秦广超¹，张宁坤¹，汪海晨¹，乐 力²，李万园¹，郑会会¹

（1. 合肥学院 能源材料与化工学院，安徽 合肥 230601；2. 安徽江东科技粉业有限公司，安徽 宣城 242546）

DOI:10.13732/j.issn.1008-5548.2023.01.011

收稿日期： 2022-06-24，修回日期：2022-11-10，在线出版时间：2022-12-05 08:57。

基金项目：安徽省重点研发项目，编号：202104a05020029。

第一作者简介：秦广超(1971—)，男，教授，硕士，硕士生导师，研究方向为材料制备与设计。E-mail: qgchao@163.com。

摘要：以硝酸锌(zinc nitrate, Zn(NO₃)₂)为锌源，以壳聚糖(chitosan, CS)为基底，以氢氧化钠(sodium hydroxide, NaOH)为沉淀剂，采用液相沉淀法制备氧化锌-壳聚糖(zinc oxide-chitosan, ZnO-CS)复合材料；借助扫描电镜、 X射线衍射分析、热重分析、 X射线光电子能谱、红外光谱和紫外吸收光谱等手段进行表征，考察ZnO-CS复合材料的形貌、结构组成以及ZnO在CS表面的吸附情况；将ZnO-CS悬浊液涂抹在新鲜熟白米上进行ZnO-CS复合材料的抗菌性能测试。结果表明：Zn²⁺-CS表面首先生长了一层棒状ZnO粒子膜；通过受热反应CS表面的氨基与Zn²⁺、 ZnO形成交联网络，使棒状ZnO进一步生长形成片状ZnO;CS表面的氨基所形成的交联网络吸附ZnO,得到ZnO-CS复合材料；在时间为6 d时，用ZnO-CS悬浊液处理后的新鲜熟白米没有生成菌落，在时间为12 d时菌落无明显扩散，表明ZnO-CS复合材料具有良好的抗菌作用。

关键词：氧化锌-壳聚糖复合材料；液相沉积法；抗菌性能

Abstract：Zinc oxide-chitosan(ZnO-CS) composite materials was synthesized by liquid phase precipitation method with zinc nitrate(Zn(NO₃)₂)as zinc source, CS as base and sodium hydroxide(NaOH) as stabilizer. X-ray photoelectron spectroscopy, infrared spectroscopy and ultraviolet absorption spectroscopy, the morphology, structural composition and the adsorption of ZnO on the surface of ZnO-CS composite materials were investigated by means of scanning electron microscopy, X-ray diffraction analysis, thermogravimetric analysis. The antibacterial properties of ZnO-CS composite materials were tested by applying ZnO-CS suspension on fresh ripe white rice. The results show that a rod-like ZnO particle film is first grown on the surface of Zn²⁺-CS. The amino group on the surface of CS is heated to form a cross-linked network with Zn²⁺ and ZnO, and rod-like ZnO is further grown to form sheet ZnO. ZnO is adsorbed by cross-linking network formed by amino group on CS surface, and ZnO-CS composite is obtained. The fresh ripe white rice treated with ZnO-CS suspension doesn't generate colonies at 6 d, and there is no obvious proliferation of colonies at 12 d, indicating that ZnO-CS composite materials has a good antibacterial property.

Keywords：zinc oxide-chitosan composite materials; liquid phase precipiation method; antibacterial property

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