Polyelectrolyte complex nanofiltration membranes by surface deposition of polyethylenimine on polyanion supports,Journal of Applied Polymer Science

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Polyelectrolyte complex nanofiltration membranes by surface deposition of polyethylenimine on polyanion supports
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2022-01-05 , DOI: 10.1002/app.52137
Chenwei Li _{1,

2} , Dujuan Hu _{1,

2} , Ling Liu _{1,

2} , Li Zhu ₃ , Man Xu ₃ , Cunwen Wang _{1,

2} , Yanbo Li _{1,

2}

Affiliation

Polyethylenimine (PEI) is a water-soluble polymer with higher density of cations and strong adsorbability. In the present work, loose nanofiltration membranes based on PEI were prepared by surface deposition of PEI on hydrolyzed polyacrylonitrile (PANH) supports through a surface crosslink method without using extra crosslinkers. The thinner selective layer (around 50 nm) of polyelectrolyte complex was formed through the crosslinks (ionic and co-valent) between amine groups in PEI and carboxyl groups in PANH. The PEI/PAN membranes were characterized by SEM, ATR-IR, and XPS. Nanofiltration of PEGs and salt solutions were performed to evaluate the membrane performance. Loose nanofiltration membranes, with molecular weight cut-off from 500 to 950 Da, permeances form 7 to 16 L m⁻² h⁻¹ bar⁻¹, were obtained by the simple surface crosslink method. The membrane performance can be facile tailored by controlling the deposition parameters, including deposition time and post-treatments.

中文翻译：

聚乙烯亚胺表面沉积在聚阴离子载体上的聚电解质复合纳滤膜

聚乙烯亚胺（PEI）是一种水溶性聚合物，具有较高的阳离子密度和较强的吸附性。在目前的工作中，通过表面交联法将 PEI 表面沉积在水解聚丙烯腈 (PANH) 载体上，制备了基于 PEI 的松散纳滤膜，而无需使用额外的交联剂。通过 PEI 中的胺基和 PANH 中的羧基之间的交联（离子和共价），形成了较薄的聚电解质复合物选择性层（约 50 nm）。PEI/PAN 膜通过 SEM、ATR-IR 和 XPS 进行了表征。进行 PEG 和盐溶液的纳滤以评估膜性能。松散的纳滤膜，截留分子量为 500 至 950 Da，渗透率为 7 至 16 L m ^-2 h ^-1 bar^-1，通过简单的表面交联法获得。通过控制沉积参数（包括沉积时间和后处理）可以轻松地调整膜性能。

更新日期：2022-01-05

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