纳米纤维素凝胶微粒及其在Pickering泡沫中的应用  

Nanocellulose Gel Particles and Their Application in Pickering Foam

作　　者：王磊[1] 易凯 杨阳 王彩霞 吴敏[1] 鲁鹏[1] WANG Lei;YI Kai;YANG Yang;WANG Cai-xia;WU Min;LU Peng(College of Light Industry and Food Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学轻工与食品工程学院,南宁530004

出　　处：《包装工程》2021年第9期86-93,共8页Packaging Engineering

基　　金：国家自然科学基金青年基金(21706041);广西大学科研基金(XGZ160294);广西本科高校特色专业及实验实训基地(中心)建设项目(T3050094101)。

摘　　要：目的研究氧化纳米纤维素/乳酸链球菌素(TONCC/nisin)凝胶粒子的性质及其在环保抗菌泡沫中的应用。方法利用TONCC的表面羧基基团与nisin的表面阳离子的吸附耦合作用,制备TONCC/nisin水凝胶和微凝胶,以微凝胶作为稳定粒子,环氧大豆油丙烯酸酯(AESO)为油相,制备TONCC/nisin/AESO Pickering乳液,对水凝胶、微凝胶、乳液的稳定性进行研究;通过热固化乳液得到环保抗菌的泡沫材料,并对泡沫材料的结构和抗菌效果进行表征。结果水凝胶的结构随着在水中浸泡时长的增加而发生变化,宏观表现为坍塌变形,nisin逐渐析出,微凝胶随着静置时间的延长其粒径变化不大;以微凝胶作为界面稳定剂的AESO乳液的热稳定性较好,在90℃下加热30 min乳液液滴并未发生聚并现象,该乳液固化后形成的多孔泡沫材料对李斯特菌的抑制作用明显,当泡沫中nisin含量为2μg/g时,其抑菌率为43%。结论TONCC和nisin形成的微凝胶粒子在水中稳定性较好,可以用于乳化AESO制备Pickering泡沫,同时赋予泡沫多孔性和抗菌性,在制备环保抗菌泡沫方面有很大的应用潜力。To study the properties of oxidized nanocellulose/lactic streptococcus element(TONCC/nisin)gel particles and its application in the environmental protection antibacterial foam.TONCC/nisin hydrogels and microgels were prepared by the adsorption coupling of surface carboxyl groups of TONCC and surface cations of nisin.TONCC/nisin/AESO Pickering emulsion was prepared by using microgels as stable particles and epoxy soybean oil acrylate(AESO)as oil phase.Meanwhile,the stability of hydrogels,microgels and emulsions was studied.Finally,the antibacterial foam material was obtained by heat curing emulsion,and its structure and antibacterial effect were characterized.The structure of hydrogel changes with the extension of the duration of immersion in water,which is manifested as collapse deformation at the macro level,nisin is gradually precipitated out,and the particle size of microgel changes little with the extension of the standing time.AESO emulsions stabilized with microgel as interfacial stabilizer showed good thermal stability.No coalescence occurred in the emulsion droplet after heating for 30 min at 90℃.The porous foam material formed after curing of the emulsion had a significant inhibitory effect on listeria.When nisin content was 2μg/g in the foam,the antibacterial rate was 43%.The microgel particles formed by TONCC and Nisin have good stability in water and can be used to emulsify AESO to prepare Pickering foam.Meanwhile,the foam is also porous and antibacterial,which has great potential in preparing environmentally friendly antibacterial foam.

关 键 词：水凝胶 微凝胶 Pickering乳液 环保抗菌泡沫 

分 类 号：TB484.3[一般工业技术—包装工程] TS206.4[轻工技术与工程—食品科学]