Page 66 - 《精细化工》2021年第5期

第 38 卷第 5 期 精 细 化 工 Vol.38, No.5
202 1 年 5 月 FINE CHEMICALS May 2021

功能材料
KH560@ZnO 掺杂淀粉复合材料的制备

及其抑菌特性

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贺非凡，胡 飞
（华南理工大学 食品科学与工程学院，广东 广州 510640）

摘要：采用 γ-(2,3-环氧丙氧)丙基三甲氧基硅烷（KH560）改性水热法制备纳米 ZnO，然后通过熔融共混方式将
其掺入淀粉基底，获得 KH560@ZnO 淀粉复合材料，研究复合材料组成、微观形貌，分子构造、光电特性及相
应作用规律，初步探索复合材料抑制大肠杆菌的效果。结果表明，纳米 ZnO 粉体形貌均一，具有较高的结晶度，
平均粒径约 85 nm，KH560 对纳米 ZnO 的接枝率为 10.09%。进一步将改性纳米 ZnO 与淀粉基底键合连接，复
合材料基本维持晶型构造，采用 KH560 对纳米 ZnO 改性提高了纳米 ZnO 在淀粉中的分散程度及稳定性。随着
KH560@ZnO 含量的增加，复合材料光致发光强度、紫外屏蔽性能和抑制大肠杆菌的能力提升，但透光率呈下
降趋势。KH560@ZnO 在淀粉材料中掺杂量为 10%（以淀粉质量为基准，下同）时，复合材料对大肠杆菌的抑
菌率约 95%。
关键词：淀粉；纳米 ZnO；KH560；光生电子；抑菌性；功能材料
中图分类号：TB332 文献标识码：A 文章编号：1003-5214 (2021) 05-0920-08

Preparation and antibacterial properties of
KH560@ZnO doped starch composites

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HE Feifan, HU Fei
（School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong,
China）

Abstract: Nano-ZnO prepared by hydrothermal method was modified by γ-(2,3-epoxypropoxy)propy-
trimethosysilane (KH560) to obtained KH560@ZnO. Then, KH560@nano-ZnO starch composites were
obtained via doping KH560@ZnO into starch by melt blending method. The composition microscopic
morphology, molecular structure, photoelectric characteristics and corresponding law of action of
composites were studied. And the inhibitory effect of composites for E. coli was initially explored. The
results showed that the prepared nano-ZnO powder had uniform morphology and higher crystallinity with
an average particle size of about 85 nm. The grafting rate of KH560 to nano-ZnO was 10.09%. The
modified nano-ZnO was further bonded to the starch. The composites basically maintained the crystal
structure. The dispersion degree and stability of nano-ZnO in starch were improved by KH560 modification.
With the increase of KH560@ZnO content, the photoluminescence intensity, ultraviolet shielding
performance and ability of inhibiting E. coli of the composites increased, but the light transmittance
displayed a declining trend. When the content of KH560@ZnO was 10% the mass of starch), the
antibacterial rate of the composite to E. coli was about 95%.
Key words: starch; nano-ZnO; KH560; photoelectron; inhibitory effect; functional materials

收稿日期：2020-10-14; 定用日期：2020-12-25; DOI: 10.13550/j.jxhg.20200941
基金项目：国家自然科学基金重点项目（U1501214）
作者简介：贺非凡（1996—），女，硕士生，E-mail：2423429553@qq.com。联系人：胡 飞（1972—），男，副教授，E-mail：g95216@
163.com。