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时间:2020-03-26
《多巴胺改性二氧化钛复合膜光阻隔性研究.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、第44卷,第6期工程塑料应用Vol.44,No.6262016年6月ENGINEERINGPLASTICSAPPLICATIONJun.2016doi:10.3969/j.issn.1001-3539.2016.06.006PVDF/多巴胺改性二氧化钛复合膜光阻隔性研究1,221,21,222李同兵,刘向东,高秀梅,纪凡策,熊征荣,杨宇明(1.中国科学院大学,北京100049;2.中国科学院长春应用化学研究所,长春130022)摘要:制备了表面包覆聚多巴胺层的二氧化钛(TiO2@PDA)复合粒子,并采用溶液刮涂法制备了聚偏氟乙烯(PV
2、DF)/TiO2和PVDF/TiO2@PDA复合膜。利用傅立叶变换红外光谱仪、X射线光电子能谱仪、透射电子显微镜表征了复合粒子的结构,利用紫外–可见光分光光度计、对比率仪表征了复合膜的紫外–可见光阻隔性。结果表明,PVDF/TiO2复合膜对紫外光具有优异的阻隔性,但对可见光的阻隔性(即不透明度)随TiO2含量增加而先增加后不变,PVDF/TiO2@PDA复合膜的不透明度则随TiO2@PDA含量的增加而单调增大。当薄膜厚度为20μm,TiO2体积分数为10%时,PVDF/TiO2复合膜对比率(CR)值为92.8%,小于完全不透明临界值9
3、8%,而PVDF/TiO2@PDA(多巴胺处理20min)复合膜CR值为98.39%。一定TiO2浓度下,随着多巴胺处理TiO2时间的增大,复合膜达到完全不透明所需的薄膜厚度逐渐减小。关键词:多巴胺;二氧化钛;聚偏氟乙烯;紫外–可见光;不透明度中图分类号:TQ050.4+3文献标识码:A文章编号:1001-3539(2016)06-0026-06StudyonUV-VisLightShieldingPerformanceofPVDFBasedDopamineCoatedTitaniumDioxideCompositeFilms1,22
4、1,21,222LiTongbing,LiuXiangdong,GaoXiumei,JiFance,XiongZhengrong,YangYuming(1.UniversityofChineseAcademyofSciences,Beijing100049,China;2.ChangchunInstituteofAppliedChemistry,ChineseAcademyofSciences,Changchun130022,China)Abstract:Poly(dopamine)coatedtitaniumdioxide(TiO2
5、@PDA)hybridparticlesandPVDF/TiO2,PVDF/TiO2@PDAcompositefilmswerepreparedbycastingmethod.Thestructure,morphology,andpropertiesofTiO2@PDAhybridparticlesandcompositefilmswereinvestigatedbyFTIR,XPS,TEM,UV/VISspectrophotometerandcoveringpowermeter.TheresultsshowedthattheUVsc
6、reenpropertyofbothkindsofcompositefilmwasexcellent.Astothevisiblelightblockingproperties,forthePVDF/TiO2compositefilms,theopacityincreasedfirstandkeptunchangedastheTiO2concentrationincreased,however,theopacityofPVDF/TiO2@PDAcompositefilmsincreasedmonotonicallyasthefract
7、ionofTiO2@PDAincreased.Thecontrastratio(CR)ofthePVDF/TiO2filmwith20μmthicknessand10vol%TiO2was92.8%,lowerthanthecriticalCR98%foracompleteopacity,however,theCRofPVDF/TiO2@PDAcompositefilmswas98.39%asthereactiontimebetweenTiO2anddopaminewas20min.AtafixedTiO2concentration,
8、asthethicknessofPDAcoatinglayerincreased,thefilmthicknessofthecompositefilmnecessarytoachievecompletelyopaqued
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