Emulsion Polymerization Method Research Articles

Synthesis of Poly(methacrylamide‐co‐methacrylic acid) Nanogels: Effect of Synthesis Parameters on the Nanosize, Characterization and Stimuli‐Sensitive Characteristics

AbstractPoly(methacrylamide‐co‐methacrylic acid) P(MAAm‐co‐MAAc) nanogels were synthesized using emulsion polymerization method and characterized in terms of structure, stimuli‐sensitive behavior and nanosize. The effect of monomer, surfactant (sodium dodecyl sulfate) and cross‐linker (N,N′‐methylenebisacrylamide) concentration on the nanosize of the nanogels was investigated. The hydrodynamic size of nanogels was determined by dynamic light scattering (DLS) and it was found to be in the range of 109.8–146.1 nm. Polydispersity index (PDI) values were lower than 0.3 (in the range of 0.145–0.261) confirming the narrow size distribution of the nanogels. Zeta potential measurements indicated that the nanogels exhibited good stability. Stimuli‐sensitive behavior of the nanogels was evaluated using UV‐visible spectroscopy. Characterization of the nanogels was carried out by Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), X‐ray diffraction (XRD) and scanning electron microscopy (SEM).

Investigation of controlled salmeterol xinafoate and fluticasone propionate release from double molecular imprinted nanoparticles

AbstractSalmeterol xinafoate (SAM) and fluticasone propionate (FLU) are one of the drug combinations used together in the treatment of lung diseases such as asthma and chronic obstructive pulmonary disease (COPD). The aim of this study is to investigate the usability of novel dual molecular imprinted nanoparticles (poly(2-hydroxyethyl methacrylate-N-methacryloyl-(L)-alanine-N-methacryloyl-(L)-histidine) [p(HEMA-MAAL-MAH)], abbr. DMIPNPs) as a controlled drug release systems. In this study, SAM and FLU drugs were chosen as model drugs because they are used in the treatment of these diseases. DMIPNPs were prepared by surfactant-free emulsion polymerization method and characterized by scanning electron microscopy (SEM) and fourier transform infrared spectrometer (FTIR). In in vitro drug release experiments, drug release conditions were optimized. SAM and FLU release from DMIPNPs experiments were also performed in the simulated lung fluid (SLF). The amount of released SAM and FLU were found as 4.79 and 5.68 mg/g in the SLF medium at the end of 48 h, respectively. The release kinetics of SAM and FLU from DMIPNPs were calculated in the SLF medium. The release of SAM and FLU was determined to be compatible with the Higuchi release models. According to these results, these DMIPNPs, dual-template molecular imprinted nanoparticles with dual monomers, are promising materials that can be used in the controlled release of two different drugs. Graphical abstract

Influence of the aniline concentration on the morphology and property of polyaniline nanotubes and their polymerization mechanism

Polyaniline is a kind of polymer material with excellent electrochemical performance, and it stands out among a number of conductive polymer materials owing to its low cost, easy availability of raw materials, and excellent physical and chemical properties. However, the poor processability of polyaniline impedes its broad application. Preparing nanosized structure and introducing big molecular organic acids as dopant are practical strategies to solve this problem. Here using ammonium persulfate as oxidant, sodium dodecyl sulfate as surfactant, and 3,5-dinitrobenzoic acid as doping acid, polyaniline nanotubes were successfully prepared via emulsion polymerization method and characterized by various measurements. The influence of aniline concentration on the morphology and property of the product was explored. The polymerization mechanism of polyaniline nanotubes was discussed in detail based on the analysis of the microscopic morphology. As the concentration of aniline monomer increases, the position of the characteristic absorption peak in the infrared spectrum of the polyaniline main chain remains almost unchanged, but the ratio of benzene to quinone gradually increases. Along with the increasing aniline concentration, the crystallinity of polyaniline gradually decreases from 56.21% to 40.37%. In addition, the optimal conductivity is 2.05×10−2 S/cm when the concentration of aniline monomer is 0.5 mol/L.

