Carboxyl graphene (CG) with two functions of hybridization and crosslinking was incorporated into poly(vinyl alcohol) (PVA) matrix to form PVA/CG mixed‐matrix membranes (MMMs). The membranes demonstrated excellent mechanical properties and thermal stability. The improved hydrophilicity and formed crosslinking structure led to moderate swelling. The membrane crystallinity decreased and the free volume was promoted with increasing CG loading amount. The pervaporation (PV) separation performance for ethanol dehydration indicated that both permeation flux and separation factor were enhanced simultaneously at the optimum CG loading. Subsequently, the permeation flux continued to increase while the separation factor declined at higher CG loadings.

中文翻译：

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用于全蒸发乙醇脱水的聚乙烯醇/羧基石墨烯膜

将具有杂交和交联两种功能的羧基石墨烯（CG）掺入聚乙烯醇（PVA）基质中，以形成PVA / CG混合基质膜（MMM）。该膜表现出优异的机械性能和热稳定性。改善的亲水性和形成的交联结构导致中等溶胀。随着CG负载量的增加，膜的结晶度降低，自由体积增加。乙醇脱水的全蒸发（PV）分离性能表明，在最佳CG负载下，渗透通量和分离因子均同时提高。随后，在较高的CG负荷下，渗透通量继续增加，而分离系数下降。