壳聚糖/紫山药花青素/纳米氧化锌pH响应智能复合膜制备及性能研究
Preparation and performance of chitosan/purple yam anthocyanin/ZnO nanoparticles composites as pH-responsive smart films
韦阿飞 1李秋怡 1冯雪梦 1黄钰莹 1潘远凤1
作者信息
- 1. 广西大学化学化工学院,广西资源化工应用新技术高校重点实验室,南宁 530004
- 折叠
摘要
制备了一种智能复合包装膜壳聚糖(CS)/紫山药花青素(PYE)/纳米氧化锌(ZnO NPs),并探究了不同含量纳米氧化锌对复合膜在力学性能、热性能、水蒸气阻隔性能和抗氧化性能等方面的影响.结果表明,纳米氧化锌和花青素的协同作用显著提高了复合膜的拉伸强度、热稳定性、抗氧化性能和水蒸气阻隔性能.当纳米氧化锌的含量达2%时,复合膜的拉伸强度由 26.58 MPa提高到 41.79 MPa,断裂伸长率略有下降;初始分解温度由 256.12℃提高到271.41℃,水蒸气透过率降低了约17%.此外,纳米氧化锌的加入还进一步增强了复合膜的抗氧化和抗菌性能.在实际应用中,该复合膜展现出pH敏感性,能够通过颜色变化直观反映虾在贮藏过程中的品质变化,为食品安全监管提供了便捷手段.
Abstract
A type of smart composite packaging film consisting of chitosan(CS),purple yam anthocyanin extract(PYE),ZnO nanoparticles(NPs)was prepared,and the effects of addition amounts of ZnO NPs on the mechanical properties,thermal stability,water vapor barrier performance,and antioxidant properties of the composite films were in-vestigated.The results indicated that the synergistic effect of ZnO NPs and PYE resulted in a significant improvement in the tensile strength,thermal stability,antioxidant properties,and vapor barrier performance of the composite films.When 2 wt%ZnO NPs were added,the resultant composite film exhibited an increase in the tensile strength from 26.58 to 41.79 MPa along with a slight decrease in the elongation at break.Its initial decomposition temperature also increased from 256.12 to 271.41℃,but its water vapor transmission rate decreased by about 17%.In addition,the addition of ZnO NPs enhanced the antioxidant and antimicrobial properties of the composite film.In practical application,this com-posite film exhibited pH sensitivity,and it could visually detect a change in the quality of shrimp during storage through a change in color,providing a facile method for food safety monitoring.
关键词
壳聚糖/花青素/纳米氧化锌/紫山药/智能包装Key words
chitosan/anthocyanin/ZnO nanoparticle/purple yam/smart packaging引用本文复制引用
基金项目
国家自然科学基金项目(22068006)
广西大学大学生创新创业训练计划资助项目(S202310593265)
出版年
2024
国家科技期刊平台
NSTL
万方数据