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Thin-Film Composite (TFC) Polydimethylsiloxane (PDMS) Membrane with High Crosslinking Density Fabricated by Coaxial Electrospray for a High Flux
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-01-05 , DOI: 10.1021/acs.iecr.2c03758 Haijie Qing 1 , Senqing Fan 1 , Yangchao Liu 1 , Chuang Li 1 , Jiaxin Meng 1 , Mingxia Yang 1 , Zeyi Xiao 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-01-05 , DOI: 10.1021/acs.iecr.2c03758 Haijie Qing 1 , Senqing Fan 1 , Yangchao Liu 1 , Chuang Li 1 , Jiaxin Meng 1 , Mingxia Yang 1 , Zeyi Xiao 1
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To obtain thin-film composite (TFC) polydimethylsiloxane (PDMS) membranes for a high flux, the coaxial electrospray strategy was applied and an electrospray apparatus was self-assembled for membrane fabrication. The behavior of micron-sized dispersed droplets forming a contiguous membrane was explored. During the electrospray process, the structure of the PDMS membrane can be regulated and the thickness of the membrane can be precisely controlled. The TFC PDMS membrane without defects can be as thin as 2.3 μm. The crosslinking density of the electrosprayed TFC PDMS membrane was over 2.0 × 10–3 mol cm–3, which was 34% higher than the conventional casted membrane. During the pervaporation process with the TFC PDMS membrane for ethanol recovery, the membrane achieved a flux of 2522 g m–2 h–1 at 40 °C, which was over two times higher than that of the casted one, without compromising the expected separation factor. Besides, the TFC PDMS membrane performed good stability for a long time.
中文翻译：
高通量同轴电喷雾制备的高交联密度薄膜复合 (TFC) 聚二甲基硅氧烷 (PDMS) 膜
为了获得高通量薄膜复合 (TFC) 聚二甲基硅氧烷 (PDMS) 膜，应用同轴电喷雾策略，并自组装电喷雾装置进行膜制造。探索了形成连续膜的微米级分散液滴的行为。在电喷雾过程中，可以调控PDMS膜的结构，精确控制膜的厚度。没有缺陷的 TFC PDMS 膜可以薄至 2.3 μm。电喷雾 TFC PDMS 膜的交联密度超过 2.0 × 10 –3 mol cm –3，比传统流延膜高 34%。在使用 TFC PDMS 膜进行乙醇回收的渗透蒸发过程中，膜的通量达到 2522 gm–2 h –1在 40 °C 下，比铸造的高两倍以上，而不会影响预期的分离因子。此外，TFC PDMS膜长期表现出良好的稳定性。
更新日期：2023-01-05
中文翻译：
高通量同轴电喷雾制备的高交联密度薄膜复合 (TFC) 聚二甲基硅氧烷 (PDMS) 膜
为了获得高通量薄膜复合 (TFC) 聚二甲基硅氧烷 (PDMS) 膜，应用同轴电喷雾策略，并自组装电喷雾装置进行膜制造。探索了形成连续膜的微米级分散液滴的行为。在电喷雾过程中，可以调控PDMS膜的结构，精确控制膜的厚度。没有缺陷的 TFC PDMS 膜可以薄至 2.3 μm。电喷雾 TFC PDMS 膜的交联密度超过 2.0 × 10 –3 mol cm –3，比传统流延膜高 34%。在使用 TFC PDMS 膜进行乙醇回收的渗透蒸发过程中，膜的通量达到 2522 gm–2 h –1在 40 °C 下，比铸造的高两倍以上，而不会影响预期的分离因子。此外，TFC PDMS膜长期表现出良好的稳定性。
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