膜科学与技术

MXene层状膜负载低共熔溶剂及气体分离性能的研究

作者：武丹，贾佑雨，李奕帆

单位：郑州大学化工学院，郑州450001

关键词： MXene层状膜低共熔溶剂气体分离

出版年,卷(期):页码： 2023,43(4):10-20

摘要：

二维层状膜在气体分离中的高效传递归因于连续规整的层间通道，然而纳米片的局部低效率堆积在放大制膜时难以避免，将导致缺陷产生和气体分离效率的严重下降。基于此，制备了一系列低共熔溶剂插层的磺化MXene层状膜。以亲CO2的磺化MXene二维层状膜作为骨架，通过在二维通道内搭载低共熔溶剂来降低层间缺陷的产生。所制备的低共熔溶剂插层的MXene层状膜在湿态下具有良好的二氧化碳渗透性和选择性，其中，T@MX/ChCl:MEA 和 T@MX/TEPA.Cl:EG 在湿态下渗透速率分别达到了513 GPU和493 GPU，选择性为191.4和204.8。本研究旨在探究“水促进CO2传递”机制在载液MXene二维通道内的可行性，同时，也为以MXene为基础的膜设计和制造提供了一种新的策略。

The continuous and regular interlayer channels are attributed with facilitating the efficient transfer of two-dimensional lamellar membranes in gas separation. However, the low efficiency
of local nanosheet packing is inevitable, which can significantly lower the gas separation performance. Accordingly, a number of deep eutectic solvent intercalated sulfonated MXene lamellar membranes were created. By carrying a deep eutectic solvent in the 2D channel, interlayer defects were prevented by using a sulfonated MXene membrane as the skeleton. The deep eutectic solvent interlayer-prepared MXene lamellar membranes have good CO2 permeance and selectivity in wet state(CO2/N2 selectivity of 191.4 and 204.8 and CO2 permeance of 513 and 493 GPU for
T@MX/ChCl:MEA and T@MX/TEPA.Cl:EG, respectively). This study is expected to evaluate
the feasibility of the "water-facilitated CO2 transfer" mechanism in the two-dimensional MXene channel and to propose a fresh approach to the development of MXene-based membranes.

武丹（1997－），女，河南省新乡市人，硕士研究生，主要研究方向为膜分离技术，E－mail：wudan9701@163.cm.

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