Nucleation of Poly(lactide) on the Surface of Different Fibers

doi:10.1021/acs.macromol.9b01078

CORC > 化学研究所 > 中国科学院化学研究所

	Nucleation of Poly(lactide) on the Surface of Different Fibers
	Wang, Bao; Wen, Tao; Zhang, Xiuqin; Tercjak, Agnieszka; Dong, Xia; Mueller, Alejandro J.; Wang, Dujin; Cavallo, Dario
刊名	MACROMOLECULES
	2019-08-27
卷号	52 期号:16 页码:6274-6284
ISSN号	0024-9297
DOI	10.1021/acs.macromol.9b01078
英文摘要	The nucleation process of poly(lactide) (PLA) on a series of fibers was studied by means of in situ polarized optical microscope during crystallization. Several synthetic and natural fibers (polyethylene terephthalate, carbon, Kevlar, glass, hemp, linen, and cellulose) were employed and compared to custom-spun fiber of stereocomplex (SC) enantiomeric PLA blend. Meaningful differences in the nucleating ability toward PLA could be found for all of the considered fibers. SC PLA fibers display extremely high nucleating efficiency, with the development of a continuous transcrystalline morphology on their surface, up to high crystallization temperatures. Quantitative measurement of the nucleation rate allowed a comparison of the different fiber substrates in the light of classical heterogeneous nucleation theory, by considering the interfacial free-energy difference parameter, Delta sigma, directly related to the nucleation barrier. The topography of the fibers surface was investigated by atomic force microscopy and tentatively related to the measured nucleation ability. While a general effect of surface roughness on lowering the heterogeneous nucleation energy barrier can be deduced, relevant deviations can be observed, in particular for carbon and SC PLA fibers. The different fiber wettability by PLA melt suggests that chemical interactions between the substrate and crystallizing polymer also play a meaningful role in promoting the nucleation, although this aspect is generally disregarded in the literature-in favor of surface roughness. Moreover, the specific surface topography is shown to largely affect the density of available nucleation sites along the fiber. To the best of our knowledge, this latter aspect has been neglected in previous studies on fiber-induced polymer nucleation, and deserves further investigation.
语种	英语
WOS记录号	WOS:000483437500025
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/82637]
专题	中国科学院化学研究所
作者单位	Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wang, Bao,Wen, Tao,Zhang, Xiuqin,et al. Nucleation of Poly(lactide) on the Surface of Different Fibers[J]. MACROMOLECULES,2019,52(16):6274-6284.
APA	Wang, Bao.,Wen, Tao.,Zhang, Xiuqin.,Tercjak, Agnieszka.,Dong, Xia.,...&Cavallo, Dario.(2019).Nucleation of Poly(lactide) on the Surface of Different Fibers.MACROMOLECULES,52(16),6274-6284.
MLA	Wang, Bao,et al."Nucleation of Poly(lactide) on the Surface of Different Fibers".MACROMOLECULES 52.16(2019):6274-6284.