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首页> 外文期刊>RSC Advances >Cross-linking of poly(vinyl alcohol) with N,N '-methylene bisacrylamide via a radical reaction to prepare pervaporation membranes
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Cross-linking of poly(vinyl alcohol) with N,N '-methylene bisacrylamide via a radical reaction to prepare pervaporation membranes

机译：通过自由基反应将聚乙烯醇与N，N'-亚甲基双丙烯酰胺交联以制备渗透膜

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摘要

To retain the hydroxyl group of poly(vinyl alcohol) (PVA), ammonium persulfate (APS) was used to initiate the polymerization of hydrogen on the PVA chain. Rather than hydroxyl-based cross-linking, the generated PVA macromolecule radicals were cross-linked with N,N '-methylene bisacrylamide (MBA) to prepare PVA membranes. The PVA membranes were shown to be successfully cross-linked via FT-IR characterization, as well as measurements of swelling degree and gel fraction. With increasing the content of cross-linker, the swelling degree of the membranes decreased, and the gel fraction increased. The pervaporation performance of the membrane was investigated by separating 95 wt% ethanol aqueous solutions. The cross-linked PVA membrane containing 0.5 wt% cross-linker yielded a high permeate water content (99 wt%) and a total flux of 353 g m(-2) h(-1) at 40 degrees C. As the feed temperature increased, the total flux increased, while the permeate water content decreased. The cross-linked membrane exhibited good durability over long-term operation.
机译：为了保留聚乙烯醇（PVA）的羟基，过硫酸铵（APS）用于引发氢在PVA链上的聚合。而不是基于羟基的交联，将生成的PVA大分子自由基与N，N'-亚甲基双丙烯酰胺（MBA）交联以制备PVA膜。通过FT-IR表征以及溶胀度和凝胶分数的测量，PVA膜已成功交联。随着交联剂含量的增加，膜的溶胀度降低，凝胶分数增加。通过分离95重量％的乙醇水溶液来研究膜的全蒸发性能。含有0.5 wt％交联剂的交联PVA膜在40摄氏度时产生高渗透水含量（99 wt％）和总通量为353 gm（-2）h（-1）。随着进料温度的升高，总通量增加，而渗透水含量减少。所述交联膜在长期运行中显示出良好的耐久性。

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