作　　者： ; ; ; ; (孔兴杰）;

机构地区： 大连工业大学

出　　处： 《化工学报》 2013年第S1期73-79,共7页

摘　　要： 使用离子液体1,3-二乙基咪唑磷酸二乙酯盐([EEIM][DEP])为反应溶剂主组分来溶解微晶纤维素进行羟丙基化衍生,微晶纤维素和醚化剂在离子液体中均可形成均相,通过碱化、醚化、酸化及洗涤等步骤制备得到不同取代度的羟丙基纤维素。考察了碱化反应温度、反应原料摩尔比、醚化反应时间及酸化剂的种类对羟丙基纤维素产品的收率和摩尔取代度的影响,并采用红外、核磁、TGA等手段对产品结构进行了表征。 In this work,the ionic liquid N-ethyl-N-ethyl-imidazole diethyl phosphate was used as the main solvent to fully dissolve microcrystalline cellulose(MCC)to achieve hydroxypropylization of MCC.Both MCC and the etherifying agent could be homogeneously disolved in the ionic liquid,and hydroxypropyl cellulose(HPC)was prepared through the alkali treatment,etherification and acidification steps to afford the products of different substitution degree.By adjusting the alkalization temperature,molar ratio of reagents,etherification reaction time and the types of acidifiers,the investigation on the yield and the molar substitution degree of HPC was carried out.The structure of products were characterized by 1 H NMR,FTIR and TGAetc.

关 键 词： 微晶纤维素 羟丙基纤维素 离子液体 溶解 均相

领　　域： [化学工程]