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报道了纤维素萘甲酸酯(CNp)在离子液体中的合成.以1-烯丙基-3-甲基咪唑氯盐离子液体为溶剂,在温和的反应条件下,通过纤维素与1-萘甲酰氯进行均相酰化反应合成了一系列取代度(DS)在0.85~2.61范围的CNp.控制反应温度、反应时间和酰化试剂/纤维素的摩尔比等反应条件,可以方便地调节CNp的DS.采用FTIR、NMR、DSC和TGA等手段表征了产物的结构与热性能.随取代度的增大,CNp的玻璃化转变温度逐渐降低.CNp在多种有机溶剂中具有良好的溶解性能,并表现出优异的溶液成膜性能.CNp在近紫外区有较强吸收,与萘的紫外吸收光谱相似.同时CNp也表现出很好的荧光性能.这种新型的纤维素衍生物有望应用于包装和分离的膜材料、涂料以及某些功能材料等领域.
Reported the synthesis of cellulose naphthoate (CNp) in ionic liquids.Using 1-allyl-3-methylimidazolium chloride ionic liquid as solvent under mild reaction conditions, Naphthoyl chloride was synthesized by a series of CNp with a degree of substitution (DS) in the range of 0.85 ~ 2.61.The reaction conditions such as reaction temperature, reaction time and molar ratio of acylation reagent to cellulose can be conveniently adjusted CNp.The structure and thermal properties of the products were characterized by FTIR, NMR, DSC and TGA.The glass transition temperature (Tg) of CNp decreased with the degree of substitution, and CNp had good dissolution in various organic solvents Performance, and showed excellent film-forming properties of the solution.CNp strong absorption in the near UV region, and naphthalene UV absorption spectrum similar to CNp also showed good fluorescence properties of this new type of cellulose derivatives is expected Used in packaging and separation of membrane materials, coatings and some functional materials and other fields.