叶霖,张阳,周思汝,张宏伟

• 1:天津工业大学环境科学与工程学院
• 2:天津大学环境科学与工程学院

摘要(Abstract)：

本研究针对超滤膜亲水改性过程中添加剂的稳定性问题,选取3种常用双亲性嵌段共聚物(PluronicF127、F68、P85)作为研究对象,探索添加剂分子结构对其析出行为及膜材料长期抗污染性能的影响机制。实验利用表面接触角测量仪、ATR—FT-IR等手段评价了不同浸泡周期下膜中添加剂赋存含量的变化情况;利用Langmuir和Freundlich等温吸附方程考察了添加剂析出过程中超滤膜对特定污染物吸附行为及不可逆污染指数的变化特征。实验结果表明,当添加剂中亲水性EO链段较多时,其初期亲水改性效果较好,但在膜材料中的长期稳定性不足,易导致膜材料后期不可逆污染阻力升高;反之,当添加剂中疏水PO链段较多时,其与聚合物分子间存在相对较强的疏水相互作用,能够有效提高添加剂在膜材料中的稳定性,保证膜材料的长期抗污染性能。

关键词(KeyWords)： 膜分离;膜污染;吸附;双亲性共聚物;亲水改性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金青年科学基金项目(No.51808388);; 中国博士后科学基金面上项目(No.2018M641657)

作者(Author): 叶霖,张阳,周思汝,张宏伟

DOI: 10.16026/j.cnki.iea.2019060481

参考文献(References)：

• [1] Fiksdal L, Leiknes T. The effect of coagulation with MF/UF membrane filtration for the removal of virus in drinking water[J]. Journal of Membrane Science, 2006, 279(1):364-371.
• [2] Xiafu Shi, Galit Tal, Nicholas P Hankinsa, et al. Fouling and cleaning of ultrafiltration membranes:A review[J]. Journal of Water Process Engineering, 2014, 1(4):121-138.
• [3] Jianliang Shen, Qi Zhang, Qiu Yin, et al. Fabrication and characterization of amphiphilic PVDF copolymer ultrafiltration membrane with high anti-fouling property[J]. Journal of Membrane Science, 2017, 521(9):95-103.
• [4] Awanis Hashim N, Fu Liu, Li K. A simplified method for preparation of hydrophilic PVDF membranes from an amphiphilic graft copolymer[J]. Journal of Membrane Science, 2009,345(1):134-141.
• [5] Yanqiang Wang, Ting Wang, Yanlei Su, et al. Remarkable reduction of irreversible fouling and improvement of the permeation properties of poly(ether sulfone)ultrafiltration membranes by blending with pluronic F127[J]. Langmuir, 2005, 21(25):11856-11862.
• [6] Dongming He, Heru Susanto, Mathias Ulbricht. Characteristics, performance and stability of polyethersulfone ultrafiltration membranes prepared by phase separation method using different macromolecular additives[J]. Journal of Membrane Science, 2009, 327(1):125-135.
• [7] Yunren Qiu, Hideto Matsuyama, Guoying Gao, et al. Effects of diluent molecular weight on the performance of hydrophilic poly(vinyl butyral)/pluronic F127 blend hollow fiber membrane via thermally induced phase separation[J]. Journal of Membrane Science, 2009,338(1):128-134.
• [8] Chunhui Du, Chunjin Wu, Liguang Wu. Effects of pluronic F127 on the polymorphism and thermoresponsive properties of PVDF blend membranes via immersion precipitation process[J]. Journal of Applied Polymer Science, 2012, 124(S1):330-337.
• [9]张海珍.双亲性聚合物共混PVDF超滤膜及其抗蛋白质污染的研究[D].硕士学位论文,西安:西安建筑科技大学, 2014.
• [10] Mingrui He, Xiaochen Fan, Zhen Yang, et al. Antifouling high-flux membranes via surface segregation and phase separation controlled by the synergy of hydrophobic and hydrogen bond interactions[J]. Journal of Membrane Science, 2016, 520(8):814-822.
• [11] Salehi E, Madaeni S S. Adsorption of humic acid onto ultrafiltration membranes in the presence of protein and metal ions[J]. Desalination, 2010, 263(1/2/3):139-145.
• [12] Heru Susanto, Mathias Ulbricht. Influence of ultrafiltration membrane characteristics on adsorptive fouling with dextrans[J]. Journal of Membrane Science, 2005, 266(1):132-142.