Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China.
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China.
J Colloid Interface Sci. 2017 Jul 15;498:136-143. doi: 10.1016/j.jcis.2017.03.055. Epub 2017 Mar 14.
Polysulfone (PSf) membrane has been widely used in water separation and purification, although, membrane fouling is still a serious problem limiting its potential. We aim to improve the antifouling of PSf membranes via a very simple and efficient method. In this work, antifouling PSf membranes were fabricated via in situ cross-linked polymerization coupled with non-solvent induced phase separation. In brief, acrylic acid (AA) and vinyltriethoxysilane (VTEOS) were copolymerized in PSf solution, then directly casted into membranes without purification. With the increase of monomers concentration, the morphology of the as-cast membranes changed from a finger-like morphology to a fully sponge-like structure due to the increased viscosity and decreased precipitation rate of the polymer solutions. Meanwhile, the hydrophilicity and electronegativity of modified membranes were highly improved leading to inhibited protein adsorption and improved antifouling property. Furthermore, in order to further find out the different roles player by AA and VTESO, the modified membrane without VTEOS was prepared and characterized. The results indicated that AA is more effective in the membrane hydrophilicity improvement, VTEOS is more crucial to improve membrane stability. This work provides valuable guidance for fabricating PSf membranes with hydrophilicity and antifouling property via in situ cross-linked polymerization.
聚砜（PSf）膜已广泛应用于水的分离和净化，但膜污染仍然是限制其应用潜力的一个严重问题。我们旨在通过一种非常简单有效的方法来提高 PSf 膜的抗污染性。在这项工作中，通过原位交联聚合与非溶剂致相分离相结合来制备抗污染 PSf 膜。简而言之，将丙烯酸（AA）和乙烯基三乙氧基硅烷（VTEOS）共聚在 PSf 溶液中，然后直接浇铸成膜，无需纯化。随着单体浓度的增加，由于聚合物溶液的粘度增加和沉淀速率降低，铸膜的形态从指状形态转变为完全海绵状结构。同时，改性膜的亲水性和电负性得到了极大的提高，从而抑制了蛋白质的吸附，提高了抗污染性能。此外，为了进一步探究 AA 和 VTESO 的不同作用，制备并表征了不含 VTEOS 的改性膜。结果表明，AA 更有利于提高膜的亲水性，VTEOS 更有利于提高膜的稳定性。这项工作为通过原位交联聚合制备具有亲水性和抗污染性的 PSf 膜提供了有价值的指导。
