摘要
为了改善聚偏氟乙烯(PVDF)的亲水性和力学性能,将UiO-66与PVDF共混,采用溶液致相分离法制得共混超滤膜;考察了不同含量的UiO-66纳米粒子对PVDF超滤膜的纯水通量、亲水性、截留率、力学性能等的影响,并利用扫描电子显微镜观察超滤膜的形貌,通过X射线衍射仪表征了UiO-66在超滤膜中的存在状态和晶体结构,通过拉伸测试仪和接触角测量仪分别表征了超滤膜的力学性能和膜表面的亲水性。结果表明:在UiO-66的质量分数为1.67%时,膜的性能最优,与原膜相比,纯水通量提高了6倍,约达到120 L/(m^2·h);对BSA的截留率提高了11.53%,约达到95.16%;水接触角降低了24°,达到68°;拉伸强度提高了2.2倍,约为4.13 Mpa。
In order to improve the hydrophilicity and mechanical properties of polyvinylidene fluoride (PVDF),UiO-66 was blended with PVDF,and a blended ultrafiltration membrane was prepared by solution-induced phase separation.The effects of different content of UiO-66 nanoparticles on the pure water flux,hydrophilicity,retention rate and mechanical properties of PVDF ultrafiltration membrane were investigated.The morphology of the ultrafiltration membrane was analyzed by scanning electron microscopy.The diffractometer characterizes the existence state and crystal structure of UiO-66 in ultrafiltration membrane.The mechanical properties of the ultrafiltration membrane and the hydrophilicity of the membrane surface are characterized by tensile tester and contact angle measuring instrument.The results show that when the content of UiO-66 is 1.67%,the performance of the membrane is optimal.Compared with the original membrane,the pure water flux is increased by 6 times (about 120 L/(m^2·h)),the retention rate of BSA is increased by 11.53%(reaches 95.16%),and the water contact angle is reduced by 24°(reaches 68°),the tensile strength increased by 2.2 times (about 4.13 MPa).
作者
王薇
张倩
殷艳艳
WANG Wei;ZHANG Qian;YIN Yan-yan(State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin Polytechnic University,Tianjin 300387,China;School of Material Science and Engineering,Tianjin Polytechnic University,Tianjin 300387,China;College of Environmental Science and Engineering,Nankai University Binhai College,Tianjin 300270,China)
出处
《天津工业大学学报》
CAS
北大核心
2019年第4期18-23,共6页
Journal of Tiangong University
基金
国家重点研发计划资助项目（2016YFC0400509）,国家重点研发计划资助项目（2016YFC0400503）
