Structure and Morphology of Poly(lactic acid) Stereocomplex Nanofiber Shish Kebabs
Structure and Morphology of Poly(lactic acid) Stereocomplex Nanofiber Shish Kebabs
复制标题
DOI：
10.1021/acsmacrolett.9b00953
复制
发表时间：
2020-01-01
影响因子：
7.015
通讯作者：
Li, Christopher Y.
中科院分区：
文献类型：
--
作者：
Xie, Qing;Chang, Xiaohua;Li, Christopher Y.
本文报道了含立体复合晶体（SC）串和SC/同晶（HC）串的聚乳酸（PLA）串的形成和结构。为了研究PLA SC和HC形成之间的相互作用，通过结合静电纺丝和受控聚合物结晶获得PLA基NFSK。采用静电纺丝法制备了聚L-乳酸/聚D-乳酸（PLLA/PDLA）共混物纳米纤维，并将其作为纺丝材料。通过孵育方法将第二聚合物（PDLA或PLLA/PDLA共混物）装饰在膜上以形成串层状膜。我们发现，SC和HC串晶可以形成使用SC shish以下的软外延机制，而在所得NFSK的微妙的形态差异揭示了SC核在SC/HC结晶的倾向。
We report the formation and structure of poly(lactic acid) (PLA) nanofiber shish kebabs (NFSKs) containing stereocomplex crystal (SC) shish and SC/homocrystal (HC) kebabs. PLA-based NFSKs were obtained by combining electro-spinning and controlled polymer crystallization in order to investigate the interplay between PLA SC and HC formation. Nanofibers were produced by electrospinning poly(L-lactic acid)/poly(D-lactic acid) (PLLA/PDLA) blends and were used as the shish. A secondary polymer (either PDLA or PLLA/PDLA blends) was decorated on the nanofiber by an incubation method to form kebab lamellae. We show that both SC and HC kebab crystals can be formed using a SC shish following a soft epitaxy mechanism, while the subtle morphological differences in the resultant NFSKs reveal the propensity of SC nuclei in SC/HC crystallization.