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    何静, 戴林, 李丹, 申越. 纤维素接枝聚乳酸的制备及其降解性研究[J]. 北京林业大学学报, 2014, 36(2): 139-144.
    引用本文: 何静, 戴林, 李丹, 申越. 纤维素接枝聚乳酸的制备及其降解性研究[J]. 北京林业大学学报, 2014, 36(2): 139-144.
    HE Jing, DAI Lin, LI Dan, SHEN Yue.. Preparation and degradation of cellulose-polylactide grafted copolymer[J]. Journal of Beijing Forestry University, 2014, 36(2): 139-144.
    Citation: HE Jing, DAI Lin, LI Dan, SHEN Yue.. Preparation and degradation of cellulose-polylactide grafted copolymer[J]. Journal of Beijing Forestry University, 2014, 36(2): 139-144.

    纤维素接枝聚乳酸的制备及其降解性研究

    Preparation and degradation of cellulose-polylactide grafted copolymer

    • 摘要: 将微晶纤维素溶于1鄄烯丙基鄄3鄄甲基氯代咪唑离子液体中,4鄄二甲氨基吡啶作为催化剂,采用开环聚合的方 法,成功合成了纤维素接枝L鄄聚乳酸和纤维素接枝DL鄄聚乳酸。采用核磁共振、广角X 射线衍射、差示扫描量热等 方法对聚合物进行表征。结果表明:2 种聚合物的玻璃化转变温度分别为45.6 和40.3 0 C,且均为无定形态;聚合 物的降解性随接枝率升高而降低;在酸液、酶液、碱液、PBS 缓冲液和水中,聚合物降解速率依次降低;聚合物具有 良好的降解性能,并且在生物降解材料方面具有潜在的应用前景。

       

      Abstract: Cellulose-graft-poly ( L-lactide ) ( cellulose-g-PLLA ) and cellulose-graft-poly ( DL-lactide ) ( cellulose-g-PDLLA ) were successfully prepared via ring-opening polymerization by using 4-dimethylaminopyridine (DMAP) as an organic catalyst in an ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl). The structure and morphology of the polymer were characterized by nuclear magnetic resonance (NMR), differential scanning calorimetry measurement (DSC) and wide-angle X-ray powder diffraction (WAXD), showing the glass transition temperature (Tg) of these two polymers were 45.6 and 40.3 0 C, respectively, and all of them were amorphous state. The results indicated that materials with low degree of crystallinity showed higher degradability. In contrast, the acid, enzyme, alkaline, phosphate buffered saline ( PBS) and H2 O degradated material decreased the rate of polymer degradation. In addition, high levels of graft degree of this material resulted in a decrease in degradation.

       

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