摘要
以最新的CO2/DBU/DMSO溶解体系溶解活化纤维素,以?-戊内酯为原料合成纤维素接枝聚?-戊内酯,探索了不同反应时间、反应温度、?-戊内酯与纤维素脱水葡萄糖单元摩尔比、不同有机碱对纤维素取代度的影响,并利用红外谱图对不同反应条件下产物进行表征,具体分析影响因素。对纤维素接枝聚?-戊内酯进行核磁、红外、XRD、TGA、DSC、GPC分析,探索结构与性质的关系。
In this paper, cellulose has been dissolved successfully in newly developed solvent system superbases/DMSO/CO2, on which the cellulose-grafting-poly（σ-valerolactone） was synthesized through ring-opening polymerization of σ-valerolactone initiated by cellulose and in DMSO without adding extra external catalysts. It was believed that the superbases not only participated in the dissolution of cellulose, but also acted as an organocatalyst in the in situ subsequent ring-opening polymerization of σ-valerolactone initiated by cellulose. The effects of the structure of superbases, the mole ratio of σ-valerolactone to cellulose, the reaction time and temperature on the grafting efficiency were studied. The structure and thermochemical properties of the as-prepared cellulose-graft-poly（σ-valerolactone） was characterized by NMR, FT-IR, XRD, TGA, DSC and GPC. The results demonstrated that DBU and TBD presented the best performance among the superbases applied.
作者
高可可
杜杰毫
张丽华
徐芹芹
郭元龙
胡雁鸣
谢海波
GAO Ke-ke;DU Jie-hao;ZHANG Li-hua;XU Qin-qin;GUO Yuan-long;HU Yan-ming;XIE Hai-bo(Department of Polymeric Materials ＆ Engineering,College of Materials ＆ Metallurgy,Guizhou University,Guiyang 550025,China;College of Chemical Engineering,Dalian University of Technology,Dalian 116023,China)
出处
《纤维素科学与技术》
CAS
CSCD
2018年第2期1-8,共8页
Journal of Cellulose Science and Technology
基金
国家自然科学基金(NSFC:21774028
21574030)
贵州省高层次创新型人才培养对象-百层次(黔科合平台人才(2016)5652)
贵州省科学技术基金重点项目((2016)1402)
贵州大学高层次人才引进项目(贵州大学人基(专)合字(2015)01)
关键词
纤维素
戊内酯
开环聚合
溶解
cellulose
σ -valerolactone
ring opening polymerization
dissolution
