功能材料
功能材料
공능재료
JOURNAL OF FUNCTIONAL MATERIALS
2012年
13期
1789-1792
,共4页
张姗%王成国%袁华%于美杰%林雪%高晓冬
張姍%王成國%袁華%于美傑%林雪%高曉鼕
장산%왕성국%원화%우미걸%림설%고효동
碳化纤维%氟碳树脂%表面电阻率%静电耗散材料%抗静电
碳化纖維%氟碳樹脂%錶麵電阻率%靜電耗散材料%抗靜電
탄화섬유%불탄수지%표면전조솔%정전모산재료%항정전
carbonaceous fibers%fluorocarbon resin%surface resistivity%static dissipative material%antistatic
制备了一种以氟碳树脂为基体,聚丙烯腈(PAN)基短切碳化纤维为导电填料的抗静电复合涂层。讨论了纤维的含量、长度、涂层厚度及外加电压对涂层表面电阻率的影响。结果表明表面电阻率和碳化纤维质量分数之间的关系符合逾渗理论,当纤维长度为4mm时,此体系的渗滤阈值为2.5‰(质量分数),其表面电阻率为10^6Ω,具有良好的抗静电性能;表面电阻率随纤维长度的增加而降低,但降低的程度愈来愈小;涂层厚度在不超过134μm的情况下,对表面电阻率的影响较小;涂层的表面电阻率在高外加电压下较低外加电压下小;碳化纤维/氟碳树脂复合涂层的导电机理是由导电通道、隧道效应和场致发射3种导电机理竞相作用的结果。
製備瞭一種以氟碳樹脂為基體,聚丙烯腈(PAN)基短切碳化纖維為導電填料的抗靜電複閤塗層。討論瞭纖維的含量、長度、塗層厚度及外加電壓對塗層錶麵電阻率的影響。結果錶明錶麵電阻率和碳化纖維質量分數之間的關繫符閤逾滲理論,噹纖維長度為4mm時,此體繫的滲濾閾值為2.5‰(質量分數),其錶麵電阻率為10^6Ω,具有良好的抗靜電性能;錶麵電阻率隨纖維長度的增加而降低,但降低的程度愈來愈小;塗層厚度在不超過134μm的情況下,對錶麵電阻率的影響較小;塗層的錶麵電阻率在高外加電壓下較低外加電壓下小;碳化纖維/氟碳樹脂複閤塗層的導電機理是由導電通道、隧道效應和場緻髮射3種導電機理競相作用的結果。
제비료일충이불탄수지위기체,취병희정(PAN)기단절탄화섬유위도전전료적항정전복합도층。토론료섬유적함량、장도、도층후도급외가전압대도층표면전조솔적영향。결과표명표면전조솔화탄화섬유질량분수지간적관계부합유삼이론,당섬유장도위4mm시,차체계적삼려역치위2.5‰(질량분수),기표면전조솔위10^6Ω,구유량호적항정전성능;표면전조솔수섬유장도적증가이강저,단강저적정도유래유소;도층후도재불초과134μm적정황하,대표면전조솔적영향교소;도층적표면전조솔재고외가전압하교저외가전압하소;탄화섬유/불탄수지복합도층적도전궤리시유도전통도、수도효응화장치발사3충도전궤리경상작용적결과。
A kind of antistatic coating was prepared with fluorocarbon resin as matrix, polyacrylonitrile (PAN)- based short carbonaceous fibers as conductive filler. The influences of fiber content, fiber length, coating thick- ness and applied voltage on the surface resistivity were discussed. The results show that the relationship be- tween surface resistivity and mass fraction of carbonaceous fiber was suitable for percolation theory, and the percolation threshold is 2.5wt‰ when the length was 4mm; the coating has a surface resistivity of about 10^6Ω, and have a good antistatic function; surface resistivity decreases with increasing fiber length, but the extent ta- per off gradually; and yet, the thickness which is less than 134μm has little impact on it; surface resistivity was smaller in high applied voltage compared with low voltage. The conductive mechanism of the coating mainly de- pends on conductive path theory, tunneling effect and field mission.