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1、第42卷第10期塑料工業(yè)CHINAPLASTICSINDUSTRY·21·2014年10月PI/石墨微片半導(dǎo)電復(fù)合薄膜的制備與表征吳雪松。劉立柱,張海軍,翁凌,王誠(1.哈爾濱理工大學(xué)材料科學(xué)與工程學(xué)院,黑龍江哈爾濱150040;2.哈爾濱理工大學(xué)工程電介質(zhì)及其應(yīng)用教育部重點(diǎn)實(shí)驗(yàn)室,黑龍江哈爾濱150080)摘要:通過乙醇超聲處理膨脹石墨的方法制備石墨微片,并用原位聚合法制備聚酰亞胺/石墨微片復(fù)合薄膜;探討了復(fù)合薄膜的結(jié)構(gòu)、微觀形態(tài);討論了石墨微片的含量對(duì)復(fù)合薄膜的體積電阻率、表面電阻率、力學(xué)性能以及熱穩(wěn)定性的影響。結(jié)果表明,石墨微片
2、能夠在聚酰亞胺基體中均勻分布,并對(duì)復(fù)合薄膜亞胺化過程沒有影響,復(fù)合薄膜亞胺化完全。復(fù)合薄膜較純膜力學(xué)性能有所下降,熱穩(wěn)定性提高,在石墨微片質(zhì)量分?jǐn)?shù)為4%時(shí),達(dá)到滲濾閾值,體積電阻率和表面電阻率均可下降到1O數(shù)量級(jí),達(dá)到半導(dǎo)電復(fù)合薄膜的要求。關(guān)鍵詞:聚酰亞胺;石墨微片;復(fù)合薄膜;體積電阻率;表面電阻率DOI:10.3969/j.issn.1005—5770.2014.10.006中圖分類號(hào):TQ323.7文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1005—5770(2014)10—0021—04SynthesisandCharacteristicsofP
3、olyimide/GraphiteMicrochipSemiconductorCompositeFilmWUXue’song,LIULi—zhu,ZHANGHai-jun,WENGLing,WANGCheng(1.CollegeofMaterialsScienceandEngineering,HarbinUniversityofScienceandTechnology,Harbin150040,China;2.KeyLaboratoryofEngineeringDielectricandItsApplication,Ministryo
4、fEducation,HarbinUniversityofScienceandTechnology,Harbin150080,China)Abstract:Thepolyimide/graphitemicrochipcompositefilmwaspreparedbyinsitupolymerization,andthegraphitemicrochipwaspreparedbyethanolsonicatingtheexpandedgraphite.Thestructureandmicro—morphologyofthecompos
5、itefilmwerecharacterized.EffectsofgraphitemicrochipamountOnthesurfaceresistivity,volumeresistivity,themechanicalpropertiesandthethermalperformancewerediscussed.Theresultsshowedthatgraphitemicrochipcanbeuni~rmlydistributedinthepolyimidematrixandtheimidizationwascomplete.
6、Mechanicalpropertiesofcompositefilmweredecreasedbutthethermalstabilitywasimproved,comparedwithpurefilm.Whenmasscontentofthegraphitemicrochipwas4wt%,percolationthresholdwasreached.Thesurfaceresistivityandthevolumeresistivityofthecompositefilmcouldbedownto10Q.whichmetther
7、equirementsofthesemiconductorcompositefilm.Keywords:Polyimide;GraphiteMicrochip;CompositeFilm;SurfaceResistivity;VolumeResistivity聚酰亞胺(PI)是一種新型特種工程塑料,具儀器的測量精度,所以要對(duì)聚酰亞胺進(jìn)行防靜電處有良好的耐熱性、介電性能、耐腐蝕性、力學(xué)性能,理,才能讓聚酰亞胺材料應(yīng)用到更廣闊的領(lǐng)并且制品尺寸穩(wěn)定性高,可以進(jìn)行多種性能改性,一域中-91。直是科學(xué)家們熱衷的改性材料之一ll叫]。聚酰亞胺目前
8、,國內(nèi)外對(duì)聚酰亞胺材料的防靜電處理主要制品在微電子行業(yè)、航空航天、電氣電纜等多個(gè)領(lǐng)域有三種:添加導(dǎo)電填料;與導(dǎo)電高分子共混;表面涂都發(fā)揮著極為重要的作用-5-6]。聚酰亞胺材料的絕覆防靜電涂料_lJ。其中添加導(dǎo)電填料為最