摘要
以低密度聚乙烯为基材,将改性T树脂和改性纳米ZnO加入其中,利用双螺杆造粒机以及流延机通过熔融共混制得改性聚乙烯薄膜,并研究改性T树脂和改性纳米ZnO的含量对聚乙烯薄膜的抑菌效果、水蒸气透过量、氧气透过量、力学性能、微观结构、红外光谱及紫外透过率的影响。结果表明,当加入1.5%的改性纳米ZnO时,薄膜的抑菌性能随改性T树脂含量的不断增大而更加显著,紫外线透过率的变化趋势为先降低后上升。当改性纳米ZnO的质量分数为1.5%、改性T树脂的质量分数为1%时,水蒸气透过量和氧气透过量最小,抗拉强度和断裂伸长率最大。薄膜的阻隔性效果和抑菌性能较好,可应用于食品包装,延长食品的保质期。
The modified T resin and the modified nano ZnO were added to the low density polyethylene as the substrate,and the modified polyethylene film was obtained by melt blending using a twin-screw granulator and a casting machine,and the modified T resin was studied.And the effect of modified nano-ZnO content on the antibacterial effect,water vapor transmission,oxygen permeation,mechanical properties,microstructure,infrared spectrum and UV transmittance of polyethylene film.The results show that when 1.5% modified nano-ZnO was added,the antibacterial property of the film was more significant with the increasing content of modified T resin.The change trend of the ultraviolet transmittance first decreased and then increased.When the mass fraction of the modified nano ZnO was 1.5% and the mass fraction of the modified T resin was 1%,the water vapor transmission amount and the oxygen permeation amount were the smallest,and the tensile strength and the elongation at break were the largest.The film had good barrier effect and antibacterial performance,and could be applied to food packaging to extend the shelf life of the food.
作者
程龙
杨福馨
姜悦
隋越
徐韬
汪志强
CHENG Long;YANG Fuxin;JIANG Yue;SUI Yue;XU Tao;WANG Zhiqiang(College of Food Science and Technology,Shanghai Ocean University,Shanghai 200120,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2019年第10期10163-10167,共5页
Journal of Functional Materials
基金
国家重点研发计划资助项目(2018YFD0400701)
上海市科委工程中心建设基金资助项目(11DZ2280300)
上海高校一流学科基金资助项目(A2-2019-14-0003)
关键词
包装
纳米ZNO
改性
挤出流延
薄膜
packaging
nano ZnO
modification
extrusion casting
film
