摘要
利用有机官能团修饰介孔氧化硅的孔径,降低吸附在介孔氧化硅上抗氧化剂在活性包装膜上的释放速率,延长油脂食品的存储期和货架期。以十四烷基三甲基溴化铵为模板剂合成经典的二维六方结构的介孔氧化硅MCM-41,并采用后修饰嫁接法基于氧化硅表面的硅醇基与有机官能团7-[(3-三乙氧基甲硅烷基)丙氧基]香豆素(TCP)结合,将食品级的特丁基对苯二酚吸附在组装体上并与树脂共混后,在多层共挤流延机上成膜。使用全自动比表面及孔隙度分析仪、X射线衍射仪、透射电子显微镜、傅里叶红外光谱仪、热重分析仪测定介孔氧化硅的比表面积和孔径、晶体结构、形貌、骨架振动热稳定性。经香豆素衍生物修饰后的氧化硅孔径由最初的2.717~2.384 nm,孔道长程有序没有塌陷,TCP成功接枝在MCM-41上。经香豆素衍生物修饰后的薄膜,自由基清除率达到89.76%,相比未修饰的氧化硅,控释效果明显,扩散系数为2.109×10^-9 cm^2/s,延缓TBHQ的释放时间,维持其在运输和存储时的有效浓度。
The pore size of mesoporous silica was modified by organic functional groups to reduce the release rate of antioxidants adsorbed on mesoporous silica on active packaging film and prolong the storage period and shelf life of fat foods.The classical two-dimensional hexagonal structure mesoporous silica MCM-41 was synthesized by using tetradecyltrimethylammonium bromide as template.The post-modification grafting method was based on the silanol group and organic functional group,7-[(3-triethoxysilyl)propoxy]coumarin(TCP)combination,on the surface of silicon oxide.The food grade tert-butyl hydroquinone was adsorbed on the assembly and blended with the resin,and film was formed on a multilayer coextrusion casting machine.Specific surface area,pore size,crystal structure,morphology and skeleton vibration heat of mesoporous silica was determined by using fully automatic surface and porosity analyzer,X-ray diffractometer,transmission electron microscope,Fourier infrared spectrometer and thermogravimetric analyzer stability.The pore size of the silica modified by the coumarin derivative increased from the original 2.717 to 2.384 nm,and the long-range order of the pores did not collapse.TCP was successfully grafted onto MCM-41.The free radical scavenging rate of the film modified by coumarin derivative reached 89.76%.Compared with unmodified silica,the controlled release effect was obvious,and the diffusion coefficient was 2.109×10^-9 cm^2/s,which delayed the release time of TBHQ and maintained its Effective concentration at the time of transportation and storage.
作者
党金贵
丘晓琳
唐亚丽
卢立新
唐有凯
理挪
DANG Jingui;QIU Xiaolin;TANG Yali;LU Lixin;TANG Youkai;LI Nuo(School of Mechanical Engineering, Jiangnan University, Wuxi 214122,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology,Wuxi 214122,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2019年第9期9174-9180,共7页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51503084,31671909)
江苏省食品先进制造装备技术重点实验室开放课题资助项目(FM-201606)
无锡市科技发展资金资助项目(WX18ⅡAG722)
江苏省研究生科研与实践创新计划资助项目(SJCX18_0628)
关键词
介孔氧化硅
特丁基对苯二酚
孔径
薄膜
控释
mesoporous silica
tert-butyl hydroquinone
pore size
film
controlled release
