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Cellulose Dissolution and InSitu Grafting in a Reversible System using an Organocatalyst and Carbon Dioxide
Song, Longchu1,2; Yang, Yunlong1,2; Xie, Haibo2,3; Liu, Enhui1
关键词Carbon Dioxide Celluloses Organocatalysis Ring-opening Polymerization Sustainable Chemistry
刊名CHEMSUSCHEM
2015-10-12
DOI10.1002/cssc.201500378
8期:19页:3217-3221
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Multidisciplinary
研究领域[WOS]Chemistry
关键词[WOS]RING-OPENING POLYMERIZATION ; IONIC LIQUIDS ; RADICAL POLYMERIZATION ; COPOLYMERS ; NANOMICELLES ; SURFACTANTS ; LACTIDE ; CO2
英文摘要Cellulose is a promising renewable material, but cannot easily be processed homogeneously owing to the stiffness of the molecules and the dense packing of its chains, due to intermolecular hydrogen bonds. Cellulose processability can be improved by chemical modification. The reversible reaction of cellulose with carbon dioxide in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) allows dissolution of cellulose in dimethyl sulfoxide (DMSO). This DMSO solution is an effective medium for grafting l-lactide (LLA) from cellulose by ring-opening polymerization (ROP) under mild conditions, allowing to prepare cellulose-graft-poly(l-lactide) co-polymers with a molar substitution (MSPLLA) of poly(l-lactide) in the range of 0.37-5.32, at 80 degrees C. This makes DBU not only an important reagent to achieve cellulose dissolution, but it also acts as organocatalyst for the subsequent ring-opening polymerization process. Characterization of the structure and thermal properties of the co-polymers by a variety of techniques reveals that they have a single glass-transition temperature (T-g), which decreases with increasing MSPLLA. Thus, the modification results in a transformation of the originally semirigid cellulose into a thermoplastic material with tunable T-g. The carbon dioxide dissolution strategy is an efficient platform for cellulose derivatization by homogeneous organocatalysis.
语种英语
WOS记录号WOS:000362729800005
引用统计
被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/146596
专题中国科学院大连化学物理研究所
作者单位1.Xiangtan Univ, Coll Chem, Minist Educ, Key Lab Environm Friendly Chem & Applicat, Xiangtan, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
3.Guizhou Univ, Dept Polymer Mat & Engn, Coll Mat & Met, Guiyang 550025, Peoples R China
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GB/T 7714
Song, Longchu,Yang, Yunlong,Xie, Haibo,et al. Cellulose Dissolution and InSitu Grafting in a Reversible System using an Organocatalyst and Carbon Dioxide[J]. CHEMSUSCHEM,2015,8(19):3217-3221.
APA Song, Longchu,Yang, Yunlong,Xie, Haibo,&Liu, Enhui.(2015).Cellulose Dissolution and InSitu Grafting in a Reversible System using an Organocatalyst and Carbon Dioxide.CHEMSUSCHEM,8(19),3217-3221.
MLA Song, Longchu,et al."Cellulose Dissolution and InSitu Grafting in a Reversible System using an Organocatalyst and Carbon Dioxide".CHEMSUSCHEM 8.19(2015):3217-3221.
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