摘要
为了改善淀粉基薄膜机械性能和多功能性的缺陷,该研究采用刮刀涂布法,结合羧基化纤维素纳米纤维和茶多酚介导的网络纠缠和氢键组装提高纯淀粉膜的机械强度,开发了多功能茶多酚/羧基化纤维素纳米纤维/淀粉复合膜(tea polyphenol/carboxylated cellulose nanofiber/starch composite film,SF-CNF-TP),并对复合膜的结构及性能进行测定分析。结果表明,羧基化纤维素纳米纤维的添加将淀粉基薄膜的机械性能(韧性值)提升了2.47倍,尤其将断裂伸长率显著增加了1.14倍。茶多酚的添加进一步提高了羧基化纤维素纳米纤维/淀粉复合膜的拉伸强度并成功赋予其良好的紫外线屏蔽、抗氧化和抑菌能力,SF-CNF-TP在紫外区的紫外吸收能力接近100%,对2种革兰氏阳性菌(金黄色葡萄球菌和李斯特菌)和2种革兰氏阴性菌(大肠杆菌和沙门氏菌)均表现出明显的抑菌活性。最后,土壤降解实验和豆芽生长实验证实复合膜具备生物降解性和生物安全性。这些结果显示了SF-CNF-TP作为可持续包装材料的应用潜力。
To address the limitations of starch-based films in mechanical performance and multifunctionality,this study utilized a blade coating method,incorporating carboxylated cellulose nanofiber and tea polyphenol to enhance the mechanical strength of pure starch films through network entanglement and hydrogen bond assembly.A multifunctional tea polyphenol/carboxylated cellulose nanofiber/starch composite film(SF-CNF-TP)was developed,and its structure and properties were systematically characterized.Results demonstrated that carboxylated cellulose nanofiber incorporation improved the mechanical performance by 2.47-fold in toughness value,with a particularly remarkable 1.14-fold increase in elongation at break.The addition of tea polyphenol further improved the tensile strength of carboxylated cellulose nanofiber/starch composite films while successfully endowing them with good UV-shielding,antioxidant,and antibacterial capabilities.SF-CNF-TP demonstrated nearly 100%UV absorption capacity in the ultraviolet region and exhibited significant antibacterial activity against both Gram-positive bacteria(Staphylococcus aureus and Listeria monocytogenes)and Gram-negative bacteria(Escherichia coli and Salmonella Typhimurium).Soil degradation tests and bean sprout growth experiments confirmed the composite films’biodegradability and biosafety.These findings collectively demonstrate the application potential of SF-CNF-TP as sustainable packaging materials.
作者
施嘉妮
张碟
杨月月
焦爱权
金征宇
SHI Jiani;ZHANG Die;YANG Yueyue;JIAO Aiquan;JIN Zhengyu(State Key Laboratory of Food Science and Resources,Jiangnan University,Wuxi 214122,China;School of Food Science and Technology,Jiangnan University,Wuxi 214122,China)
出处
《食品与发酵工业》
北大核心
2025年第19期135-145,共11页
Food and Fermentation Industries
关键词
淀粉基薄膜
刮刀涂布法
羧基化纤维素纳米纤维
茶多酚
机械性能
starch-based film
blade coating
carboxylated cellulose nanofiber
tea polyphenol
mechanical property
作者简介
第一作者:施嘉妮,硕士研究生;通信作者:焦爱权,副教授,E-mail:aqjiao@jiangnan.edu.cn。