Organelle-like water-borne curcumin nanoparticles with smart fluorescence for anti-counterfeiting and food quality monitoring

Current fluorescent labels are often expensive and environmentally unfriendly and tend to lose their fluorescence when combined with dry and hydrophilic substrates because of their hydrophobic nature. Thus, the development of environmentally friendly, low-cost, and scalable fluorescent materials is still highly desirable but significantly challenging, especially for anti-counterfeiting and food quality monitoring. In this study, highly fluorescent nanoparticles were prepared by mimicking organelles and using natural and sustainable curcumin as a fluorescent component. The preparation process was easily scalable via traditional seeded emulsion polymerization methods and green without using additional organic solvents. The resulting curcumin-based fluorescent nanoparticles (CFNs) were well dispersed in water, offering smart fluorescence in water-based environments or a dried polymer coating. In particular, CFNs-based coatings could be used for effective smart anti-counterfeiting and food quality monitoring. The proposed strategies may inspire the design of novel, green, and sustainable smart fluorescent materials/coatings for applications in anti-counterfeiting, smart food tags and labels, and visual sensing systems.

Development of an amine-impregnated polymer aerogel for CO2 capture

The synthesis and characterization of amine-impregnated polymer aerogels for CO2 capture represents a groundbreaking advancement in combating the urgent challenges of carbon dioxide (CO2) emissions and climate change mitigation. The traditional way of synthesizing aerogels for CO2 capture is to use a one-step gelation process without functionalizing the aerogel, which, to some extent, has low CO2 capture capacity and kinetics. This study finds a method of synthesizing the functionalized aerogel, which has high CO2 adsorption capacity, faster kinetic, and is more stable. The polymer aerogel was developed using an oil-water emulsion polymerization method, followed by freeze-drying. It was impregnated with a mono-ethanolamine (MEA) solution to enhance CO2 adsorption. The performance of the amine-impregnated poly (AAm-co-AAc) aerogels was tested in a continuous adsorption column filled with aerogel. The adsorption results showed the amine-impregnated aerogels having an amine equilibrium uptake value of 40% had significantly improved CO2 capture capacity up to 2.34 mmole g−1 at 1 bar pressure, 25 °C reaction temperature, and 10 ml/min flow rate. The polymeric aerogel has a very fast adsorption rate, as it can capture 90% of its maximum capacity within just 10 minutes. Then the kinetic data of the CO2 adsorption was modelled and found to best fit on both pseudo-1st and 2nd-order kinetic models, proposing that the adsorption mechanism on aerogel was controlled by surface diffusion and chemisorption. Furthermore, the isotherm data were evaluated and observed to be best represented by the Langmuir isotherm model, suggesting monolayer formation on the aerogel. After five adsorption-desorption cycles, the amine impregnated poly (AAm-co-AAc) aerogel was able to preserve the initial capacity without a significant decrease. These findings underscore the immense ability of amine-impregnated poly (AAm-co-AAc) aerogels as highly efficient adsorbents for CO2 capture, thus offering a speedy adsorption process and showing stable regeneration capacity, thereby exhibiting greater industrial application potential.

Photothermally responsive and durable polydopamine-modified MXene-PNIPAM hydrogels for smart friction regulation

In this study, a polydopamine (PDA)-modified MXene-PNIPAM (pMP) hydrogel is prepared using a soap-free emulsion polymerization method, which shows enhanced anti-oxidative, photo-thermal, and tribological properties. The introduction of PDA not only inhibits the oxidation of MXene but also enhances the photo-thermal conversion efficiency of the hydrogel. Even after 50 days, it can still maintain good photo-thermal conversion performance. Moreover, compared with PNIPAM hydrogel, the friction coefficient (COF) and wear volume of pMP hydrogel as lubricant were reduced by 33% and 85%, respectively. Interestingly, the control of COF with excellent reversibility and durability is achieved using pMP hydrogel modulated by near-infrared light. The pMP composite hydrogel exhibits promising prospects in the fields of intelligent robots and biomedical devices.

N, O-Doped Walnut-Like Porous Carbon Composite Microspheres Loaded with Fe/Co Nanoparticles for Adjustable Electromagnetic Wave Absorption.

This study addresses the challenge of designing simple and environmentally friendly methods for the preparation of effective electromagnetic wave (EMW) absorbing materials with tailored microstructures and multi-component regulation. N, O doped walnut-like porous carbon composite microspheres loaded with FeCo nanoparticles (WPCM/Fe-Co) are synthesized through high-temperature carbonization combined with soap-free emulsion polymerization and hydrothermal methods, avoiding the use of toxic solvents and complex conditions. The incorporation of magnetic components enhances magnetic loss, complementing dielectric loss to optimize EMW attenuation. The unique walnut-like morphology further improves impedance matching. The proportions of Fe and Co components can be adjusted to regulate the material's reflection loss, thickness, and bandwidth, allowing for fine-tuning of absorption performance. At a low filling ratio (16.7%), the optimal WPCM/Fe-Co composites exhibit a minimum reflection loss (RLmin ) of -48.34dB (10.33GHz, 3.0mm) and an overall effective absorbing bandwidth (EAB) covering the entire C bands, X bands, and Ku bands. This work introduces a novel approach to composition regulation and presents a green synthesis method for magnetic carbon composite absorbers with high-performance EMW absorption at low loading.

