文章摘要
脱掺杂聚苯胺纳米纤维/低密度聚乙烯复合材料的制备及介电性能
Preparation and Dielectric Properties of Dedoped Polyaniline Nanofibers/Low Density Polyethylene Composites
  
DOI:10.16865/j.cnki.1000-7555.2018.03.030
中文关键词: 聚苯胺  纳米复合材料  电导率  击穿强度  相对介电常数  介电损耗
英文关键词: polyaniline  nanocomposites  conductivity  breakdown strength  relative dielectric constant  dielectric loss
基金项目:国家自然科学基金重点项目(513300363);黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2016027)
作者单位
李长明1,刘文鑫1,张城城1,马凤莲1,韩宝忠1,2 1. 哈尔滨理工大学 工程电介质及其应用教育部重点实验室,黑龙江 哈尔滨 150080
2. 上海起帆电缆股份有限公司,上海 200008 
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中文摘要:
      采用苯胺单体与氧化剂“迅速混合”的聚合方法制备了盐酸掺杂的聚苯胺(PANI)纳米纤维,后经氨水脱掺杂得到脱掺杂聚苯胺纳米纤维,利用扫描电子显微镜观察了脱掺杂PANI纳米纤维的形貌。通过熔融共混的方式配制出不同PANI用量的脱掺杂PANI纳米纤维/低密度聚乙烯(LDPE)复合材料,采用傅里叶变换红外光谱研究了纳米复合材料的结构,并测量了不同温度、不同PANI用量的脱掺杂PANI纳米纤维/LDPE复合材料的电导率、击穿强度和不同频率下相对介电常数及介电损耗。研究结果表明,实验得到了直径均一的脱掺杂PANI纳米纤维;添加适量的脱掺杂PANI纳米纤维的LDPE复合材料电导率降低;添加少量脱掺杂PANI纳米纤维复合材料的击穿强度没有降低;复合材料的相对介电常数先降低后增大,但介电损耗一直在增大。
英文摘要:
      Polyaniline (PANI) nanofibers doped with hydrochloric acid were prepared by “rapid mixing” of aniline monomer and oxidant. The dedoped PANI nanofibers were obtained by dedoped using ammonium hydroxide. The morphology of PANI was characterized by scanning electron microscopy (SEM). The dedoped PANI nanofibers/low density polyethylene (PANI/LDPE) composites with different PANI nanofibers contents were obtained by melt blending method. The structures of the nanocomposites were studied by Fourier transform infrared spectrometer (FT-IR). Electrical conductivity, breakdown strength under different temperatures, the relative dielectric constant and the dielectric loss at different frequencies of dedoped PANI nanofibers/LDPE composites were measured. The results show that the dedoped PANI nanofibers are uniform with diameters; the electrical conductivity of the nanocomposites with a modest amount of dedoped PANI nanofibers decreases; the breakdown strength of the nanocomposites does not reduce with a small amount of dedoped PANI nanofibers; the relative dielectric constant of the nanocomposites declines first and then increases, but the dielectric loss factor increases all the time.
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