介孔二氧化硅搭载UV-9透明抗紫外聚丙烯食品包装薄膜制备及其性能评价  

Preparation and property evaluationof transparent butUV-resistant polypropylene packaging films containingUV-9 loaded with mesoporous SiO2

作　　者：徐国栋 卢立新 丘晓琳 潘嘹 卢莉璟 XU Guodong;LU Lixin;QIU Xiaolin;PAN Liao;LU Lijing(School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China;Jiangsu Key Laboratory of Advance Food Manufacturing Equipment and Technology,Wuxi 214122, China)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]江苏省食品先进制造装备技术重点实验室,江苏无锡214122

出　　处：《功能材料》2020年第4期4007-4012,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51503084);无锡市科技发展资金资助项目(WX18ⅡAG722)。

摘　　要：以十六烷基三甲基溴化铵(CTAB)作为模板剂制备出纳米介孔SiO2,并以此为载体搭载抗紫外助剂UV-9制备“SiO2/UV-9”粉体,将聚丙烯(PP)与“SiO2/UV-9”和UV-329共混后,流延挤出制备透明抗紫外包装复配膜。采用投射电镜、氮气吸附等手段表征介孔SiO2结构,对薄膜进行紫外-可见光光谱分析、膜内助剂迁移试验测试。结果表明,制备介孔SiO2的比表面积为725 m^2/g,平均孔径为2.8 nm;该包装复配薄膜内抗紫外助剂低于水基、酸性和酒精类食品接触材料特定迁移限量(SML);复配薄膜在可见光波段的透光率达80%以上,在紫外光波段的透光率低于40%。Nano mesoporous SiO2 was prepared with hexadecyl trimethyl ammonium bromide(CTAB)as template.The nano mesoporous SiO2 was used as the carrier with UV-9 to prepare“SiO2/UV-9”powder.Polypropylene(PP)was mixed with“SiO2/UV-9”and UV-329 to prepare the transparent but uvioresistant food packaging compounded film by extrusion casting machine.The structure of mesoporous SiO2 was characterized by transmission electron microscope(TEM)and nitrogen adsorption.The compounded film was analyzed by UV-visible spectrum and the migration test of auxiliaries.The results showed that the specific surface area of mesoporous SiO2 was 725 m^2/g and the average pore diameter was 2.8 nm.UV-9 and UV-329 of compounded film were lower than the specific migration limit(SML)of water-based,acidic and alcoholic food contact materials.The transmittance of the compounded film in the visible band was more than 80%and the transmittance in the ultraviolet band was less than 40%.

关 键 词：纳米介孔二氧化硅 抗紫外 透明 迁移量 聚丙烯薄膜 

分 类 号：TS206[轻工技术与工程—食品科学]