膜科学与技术

Ti3C2Tx-MXene掺杂薄层复合纳滤膜的制备及其性能研究

作者：张弦，吴铭榜，杨熙，杨静，徐志康

单位：浙江省吸附分离材料与应用技术重点实验室，浙江大学高分子科学与工程学系，杭州 310027

关键词：纳滤膜；MXene；界面聚合；聚酰胺

出版年,卷(期):页码： 2020,40(1):8-15

摘要：

通过氟化锂/稀盐酸刻蚀钛碳化铝合成单层二碳化三钛(Ti3C2Tx)纳米片，进而采用界面聚合方法制备一种MXene (Ti3C2Tx)掺杂的聚酰胺(PA)薄层复合纳滤膜，并对其渗透分离性能进行研究。以哌嗪(PIP)、Ti3C2Tx混合分散液作为水相、均苯三甲酰氯(TMC)的正己烷溶液作为有机相，在聚醚砜(PES)超滤膜支撑层上进行界面聚合，获得Ti3C2Tx掺杂的薄层复合纳滤膜。对Ti3C2Tx掺杂的薄层复合纳滤膜的微观结构、化学成分、表面润湿性、表面电荷特征进行详细的测试与表征，并考察了Ti3C2Tx掺杂量对复合纳滤膜表面微观结构和分离性能的影响。结果表明，聚酰胺皮层中Ti3C2Tx的掺杂增加了膜表面的粗糙度，降低了聚酰胺皮层的厚度，提高了膜表面的亲水性及负电性，并在硫酸钠盐截留率保持98%的同时提高了纳滤膜的纯水通量。

In this work, the Ti3C2Tx-doped thin film nanocomposite (TFN) membranes were prepared through interfacial polymerization used trimesoyl chloride (TMC) as organic phase monomer and Ti3C2Tx dispersion in piperazine (PIP) as aqueous phase monomer on the polyether sulfone (PES) UF substrates. It can be found that the roughness, hydrophilicity and electronegativity were greatly improved compared with that of TFC membrane without Ti3C2Tx, in addition, the water flux of the TFN membrane was improved by 25% resulting from the reduced skin layer thickness and the improved hydrophilicity while the rejection for Na2SO4 was remaining at 98%.

第一作者简介：张弦（1996-），女，浙江宁波人，在读硕博连读生，研究方向为聚合物分离膜及其表界面工程. *通讯作者，E-mail：xuzk@zju.edu.cn

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