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Cu-Zn-Al多金属氧化物杂化炭膜制备及气体分离性能

作者：陆新元¹，庄殿铮²，张兵¹，江园¹，王同华³，宋恩军⁴

单位： 1. 沈阳工业大学石油化工学院，辽阳 111003; 2. 沈阳工业大学化工装备学院，辽阳 111003; 3. 大连理工大学化工学院，大连 116024; 4. 奥克控股集团股份公司，辽阳 111003

关键词：聚酰亚胺；掺杂剂；炭膜；气体分离性能

DOI号： 10.16159/j.cnki.issn1007-8924.2025.01.005

分类号： TQ028.8

出版年,卷(期):页码： 2025,45(1):40-47

摘要：

以聚酰亚胺为前驱体，Cu-Zn-Al多金属氧化物（CZA）为掺杂剂，经成膜和炭化过程制备了气体分离杂化炭膜.分别采用热重、红外光谱、X射线衍射、扫描电子显微镜、能谱及氮吸附等技术对前驱体热稳定性、炭膜表面官能团、微观结构与形貌、掺杂剂分布及孔结构进行了表征.考察了CZA含量对炭膜气体分离性能的影响.结果显示，CZA一定程度影响了前驱体热稳定性并使炭膜微观结构趋于致密；改变CZA用量能有效调控炭膜的气体分离性能.当CZA掺杂质量分数为0.1%时，所制备的杂化炭膜分离性能最佳,H2与O2渗透系数分别达到3746.15与610.15 Barrer，H2/N2与O2/N2的选择性分别为42.8和7.0.

Hybrid carbon membranes for gas separation were prepared by the processes of membrane formation and carbonization using polyimide as precursor and Cu-Zn-Al (CZA) multi-metal oxides as dopant. The thermal stability of the precursors, surface functional groups, microstructure, micromorphology, surface element distribution and pore structure of carbon membranes were characterized by the techniques of thermogravimetry, infrared spectroscopy, X-ray diffraction, scanning electron microscope, energy spectroscopy and nitrogen adsorption analysis, respectively. The effect of the CZA content on the gas separation performance of carbon membranes was mainly investigated. The results showed that the introduction of CZA affected the thermal stability of the precursor to a certain extent and densified the microstructure of carbon membranes. The variation in changing the amount of CZA amount could effectively regulate the gas separation performance of the carbon membrane. The optimal separation performance of the prepared hybrid carbon membranes is achieved when the doping mass fraction of CZA was 0.1%, i.e., H2 and O2 permeabilities could correspondingly reach to 3 746.15 and 610.15 Barrer, together with the selectivity of H2/N2 and O2/N2 being 42.8 and 7.0, respectively.

基金项目：

国家自然科学基金项目（20906063）；辽宁省自然科学基金项目(2021-MS-238)

作者简介：

陆新元（1996-），男，辽宁阜新人，硕士研究生，研究方向为气体分离炭膜及应用.

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