TiO2共混丝朊接枝聚丙烯腈过滤膜制备及性能研究  

Preparation and properties of TiO2 blended silk fibroin grafted PAN filtration membrane

作　　者：李淑文 赵孔银[1] 陈康[1] 李金刚[1] 赵磊[1] 王晓磊[1] 魏俊富[1,2] LI Shu-wen;ZHAO Kong-yin;CHEN Kang;LI Jin-gang;ZHAO Lei;WANG Xiao-lei;WEI Jun-fu(State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin Polytechnic University,Tianjin 300387,China;School of Chemical and Chemical Engineering,Tianjin Polytechnic University,Tianjin 300387,China)

机构地区：[1]天津工业大学分离膜与膜过程国家重点实验室,天津300387 [2]天津工业大学化学与化学工程学院,天津300387

出　　处：《材料工程》2020年第3期47-52,共6页Journal of Materials Engineering

基　　金：国家自然科学基金项目(21304037,51708407);天津市应用基础与前沿技术研究计划项目(16JCZDJC37500,17JCQNJC08700,18JCYBJC18100);大学生创新创业训练计划(201710058020,201710058069,201810058122);天津市高等学校创新团队培养计划(TD13-5042)

摘　　要：针对传统高分子过滤膜使用有机溶剂易造成环境污染的问题,以氯化锌水溶液为溶剂,丝朊均相接枝聚丙烯腈,加入纳米TiO2得到铸模液,以水为凝固浴,制备TiO2共混的丝朊接枝聚丙烯腈(SF-g-PAN/TiO2)过滤膜。通过扫描电子显微镜,红外光谱等方法对膜进行表征,研究不同TiO2含量的SF-g-PAN过滤膜的亲水性、抗污染性能、力学性能以及SF-g-PAN/TiO2膜对不同分子量染料的截留。结果表明:随着TiO2含量的增加,膜的力学强度先增大后减小。TiO2含量为1%(质量分数)时,膜的力学和抗污染性能最好;在0.10 MPa下,SF-g-PAN/TiO2膜对于分子量大于660的染料截留率为96%以上,通量达到80 L/(m^2·h)。Using organic solvent in traditional polymer filtration membrane is easy to cause environ-mental pollution.The silk was uniformly grafted with polyacrylonitrile using zinc chloride aqueous sol-ution as the solvent. The nano-TiO2 was blended into the mixture and the casting solution was pre-pared. The TiO2 blended silk fibroin grafted PAN(SF-g-PAN/TiO2) filtration membrane was pre-pared using water as the coagulation bath. The membrane was characterized by scanning electron micr-oscopy and infrared spectroscopy. The hydrophilic, anti-fouling and mechanical properties of SF-g-PAN membranes with different TiO2contents were studied. The rejection performance of dyes with different molecular weight by the SF-g-PAN/TiO2 membrane was investigated. The results show that the mechanical properties of the SF-g-PAN/TiO2 filtration membranes increase firstly and then dec-rease with the increase of TiO2 content. When the content of TiO2 is 1%(mass fraction), the mech-anical and hydrophilic properties of the SF-g-PAN/TiO2 membrane are the best;the rejection of the dyes whose molecular weight is more than 660 is greater than 96%, with the flux of 80 L/(m^2·h) at 0.10 MPa.

关 键 词：丝朊接枝聚丙烯腈 纳米TIO2 抗污染 亲水性 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ319[化学工程—高聚物工业]