当前位置：
X-MOL 学术
›
Nano Lett.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Continuous Covalent Organic Framework Membranes with Ordered Nanochannels as Tunable Transport Layers for Fast Butanol/Water Separation
Nano Letters ( IF 9.6 ) Pub Date : 2024-09-06 , DOI: 10.1021/acs.nanolett.4c02458 Hukang Guo 1, 2 , Yijie Fang 1, 2 , Jiaqi Li 1, 2 , Weilin Feng 1, 2 , Chuanjie Fang 1, 2 , Liping Zhu 1, 2, 3
Nano Letters ( IF 9.6 ) Pub Date : 2024-09-06 , DOI: 10.1021/acs.nanolett.4c02458 Hukang Guo 1, 2 , Yijie Fang 1, 2 , Jiaqi Li 1, 2 , Weilin Feng 1, 2 , Chuanjie Fang 1, 2 , Liping Zhu 1, 2, 3
Affiliation
|
Polymeric membranes with high permselective performance are desirable for energy-saving bioalcohol separations. However, it remains challenging to design membrane microstructures with low-resistance channels and a thin thickness for fast alcohol transport. Herein, we demonstrate highly crystalline covalent organic framework (COF) membranes with ordered nanochannels as tunable transport layers for efficient butanol/water separation. The thickness was well-regulated by altering the concentration and molar ratio of two aldehyde monomers with different reactivity. The surface-integrated poly(dimethylsiloxane) produced defect-free and hydrophobic COF membranes. The membrane with continuous transport channels exhibited an exceptional flux of up to 18.8 kg m–2 h–1 and a pervaporation separation index of 217.7 kg m–2 h–1 for separating 5 wt % n-butanol/water. The separation efficiency exceeded that of analogous membranes. The calculated mass-transfer coefficient of butanol followed an inverse relationship with the COF membrane thickness. Consequently, this work reveals the great potential of crystalline polymeric membranes with high-density nanopores for biofuel recovery.
中文翻译：
具有有序纳米通道的连续共价有机框架膜作为可调节传输层用于快速丁醇/水分离
具有高选择性渗透性能的聚合物膜是节能生物醇分离的理想选择。然而，设计具有低阻力通道和薄厚度的膜微结构以实现快速酒精传输仍然具有挑战性。在此，我们展示了高度结晶的共价有机框架（COF）膜，其具有有序纳米通道作为可调传输层，可实现有效的丁醇/水分离。通过改变具有不同反应性的两种醛单体的浓度和摩尔比可以很好地调节厚度。表面集成的聚（二甲基硅氧烷）生产出无缺陷且疏水的 COF 膜。具有连续传输通道的膜在分离 5 wt%正丁醇/水时表现出高达 18.8 kg m –2 h –1的优异通量和 217.7 kg m –2 h –1的渗透汽化分离指数。分离效率超过同类膜。计算得出的丁醇传质系数与 COF 膜厚度呈反比关系。因此，这项工作揭示了具有高密度纳米孔的结晶聚合物膜在生物燃料回收方面的巨大潜力。
更新日期：2024-09-06
中文翻译：
具有有序纳米通道的连续共价有机框架膜作为可调节传输层用于快速丁醇/水分离
具有高选择性渗透性能的聚合物膜是节能生物醇分离的理想选择。然而，设计具有低阻力通道和薄厚度的膜微结构以实现快速酒精传输仍然具有挑战性。在此，我们展示了高度结晶的共价有机框架（COF）膜，其具有有序纳米通道作为可调传输层，可实现有效的丁醇/水分离。通过改变具有不同反应性的两种醛单体的浓度和摩尔比可以很好地调节厚度。表面集成的聚（二甲基硅氧烷）生产出无缺陷且疏水的 COF 膜。具有连续传输通道的膜在分离 5 wt%正丁醇/水时表现出高达 18.8 kg m –2 h –1的优异通量和 217.7 kg m –2 h –1的渗透汽化分离指数。分离效率超过同类膜。计算得出的丁醇传质系数与 COF 膜厚度呈反比关系。因此，这项工作揭示了具有高密度纳米孔的结晶聚合物膜在生物燃料回收方面的巨大潜力。
京公网安备 11010802027423号