Highly hydrogen permselective ZIF-8 membranes supported on polydopamine functionalized macroporous stainless-steel-nets
Highly hydrogen permselective ZIF-8 membranes supported on polydopamine functionalized macroporous stainless-steel-nets
复制标题
聚多巴胺功能化大孔不锈钢网支撑的高氢选择性 ZIF-8 膜
DOI：
10.1039/c4ta00299g
复制
发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Caro, Juergen
中科院分区：
文献类型：
--
作者：
Huang, Aisheng;Liu, Qian;Caro, Juergen
受贻贝生物粘附能力的启发，在聚多巴胺功能化的不锈钢网（SSN）上制备了高氢选择透过性的ZIF-8膜。通过在温和条件下对SSN进行聚多巴胺官能化，通过形成强非共价键和共价键促进了良好共生的ZIF-8膜的成核和生长，这有助于在保持高渗透性的同时提高膜的分离选择性。对于在100 °C和1巴下的二元混合物，发现H2-CO2、H2-N2、H2-CH 4和H2-C3 H8的混合物分离因子为8.1、15.0、23.2和329.7，其远远超过相应的Knudsen系数和所报道的ZIF-8膜的Knudsen系数。ZIF-8膜也显示出高渗透性，由于SSN的高空隙体积，H2渗透性高于2.1 × 10−5 mol m−2 s−1 Pa−1。
Inspired by the bio-adhesive ability of the marine mussel, highly hydrogen permselective ZIF-8 membranes were prepared on polydopamine functionalized stainless-steel-nets (SSNs). With polydopamine functionalization of SSNs under mild conditions, the nucleation and growth of well-intergrown ZIF-8 membranes were promoted through the formation of strong non-covalent and covalent bonds, which was helpful to enhance the membrane’s separation selectivity while maintaining high permeance. For binary mixtures at 100 °C and 1 bar, the mixture separation factors of H2–CO2, H2–N2, H2–CH4 and H2–C3H8, were found to be 8.1, 15.0, 23.2 and 329.7, which by far exceed the corresponding Knudsen coefficients and those of the as-reported ZIF-8 membranes. The ZIF-8 membranes also displayed high permeances, with the H2 permeance higher than 2.1 × 10−5 mol m−2 s−1 Pa−1 due to the high void volume of the SSNs.