Development of functionalized polymeric nanomaterial by organosiliconic reagent for boronate affinity-based dopamine recognition

The dopamine neurotransmitter is mainly responsible for endocrine functions in our body. The increase in the level of dopamine in the human body leads to many disorders such as schizophrenia, uncontrollable tics, addiction, increased tension, desire to act excessively, and carelessness. Decreased levels of dopamine cause problems such as malnutrition, stress, insomnia, and the use of antidepressants. Recognition of dopamine is crucial for clinical experiments. Therefore, the development of recognition surfaces of dopamine is essential for isolation, purification, and determination processes. This study, it was aimed to produce a polymeric nanomaterial that can recognize dopamine. For this purpose, p(HEMA) polymer was synthesized with surfactant-free emulsion polymerization method and silanized by organosilicon reagent (3-aminopropyl) triethoxylsilane (APTES) and modified with phenylboronic acid (PBA). Characterization of the p(HEMA)-APTES-PBA nanopolymeric system for dopamine recognition was performed with Scanning Electron Microscope(SEM), Energy Dispersive Spectrometry (EDS), Fourier Transform Infrared Spectroscopy (FTIR), Zeta-size/zeta-potential analysis, surface area calculations. Dopamine affinity of the p(HEMA)-APTES-PBA was optimized in terms of pH, time, concentration, buffer concentration, and buffer type parameters. Dopamine adsorption of p(HEMA)-APTES-PBA nanopolymers was 4,8 times more than epinephrine in specificity analysis. After the 7 adsorption–desorption cycles, the desorption rate was found to be 74.8 %. The developed nanopolymeric system is a convenient method with high adsorption capacity which allows easy and rapid extraction, isolation, and purification of dopamine.

Maintenance-free antifouling polymeric membrane potentiometric sensors based on self-polishing coatings.

Polymeric membrane ion-selective electrodes (ISEs) have been widely used in environmental monitoring. However, in complicated marine environments, marine biofouling usually becomes a sticky problem for these electrodes. Herein, for the first time, a novel maintenance-free antifouling potentiometric marine sensor based on a self-polishing coating (SPC) is proposed. The SPC is synthesized by using the seeded emulsion polymerization method based on the triisopropylsilyl methacrylate monomer as the regulator of the self-renewal rate. This coating can be simply modified onto the electrode surface by drop-casting. The silyl acrylate side groups of the obtained SPC on the sensor surface can be hydrolyzed in the marine alkaline medium. The shear movement of seawater driven by sea waves, wind, gravity, or vibration removes the leftover (fouled) brittle polymer backbone and thus the fouling marine microorganisms. As a proof-of-concept experiment, a polymeric membrane Ca2+-ISE is chosen as a model. Compared to the unmodified electrode, the SPC-coated Ca2+-ISE exhibits remarkable improved antifouling properties in terms of superior anti-adhesive abilities towards marine microorganisms, such as bacterial cells and algae and excellent long-term stability even in the presence of high levels of marine microorganisms. Since no additional manual maintenance is required for maintaining the antifouling abilities of the sensor, the proposed self-polishing sensor may lay an important foundation for construction of unattended long-term potentiometric monitoring systems in real marine environments.

TEMPERATURE REGULATING POLYESTER SHORT STAPLE RING SPUN YARNS BY PCM NANOCAPSULE APPLICATION

Phase change materials (PCMs) are thermal energy storage materials and therefore they are used for the manufacturing of heat-storage and thermo-regulated textiles. In this study, it was aimed to produce polyester spun yarns with thermo-regulation function via an alternative capsule application method. In the study, PMMA-co-MAA walled nanocapsules were synthesized by emulsion polymerization method and an alternative capsule application method was used to apply PCM nanocapsules into the staple polyester yarn structure during the yarn production process. Ne 30/1 polyester ring spun yarns with knitted twist were produced and some of the PCM nanocapsule and produced yarn properties were analyzed. According to the results, PCM nanocapsules had dimensions around 200-400 nm, uniform size distribution and spherical morphology. They could store approximately 100 j/g heat and had sufficient thermal resistance. With the developed capsule application method, nanocapsules were successfully applied to spun yarn structure and produced polyester yarns exhibited temperature differences in the range of 2-5 °C compared with undoped reference ring spun yarns. The results of the study indicated that this application method could be an alternative to fabricate thermo-regulating fabric surfaces and such integrated yarn materials have demonstrated promising potential for the production of thermoregulating textile material.

