化工进展 ›› 2019, Vol. 38 ›› Issue (12): 5427-5434.DOI: 10.16085/j.issn.1000-6613.2019-0378

• 材料科学与技术 • 上一篇    下一篇

辣素衍生物改性PVDF膜的制备及其抗菌性能

申向(),刘开全,刘鹏,姚思杰,吕妮娜,张永金,汪帆   

  1. 曲靖师范学院化学与环境科学学院,云南 曲靖 655011
  • 收稿日期:2019-03-13 出版日期:2019-12-05 发布日期:2019-12-05
  • 通讯作者: 申向
  • 作者简介:申向(1985—),男,博士,研究方向为聚合物分离膜材料。E-mail:sx008100@163.com
  • 基金资助:
    国家自然科学基金(51703118);国家级大学生创新训练计划(201610684007);云南省地方高校联合基金(2017FH001-048)

Preparation and anti-bacterial ability of PVDF membrane modifiedwith capsaicin derivative

Xiang SHEN(),Kaiquan LIU,Peng LIU,Sijie YAO,Nina LÜ,Yongjin ZHANG,Fan WANG   

  1. College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, Yunnan, China
  • Received:2019-03-13 Online:2019-12-05 Published:2019-12-05
  • Contact: Xiang SHEN

摘要:

以甲基丙烯酸甲酯(MMA)和天然辣素8-甲基-N-香草基-6-壬烯酰胺(Capsa)为单体,通过自由基聚合合成辣素衍生物PMMA-Capsa。将PMMA-Capsa与聚偏氟乙烯(PVDF)共混,通过非溶剂诱导相转化法制备PVDF/PMMA-Capsa分离膜,系统地研究了PMMA-Capsa含量对所制备的分离膜表面化学组成、形态结构、亲水性能、抗菌性能及渗透性能的影响。结果表明在成膜过程中PMMA-Capsa倾向于分布在分离膜的表面和孔道表面。随着铸膜液中PMMA-Capsa含量的增加,所制备的分离膜断面结构中海绵层结构逐渐消失,分离膜容易形成粗糙的微孔状表面。PMMA-Capsa的引入使分离膜表面水接触角从88.4°降低到73.1°。渗透实验结果表明分离膜的纯水通量随着PMMA-Capsa含量的增加而增加,而对牛血清蛋白(BSA)的截留率逐渐降低,所制备的PVDF/PMMA-Capsa分离膜的通量恢复率高于纯PVDF膜。PVDF/PMMA-Capsa分离膜具有优异的抗菌性能,对金黄色葡萄球菌的抗菌效率最高可达97.2%。

关键词: 聚合物, 膜, 界面, 混合, 分离, 聚偏氟乙烯, 抗菌活性, 辣素

Abstract:

Capsaicin derivative(PMMA-Capsa) was synthesized via radical copolymerization using methyl methacrylate(MMA) and 8-methyl-N-vanillyl-6-nonenamide (Capsa) as monomers. PMMA-Capsa was blended with PVDF to prepare the PVDF/PMMA-Capsa membrane using non-solvent induced phase inversion method. Effects of PMMA-Capsa concentration on the surface chemical composition, morphology, hydrophilicity, anti-bacterial activities and permeation properties of resultant membranes were investigated systematically. The result showed that the PMMA-Capsa was inclined to distribute onto the membrane surface and pore channel surface during the membrane formation process. With the increase of PMMA-Capsa concentration in the casting solution, the sponge-like structure at the cross-sections of membranes disappeared gradually, and the microporous and rough membrane surfaces were easily formed. The introduction of PMMA-Capsa resulted in the decrease in water contact angle of membrane surface from 88.4° to 73.1°. Filtration experiments indicated that the pure water flux of the membranes increased, whereas the rejection ratio of bovine serum albumin(BSA) decreased with the increment of PMMA-Capsa concentration. The flux recovery ratios of the prepared PVDF/PMMA-Capsa membranes were higher than that of the pristine PVDF membrane. The PVDF/PMMA-Capsa membrane exhibited excellent biofouling resistance and the bactericidal efficiency against S. aureu was as high as 97.2%.

Key words: polymers, membrane, interface, blend, separation, poly(vinylidene fluoride), anti-bacterial activity, capsaicin

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