Hydrolytic degradation of cellulose-graft-poly(L-lactide) copolymers
文献类型：期刊论文
| 作者 | Yan, Chenghu1,2; Wu, Jin2; Zhang, Jinming2; He, Jiasong2; Zhang, Jun2 |
| 刊名 | POLYMER DEGRADATION AND STABILITY
 |
| 出版日期 | 2015-08-01 |
| 卷号 | 118页码:130-136 |
| 关键词 | Cellulose Poly(L-lactide) Graft copolymer Ionic liquids Hydrolytic degradation |
| 英文摘要 | A series of cellulose-g-poly(L-lactide) (cellulose-g-PLLA) copolymers with 30.65-85.21 % PLLA weight content and the molar substitution of PLLA (MSPLLA) from 0.99 to 12.73 were synthesized via the homogeneous graft-from reaction in 1-allyl-3-methylimidazolium chloride (AmimCI) with 4-dimethylaminopyridine (DMAP) acting as the catalyst. In common organic solvents, the solubility of obtained graft copolymers was better than cellulose and strongly depended on the MSPLLA. The hydrolytic degradation of cellulose-g-PLLA copolymers was investigated in phosphate buffered solution (PBS, pH 7.4) at 37 degrees C. Interestingly, it was found that, when the MSPLLA was below 8.83, the hydrolytic degradation rate of cellulose-g-PLLA copolymers was obviously faster than that of both pristine cellulose and PLLA. Moreover, as the MSPLLA, decreased, the cellulose-g-PLLA copolymers showed a more rapid weight loss, due to its higher hydrophilicity. Both XPS and H-1 NMR analyses demonstrated the degradation occurred mainly at PLLA segments. The morphological observations indicated that, during the hydrolytic degradation, the graft copolymers firstly experienced a surface erosion process, and then the bulk erosion happened. (C) 2015 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2015-11-02 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/27926]  |
| 专题 | 化学研究所_工程塑料实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, BNLMS, KLEP, Inst Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Chenghu,Wu, Jin,Zhang, Jinming,et al. Hydrolytic degradation of cellulose-graft-poly(L-lactide) copolymers[J]. POLYMER DEGRADATION AND STABILITY,2015,118:130-136. |
| APA | Yan, Chenghu,Wu, Jin,Zhang, Jinming,He, Jiasong,&Zhang, Jun.(2015).Hydrolytic degradation of cellulose-graft-poly(L-lactide) copolymers.POLYMER DEGRADATION AND STABILITY,118,130-136. |
| MLA | Yan, Chenghu,et al."Hydrolytic degradation of cellulose-graft-poly(L-lactide) copolymers".POLYMER DEGRADATION AND STABILITY 118(2015):130-136. |
入库方式： OAI收割
来源：化学研究所
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