摘要
为开发抗菌可降解材料,将纳米二氧化钛(nano-TiO_(2))作为抗菌剂,以溶液共混流延法制备壳聚糖(CS)/纳米纤维素(NC)/nano-TiO_(2)复合膜。利用FTIR、XRD、SEM、TG等方法对复合膜的化学结构、结晶性质、微观形貌、热稳定性进行表征,并研究了nano-TiO_(2)对复合膜吸水稳定性、力学性能和抗菌性能的影响。结果表明,NC在CS中均匀分散,二者相互作用形成了结构致密的CS/NC基膜,4%的nano-TiO_(2)能均匀地分散嵌于基膜中,显著改善了复合膜的热稳定性,当热失重率为20%时,与CS膜相比,热失重温度提高了77℃。性能测试结果表明,当nanoTiO_(2)含量为4%时,复合膜的力学性能最佳,与纯CS膜相比,吸水率降低了40%,拉伸强度提高了35%,断裂伸长率提高了29%。同时复合膜还具有良好的抗菌性,其对大肠杆菌和金黄色葡萄球菌的抗菌率分别为84%和88%。
For developing antibacterial packaging film,the chitosan(CS)/cellulose(NC)/nano-TiO_(2) composite membrane was prepared by solution casting method,with adding nano-TiO_(2) as antibacterial additives.The structure,crystallization behavior,morphology and thermal property of CS/NC/nano-TiO_(2) membrane were characterized by FTIR,XRD,SEM and TG,and its water absorption,mechanical and antibacterial properties were tested.Result shown that NC disperses uniformly in CS and interacts with each other to form a dense CS/NC film.4%nano-TiO_(2) could be uniformly dispersed in the substrate,and the thermal stability of the composite film was significantly improved,with 20%weight loss temperature increased by 77℃.Performance test results showed that when the nano-TiO_(2) content was 4%,the mechanical properties of the composite membrane were the best.Compared with the pure CS membrane,the water absorption was reduced by 40%,the tensile strength was increased by 35%,and the elongation at break was increased by 29%.The composite membrane also had good antibacterial properties,and the antibacterial rates of Escherichia coli and Staphylococcus aureus were 84%and 88%,respectively.
作者
曾安然
吉顺峰
曾安蓉
ZENG Anran;JI Shunfeng;ZENG Anrong(School of New Materials and Shoes&Clothing Engineering,Liming Vocational University,Quanzhou,Fujian 362000,China)
出处
《塑料》
CAS
CSCD
北大核心
2021年第5期93-97,102,共6页
Plastics
基金
黎明职业大学博士科研启动基金(LZB201901)。
关键词
纳米纤维素
壳聚糖
纳米二氧化钛
复合膜
抗菌材料
nano-cellulose
chitosan
nano-TiO_(2)
composite membrane
antibacterial materials
