聚苯胺包覆镍纤维的制备及电性能研究
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摘要
镍纤维经预处理后,采用化学氧化法对其进行包覆改性,制备聚苯胺包覆改性镍纤维,以改善镍纤维的电性能。主要探究了掺杂剂种类、浓度、镍纤维长径比以及搅拌速率等因素对聚苯胺包覆镍纤维效果的影响,利用核磁共振、能谱仪和扫描电镜对产物进行元素和形貌分析,采用四探针电阻率测试仪测试聚苯胺包覆镍纤维的电性能。结果表明:以0.1mol/L盐酸为掺杂剂,将长径比为8mm的镍纤维在0～5℃下以60r/min的转速聚合得到聚苯胺包覆镍纤维材料,其包覆层致密均匀,且得到最大的电导率,其值为2.62×103S/cm。
After pretreatment,nickel fibers were modified by chemical oxidation,to prepare polyaniline(PANI)-coated modified nickel fibers for improving the electrical properties of nickel fibers.The effect of dopant type and concentration,stirring rate,and length to diameter ratio of nickel fibers on fiber were investigated.The elements and morphologies of fibers were analyzed by NMR,EDS and SEM.The electrical properties were texted by RTS-8 fourprobe resistivity tester.The results showed that the coating of PANI-coated nickel fibers were dense and uniform when the length to diameter ratio was 8 mm,0.1 mol/L HCl used as dopant,and stirring speed was 60 r/min at 0～5℃.The maximum conductivity of 2.62×103 S/cm was obtained.
After pretreatment,nickel fibers were modified by chemical oxidation,to prepare polyaniline(PANI)-coated modified nickel fibers for improving the electrical properties of nickel fibers.The effect of dopant type and concentration,stirring rate,and length to diameter ratio of nickel fibers on fiber were investigated.The elements and morphologies of fibers were analyzed by NMR,EDS and SEM.The electrical properties were texted by RTS-8 fourprobe resistivity tester.The results showed that the coating of PANI-coated nickel fibers were dense and uniform when the length to diameter ratio was 8 mm,0.1 mol/L HCl used as dopant,and stirring speed was 60 r/min at 0～5℃.The maximum conductivity of 2.62×103 S/cm was obtained.
引文
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[2]Gong C H,Zhang Y,Yan C,e al.Electromagnetic shielding behavior of composites containing ultrafine Ni fibers[J].Rare Metal Materials and Engineering,2010,39(7):1298-1301.
[3]杨晓,赵蔚,贾清秀,等.水泥基纤维复合材料研究进展[J].高分子通报,2013,12(4):21-29.
[4]陈杨如,熊国宣,张志宾.屏蔽介质在水泥基材料中的应用研究[J].新型建筑材料,2010,7(10):80-82.
[5]Hou J X,Liu Z L,Li Y X.Polyaniline modified stainless steel fiber felt for high-performance microbial fuel cell anodes[J].Journal of Clean Energy Technologies,2015,3(3):165-169.
[6]盖新璐,洪晓斌,高宏景.聚苯胺的合成工艺优化及其性能表征[J].广州化工,2016,44(14):95-98.
[7]王香琴,辛斌杰,许鉴.导电聚苯胺的制备及其表征[J].材料导报:研究篇,2013,27(8):86-99.
[8]Manesh F Y,Hasani H,Mortazavi S M.Analyzing the effect of yarn and fabrics parameters on electromagnetic shielding of metalized fabrics coated with polyaniline[J].Journal of Industryial Textiles,2014,44(3):434-446.
[9]顾哲明,张玲,李春忠.用化学方法制备聚吡咯包覆氧化石墨的复合材料[C].上海,亚洲化学大会,2008.
[10]喻冬秀,陈明涛,皮丕辉,等.聚苯胺包覆短碳纤维的制备及电磁性能研究[J].高校化学工程学报,2009,23(1):148-152.
[11]Zhou L,Mao H,Yu A S.PANI-coated partially unzipped vapor-grown carbon fibers/sulfur microsphere composites for Li-S cathodes[J].Journal of Electroanalytical Chemistry,2016,761:62-67.
[12]Shelestova V A,Zhandarov S F,Danchenko S G,et al.Surface modification of carbon fiber by fluoropolymer in a low temperature plasma[J].Inorganic Materials:Applied Research,2015,6(3):219-224.
[13]Kuroki S,Hosaka Y,Yamauchi C.A solid-state NMR study of the carbonization of polyaniline[J].Carbon,2013,55:160-167.
[14]Zoran D.Z,Graham A B,Henry D T,et al.Solid-state NMR of polyaniline nanofibers[J].Synthetic Metals,2009,159(7-8):710-714.
[15]Wei Y S,Huang Z X,Du Z J,et al.Synthesis of BN coatings on carbon fiber by dip coating[J].Surface and Interface Analysis,2017,49(3):177-181.