摘要
基于非溶剂诱导相分离(NIPS)技术,采用苯基笼型倍半硅氧烷(POSS)改性聚偏氟乙烯(PVDF)制备超滤膜,考查苯基POSS类型和掺杂量对超滤膜的影响。通过傅里叶变换红外光谱仪(FTIR)分析膜情况,综合评价改性膜的接触角、吸水性、纯水通量和截留率等分离性能指标。结果显示,相较于纯PVDF超滤膜,掺杂6%的八苯基POSS制备的PVDF超滤膜(M-8-6)和掺杂6%的七苯基POSS制备的PVDF超滤膜(M-7-6)均显著降低了膜的接触角,增强了膜的亲水性;在水分离性能方面,M-7-6纯水通量由66.97 L/(m^(2)·h)增加到248.99 L/(m^(2)·h),BSA截留率由44%提高到76.30%,M-8-6纯水通量达到161.28 L/(m^(2)·h),BSA截留率达到60.10%;抗污染性能方面,M-8-6抗BSA通道恢复率(FRR)由61%提高至76.40%,抗BSA和海藻酸钠(SA)混合液的FRR值由65%提高至76.40%;M-7-6抗BSA的FRR值提高到82.50%,抗BSA/SA的FRR值提高到93.60%。研究表明,掺杂6%不同苯基POSS改性PVDF超滤膜接触角下降、亲水性增强,纯水通量、截留率和抗污性能均得到提高。
The study utilized non-solvent induced phase separation(NIPS)technology to prepare ultrafiltration membranes using phenyl polyhedral oligomeric silsesquioxanes(POSS)modified polyvinylidene fluoride(PVDF).The effects of different types and doping levels of phenyl POSS on the ultrafiltration membranes were investigated.By analyzing the membrane characterization through Fourier Transform Infrared Spectroscopy(FTIR),the separation performance indicators of the modified membranes was comprehensively evaluated,including contact angle,water absorption,pure water flux,and rejection rate.The results showed that compared with pure PVDF ultrafiltration membrane,PVDF ultrafiltration membrane prepared by doping 6%heptaphenyl POSS(M-7-6)and 6%octaphenyl POSS(M-8-6)significantly reduced the contact angle of the membrane and enhanced its hydrophilicity;In terms of water separation performance,the pure water flux of M-7-6 increased from 66.97 L/(m^(2)·h)to 248.99 L/(m^(2)·h),and the BSA rejection rate increased from 44%to 76.30%,and the pure water flux of M-8-6 reached 161.28 L/(m^(2)·h),and the BSA rejection rate reached 60.10%;In terms of anti-pollution performance,the flux recovery ratio(FRR)of M-8-6 anti-BSA channel increased from 61%to 76.40%,and the FRR value of anti-BSA/SA increased from 65%to 76.40%;The FRR value of M-7-6 anti-BSA increased to 82.50%,and the FRR value anti-BSA/SA increased to 93.60%.The studies has shown that doping with 6%different phenyl POSS modifies PVDF ultrafiltration membranes led to a decrease in contact angle,enhanced hydrophilicity,and increase in pure water flux,rejection rate,and anti-fouling properties.
作者
段训威
周涛
徐文涛
DUAN Xunwei;ZHOU Tao;XU Wentao(Institute of Oceanology and Food Science,Quanzhou Normal University,Quanzhou Fujian 362000,China;School of Chemical Engineering and Materials Science,Quanzhou Normal University,Quanzhou Fujian 362000,China;Fujian Province Key Laboratory for the Development of Bioactive Material From Marine Algae,Quanzhou Fujian 362000,China)
出处
《泉州师范学院学报》
2025年第2期10-17,共8页
Journal of Quanzhou Normal University
基金
福建省自然科学基金项目(2023J01899)。
关键词
苯基笼形聚倍半硅氧烷
聚偏氟乙烯
超滤膜
水处理
phenyl polyhedral oligomeric silsesquioxanes(POSS)
polyvinyli dene fluoride(PVDF)
ultrafiltration membrane
water treatment
