高透光率聚酰亚胺的合成及改性研究  

Study on Synthesis and Modification of Polyimide with High Light Transmittance

作　　者：张磊[1,2] 张威星 许并社[1,2] 魏丽乔[1,2] 

机构地区：[1]太原理工大学新材料界面科学与工程教育部重点实验室,山西太原030024 [2]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《塑料科技》2016年第4期43-46,共4页Plastics Science and Technology

摘　　要：首先在自制的聚酰胺酸(PAA)溶液中加入聚酰亚胺(PI)粉末,使用常规升温工艺制备了PI/PAA型复合PI;继而又制备了氧化锌(ZnO)包覆的二氧化钛(TiO_2)颗粒,然后将其添加至复合PI中,得到改性复合PI。采用激光粒度仪(LPS)、X射线衍射仪(XRD)、紫外可见光分光光度计(UV-Vis)和热重分析仪(TG)对改性前后的复合PI进行了表征。结果表明:ZnO很好地包覆于TiO_2颗粒表面,包覆颗粒的粒径集中于150 nm。当PI粉末的添加量为0.4%时,所得复合PI薄膜的透光率最佳,可达62%;采用包覆颗粒对复合PI进行改性后,材料依然具有优异的耐热性能,同时其透光率高达70%。Using heating process, the composite polyimide（PI）, polyimide/polyamic acid（PI/PAA）, was obtained by adding different amounts of PI powder into homemade polyamide acid（PAA） solution. Then the titanium dioxide（TiO2） particles which coated with zinc oxide（ZnO） particles was prepared, and the modified composite PI was prepared by adding the coated particles into composite PI. The composite PI films before and after modification were characterized by using laser particle size analyzer（LPS）, X-ray diffraction（XRD）, UV-visible spectrophotometer（UV-Vis） and thermogravimetric analyzer（TG）. The results show that： TiO2 particles can be well coated with ZnO, and the coated particle size is concentrated in 150 nm; while PI powder dosage is at 0.4 percent, the highest transmittance is up to 62%; after the modification, the heat resistance of the composite PI is still outstanding, while the highest transmittance can reach 70%.

关 键 词：聚酰亚胺 包覆 改性 透光率 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业]