Biobased Alkyd Acrylic Hybrid Core Shell Approach

The main objective of this work was to synthesize bio based alkyd-arcylic hybrid emulsion by using core shell approach. Step by step growing polymerization was used for the preparation of the bio-based alkyd resin. Bio-based sebacic acid was used in the synthesis. In the core shell approach; shell part contains acrylic polymer, core part contains bio based alkyd emulsion, which was synthesized by phase inversion. The acrylic shell was synthesized in the presence of the alkyd resin by the emulsion polymerization method.

Antimicrobial Biomaterials via Simultaneous Grafting of Methyl Methacrylate and N‐Vinyl Pyrrolidone onto Chitosan

AbstractChitosan is an antimicrobial biopolymer with significant potential for manufacturing biodegradable and biocompatible materials through further functionalization. These materials could be highly suitable for biomedical applications. In this study, in order to obtain better properties such as antimicrobial activity and adjustable hydrophilicity for biopolymer‐based applications, N‐vinylpyrrolidone (VP) and methylmethacrylate (MMA) were simultaneously grafted onto chitosan by a ceric‐initiated emulsion polymerization method. The chemical structure, thermal, morphological, and antimicrobial properties of the resulting materials were investigated. The results revealed that PMMA and PVP pendant groups were grafted onto the chitosan main chain. According to SEM measurements, the obtained materials had spherical shapes with diameters ranging from 250 to 950 nm for the components. In vitro antibacterial activity against both Gram‐positive and Gram‐negative bacteria was significantly improved in the obtained materials compared to pristine chitosan.

Thin film composite polyamide nanofiltration membranes with interlayer constructed with core-shell structured polystyrene-polyacrylamide nanospheres for antibiotics separation

Nanofiltration (NF) is an efficient and economic separation technology which has great application potential in solving worldwide water shortage. Constructing interlayer is an effective approach to fabricate thin film composite (TFC) polyamide (PA) NF membranes with better performance. Herein, the polystyrene-polyacrylamide nanospheres with core-shell structure were synthesized using an emulsion polymerization method. The PA NF membranes were prepared via interfacial polymerization (IP) on the mixed cellulose esters microfiltration (MCE MF) membranes which modified with the core-shell structured nanospheres. The fabricated PA NF membranes showed good performance with a pure water permeability of 18.9 L·m−2·h−1·bar−1 and Na2SO4 rejection of 97.4 %. The NF membranes also showed good antibiotics separation performance with rejection to levofloxacin (LEV), penicillin G (PG), tetracycline (TC), and erythromycin (ERY) of 97.1 %, 86.9 %, 92.2 %, and 96.4 %, respectively and efficient separation to antibiotics and NaCl. This work provides a feasible strategy to construct an interlayer of PA NF membranes with the core-shell structured polystyrene-polyacrylamide nanospheres.

Charged Surface of Polyacrylonitrile Colloid and Its Application to N2/CO2 Separation

AbstractNano‐sized polyacrylonitrile (PAN) colloidal dispersions of 44.6 ± 8.3 nm prepared by the modified emulsion polymerization method are utilized for gas separation. The emulsion (o/w) polymerization using organic solvent instead of precipitation polymerization is utilized, and both the size of the colloidal particle and the zeta potential could be controlled by the content of the material constituting emulsion. Thus, the solubility of CO2 is dependent on the zeta potential on the surface of colloids, resulting in that the degree of absorption of CO2 is controllable. Then, N2/CO2 separation experiment is carried out by applying the synthesized PAN colloidal dispersions into a polymer composite. The composite membranes are prepared by adding PAN colloidal dispersions based on poly(vinyl pyrrolidone) (PVP). It is observed that the neat PVP membrane has no separation performance, while the PVP/PAN colloidal composite film shows the improved N2/CO2 selectivity of 17. This improved separation performance is due to the fact that the solubility of CO2 decreased by absorption to specific functional groups, resulting in the enhancement of N2 separation.

