膜科学与技术

基于RTIPS-NIPS法制备含辣素衍生结构防污超滤膜及其性能研究

作者：单超越，张丽丽，唐媛媛，王言建，徐丽，于良民

单位： 1 中国海洋大学海洋化学理论与工程技术教育部重点实验室，青岛 266100；2 中国海洋大学海洋高等研究院，青岛 266100

关键词：反相热诱导相分离法;非溶剂诱导相分离法;辣素衍生物;超滤膜;防污

出版年,卷(期):页码： 2020,40(3):37-46

摘要：

研究采用原位聚合法，将含辣素衍生结构功能单体N-(2-羟基-3-甲基-6(甲硫基)苄基)丙烯酰胺(HMMBA)通过物理共混引入铸膜液中，并通过反相热诱导相分离法与非溶剂诱导相分离法联用(RTIPS-NIPS)进行高通量防污超滤膜的制备。系统考察了HMMBA含量对膜的结构形态、亲水性、分离性能和抑菌性能等的影响。结果表明，当HMMBA添加量达到2 wt%时，超滤膜的接触角由PSf膜的85°降低至62o；机械强度由29.46 N增加至31.71 N；以5 mg/L的腐殖酸为料液进行过滤实验时，改性超滤膜的稳定通量为420 L/(m2h)，与未改性PSf膜[200 L/(m2h)]相比提高了110%；抑菌率达到了97%以上，且通量恢复率由67.59%提升至86.34%。因此，采用RTIPS-NIPS联用将HMMBA应用在超滤膜中可以既可以提高膜的亲水性、机械性能和分离性能，同时还能够有效抑制膜污染的产生。

The high flux antifouling PSf ultrafiltration membranes was prepared via the combination of Reversed thermally induced phase separation and Non-solvent induced phase separation process and N- [2-hydroxy-3-methyl-6 (methanyl) benzyl] acrylamide (HMMBA) was incorporated into the membranes by “in-situ polymerization-blending” method. The effect of HMMBA content on the membrane structure, hydrophilicity, separation performance and antifouling properties was systematically investigated in the work. The results showed that, compared with the pure PSf membrane, when the HMMBA reached 2 wt%, the contact Angle of the ultrafiltration membrane decreased from 85° to 62°; mechanical strength increased from 29.46 N to 31.71 N; the stable flux of the modified ultrafiltration membrane was 418.5 L/(m2h), 110% higher than that of the unmodified PSf membrane [201.3 L/(m2h)]. In addition, the inhibition rate was above 97%, and the flux recovery rate increased from 67.59% to 86.34%. Therefore, the application of HMMBA in ultrafiltration membrane with RTIPS-NIPS can not only improve the hydrophilicity, mechanical properties and separation properties of the membrane, but also effectively achieve a good effect in inhibiting the generation of membrane pollution.

作者简介：单超越，1994年，女，山东威海，硕士，主要从事含辣素衍生结构超滤膜改性研究。E-mail：1097517393@qq.com

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