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Thermal and mechanical properties of PVDF/PANI blends
Malmonge, Luiz Francisco;Langiano, Simone do Carmo;Cordeiro, Jo?o Manoel Marques;Mattoso, Luiz Henrique Capparelli;Malmonge, José Antonio;
Materials Research , 2010, DOI: 10.1590/S1516-14392010000400007
Abstract: poly(vinylidene fluoride)/polyaniline blends of different composition were synthesized by chemical polymerization of aniline in a mixture of poly(vinylidene fluoride) and n,n-dimethylformamide and their thermal and mechanical behavior was investigated as a function of the polyaniline doping level and the composition using thermogravimetric analysis, differential scanning calorimetry, dynamic mechanical analysis and tensile tests techniques. the results showed the blend obtained presents a good thermal stability with low weight loss up to 300 oc, assigned to water and solvents evaporation. the glass transition and melting point is not affected by the pani content in the blend, showing that polymers are no miscible. the films produced present a good sustainability; however the presence of the conducting polymer in the blend increases the tensile strength and the young modulus, while diminishes the elongation at break, as compared to pure pvdf.
Electrochemical Behavior of CoSb3-based Electrodes Using Binary PAni/PVDF Binder
Jian XIE,Xinbing ZHAO,Gaoshao CAO,
Jian
,XIE,Xinbing,ZHAO,Gaoshao,CAO

材料科学技术学报 , 2007,
Abstract: The polyaniline (PAni)/polyvinylidene fluoride (PVDF) hybrid was served as a novel binder for CoSb3-based alloy electrode. The effect of PAni content on the electrochemical performances of the alloy electrode was investigated. It was found that the CoSb3 electrode using the binary PAni/PVDF binder exhibits higher reversible capacity than that using the single PVDF binder, especially in the initial cycles. As a result, the PAni/PVDF hybrid could be a promising binder for the alloy electrode.
MWNTs/掺溴聚苯胺复合材料导电性能研究  [PDF]
吴玲娟,叶葏,韩菲菲,梁旦,高建生,盛玮,徐学诚
华东师范大学学报(自然科学版) , 2010,
Abstract: 用化学氧化法和溴蒸气掺杂合成掺溴聚苯胺,通过机械共混制备MWNTs/PANI和MWNTs/掺溴PANI复合材料.复合材料表现出良好的导电性能,电导率达5~10S·m^-1,接近纯MWNTs的电导率.采用红外光谱、热重分析、紫外可见光谱、X射线粉末衍射和X射线光电子能谱研究MWNTs/掺溴PANI复合材料的导电性能和导电机理.研究表明,MWNTs和被掺杂的掺溴PANI通过π-π和p-π共轭作用形成电子转移复合物,组成了一个个独立导电单元,在复合材料的导电体系中起主要作用,随着导电单元数量增加至相互接触,形成导电网络,复合材料的电导率达到最大值.
Membranes of Polyvinylidene Fluoride and PVDF Nanocomposites with Carbon Nanotubes via Immersion Precipitation  [PDF]
Gaurav Mago,Dilhan M. Kalyon,Frank T. Fisher
Journal of Nanomaterials , 2008, DOI: 10.1155/2008/759825
Abstract: Microporous polyvinylidene fluoride (PVDF) and PVDF nanocomposite membranes were prepared via an isothermal immersion precipitation method using two different antisolvents (ethanol and water). The structure and morphology of the resulting membranes were investigated by wide angle X-ray diffraction (WAXD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). The effects of the type of the antisolvent and the presence of multiwalled carbon nanotubes (MWNTs) on membrane morphology and the crystal structure developed within the membranes were studied. The crystallization of the PVDF upon immersion precipitation occurred predominantly in the -phase when water is used as the antisolvent or in the absence of the carbon nanotubes. On the other hand, -phase crystallization of the PVDF was promoted upon the use of ethanol as the antisolvent in conjunction with the incorporation of the MWNTs. The morphology and the total crystallinity of the PVDF membranes were also affected by the incorporation of the MWNTs and the antisolvent used, suggesting that the microstructure and the ultimate properties of the PVDF membranes can be engineered upon the judicious selection of crystallization conditions and the use of carbon nanotubes.
Effect of MWNTs and SiC-Coated MWNTs on Properties of PEEK/LCP Blend  [PDF]
Ganesh Chandra Nayak,R. Rajasekar,Saswata Bose,Chapal Kumar Das
Journal of Nanotechnology , 2009, DOI: 10.1155/2009/759374
Abstract: Multiwall carbon nanotubes (MWNTs) were modified with polycarbosilane-derived silicon carbide (SiC) to improve its dispersion in the polymer matrix. PEEK/LCP/MWNTs nanocomposites were prepared by melt blending. TEM images show the improved dispersion of SiC-coated MWNTs against agglomerated structure of pure MWNTs in the blend. FESEM images shows better fibrillation of LCP in presence of SiC-coated MWNTs. TGA reveals that nanocomposites with SiC-coated MWNTs shows higher thermal stability than MWNTs filled blend system. Based on enhanced dispersion, storage modulus, tensile modulus and tensile strength were increased drastically with the incorporation of SiC-coated MWNTs. Glass transition temperature of the nanocomposites shows significant improvement with the incorporation of MWNTs.
