The classical method is only applicable when the distance between the detector and the peel off event is much bigger than the size of the detector. We use two alternatives to the classical method and calculate the peel off intensity via a subdivision and an integration method. We compare their performance for a realistic scenario and derive guidelines for a general treatment. This allows for precise peel off calculations at any distance to the detector surface.

A Study On Preparation And Evaluation Of Herbal Peel Off Face Mask

Skin care preparations are designed to exert local activity when applied over the skin mucous membrane, these skin preparations include gel, lotion, ointment, cream, peel off mask etc. Peel off mask is the type of dosage form which is gently applied onto the facial skin surface and is peeled off after a few minutes of its application. It is designed to address common skin concerns and tightening of skin, moisturizing and tan removal from the skin. Here we are formulating of Turmeric peel off face mask. Turmeric extract adds glow to the skin, treats acne, slows down skin ageing. Aloe vera gel helps to remove acne and moisturizing the skin and have soothing property. Excipients used in the formulation are PVA (polyvinyl alcohol), glycerin, gelatin citric acid. Different formulations were taken and evaluated for the various parameters like spreadability, pH, stability studies, peeling time etc. The formulation evaluated for the parameters stands in standard range.