PANI/PVDF-PEO复合材料的制备及性能研究
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摘要
采用微乳液聚合法制备聚苯胺颗粒,并用流延法制备导电聚苯胺复合材料。利用SEM与TEM对导电聚苯胺形貌进行了分析,可知其尺寸为长100～200nm,宽30～50nm左右,形状为棒状。利用红外测试分析表明制备的聚苯胺为中间氧化态的聚苯胺。复合材料的介电性能测试说明导电聚苯胺的渗流阈值为0.13,此时介电常数与介电损耗均发生突变。本实验提高了复合材料的介电常数,在高储能密度电介质材料方面有广阔的应用。
PANI particles were prepared by microemulsion polymerization method and conductive PANI composites were prepared using this particles.Characterization results shows that conductive PANI was rod-like particles whose length was 100 to 200nm and width was 30 to 50 nm.IR shows that conductive PANI was intermediate oxidation state.The dielectric test shows that percolation threshold of conductive PANI in PVDF-PEO composite material is 0.13.Whlie reaching this percolation threshold,the dielectric constant and dielectric loss were mutated.In this study,the dielectric constant of the composite has greatly improved,it has a wide application in high energy density dielectric material.
PANI particles were prepared by microemulsion polymerization method and conductive PANI composites were prepared using this particles.Characterization results shows that conductive PANI was rod-like particles whose length was 100 to 200nm and width was 30 to 50 nm.IR shows that conductive PANI was intermediate oxidation state.The dielectric test shows that percolation threshold of conductive PANI in PVDF-PEO composite material is 0.13.Whlie reaching this percolation threshold,the dielectric constant and dielectric loss were mutated.In this study,the dielectric constant of the composite has greatly improved,it has a wide application in high energy density dielectric material.
引文
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[2]Kuo D H,Chang C C,Wang W K,et al.Dielectricbehaviors of multi-doped BaTiO3/epoxy composites[J].Journal of the European Ceramic Society 2001,21(9):1171-1177.
[3]Wang C M,Kao K S,Lin S Y,et al.Processing and properties of CaCu3Ti4O12 ceramics[J].Journal of Physicsand Chemistry of Solids 2008,69(2/3):608-610.
[4]段春英,周静芳,吴志申,等.聚苯乙烯/Ag核壳结构纳米微粒的制备及表征[J].物理化学学报,2003,19(11):1049-1053.
[5]李杰,韦平,汪根林,等.高介电复合材料及其介电性能研究[J].绝缘材料,2003,36(5):3-6.
[6]Li Q,Xue.Q Z,Hao L Z,et al.Large dielectric constant of the chemically functionalized carbon nanotube/polymercomposites[J].Composites Science and Technology 2008;68(10-11):2290-2296.
[7]Asturians G E,MacDiarmid,McCall R P,et al.Theoxidation state of "emeraldine" base[J].Synthetic Metals.1989,29(1):157-162.
[8]Chan H L W,Zhang Q Q,Choy G L.Dielectricpermittivity of PCLT/PVDF-TRFE nanocomposites[J].Dielectrics and Electrical Insulation,2007,7(2):204-207.
[9]Huang C,Zhang Q M,Su J.High-dielectric-constantall-polymer percolative composites[J].Applied PhysicsLetters,2003,82(20):3502-3504.