膜科学与技术

烧结ZIF-300/PSU6010混合基质膜用于高效CO2分离

作者：魏以旺，孙玉绣，郭翔宇，乔志华

单位：天津工业大学省部共建分离膜与膜过程国家重点实验室，化学工程与技术学院，天津 300387

关键词： ZIF-300；烧结；混合基质膜；CO2/CH4分离

出版年,卷(期):页码： 2023,43(3):30-36

摘要：

以硝酸锌六水合物为金属源，5-溴苯并咪唑和2-甲基咪唑为配体，合成了类沸石咪唑骨架材料ZIF-300。然后将不同温度下烧结的SZIF-300颗粒作为填料加入到聚醚砜（PSU）中，制备了SZIF-300/PSU6010混合基质膜。研究了不同的烧结温度和负载量对所制备的SZIF-300/PSU6010混合基质膜气体分离性能的影响。在烧结温度为450 ℃的条件下合成了无定型SZIF-300-3,将其作为填料掺杂在聚醚砜中，制备出了SZIF-300/PSU6010-3混合基质膜。结果表明，在进气压力为0.2 MPa、测试温度为25 ℃、烧结温度为450 ℃且负载量为30 %（质量分数）条件下，SZIF-300/PSU6010-3混合基质膜的CO2通量与纯膜相比基本保持不变，为10 Barrer；CO2/CH4选择性为60.22，是PSU纯膜选择性(α(CO2/CH4)=17.15)的3.4倍。

Zeolititic imidazolate frameworks material-300 (ZIF-300) was synthesized with zinc nitrate hexahydrate as metal source, 5-bromobenzimidazole and 2-methylimidazole as ligands. Then SZIF-300 particles sintered at different temperatures were added to polyethersulfone (PSU) as filler to preparing SZIF-300/PSU6010 mixed matrix membranes. In this paper, the effect of different sintering temperature and loading on the gas separation performance of prepared SZIF-300/PSU6010 mixed matrix membrane was studied. At the sintering temperature of 450 ℃, amorphous SZIF-300-3 was synthesized and doped in PSU as filler to prepare the mixed matrix membrane of SZIF-300-3/PSU6010. The results showed under the conditions of 0.2 MPa inlet pressure, 25 ℃ test temperature, 450 ℃ sintering temperature and 30 wt% loading, the CO2 permeability of SZIF-300-3/PSU6010 mixed matrix membrane basically unchanged at 10 barrer. Furthermore, CO2/CH4 selectivity was 60.22, which was 3.4 times of pure PSU membrane selectivity (α(CO2/CH4)=17.15).

魏以旺（1996-），男，天津东丽人，硕士研究生，主要研究方向为气体分离膜的制备，Email：2572450953@qq.com

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