Preparation, Foaming and Characterization of Poly(l-lactic acid))/Poly(d-lactic acid)-Grafted Graphite Oxide Blends
Preparation, Foaming and Characterization of Poly(l-lactic acid))/Poly(d-lactic acid)-Grafted Graphite Oxide Blends
复制标题
聚（l-乳酸）/聚（d-乳酸）接枝氧化石墨共混物的制备、发泡和表征
DOI：
10.3139/217.3492
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发表时间：
2018-02
影响因子：
1.3
通讯作者：
Zhao YQ
中科院分区：
文献类型：
--
作者：
Xu L. Q.;Zhao Y. Q.;Xu L. Q.;Zhao Y. Q.;Zhao YQ
摘要 将市售聚左旋乳酸（PLLA）与不同含量的氧化石墨烯接枝聚右旋乳酸（GO-g-PDLA）共混，以改性GO为引发剂，通过开环聚合合成。使用超临界二氧化碳作为物理发泡剂，通过变温模式批量制备 PLLA 和 PLLA/GO-g-PDLA 共混泡沫。结果表明，在 PLLA 中添加 GO-g-PDLA 会导致立体络合物 (sc) 微晶的形成。 GO-g-PDLA 含量的增加增强了与 sc 微晶相对应的红外吸收、衍射峰和熔化峰。在PLLA中添加GO-g-PDLA导致泡孔直径减小，泡孔密度增加，膨胀倍数略有变化，这是由于PLLA结晶增强限制了泡孔生长，GO-g-PDLA充当成核点。
Abstract Commercial poly(l-lactic acid) (PLLA) was blended with different contents of graphene oxide-graft-poly(d-lactic acid) (GO-g-PDLA), which was synthesized via ring-opening polymerization using modified GO as initiator. PLLA and PLLA/GO-g-PDLA blend foams were prepared in a batch process via varying-temperature mode using supercritical carbon dioxide as physical foaming agent. The results showed that the addition of GO-g-PDLA in PLLA leads to the formation of stereocomplex (sc)-crystallites. Increase in the GO-g-PDLA content enhances the IR absorption, diffraction peak and melting peak corresponding to the sc-crystallites. The addition of GO-g-PDLA to PLLA leads to the decrease of the cell diameter, increase of the cell density and to a little change in expansion ratio, which is attributed to the fact that the enhancement of PLLA crystallization restricts cell growth and GO-g-PDLA acts as nucleation point.
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影响因子：
4.2
作者：
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通讯作者：
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影响因子：
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