SiO2纳米复合材料的影响.pdf

《SiO2纳米复合材料的影响.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、物理化学学报(WuliHuaxueXuebao)ActaPhys．一Chim．Sin．，2010，26(3)：643—648643March【Article】www．whxb．pku．edu．cn扯溶剂对超临界CO2注入技术制备聚丙烯／SiO2纳米复合材料的影响，、张爱琴颜蔚z，施立群。施利毅，，方建慧金鹿江(上海大学理学院，上海200444；上海大学纳米科技与技术研究中心，上海200444；。复旦大学现代物理研究所，上海200433)摘要：采用超临界CO注入技术制备聚合物一无机纳米粒子复合材料，以乙醇

2、作为共溶剂，在超临界co中将正硅酸乙酯(TEOs)注入到聚丙烯(PP)中，重点研究共溶剂乙醇对TEOS在PP中注人率的影响．实验结果表明注入率随着共溶剂加入先增加后减小．同时研究了在共溶剂的存在下其他实验条件对注入率的影响．并采用卢瑟福背散射能谱法(RBs)分析了聚丙烯，siO纳米复合材料的注入元素深度分布，发现si元素在PP中的浓度分布不均匀，随着深度的增加而减小．关键词：共溶剂；超临界CO；注入；聚丙烯；复合材料中图分类号：0647SynthesisofPOlypr0pylene，SilicaHyb

3、ridMaterialsbySupercriticalCOzImpregnationUsingaCo-SolventZHANGAi—QinYANWei，SHILi—Qun。SHILi—Yi。，FANGJian-HuiJINLu-Jiang。fCollegeofScience,ShanghaiUniversity,Shanghai200444，P．R．China；2ResearchCenterofNanoscienceandNanotechnology,ShanghaiUniversity,Shangha

4、i200444,R．China；31nstituteofModemPsics,FudanUniversity，Shanghai200433，P．R．China)Abstract：Polymer／inorganichybridmaterialswerepreparedbysupercriticalcarbondioxide(scCO2)impregnation．Tetraethylorthosilicate(TEOS)wasinfusedintopolypropylene(PP)stripsinscCO2

5、usingethanolastheco-solvent．Theeffectofthisco—solventonmassuptakewasinvestigated．WefoundthatthemassuptakeofTEOSintoPPstripsincreasedtoamaximumandthendecreasedaftertheadditionofmoreco—solvent．Theeffectsofotherimpregnationconditionsonthemassuptakewerealsoi

6、nvestigatedwithusingethano1．Moreover，thedepthprofileoftheinfusedelementsinsidethepolymer／inorganichybridmaterialwasobtainedbyRutherfordbackscatteringspectrometry(RBS)．TheRBSspectrumdemonstratedthattheconcentrationofSiinthePPstripswasnotuniformanddecrease

7、dwithinfusiondepth．KeyWords：Co—solvent；Supercriticalcarbondioxide；Impregnation；Polypropylene；HybridmaterialInrecentyears，thesynthesisofpolymer／inorganichybridma—posedtoachievethedesiredmaterialperformance[a-~．Sol—gelre—terialshasbecomethesubjectofextensi

8、vestudies-4]．Thesema—actionisnowemployedasthegeneralmethodtoobtaintheterials，combiningthepropertiesofeachcomponent，aresup—polymer／inorganichybridmaterials．Duringthesol—gelprocess，Received：August28，2009；Revised：December15，2