透明導(dǎo)電聚苯胺膜的研究.pdf

1、浙江大學(xué)碩士掌位論文摘要相對于其它共軛高分子而言，聚苯胺原料價廉易得，合成簡單，具有較高的電導(dǎo)率，熱穩(wěn)定性等特點，是東：具應(yīng)用前景的導(dǎo)電高分子之一。聚苯胺由于在可見光范圍內(nèi)有一透過窗口，因而可用做透明導(dǎo)電材料。本文以聚苯胺為研究體系，圍繞如何制備高透明、高導(dǎo)電性能的聚苯胺膜進(jìn)行了以下五個方面的研究。一、，(1)高溶解性能導(dǎo)電聚奉胺的研制。f以DBSAHCI為復(fù)合摻雜劑，采用乳液聚合的方法合成溶解性能良好電導(dǎo)率較高的聚苯胺。傳統(tǒng)的乳液聚合

2、制備可溶性導(dǎo)電聚苯胺只是以DBSA做見化劑和摻雜劑，不適于制備透明導(dǎo)電膜。XPS研究發(fā)現(xiàn)DBS一與c1’之間存在競爭摻架反應(yīng)，HCl和DBSA共同提供反應(yīng)和摻雜所需的質(zhì)子，而由DBSA提供對陰離子。以CSAHC]為摻雜劑存在同樣的現(xiàn)象。當(dāng)反應(yīng)體系的pH控制在06，DB：；A／加控制在05075時，所制備的聚苯胺膜導(dǎo)電性、透光性較好。8)，、＼(2)溶劑對聚苯胺性能的影口；。學(xué)察了溶劑對PANT—DBSA性能的影響。發(fā)現(xiàn)間甲酚可在很大程度

3、上提高聚苯肫的導(dǎo)電性能。uV—ViS研究表明，間甲酚使聚苯胺分子鏈在溶液中較為舒展，亮且當(dāng)溶劑除去后，這種相對舒展的結(jié)構(gòu)會褥以保持，因此電導(dǎo)率較高。當(dāng)間甲酚瀋氯仿的體積比達(dá)到l：l時，是制備透明導(dǎo)電聚苯胺膜的最佳條件。所得聚苯勝膜的方電阻可達(dá)30102，同時透光率達(dá)85％以上。)(3)高透明及高導(dǎo)電性能榮寺胺膜的制備?？疾炝司郾桨放c幾種透明高聚物如PⅢA、PS、EVA共混物的導(dǎo)電性能和聚苯胺百分含量的關(guān)系。在PANI—DBSA的百分含量

4、在2％左右便可觀察到聚摹胺的導(dǎo)電性，而且隨聚苯胺含量的增加，導(dǎo)電性能的變化比較平緩。有高電導(dǎo)，低含量的特性。所制得的透明導(dǎo)電聚苯胺復(fù)合膜的透明性、導(dǎo)電性和純聚苯胺噤相當(dāng)。)／(4)透明導(dǎo)電聚苯胺膜的罟Ii、性能：／所得的純聚苯胺和聚苯胺共混物膜有較好的熱穩(wěn)定性。在j50。C以前共瓶：物中卣聚苯胺所形成的導(dǎo)電網(wǎng)絡(luò)可穩(wěn)定存在，導(dǎo)電性能基本保持不變。在150。C以上，聚苯胺發(fā)生脫摻雜，聚苯胺復(fù)合膜和純聚苯胺膜的導(dǎo)電性能都急劇下驏聚苯胺共混物膜

5、的耐水性較純聚苯胺膜大大提浙江大學(xué)碩&學(xué)位論文————————————————————————————————————一AbstractcomDaredtootherconductingpolymer，Polyanilinehasmanyadvantagessuchasshighconductivity，goodstability，lowpriceandeasypolymerizationandhencewasrecognizedaso

6、neofthemostpotentialconductingpolymerforpracticaluseDuetoitstransmissionwindowatabout600nmitcanbeusedastransparentandconductingmaterialsThispapercentersoilthemethodofpreparinghighlyconductiveandtransparentfilmsbasedonpol

7、yanilineandwasinvolvedofthetollowingstudies：(1)thepreparationofhighsolubleconductivepolyaniline(2)Solventeffectonthepropertiesofpolyaniline(3)Thepreparationofhighlyconductiveandtransparentpolyanilinefilms(4)Theproperties

8、oftransparentandconductivepolyanilinefilmsHighsolubleconductivepolyanilinewassynthesizedthroughemulsionpolymerizationinthecoexistingsystemofDBSAandHCIXPSstudyshowedthattherewascompetitivebehaviorbetweenSDB‘a(chǎn)ndCITheHwaspr

9、ovidedbyDBSAandHCltogether，whileDBSAprovidedcounterionscombinedwithpositivelychargedpolyanilinechainThecompetitivebehaviorwasalsofoundwithCSAandHCIcoexistingsystemasdopantsWhenthepHofthereactionsystemis06，andtheratioofDB

10、SAtoAnis05—075，highlytransparentandconductivepolyanilinefilmscanbeobtainedSolventeffectoilcnepropertiesofpolyaniltoewasstudiedItwasfoundthatmcresolcanenhancetheconductivityofPANIDBSAcomplexUV—Visstudyshowedthatpolyanilin

11、echainbecamemoreexpandedduetotheexistenceofmcresolandtheexpandedcoilstructurecanberemainedevenwhenmcresolWB8removedSotheconductivityishighTheoptimumconditiontofabricatehighlytransparentandconductivepolyanilinefilmsiswhen

12、theratioofmcresoltochloroformis1：1Thesurfaceresistanceofaspreparedpolyanilinefilmscanbe2600hm／sqcombinedwithtransparenceof85％PolyanilineblendswithtransparentpolymersuchasPMMA，PS，EVAwerefabricatedthroughCOsolventTherelati

13、onshipofconductivityofpolyanilineblendswiththepercentcontentofpolyanilineWasstudiedConductivitycanbeobservedwhenthePANIDBSApercentcontentisonly2％Besides，withtheincreaseofPANIDBSAcontenttheconductivityofpolyanilineblendsi