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首页> 外文期刊>Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides >Preparation and characteristics of quaternized chitosan/poly(acrylonitrile) composite nanofiltration membrane from epichlorohydrin cross-linking
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Preparation and characteristics of quaternized chitosan/poly(acrylonitrile) composite nanofiltration membrane from epichlorohydrin cross-linking

机译：环氧氯丙烷交联制备季铵化壳聚糖/聚丙烯腈复合纳滤膜及其特性

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摘要

Quaternized chitosan was prepared by modifying chitosan with 2,3-epoxypropy trimethylammonium chloride.A novel positively charged composite NF membrane was prepared by coating aq.quaternized chitosan onto a PAN UF membrane,subsequently cross-linked with epichlorohydrin.The effects of membrane preparation conditions on membrane properties and membrane characteristics were studied.The molecular weight cut-off of the representative membrane was obtained at about 560 Da (in NF range),and the structure was characterized by Scanning Electron Microscope,suggesting the composite structure of this membrane.At 25 °C,the pure water permeability is 9.25 L/h m2 MPa,and the order of rejection to different model solutes was MgCl2 approx = CaCl2 > NaCl approx = KCl > MgSO4 > Na2SO4,revealing the characteristic of positively charged NF membranes.The rejections to 1000 g/L MgCl2 and CaCl2 solutes were more than 0.96,so this membrane developed can be expected to use in the hardness removal of waste-water.
机译：用2,3-环氧丙基三甲基氯化铵改性壳聚糖制备季铵化壳聚糖，将季铵化壳聚糖水溶液涂在PAN UF膜上，然后与表氯醇交联，制备了一种新型带正电复合NF膜。在约560 Da（NF范围）内获得了代表性膜的分子量截止值，并通过扫描电子显微镜对其结构进行了表征，表明该膜的复合结构。 25°C时，纯水渗透率为9.25 L / h m2 MPa，对不同模型溶质的排斥顺序为MgCl2近似= CaCl2> NaCl近似= KCl> MgSO4> Na2SO4，展现了带正电NF膜的特性。对1000 g / L MgCl2和CaCl2溶质的截留率大于0.96，因此开发出的这种膜有望用于去除废水的硬度。

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