电纺羧基官能化多壁碳纳米管/聚乙烯醇不对称全蒸发膜：应用和建模,Journal of Applied Polymer Science

当前位置： X-MOL 学术 › J. Appl. Polym. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

电纺羧基官能化多壁碳纳米管/聚乙烯醇不对称全蒸发膜：应用和建模
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-11-24 , DOI: 10.1002/app.51953
Qian Wen Yeang ₁ , Abu Bakar Sulong ₂ , Soon Huat Tan ₁

Affiliation

本研究的重点是开发一种不对称膜，该膜由电纺羧基官能化多壁碳纳米管 (COOH-MWCNT)/聚乙烯醇 (PVA) 复合纳米纤维层和密集的 PVA 分离层 (M _{COOH-MWCNT ) 组成}）。本研究中的电纺纳米纤维层充当“预选择层”，而不是其作为膜支撑的常见功能。此外，将亲水性填料 COOH-MWCNT 集成在纳米纤维中，可进一步提高膜渗透蒸发分离性能。由于电纺复合纳米纤维作为亲水层的存在，所得不对称膜在 1,4-二恶烷水溶液脱水中的全蒸发性能得到了极大的改善。与单独的致密PVA膜相比，所得非对称膜的透水通量增加近80%，分离因子从392.65提高到605.35。使用 Rautenbach 模型估计的参数表明，水 1 的脱水，通过全蒸发的 4-二恶烷溶液主要受吸附过程控制。电纺不对称膜的渗透通量、水和1,4-二恶烷的传输系数显示出实验数据与使用劳滕巴赫模型预测的数据之间的良好一致性。

"点击查看英文标题和摘要"

Electrospun carboxyl-functionalised multi-walled carbon nanotube/poly(vinyl alcohol) asymmetric pervaporation membrane: Application and modeling

This study focuses on the development of an asymmetric membrane comprised of an electrospun carboxyl-functionalised multi-walled carbon nanotube (COOH-MWCNT)/poly (vinyl alcohol) (PVA) composite nanofibre layer on a dense PVA separation layer (M_COOH-MWCNT). The electrospun nanofibre layer in this study acts as a “pre-selective layer” instead of its common function as a membrane support. In addition, COOH-MWCNT, a hydrophilic filler is integrated in the nanofibres to further enhance the membrane pervaporation separation performance. Immense improvement was observed in the pervaporation performance of the resultant asymmetric membranes in the dehydration of aqueous 1,4-dioxane solutions, owing to the presence of the electrospun composite nanofibres as a hydrophilic layer. The resultant asymmetric membrane showed an increase of nearly 80% in water permeation flux as compared to that of the dense PVA membrane alone, and the separation factor was improved from 392.65 to 605.35. The parameters estimated using Rautenbach model showed that the dehydration of aqueous 1,4-dioxane solutions via pervaporation is dominantly governed by sorption process. The permeation flux, transport coefficient of water and 1,4-dioxane of the electrospun asymmetric membrane showed a good agreement in between the experimental data and those predicted using Rautenbach model.

更新日期：2022-02-01

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南