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1.武夷学院生态与资源工程学院,武夷山 354300
2.福建师范大学化学与材料学院,福州 350007
*丁晓红(1985-),女,博士,副教授,主要从事功能高分子材料研究。E-mail:dxh@wuyiu.edu.cn.
纸质出版日期:2022-06-20,
收稿日期:2021-04-28,
修回日期:2021-08-08,
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刘瑞来, 丁晓红, 赵瑨云, 胡家朋, 穆寄林, 付兴平. 溶液相分离制备聚乳酸捆束或微球[J]. 高分子通报, 2022,35(6):54-61.
Rui-lai LIU, Xiao-hong DING, Jin-yun ZHAO, Jia-peng HU, Ji-lin MU, Xing-ping FU. Formation of Poly(L-lactic acid) Bundles or Microspheres by Solution Phase Separation[J]. Polymer Bulletin, 2022,35(6):54-61.
刘瑞来, 丁晓红, 赵瑨云, 胡家朋, 穆寄林, 付兴平. 溶液相分离制备聚乳酸捆束或微球[J]. 高分子通报, 2022,35(6):54-61. DOI: 10.14028/j.cnki.1003-3726.2022.06.006.
Rui-lai LIU, Xiao-hong DING, Jin-yun ZHAO, Jia-peng HU, Ji-lin MU, Xing-ping FU. Formation of Poly(L-lactic acid) Bundles or Microspheres by Solution Phase Separation[J]. Polymer Bulletin, 2022,35(6):54-61. DOI: 10.14028/j.cnki.1003-3726.2022.06.006.
将左旋聚乳酸(PLLA)/乙腈溶液淬火至亚稳态
使其发生液-液相分离
得到PLLA 捆束或微球。通过控制淬火时间
使PLLA从捆束向微球转变。与此同时
随着淬火时间的增加PLLA 从α'-晶型转变为更加有序规整堆积的α-晶型。淬火时间和淬火温度不变的条件下
低浓度有利于形成捆束形貌
而高浓度形成微球形貌。最后讨论了聚乳酸捆束或微球的形成机理。
To prepare poly(L-lactic acid) (PLLA) porous microsphere
the thermally induced phase separation (TIPS) method was applied to quench PLLA/acetonitrile solutions to the metastable state
resulting in liquid-liquid phase separation of the polymer solutions. By controlling the quenching time
the porous microsphere grew from lamellar bundles to microsphere. Meanwhile
with increasing quenching time
the PLLA microsphere transformed from α'- to more stable and compact-packing α-crystal. When the quenching time and temperature were kept constant
solutions with low PLLA concentration were favorable for the formation of bundles
whereas solutions with high PLLA concentration contributed to the formation of microsphere. At last
the mechanism for the formation of PLLA bundles or microspheres was discussed.
左旋聚乳酸多孔微球相分离溶液结晶
Poly(L-lactic acid)Porous microspheresSolution crystallizationPhase separation
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