Mechanical properties and thermal behaviour of LLDPE/MWNTs nanocomposites
Jin-hua, Tai;Guo-qin, Liu;Huang, Caiyi;Lin-jian, Shangguan;
Materials Research , 2012, DOI: 10.1590/S1516-14392012005000122
Abstract: multi-walled carbon nanotubes (mwnts) were incorporated into a linear low-density polyethylene (lldpe) matrix through using screw extrusion and injection technique. the effect of different weight percent loadings of mwnts on the morphology, mechanical, and thermal of lldpe/mwnts nanocomposite had been investigated. it was found that, at low concentration of mwnts, it could uniformly disperse into a linear low-density polyethylene matrix and provide lldpe/mwnts nanocomposites much improved mechanical properties. thermal analysis showed that a clear improvement of thermal stability for lldpe/mwnts nanocomposites increased with increasing mwnts content.
PANI and Graphene/PANI Nanocomposite Films — Comparative Toluene Gas Sensing Behavior  [PDF]
Mitesh Parmar,Chandran Balamurugan,Dong-Weon Lee
Sensors , 2013, DOI: 10.3390/s131216611
Abstract: The present work discusses and compares the toluene sensing behavior of polyaniline (PANI) and graphene/polyaniline nanocomposite (C-PANI) films. The graphene–PANI ratio in the nanocomposite polymer film is optimized at 1:2. For this, N-methyl-2-pyrrolidone (NMP) solvent is used to prepare PANI-NMP solution as well as graphene-PANI-NMP solution. The films are later annealed at 230 °C, characterized using scanning electron microscopy (SEM) as well Fourier transform infrared spectroscopy (FTIR) and tested for their sensing behavior towards toluene. The sensing behaviors of the films are analyzed at different temperatures (30, 50 and 100 °C) for 100 ppm toluene in air. The nanocomposite C-PANI films have exhibited better overall toluene sensing behavior in terms of sensor response, response and recovery time as well as repeatability. Although the sensor response of PANI (12.6 at 30 °C, 38.4 at 100 °C) is comparatively higher than that of C-PANI (8.4 at 30 °C, 35.5 at 100 °C), response and recovery time of PANI and C-PANI varies with operating temperature. C-PANI at 50 °C seems to have better toluene sensing behavior in terms of response time and recovery time.
Characterization of Copolymer Based in Polyurethane and Polyaniline (PU/PANI)
Rangel-Vázquez, Norma Aurea;Salgado-Delgado, René;García-Hernández, Edgar;Mendoza-Martínez, Ana María;
Journal of the Mexican Chemical Society , 2009,
Abstract: the present work describes the synthesis and characterization of polyurethane (pu), polyaniline (pani) and three ipns (90/10, 80/20, 70/30) ratios were characterized by fourier transformed infrared (ftir) to analyze the generated functional groups of the synthesis. the combination pu/pani was accomplished through the interconnection of the two polymers via condensation of pu prepolymer terminal nco groups and the amine groups of pani. dma studies indicated that the pu had higher glass transition temperatures (tg) with the increase of pani. sem micrographics were obtained to 1000x of the pu, pani and the ratios 90/10, 80/20 and 70/30 of pu/pani. a morphological interpretation was proposed in which pani chains formed a phase dispersed in a pu matrix, linked together by an interphase, that could be responsible for the connectivity between the two polymers and determine excellent mechanical properties.
改性MWNTs/纳米HA/PLA骨修复材料的制备  [PDF]
张晓明,王洪艳,李俊锋
吉林大学学报(工学版) , 2008,
Abstract: 采用气相氧化法及液相氧化法制备了带有羧基的多壁碳纳米管(MWNTs—COOH)。在超声波辅助下,通过原位合成法将纳米羟基磷灰石(nanoHA)包覆在MWNTs—COOH上,得到纳米复合材料(MWNTs—COO/nanoHA),该纳米复合材料与聚乳酸(PLA)熔融共混成功制备出MWNTs—COO/nanoHA/PLA骨修复材料。经过FTIR、XRD、TEM和电子拉力等分析表明,MWNTs—COOH完全被nanoHA包覆,MWNTs—COO/nanoHA复合材料颗粒完全达到纳米级。实验考察了复合材料中不同含量的MWNTs—COOH和MWNTs—COO/nanoHA对力学性能的影响,确定了MWNTs—COOH和MWNT—COO/nanoHA在材料中的最佳比例。
Synthesis, Characterization and Studies of PANI-MMT Nanocompoisites
Nanoscience and Nanotechnology , 2012, DOI: 10.5923/j.nn.20120204.01
Abstract: In this work synthesis & characterization of composite materials based on montmorillonite (MMT) clay and intrinsically conducting polyaniline (PANI) is studied. The MMT type of clay used is locally available in the region which was used after chemical activation. The main thrust of this work was to know the possibility of usage of locally available clay to synthesise novel nanocomposites. Synthesises of PANI and processing and treatment of this clay was carried out in the lab by the authors. PANI was successfully incorporated into MMT to form PANI-MMT nanocomposites. The resulting organic-inorganic hybrid material, PANI- MMT has been characterized by various physicochemical techniques. Formation of PANI inside the clay tactoid has been confirmed by X-ray diffraction studies. Infrared spectroscopy studies reveal the presence of physicochemical interaction, probably hydrogen bonding, between clay and polyaniline. One of the main technological applications of conducting polymers, particularly PANI, is in the area of corrosion protection of active metals. PANI-MMT nanocomposites synthesized using the present method is generally used to protect steel surface against corrosion.
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