【摘要】 纤维素是地球上存量最大的生物质，为了将其功能化并开拓新的用途，制备了一种纤维素基的抗菌水凝胶，并利用平板抑菌实验证明了其对两种常见植物病害真菌有良好的抑制效果。首先，采用高碘酸钠将纤维素氧化，测定其氧化度，并得到最适氧化条件；然后将氧化纤维素与聚乙烯亚胺反应生成水凝胶，并通过高速匀浆得到质量分数为1.0%的水凝胶悬浮液；最后，评价纤维素-聚乙烯亚胺水凝胶(PEI/OC-gel)对水稻稻瘟病菌和尖孢镰刀菌(西瓜专化型)的抑菌效果。结果表明，质量浓度高于0.75 mg·m L-1的PEI/OC-gel可有效抑制稻瘟病菌和尖孢镰刀菌(西瓜专化型)的生长，因此有望将其用于防治水稻稻瘟病和西瓜蔓枯病等常见的植物真菌性感染。更多还原

【Abstract】 Cellulose is the largest stock of biomass on Earth. It is a research hotspot in the field of biomass to functionalize and develop new applications. A cellulose-based antibacterial hydrogel was prepared and proved to have good inhibition effects on two common plant disease fungi by plate bacteriostatic experiments. Firstly,the optimum oxidation conditions were obtained by oxidizing cellulose with sodium periodate and the oxidation degree was measured. Secondly, the oxidized cellulose was reacted with polyethyleneimine to produce hydrogel,and the hydrogel suspension with a mass fraction of 1.0% was prepared by high speed homogenization. Finally,the bacteriostatic effects of the cellulose-polyethyleneimine hydrogel（PEI/OC-gel） against Pyricularia grisea and Fusarium oxysporum f.spniveum were evaluated. The results show that the PEI/OC-gel could efficiently inhibit the growth of Pyricularia grisea and Fusarium oxysporum f.spniveum when the concentration was over0.75 mg·mL^-1. It is expected to be used to control common plant fungal infections such as rice blast and watermelon blight.更多还原