Application of Silica Aerogel Carrier via Supercritical Drying for Fragrance Controlled-release  

作　　者：黄龙 ZHANG Jing PANG Denghong XIONG Man BIE Xuan DONG Yawei WANG Ben 罗诚浩 黄荣华 HUANG Long;ZHANG Jing;PANG Denghong;XIONG Man;BIE Xuan;DONG Yawei;WANG Ben;LUO Chenghao;HUANG Ronghua(China Tobacco Hubei Industrial Co.,Ltd,Wuhan,430040,China;School of Power&Mechanical Engineering,Wuhan University,Wuhan,430072,China;School of Materials Science and Engineering,Hubei University,Wuhan,430060,China)

机构地区：[1]China Tobacco Hubei Industrial Co.,Ltd,Wuhan,430040,China [2]School of Power&Mechanical Engineering,Wuhan University,Wuhan,430072,China [3]School of Materials Science and Engineering,Hubei University,Wuhan,430060,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第4期807-814,共8页武汉理工大学学报（材料科学英文版）

摘　　要：Silica aerogel with different hydrophilicities were prepared from tetramethoxysilane,Methymethoxysilane,tetramethoxysilane-propyltrimethoxysilane,or tetramethoxysilane-phenyltrimethoxysilane mixtures via supercritical drying process(labelled as TMOS-AG Me-TMOS-AG,Pr-TMOS-AG,or Ph-TMOS-AG,respectively).Three fragrances,including geraniol,ethyl vanillin,and menthol,were loaded to TMOS-AG.The thermal analysis confirmed all loading fragrances are stable until over 200℃.And among all fragrances,geraniol presented the maximum loading contents(L_(m)).Concentration dependences indicated the geraniol was mono layer absorbed.Py-GC/MS of geraniol in TMOS-AG under both N_(2)and mimic air atmosphere(90%N_(2)and 10%O_(2))confirmed that loaded geraniol could be thermally controlled-released beginning at 200℃.As N_(2)absorption confirmed,even absorption/desorption equilibrium constant(k)was determined mainly by hydrophilicity of silica aerogels,and the maximum loading contents(L_(m))were influenced more by the pore size.Due to mono layered absorption,bigger pores usually give less specific areas and less absorbing sites for geraniol,and then present lower L_(m).

关 键 词：silica aerogel FRAGRANCE CONTROLLED-RELEASE 

分 类 号：TQ427.26[化学工程] TQ651