KH560@ZnO掺杂淀粉复合材料及抑菌特性

KH560@ZNO doped starch composite and its antibacterial properties

摘要:

水热法制备纳米ZnO，通过熔融共混方式掺杂入淀粉基底，获得纳米ZnO淀粉复合材料，研究复合材料组成状况、微观形貌，分子构造、光电特性及相应作用规律，同时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85nm，KH560接枝改性纳米ZnO，接枝率5.26%~5.86%。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，KH560对纳米ZnO的修饰提高了掺杂材料在淀粉基底的分散程度及稳定性。随着纳米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随之增大，但透光率呈下降趋势。纳米ZnO掺杂量10%时，复合材料对大肠杆菌的抑菌率约95%。

Abstract:

Prepare nano-ZnO by hydrothermal method, doped into starch substrate by melt blending method, obtain nano-ZnO starch composite material, study the composition of composite material, microscopic morphology, molecular structure, photoelectric characteristics and corresponding law of action, and initially explore composite materials Inhibit the effect of E. coli. The results show that the nano-ZnO powder has uniform morphology, high crystallinity, and an average particle size of about 85nm. KH560 grafted modified nano-ZnO with a grafting rate of 5.26% to 5.86%. The modified nano-ZnO is further bonded to the starch substrate, and the composite material basically maintains the crystal structure. The modification of the nano-ZnO by KH560 improves the dispersion and stability of the doped material in the starch substrate. With the increase of the content of nano-ZnO, the photoluminescence intensity, ultraviolet shielding performance and ability of inhibiting Escherichia coli of the composite material increase, but the light transmittance shows a downward trend. When the nano-ZnO doping amount is 10%, the antibacterial rate of the composite material to E. coli is about 95%.