摘要
为了提高聚苯硫醚(PPS)膜的亲水性,通过表面涂覆法和表面接枝法对PPS膜进行亲水性改性。利用邻苯二酚(CA)与聚乙烯亚胺(PEI)共沉积在膜表面形成亲水涂层,再通过表面接枝γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)得到了超亲水PPS复合膜,并对其结构组成进行了表征,测定了改性膜的水接触角、纯水通量、抗污染性能和稳定性。研究结果表明:红外光谱分析中改性膜出现了C=N、N—H和C—O—C的吸收峰;XPS分析中改性膜出现了O、N和Si元素的特征峰,这2种分析结果都证明成功制备了超亲水PPS复合膜;改性后的膜的孔径和表面平滑程度都有所下降;与PPS膜相比,超亲水PPS复合膜的上下表面接触角都达到了0°,纯水通量也增加到68 L/(m^2·h),这说明PPS膜的亲水性得到明显改善;复合膜的通量恢复率达到了92.62%,说明复合膜有良好的抗污染性能;复合膜在强酸性(pH=1)和弱碱性(pH=11)环境中保持着良好的稳定性,在强碱性(pH=14)环境中会丧失部分性能。
In order to improve the polyphenylene sulfide(PPS) membrane,hydrophilic modification of PPS membrane was carried out by surface coating method and surface grafting method.A hydrophilic coating was formed on the surface of the membrane by co-deposition of Catechol (CA) and Polyethyleneimine (PEI),and then superhydrophilic PPS composite membrane was obtained by grafting γ-(2,3-epoxypropoxy)propytrimethoxysilane (KH560) onto the surface.The structure and composition of the modified membranes were characterized.The water contact angle,pure water flux,anti-pollution performance and stability of the modified membranes were tested.The results showed that the absorption peaks of C=N,N-H and C-O-C appeared in the modified membranes in FT-IR analysis,and the characteristic peaks of O,N and Si appeared in the modified membranes in XPS analysis.Both of these results proved that the superhydrophilic PPS composite membranes were successfully prepared.The surface smoothness and pore size of the modified membrane decreased.Compared with PPS membranes,the contact angle between the upper and lower surfaces of superhydrophilic PPS composite membranes reached 0°,and the pure water flux increased to 68 L/(m^2·h),which indicated that the hydrophilicity of PPS membranes was improved significantly;the flux recovery rate of the composite membranes reached 92.62%,which indicated that the composite membranes had good anti-pollution performance;the composite membranes maintained good stability in strong acidity(pH=1) and weak alkalinity(pH=11),and lost some properties in strong alkalinity(pH=14).
作者
宋俊
高玙
李振环
程博闻
SONG Jun;GAO Yu;LI Zhen-huan;CHENG Bo-wen(School of Material Science and Engineering,Tianjin Polytechnic University,Tianjin 300387,China;State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin Polytechnic University,Tianjin 300387,China)
出处
《天津工业大学学报》
CAS
北大核心
2019年第4期7-12,共6页
Journal of Tiangong University
基金
天津市自然科学基金资助项目(15JCZDJC37000)
关键词
聚苯硫醚膜
亲水改性
超亲水
抗污染性能
polyphenylene sulfide membrane
hydrophilic modification
superhydrophilic
anti-pollution performance
