資源描述：
《RGO的制備及其對(duì)PMMARGO復(fù)合材料介電性能的影響.pdf》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、第42卷，第7期工程塑料應(yīng)用Vo1．42，No．711Ju1．2O14ll2O14年7月ENGINEERINGPLASTICSAPPLICAT10Ndoi：lO．39690．issn．1001-3539．2014．07．003RGO的制備及其對(duì)PMMA／RGO復(fù)合材料介電性能的影響曾小鵬，張麗珍，袁文霞(北京科技大學(xué)化學(xué)與生物工程學(xué)院，北京100083)摘要：以氧化還原法為基礎(chǔ)制備了兩種非改性的還原氧化石墨烯(RGO)：水合肼還原制備的RGO(RGO-N)和水合肼還原后真空退火制備的RGO(RGO-V)，之后以這兩種RGO和聚甲基丙烯酸甲酯(PMMA)為原料通過簡(jiǎn)單溶液復(fù)合法制備了PMMA／
2、RGO復(fù)合材料。通過透射電子顯微鏡、原子力顯微鏡和X射線光電子能譜對(duì)兩種RGO的形貌和結(jié)構(gòu)進(jìn)行了表征。結(jié)果表明，這兩種RGO都為單層或少數(shù)幾層的片狀結(jié)構(gòu)，其中RGO—V的導(dǎo)電性高于RGO-N，且其厚度低于RGO-N。通過掃描電子顯微鏡對(duì)PMMA／RGO復(fù)合材料的斷面形貌進(jìn)行了表征，發(fā)現(xiàn)RGO能均勻地分散在PMMA中并且與PMMA有明顯的界面相互作用。進(jìn)一步研究了不同RGO含量下制備的PMMA／RGO復(fù)合材料介電性能的變化。結(jié)果表明，兩種RGO均能提高復(fù)合材料的介電常數(shù)；且隨著RGO含量的增加，復(fù)合材料的介電常數(shù)明顯增大，而介電損耗變化不大。在室溫及1000Hz下，當(dāng)RGO—V體積分?jǐn)?shù)為2．7
3、5％時(shí)，PMMA／RG0一V復(fù)合材料的介電常數(shù)為20．5，是純PMMA的的5倍，是相同RGO含量下PMMA／RGO-N復(fù)合材料的2．5倍，而介電損耗僅為0．80。關(guān)鍵詞：石墨烯；聚甲基丙烯酸甲酯；復(fù)合材料；介電性能中圖分類號(hào)：TB332文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1001．3539(2014)07．0011．05PreparationofReducedGrapheneOxideandItsEffectivenesstoDielectricPropertiesOfPMMAZengXiaopeng，ZhangLizhen，YuanWenxia(SchoolofChemistryandBiologic
4、alEngineering，UniversityofScienceandTechnologyBeijing，Beijing100083，China)Abstract：Twokindsofnon．modifiedreducedgrapheneoxide(RGO)basedonoxidation．reductionmethod：RGO-NonlyreducedbyhydrazinehydrateandRGO—Vreducedbyhydrazinehydrateplusannealinginvacuum．Thenpoly(methylmethacrylate)(PMMA)／RGOcomposite
5、swerefabricatedwithasimplesolutionblendingmethodsbyusingthistwokindsofRGOandPMMA．ThemorphologiesandstructuresofthetwokindsofRGOwerecharacterizedbyTEM，AFMandXPS．TheresultsshowthatthetwokindsofRGOallconsistofsinglelayerorfewlayersgraphene．theconductivityofRGOVishigherthanthatofRGO-NandthethicknessofR
6、GO—VisthinnerthanthatofRGO-N．ThefractureappearancesofthePMMA／RGOcompositeswereinvestigatedbySEManditwasfoundthatthetwokindsofRGOcandispersewellinPMMAmatrixandbehaveevidentinteractionwithPMMA．ThedielectricpropertiesofPMMA／RG0compositeswithdifferentRGOcontentwerefurtherstudied．Theresultsindicatethatt
7、hetwokindsofRGOcanbothimprovethedielectricconstantofthecomposites．WithincreasementofRGOcontent，thedielectricconstantbecomehigherandthedielectriclossisstilllow．At1000Hzandroomtemperature．whenthevolumefractio
