摘要
以α-ZrP为载体,通过微波辐射法,将3种水溶性壳聚糖衍生物羧甲基壳聚糖、N-三甲基壳聚糖季铵盐和N-对苯甲氧基甲基壳聚糖季铵盐插层进入α-ZrP层间,制备得到3种壳聚糖衍生物/磷酸锆纳米复合抑菌材料。通过红外光谱、X射线衍射、扫描电镜、透射电镜、电动电位分析和热重分析,对纳米复合材料的组成、结构和热稳定性进行表征。X射线衍射及电动电位分析实验结果表明:相较于α-ZrP,壳聚糖衍生物/磷酸锆纳米复合材料的层间距随着壳聚糖衍生物插层而明显增大,壳聚糖衍生物的正电性越强,复合材料的层间距越大,这表明壳聚糖衍生物与α-ZrP通过离子交换、氢键结合,已经成功地插层进入α-ZrP层间。热重分析结果显示复合材料的热稳定性较天然壳聚糖有显著提高。抑菌试验结果表明,复合材料对大肠杆菌和金黄色葡萄球菌都具有很好的抑菌效果。
Three chitosan derivatives,including carboxymethyl chitosan,N,N,N-trimethyl chitosan and N-metoxybenzenemethyl quaternary ammonium salt of chitosan,were intercalated into the layer of α-ZrP to prepare the nanocomposite materials by the method of microwave irradiation.The structures and morphologies of nanocomposites were characterized by FTIR,XRD,SEM,TEM,TG and zeta potential analysis.The XRD patterns showed that the interlayer spacing of nanocomposites was larger than the original α-ZrP,and the basal spacing of nanocomposites was enlarged with the increasing positive charge of chitosan derivative.It indicated that the chitosan derivative was intercalated into the layer of α-ZrP via hydrogen bonding.The TG experiments showed that the thermal stability of the nanocomposites was improved significantly and much better than that of chitosan.The antibacterial results showed that the nanocomposites had a good antibacterial effect on Escherichia coli and Staphylococcus aureus.
出处
《包装学报》
2017年第6期16-24,共9页
Packaging Journal
基金
湖南省科技厅重点研发计划基金资助项目(2017WK2042)
湖南省教育厅基金资助项目(17C0461)
制浆造纸科学与技术教育部/山东省重点实验室开放基金资助项目(KF201620)
