摘要
目的以聚己二酸-对苯二甲酸丁二酯(PBAT)为基材,制备PBAT/ZSM-5分子筛共混薄膜,研究分子筛含量对薄膜性能的影响。方法通过共混熔融挤出流延法制得含不同质量分数ZSM-5分子筛(0%,1%,3%,5%,7%)的PBAT薄膜,测定分析不同分子筛质量分数对薄膜的颜色、透明性、结构、气体阻隔性、力学性能等性能的影响。结果随着分子筛质量分数的增加,透明性和断裂伸长率显著降低,抗拉强度先增加后降低,质量分数为1%分子筛的薄膜抗拉强度相对较大,较纯PBAT薄膜增加了12.34%;薄膜氧气透过性能整体上呈上升趋势,二氧化碳透过性和CO_(2)/O_(2)透过比均逐渐增加,水蒸气透过性显著降低,与纯PBAT薄膜相比,质量分数为7%分子筛PBAT薄膜的氧气和二氧化碳透过系数分别增加了18.48%,33.51%,水蒸气透过系数下降了43.28%,CO_(2)/O_(2)透过比由原来的8.84增加到9.96;薄膜表面和横截断面均变得粗糙,局部区域有团聚现象,且随分子筛含量的增加而变得明显。结论ZSM-5分子筛的少量加入,可以影响PBAT薄膜力学性能,降低其水蒸气透过性,调节薄膜的气体选择透过性,为其应用于生鲜果蔬包装提供基础。
The work aims to prepare ZSM-5 zeolite blending film with poly(butylene adipate-co-butylene terephthalate)(PBAT)as substrate to study the effect of ZSM-5 zeolite content on the properties of films.PBAT films containing ZSM-5 zeolite with different concentrations(0%,1%,3%,5%and 7%)were prepared by blending melt extrusion and casting method.The effect of ZSM-5 zeolite on color,transparency,structure,gas barrier properties and mechanical properties of the films were studied.With the increase of ZSM-5 zeolite,the transparency and elongation at break of the PBAT films decreased significantly;the tensile strength increased firstly and then decreased.When the concentration of ZSM-5 zeolite was 1%,the tensile strength of the film was relatively larger,which increased by 12.34%compared with the pure PBAT film.The oxygen permeability of the films showed an overall upward trend.The carbon dioxide permeability and ratio of CO_(2)/O_(2)increased gradually.The water vapor permeability reduced significantly.Compared with the pure PBAT film,the oxygen and carbon dioxide transmission coefficient of the PBAT film containing 7%ZSM-5 zeolite increased by 18.48%and 33.51%respectively;the water vapor transmission coefficient decreased by 43.28%,and the ratio of CO_(2)/O_(2)increased from 8.84 to 9.96.Both the surface and cross-section of PBAT films became rough,and the agglomeration of particles were partly observed,which became obvious with the increase of ZSM-5 zeolite.The low addition of ZSM-5 zeolite affects the mechanical properties of PBAT films,improves their water vapor barrier property,adjusts the gas permselectivity of the film,and provides a basis for its application in fresh fruits and vegetables packaging.
作者
王蕾
陈晨伟
戴方沁
陈文君
杨福馨
谢晶
WANG Lei;CHEN Chen-wei;DAI Fang-qin;CHEN Wen-jun;YANG Fu-xin;XIE Jing(College of Food Science and Technology,Shanghai Ocean University,Shanghai 201306,China;Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation,Shanghai 201306,China;Quality Supervision,Inspection and Testing Center for Cold Storage and Refrigeration Equipment,Ministry of Agriculture,Shanghai 201306,China;National Experimental Teaching Demonstration Center for Food Science and Engineering(Shanghai Ocean University),Shanghai 201306,China)
出处
《包装工程》
CAS
北大核心
2021年第21期86-92,共7页
Packaging Engineering
基金
国家重点研发计划(2018YFD0400701)
上海市科委公共服务平台建设项目(19DZ2284000)
上海市绿叶菜产业体系建设项目
上海市大学生创新项目(A1-2042-16-0003)。
