Graphene Oxide Nanosheets Based Novel Facilitated Transport Membranes for Efficient CO2 Capture
Graphene Oxide Nanosheets Based Novel Facilitated Transport Membranes for Efficient CO2 Capture
复制标题
基于氧化石墨烯纳米片的新型促进传输膜可有效捕获二氧化碳
DOI：
10.1021/acs.iecr.6b01005
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发表时间：
2016-05-11
影响因子：
4.2
通讯作者：
Chen, Vicki
中科院分区：
文献类型：
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作者：
Dong, Guanying;Zhang, Yatao;Chen, Vicki
以氧化石墨烯纳米片（GO）、超支化聚乙烯亚胺（HPEI）和均苯三甲酰氯（TMC）为原料，通过界面聚合法在聚砜膜上制备了一种新型的固定载体复合膜。用SEM、TEM、ATR-FTIR、XPS、DSC和水接触角等方法对界面聚合进行了表征。进一步的CO2/N2（10：90 v：v）混合气体的气体分离试验证实，GO的加入可以显著提高CO2渗透性和CO2/N2选择性。在这项工作中的最高CO2渗透率为9.7 GPU，而选择性超过80。在不同原料气湿度条件下的气体分离实验进一步证实了促进传递是气体通过膜分离的主要机理，而GO的加入与气体载体表现出协同效应：膜表面缺陷起到分子筛的作用，层间固定的流道保证了高含水量的微环境，提高了CO2和CO 2的反应活性。
A novel fixed carrier composite membrane was prepared via interfacial polymerization by using graphene oxide nanosheets (GO), hyperbranched polyethylenimine (HPEI), and trimesoyl chloride (TMC) coating on a polysulfone membrane. The interfacial polymerization was confirmed with SEM, TEM, ATR-FTIR, XPS, DSC, and water contact angle. Further gas separation tests with CO2/N2 (10:90 v:v) mixed gas confirmed that the addition of GO could significantly improve the CO2 permeance and CO2/N2 selectivity. The highest CO2 permeance in this work was 9.7 GPU, while the selectivity was over 80. A further gas separation test under different feed gas humidity confirmed the facilitated transport was the main mechanism of gas separation through the membrane, while the addition of GO into the membrane exhibited a synergistic effect with the gas carriers: the surface defects acted as molecule sieves, and the interlayer fixed flow channels ensured a high water content microenvironment to improve the reactivity between CO2 and...