苯基硅氧烷改性TiO_(2)在聚苯硫醚抗紫外中的性能研究  

Study on UV Resistance of Polyphenylene Sulfide Modified TiO_(2) by Phenylsiloxane

作　　者：尤大智 白雅丽[2,3,4] 李振环 Da-zhi You;Yali Bai;Zhen-huan Li(School of Economics and Management,Tiangong University,Tianjin 300387;State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387;School of Materials Science and Engineering,Tiangong University,Tianjin 300387;Institute for Now Energy Materials and Low-Carbon Technologies,Tianjin University of Technology,Tianjin 300382)

机构地区：[1]天津工业大学经济管理学院,天津300387 [2]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387 [3]天津工业大学材料科学与工程学院,天津300387 [4]天津理工大学新能源材料与低碳技术研究院,天津300382

出　　处：《高分子学报》2022年第6期673-682,共10页Acta Polymerica Sinica

基　　金：国家自然科学基金面上基金(基金号21878231);天津市自然科学基金重点项目(基金号19JCZDJC37300);山东省自然科学基金重点项目(基金号ZR2020KE053)资助.

摘　　要：首先以苯基三乙氧基硅烷(PTES)为改性剂,采用凝胶-溶胶法对金红石型TiO_(2)进行表面化学修饰,制备了抗紫外TiO_(2)/PTES纳米粒子.然后通过对TiO_(2)/PTES纳米粒子的系统表征,发现PTES的载入显著地抑制了TiO_(2)的光催化性能.最后将抗紫外性能优异的TiO_(2)/PTES-2纳米粒子以不同比例加入PPS中,制备了PPS复合薄膜,探讨了纳米粒子的添加对PPS抗紫外老化性能的影响.结果表明,当TiO_(2)/PTES-2纳米粒子的添加量为2.0 wt%时,PPS抗紫外性能达到最佳,即TiO_(2)/PTES-2/PPS复合薄膜紫外辐射192 h后的断裂强度保留率和断裂伸长保留率分别为93.75%和94.00%.Polyphenylene sulflde(PPS)possesses the excellent heat resistance,flame resistance,chemical resistance and good mechanical properties.However,the poor UV-resistance properties of PPS are an important obstacle for PPS usage in some high-end areas.In this study,TiO_(2)/phenyltriethoxysilane(PTES)nanoparticles were prepared from PTES and TiO_(2) by sol-gel method,and a series of characterizations were employed to investigate TiO_(2)/PTES nanoparticles.Furthermore,TiO_(2)/PTES/PPS composite films with different nanoparticle doping amounts were prepared.The effects of TiO_(2)/PTES nanoparticles on PPS UV resistance were investigated,and it was found that the loading of PTES realized benzene functionalization on the surface of TiO_(2) nanoparticles and that TiO_(2)/PTES nanoparticle can effectively suppress the photocatalytic activity in comparison with TiO_(2).After 192 h of UV radiation,the physicochemical structure of TiO_(2)/PTES/PPS composite film did not change,and even the color of composite film did not significantly deepen or turn yellow.When 2.0 wt% of TiO_(2)/PTES nanoparticles were introduced into PPS matrix,the optimal ultraviolet resistant properties of composite films were achieved,and the stress strength retention rate and breaking elongation retention rate after UV irradiation 192 h were 93.75% and 94.00%,respectively.Herein,our UV-resistance method can pave the way toward the application of PPS in the field of extreme environment.

关 键 词：聚苯硫醚 苯基硅氧烷 二氧化钛 抗紫外 光催化 

分 类 号：TQ317[化学工程—高聚物工业]