壳寡糖交联明胶可生物降解薄膜的制备与性能研究
Preparation and Properties of Oligo-chitosan Cross-linked Gelatin Biodegradable Films
刘桂艳 1王贝 1杨若熙 1秦中立2
作者信息
- 1. 武汉华夏理工学院生物与制药工程学院,湖北武汉 430223
- 2. 湖北科技学院电子与信息工程学院,湖北咸宁 437100
- 折叠
摘要
目的:研究壳寡糖改性对明胶基薄膜性能的影响.方法:以废猪皮中提取明胶为基质,以壳寡糖和聚乙烯醇为改性交联剂,制备得到了明胶基薄膜.利用红外光谱、X射线衍射、扫描电子显微镜、分光光度法、拉力试验测试法对其结构和力学性能进行了测定,并测试了明胶基薄膜在抗氧化、抗菌、水稳定性和生物降解方面的性能.结果:交联改性后明胶薄膜的力学性能得到显著提升,断裂应力最高可达37.09 MPa,最大撕裂能为56.71 kJ/m2,且浸泡于水中48h仍能维持良好的物理形态,此外,薄膜还拥有优异透光性(最大可达92.32％),良好抗氧化性(自由基的清除率最高可达75.12％),优异抗菌性和生物降解性(完全降解时间＜45 h).结论:壳寡糖改性一定程度上改善了明胶基薄膜的力学性能和生物降解性能,赋予了薄膜良好抗菌性和抗氧化能力,表明其在食品包装上存在较大潜在应用价值.
Abstract
Objective:The aim was to evaluate the effect of oligo-chitosan modification on the properties of gelatin-based films.Methods:The gelatin-based films were prepared by using gelatin extracted from scrap pig skin as a cheap raw material and chitosan and polyvinyl alcohol as cross-linking agents.The structural and mechanical properties were characterized by Fourier infrared spectroscopy,X-ray power diffractometry,scanning electron microscopy,spectroscopy,and tensile test.Meanwhile,the ability of gelatin-based films in antioxidant,antibacterial,water stability and biodegradation were evaluated.Results:The multi-cross-linked gelatin-based films showed excellent mechanical properties,with a highest fracture stress of 37.09 MPa,a maximum tearing energy of 56.71 kJ/m2,and a good physical form maintained after 48 h of immersion in water.In addition,the films possessed excellent light transmission(up to 92.32％),good oxidation resistance(radical scavenging capacity up to 75.12％),excellent antimicrobial and biodegradability(complete degradation time＜45 h).Conclusions:The addition of oligo-chitosan has changed the properties of gelatin-based films in mechanics and biodegradation,and endowed the films with good antibacterial and antioxidant capacity,indicating that it had great potential application value in food packaging.
关键词
明胶/壳寡糖/交联/可生物降解薄膜/性能Key words
gelatin/oligo-chitosan/crosslinking/biodegradable film/property引用本文复制引用
基金项目
湖北省教育厅科研项目指导性项目(B2021394)
教育部产学合作协同育人项目(202101139004)
出版年
2024
国家科技期刊平台
NSTL
万方数据