SWNTs/PANI复合纳滤膜的制备及气体分离研究
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- 英文论文题名：Study on Fabrication and Gas Separation of SWNTs/PANI Composite Membranes
- 论文作者：邱碧薇 ; 李周璟 ; 王霞
- 英文论文作者：Biwei Qiu ; Zhoujing Li ; Xia Wang ; School of Material Science and Engineering ; University of Shanghai for Science and Technology
- 年：2016
- 作者机构：上海理工大学材料科学与工程学院;
- 论文关键词：纳滤膜 ; 碳纳米管 ; 功能化
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第十七分会：流变学
- 语种：中文
- 分类号：TB332;TQ051.893
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第十七分会 ; 流变学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：113k
- 原文格式：D
- 会议级别：全国
摘要
碳纳米管(CNTs)具有优异的机械强度、化学稳定性以及原子级光滑内表面结构,可大大降低气体通过时的吸附力和摩擦力,因此以单臂碳纳米管(SWNTs)为作为过滤通道并填充聚合物的复合纳滤膜,有望获得较高的输运速率和良好的气体选择性分离效果。本文采用抽滤/电场协同法制备SWNTs/PANI复合膜,SWNTs除了在抽滤形成的剪切力作用下有序排列,还因介电泳效应使其沿着电场的方向定向排列。为了提高SWNTs在复合膜中的分散均匀性及垂直有序程度,采用浓硝酸/浓硫酸的混和酸液对SWNTs进行不同程度的功能化(接枝羧基和羟基的),获得了不同极性的SWNTs。结果表明,极性程度越高的SWNTs在电场作用下越容易取向,制备的SWNTs/PANI复合膜中其垂直有序程度越高,气体分离效果及选择性也越好。
Carbon nanotubes(CNTs) possess excellent mechanical strength,chemical stability and atomically smooth interiors.As filtrating channels,the adsorption and friction can be greatly minimized when the gases pass through so that SWNTs/polymer composite membranes have good prospects for gas transport and selective separation.In this work,SWNTs/PANI composite membranes were prepared by a filtration-electric synergy method.The SWNTs tends to align vertically by shear force formed by filtration as well as dielectric electrophoresis effect under the electric field.To improve the dispersion and verticality of SWNTs in composite membranes,chemical functionalization of SWNTs was recognized by a mixing acid with concentrated nitric acid and sulfuric acid.The distinct functionality of SWNTs(grafted with carboxyl and hydroxyl groups) were obtained with different polarity.With increasing polarity of SWNTs,the electrical field induced translational motion of polar SWNTs along the field direction and the SWNTs/PANI composite membrane exhibited a better performance on gas separation and selectivity.
Carbon nanotubes(CNTs) possess excellent mechanical strength,chemical stability and atomically smooth interiors.As filtrating channels,the adsorption and friction can be greatly minimized when the gases pass through so that SWNTs/polymer composite membranes have good prospects for gas transport and selective separation.In this work,SWNTs/PANI composite membranes were prepared by a filtration-electric synergy method.The SWNTs tends to align vertically by shear force formed by filtration as well as dielectric electrophoresis effect under the electric field.To improve the dispersion and verticality of SWNTs in composite membranes,chemical functionalization of SWNTs was recognized by a mixing acid with concentrated nitric acid and sulfuric acid.The distinct functionality of SWNTs(grafted with carboxyl and hydroxyl groups) were obtained with different polarity.With increasing polarity of SWNTs,the electrical field induced translational motion of polar SWNTs along the field direction and the SWNTs/PANI composite membrane exhibited a better performance on gas separation and selectivity.
引文
[1]Liao,Y.;Li,X.;Hoek,E.;Kaner,R.J.Mater.Chem.A 2013,1(48):15390.
[2]Ding,J.;Li,X.;Wang,X.;Zhang,J.;Yu,D.;Qiu,B.Nanoscale Res.Lett.2015,10:493.
[2]Ding,J.;Li,X.;Wang,X.;Zhang,J.;Yu,D.;Qiu,B.Nanoscale Res.Lett.2015,10:493.