QIN Guangchao¹, ZHANG Ningkun¹, WANG Haichen¹, YUE Li², LI Wanyuan¹, ZHENG Huihui¹

(1.College of Energy Materials and Chemical Engineering, Hefei University, Hefei 230601, China;2. Anhui Jiangdong Science and Technology Powder Industry Co., Ltd., Xuancheng 242546, China)

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

Received： 2022-06-24，Revised：2022-11-10，Online：2022-12-05 08:57。

Funding Project：安徽省重点研发项目，编号：202104a05020029。

First Author：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。