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首页> 外文期刊>Journal of Applied Polymer Science >Optimization of coating solution viscosity of hollow fiber-supported polydimethylsiloxane membrane for CO2/H-2 separation
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Optimization of coating solution viscosity of hollow fiber-supported polydimethylsiloxane membrane for CO2/H-2 separation

机译：中空纤维负载的聚二甲基硅氧烷膜的涂布溶液粘度优化CO2 / H-2分离

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To optimize the CO2 permeation and CO2/H-2 separation performance of hollow fiber-supported polydimethylsiloxane (PDMS) membranes, the effect of the viscosity of the PDMS coating solution on surface morphologies, thickness of PDMS layer, and solution intrusion into surface pores of hollow fiber supports was investigated. Increases in both stirring time and standing time could increase the viscosity of the PDMS solution. The PDMS layer thickness increased when the coating solution viscosity increased, whereas the surface roughness of the PDMS layer markedly decreased and then slightly changed. Moreover, when the stirring time of the PDMS coating solution was 9 min and the standing time was increased from 2 min to 25 min, the CO2 permeance first decreased, then increased to similar to 2250 GPU probably due to the decreased intrusion depth, and finally decreased because of the substantially increased thickness of the PDMS layer. However, the CO2/H-2 selectivity increased to 3.4 with an increase in coating solution viscosity. (C) 2017 Wiley Periodicals, Inc.
机译：优化中空纤维负载的聚二甲基硅氧烷（PDMS）膜的CO2渗透和CO2 / H-2分离性能，PDMS涂层溶液对表面形貌的粘度，PDMS层厚度的影响，以及溶液侵入表面孔研究了中空纤维载体。搅拌时间和站立时间的增加可以增加PDMS溶液的粘度。当涂布溶液粘度增加时，PDMS层厚度增加，而PDMS层的表面粗糙度显着降低，然后略微改变。此外，当PDMS涂布溶液的搅拌时间为9分钟并且脱液时间从2分钟增加到25分钟时，二氧化碳渗透率首先降低，然后增加到类似于2250 GPU，可能是由于入侵深度降低，最后由于PDMS层的厚度基本上增加而降低。然而，CO 2 / H-2选择性增加至3.4，随着涂布溶液粘度的增加而增加至3.4。 （c）2017 Wiley期刊，Inc。

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