A Polytetrafluoroethylene@Polyacrylonitrile core-shell composite with high tribological performance

As a lubricating additive, polytetrafluoroethylene (PTFE) exhibited poor wear resistance, high wear rate and weak adhesion strength, which restricted its application in the area of lubrication and wear protection. In this paper, we prepared a PTFE-based core-shell composite (PTFE@PAN) composed of PTFE core and polyacrylonitrile (PAN) shell through an emulsion polymerization method. The PTFE core with diameter of about 80–100 nm was wrapped by the PAN shell with the thickness of about 50–60 nm. The PTFE@PAN core-shell composite present better dispersion stability in lubricating oil (poly-α-olefin 6, PAO6) than PTFE. Additionally, the PTFE@PAN composite dispersed in PAO6 exhibited significantly reduction in friction coefficient and wear scar width up to 50 % and 25 % compared to PTFE, respectively. Meanwhile, the wear volume of PTFE@PAN composite under a load of 200 N was 4.855 × 104 μm3, was merely one twenty-seventh of that of PTFE (130.6 × 104 μm3). In comparison to conventional oil lubricants, this enhanced tribological properties of PTFE@PAN composite were conducive to a homogeneous transfer film composed of the dual-phase hard polymer (PAN) and soft PTFE polymer (PTFE). Compared with PTFE, the lower surface hardness and better flexibility of PAN shell led to deformation and gap filling with the entanglement and motion of the molecular chains, which could reduce the scratches and decline the abrasive wear of the rubbing surface significantly in the course of the friction process on a rough surface under the high load. That results also suggested that the PTFE@PAN core-shell composite will be a potential lubricating and wear-resistant additive.

A Facile One-Step Synthesis of Polystyrene/Cellulose (PS@MFC) Biocomposites for the Preparation of Hybrid Water-Absorbing Sponge Materials.

The elaboration of a low-cost and effective approach to synthesize hybrid composite materials based on the conventional thermoplastics and natural biopolymers is a sustainable alternative to the production of "traditional" plastics. Cellulose is one of the most abundant biopolymers. Its fibrils possess outstanding mechanical characteristics and, hence, attract considerable interest of researchers during recent decades. However, modification of the hydrophobic polymer matrix by cellulose fibrils is significantly complicated by the hydrophilic nature of the latter. In this study, we propose an effective and low-cost approach to the synthesis of polystyrene at the cellulose microfibrils composite material via the emulsion polymerization method. The obtained fibrous composite was comprehensively analyzed with FTIR spectroscopy, SEM, TGA, and DSC, and was further employed to produce sponge hybrid materials. We investigated the influence of the cellulose/polystyrene ratio on the density, porosity, pore volume, and water uptake of the obtained sponge materials. The sample containing 70 wt.% of cellulose demonstrated the best water absorption properties while preserving its shape, even after 24 h of floating on water. The produced sponge materials might be employed as sorption materials for the purification and desalination of waters of various origins, filtration, and collection of undesirable elements under specific industrial or natural conditions.

Novel polymeric organic gelator as lost circulation material for oil-based drilling fluids

With the exploitation of unconventional oil and gas resources towards deep and ultra-deep formations, oil-based drilling fluids (OBDFs) with white oil as a base oil have been increasingly employed in China to achieve safe, efficient, and fast drilling operations. However, due to the lack of effective lost circulation material (LCM), drilling time and drilling fluids are severely delayed and extra consumed, respectively. Herein, we innovatively propose and successfully develop a polymeric organic gelator using an emulsifier-free emulsion polymerization method and find that it achieves remarkable plugging ability in OBDF, superior to commercial LCMs, including asphalt, fine calcium carbonate, elastic graphite, and rubber particles. In detail, SMHDV with a branched C8 pendant group, benzene ring, isopropyl, and acetate groups is homogeneously dispersed in OBDF after hot rolling and capable of blocking permeable porous formations, resulting in a reduction of the cumulative filtration by 68 % at a concentration as low as 1 wt%. When added at a high concentration above 10 wt%, SMHDV turned into an organogel which can block cracks and prevent severe lost circulations together with other bridging materials. Furthermore, SMHDV maintains considerable plugging capacity in a wide temperature range of 80–150 °C, which meets most requirements of oil wells. The superior performance is attributed to the formation of supramolecular network structure in white oil due to the self-assembly behavior, which originated from the appropriate hierarchical polarities. In addition, the material can maintain stable rheological properties after hot rolling, improving the electrical stability of the drilling fluid. It is expected to form a set of scientific and efficient OBDF plugging technology to solve the leakage problems encountered during drilling.

