玉米醇溶蛋白磁性聚合物凝胶的制备及性能研究

Preparation and Properties of Zein-based Magnetic Polymer Gel

油污染是环境污染中存在的重要问题,含油废水的处理已成为世界范围的挑战。目前,吸油材料主要由合成聚合物组成,其难以降解并会造成二次污染。作为廉价的天然聚合物,玉米醇溶蛋白是基于氨基酸的植物蛋白,具有生物相容性和生物可降解性,研究发现玉米醇溶蛋白可用于制备食用复合材料和控释材料。本文以玉米醇溶蛋白和聚乙烯醇(PVA)为原料,采用溶胶-凝胶法,制备了玉米醇溶蛋白基聚合物凝胶。采用原位沉淀法引入Fe3O4,并通过硅烷偶联剂进一步进行表面改性,制备了玉米醇溶蛋白基磁性聚合物凝胶。通过FT-IR、SEM和TG等对其形貌和结构进行了表征。结果发现,聚合物凝胶具有多层网状结构,接触角为132.77°。改性凝胶具有显著的油水分离能力,且具有磁易分离的特点,可为水处理和环境保护提供一种有效且环境友好的吸附材料。

Oil pollution is of great significance in environmental pollution.Therefore,the disposal of oily wastewater has become a worldwide challenge.At present,oil-absorbing materials are mainly composed of synthetic polymers,which is difficult to degrade to cause secondary pollution.As an inexpensive natural polymer,zein is an amino acid-based vegetable protein with biocompatibility and biodegradability.We found that zein can be used to prepare edible composites and controlled release materials.Herein,using sol-gel method,the zein-based polymer gel was prepared by zein and poly(vinyl alcohol)(PVA).With further surface modification by silane coupling agent and in-situ precipitation for introducing Fe3O4,the zein-based magnetic polymer gel was successively prepared.Its morphology and structure were characterized by FT-IR,SEM and TG.It indicated that the polymer gel had a multi-layered network structure and the contact angle was 132.77°.The modified gel has significant capabilities of oil-water separation and magnetic separation,which will provide efficient and environmentally friendly Environmentally friendly adsorption materials for water treatment and environmental protection.