膜科学与技术

位置：首页 >> 期刊内容阅读

基于 BTP/PIP-TMC 界面聚合体系制备高通量复合纳滤膜

作者：王新乐，刘铭辉，于海军，章昭，王聪，康国栋，曹义鸣，付晓燕

单位： 1.中海油能源发展股份有限公司北京安全环保工程技术研究院，天津 300457；2. 中国科学院大连化学物理研究所，大连 116023；3. 辽宁省大连生态环境监测中心，大连 116023

关键词：纳滤膜；界面聚合；1,3-二[三(羟甲基)甲氨基]丙烷；结构调控

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2022,42(2):40-46

摘要：

选择具有良好亲水性和线性结构特征的1,3-二[三(羟甲基)甲氨基]丙烷（BTP）与哌嗪（PIP）共同组成水相单体，与均苯三甲酰氯（TMC）通过界面聚合合成复合纳滤膜。利用ATR/FTIR、SEM和接触角测定仪等手段对合成的复合纳滤膜进行表征，并考察水相单体中BTP含量对纳滤膜渗透分离性能和亲水性的影响。结果表明，BTP被成功引入到聚酰胺分离层中，随着水相单体中BTP含量的提高，聚酰胺分离层厚度和水通量都有所增加，但对无机盐的截留性能下降。最佳的水相组成为：PIP质量分数为0.4 %，BTP质量分数为0.6 %，此时复合纳滤膜的纯水渗透系数为10.5 L/（ m2 h bar），达到原膜的1.54倍，对Na2SO4、MgSO4、MgCl2和NaCl的截留率分别为97.3%、91.4%、40.7%和31.7%。

1, 3-bis [tri (hydroxymethyl) methylamino] propane (BTP) with good hydrophilic and linear structure characteristics and piperazine (PIP) were selected to form aqueous monomer, and the composite nanofiltration membrane was synthesized with homophentriacyl chloride (TMC) through interfacial polymerization. The membrane was characterized by ATR/FTIR, SEM and contact angle analyzer, and the effects of BTP content in aqueous monomer on the permeance and hydrophilicity of nanofiltration membranes were investigated. The results showed that BTP was successfully introduced into the polyamide separation layer. With the increase of BTP content in aqueous monomer, the thickness and water flux of the polyamide separation layer increased, but the salt rejection slightly decreased. The optimal water phase composition is: PIP concentration was 0.4wt %, BTP concentration was 0.6wt %, at this time, the pure water permeability coefficient of nanofiltration membrane was 10.5 Lm-2 h-1 bar-1, 1.54 times of the original membrane. The rejection rates of Na2SO4, MgSO4, MgCl2 and NaCl were 97.3%, 91.4%, 40.7% and 31.7%, respectively.

基金项目：

海油发展科技项目“高性能膜法油水分离技术”（HFKJ-CGXM-AQ-2020-01）；大连市科技创新基金应用基础研究项目“新型碟管式反渗透膜组件研发”（2019J12SN67）；辽宁省自然科学基金“新型油水分离膜的制备与应用基础研究”（2019-MS-313）；

作者简介：

王新乐（1989-），男，山东聊城人，工程师，硕士，主要从事工业废水膜处理技术研究

参考文献：

[1] X. Li, Z. Wang, X. L. Han, et al. Regulating the interfacial polymerization process toward high-performance polyamide thin-film composite reverse osmosis and nanofiltration membranes: A review[J]. Journal of Membrane Science, 2021, 640: 119765-119788.
[2] N. Hilal, H. A. Zoubi, N. A. Darwish, et al. A comprehensive review of nanofiltration membranes: Treatment, pretreatment, modelling, and atomic force microscopy [J]. Desalination, 2004, 170 (3): 281-308.
[3] X. Li, Y. M. Cao, H. J. Yu, et al. A novel composite nanofiltration membrane prepared with PHGH and TMC by interfacial polymerization[J]. Journal of Membrane Science, 2014, 466: 82-91.
[4] B. V. D. Bruggen, M. Mänttäri, M. Nyström. Drawbacks of applying nanofiltration and how to avoid them: A review[J]. Separation and Purification Technology, 2008, 63(2): 251-263.
[5] K. Yoon, B. S. Hsiao, B. Chu. High flux nanofiltration membranes based on interfacially polymerized polyamide barrier layer on polyacrylonitrile nanofibrous scaffolds[J]. Journal of Membrane Science, 2009, 326(2): 484-492.
[6] J. B. Jin, D. Q. Liu, D. D. Zhang, et al. Preparation of thin-film composite nanofiltration membranes with improved antifouling property and flux using 2,2'-oxybis-ethylamine[J]. Desalination, 2015, 355：141-146.
[7] Q. F. An, F. Li, Y. L. Ji, et al. Influence of polyvinyl alcohol on the surface morphology, separation and anti-fouling performance of the composite polyamide nanofiltration membranes [J]. Journal of Membrane Science, 2011, 367(1-2):158-165.
[8] C. Y. Y. Tang, Y. N. Kwon, J. O. Leckie. Effect of membrane chemistry and coating layer on physiochemical properties of thin film composite polyamide RO and NF membranes I. FTIR and XPS characterization of polyamide and coating layer chemistry[J]. Desalination, 2009, 242(1-3):149-167.
[9] Y. L. Ren, J. Y. Zhu, S. Z. Cong, J. Wang, B. V. Bruggen, J. D. Liu, Y. T. Zhang, High flux thin film nanocomposite membranes based on porous organic polymers for nanofiltration, [J]. Journal of Membrane Science, 2019, 585: 19–28.
[10] S. S. Liu, Z. X. Low, H. M. Hegab, Z. L. Xie, R. W. Oua, G. Yang, G. P. Simon, X. W. Zhang, L. Zhang, H. T. Wang, Enhancement of desalination performance of thin-film nanocomposite membrane by cellulose nanofiber，[J]. Journal of Membrane Science 2019 ，592:117363-117369.
[11] D. Hu, Z. L. Xu, Y. M. Wei, et al. Poly(styrene sulfonic acid) sodium modified nanofiltration membranes with improved permeability for the softening of highly concentrated seawater[J]. Desalination, 2014, 336:179-186.
[12] H. B. Li, W. Y. Shi, Y. F. Zhang, et al. Improved performance of poly(piperazine amide) composite nanofiltration membranes by adding aluminum hydroxide nanospheres[J]. Separation and Purification Technology, 2016, 166: 240-251.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com