Durability improvement mechanism of polymer cement protective coating based on functionalized MXene nanosheets modified polyacrylate emulsion

Polymer cement coatings (PCCs) have a wide range of applications in the field of concrete protection. Excellent durability of the PCCs is extremely essential for protecting the concrete in long-time service life. However, one of the most popular polymer emulsion, polyacrylate based cement coatings show insufficient durability and restrict their wide application in complicated and harsh environment. In this study, the novel two-dimensional nanomaterial MXene was incorporated to PCCs for improving the durability of the PCCs, the MXene was functinalized by vinyl triethylsilane (VTEO) (V-MXene) followed by in-situ seed emulsion polymerization method to synthesize the V-MXene modified polyacrylate emulsion. The effects of V-MXene incorporation on the rheological property, mechanical properties, bonding strength, UV aging resistance, saltwater immersion resistance, thermal aging resistance of PCCs were systematically investigated and the durability improvement mechanism was revealed. When the V-MXene dosage is 0.15 wt%, the tensile strength and bonding strength of the PCCs increased by 28.76 % and 30.84 % as compared with the blank samples, respectively. The introduction of V-MXene to PCCs can remarkably improve the UV aging resistance, saltwater immersion resistance, heat resistance. The V-MXene can decrease the UV radiation energy absorbed into the PCCs, and can create a “labyrinth effect”, prolonging the penetration path of water and corrosion ions. The V-MXene can also enhance the cross-linking density of the polymer phase combined with organic and inorganic interpenetrating networks, thereby enhancing the thermal stability of PCCs. This research provides a feasible strategy for the fabrication of high performance PCCs with excellent durability.

Analysis of The Susceptibility Value Dry Ink (Toner) From Raw Material Iron Sand Pasie Nan Tigo Beach and Rice Husk Biomass

The competition engaged in manufacture of the dry ink industry (toner) is increasing, with many types of dry ink (toner) emerging from various brands. This makes each brand compete to try to create quality dry ink. However, this is not easy, because raw material for making dry ink is expensive and stickiness of dry ink on the paper can change if the material is modified. The dry ink in this study was made by modifying the raw materials using natural mineral magnetic (Fe3O4) from the iron sand of Pasie Nan Tigo beach, activated carbon from rice husks biomass, and organic polymer Acacia Senegal. Taking into account the mixture of three raw materials in made of dry ink (toner) will affect the characteristics of dry ink (toner), one of the characteristics affected is the large content of magnetic minerals (Fe3O4) in it, it is necessary to test the value of susceptibility in dry ink (toner) to see the amount of magnetic minerals that are still present in the dry ink after mixing. The tool used for testing magnetic susceptibility values here is Bartington Magnetic Susceptibility MS2B. The purpose of this study is to produce quality dry ink with good dry ink paste power (toner) with based the characteristics of the susceptibility value of the dryink (toner). This research method uses extraction and coprecipitation methods and emulsion polymerization methods to increase the strength of the stickiness dry ink (toner) on paper. The results of characterization obtained by range 11924.60 x 10−8m3/kg until 27916.97 x 10−8m3/kg.

The Emeraldine salt PANI/SnO2 nanocomposite anode materials for sodium-ion batteries with enhanced initial coulombic efficiency

Tin oxide is promising candidate as an anode material for sodium-ion batteries. High volume change and the low electrical conductivity of SnO2 material during sodiation and de-sodiation affect negatively the electrochemical performance of sodium-ion batteries. Instead of their traditional carbon composites, the Emeraldine salt PANI/SnO2 nanocomposite to alleviate the high volume change (pulverization) and improve conductivity of SnO2 material is synthesized with an emulsion polymerization method by in situ polymerization of aniline on the SnO2 surface. The the Emeraldine salt PANI not only exhibits high flexibility to alleviate the high volume change of SnO2 nanoparticles, but also enhances the conductivity of electrons and sodium ions. Furthermore, the Emeraldine salt PANI coating enhanced the coulombic efficiency of SnO2 electrode. Therefore, Emeraldine salt Polyaniline coating is a promising buffer material for relieving a high volume change and enhancing coulombic efficiency, especially in the first cycle, and anode durability with the high electrochemical performance for sodium-ion batteries.