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Poly (Vinyl Alcohol) Composite Membrane with Polyamidoamine Dendrimers for Efficient Separation of CO2/H2 and CO2/N2
Journal of Polymers and the Environment ( IF 5.3 ) Pub Date : 2022-06-27 , DOI: 10.1007/s10924-022-02491-5
Yaxin Zhao, Huafeng Tian, Yuge Ouyang, Aimin Xiang, Xiaogang Luo, Xingwei Shi, Songbai Ma

Although polyvinyl alcohol (PVA) membranes are commonly used for CO2 separation, there is still large development space in mechanical properties and high selectivity of the gas separation process. In this study, the gas separation performance and mechanical properties of the (PVA/Cu2+) substrate membranes were improved by introducing polyamidoamine (PAMAM). PAMAM had an important effect on the gas adsorption and separation performance of the membrane. In addition, the gas adsorption and separation properties of the PVA/Cu2+/PAMAM membrane (PPCm) were analyzed and studied when the inlet gas pressure and the species of mixed gases were variable. The results showed that the crystallinity and mechanical properties of the membrane with the PAMAM had been significantly improved. Young’s modulus of PPCm with 30% PAMAM was 132% higher than that of the PVA/Cu2+ composite membrane without PAMAM. In addition, efficient separation efficiency and high selectivity of the gas separation process were observed. The separation factors of the PPCm for CO2/H2 and CO2/N2 were about three times higher than that of the PVA/Cu2+ substrate membranes. These results suggested that the introduction of PAMAM was promising for CO2 separation and permeance.



中文翻译:

用于高效分离 CO2/H2 和 CO2/N2 的聚(乙烯醇)复合膜与聚酰胺胺树枝状大分子

虽然聚乙烯醇(PVA)膜常用于CO 2分离,但在气体分离工艺的机械性能和高选择性方面仍有较大的发展空间。在这项研究中,通过引入聚酰胺胺(PAMAM)提高了(PVA/Cu 2+)基底膜的气体分离性能和机械性能。PAMAM对膜的气体吸附分离性能有重要影响。此外,PVA/Cu 2+的气体吸附分离性能/PAMAM膜(PPCm)在入口气体压力和混合气体种类可变时进行了分析和研究。结果表明,PAMAM膜的结晶度和力学性能得到了显着改善。含有30% PAMAM 的PPCm 的杨氏模量比不含PAMAM 的PVA/Cu 2+复合膜的杨氏模量高132%。此外,观察到气体分离过程的高效分离效率和高选择性。PPCm对CO 2 /H 2和CO 2 /N 2的分离因子是PVA/Cu 2+基膜的三倍左右。这些结果表明,引入 PAMAM 对 CO2分离和渗透。

更新日期:2022-06-27
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