A Facile Method of Preparing Highly Porous Polylactide Microfibers

Qingsheng  Liu; Qibing  Yang; Yuqi  Zhou; Mingming  Zhao; Ying  Shen; Fenglei  Zhou; Rong Gong; Bingyao  Deng

doi:10.1002/app.45860

A Facile Method of Preparing Highly Porous Polylactide Microfibers

Qingsheng Liu, Qibing Yang, Yuqi Zhou, Mingming Zhao, Ying Shen, Fenglei Zhou, Rong Gong, Bingyao Deng

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Abstract

Highly porous polylactide (PLA) microfibers with the diameter of about 14 µm are prepared by melt-spinning and stretching core–sheath PLA fibers (CSF) and sequent treatment of ethyl acetate. The resultant pores are regular and elliptical. The average values of length of major axis and minor axis of elliptical pores are around 1 and 0.5 μm, respectively. This new and facile method can prepare porous PLA fibers on industrial scale, and nearly overcome all the shortcomings of melt-spinning and stretching method. In addition, highly porous structure in partially oriented poly(l-lactide) yarn (POY) can be also formed by treating POY using ethyl acetate. The obtained pores are irregular. In addition, the formation mechanism of pore structure in CSF is different with the one in POY. The former is the separation of row-nucleated lamellae induced by stretching while the latter is swelling and subsequent solvent-induced crystallization.

Original language	English
Article number	45860
Journal	Journal of Applied Polymer Science
Volume	135
Issue number	7
Early online date	23 Oct 2017
DOIs	https://doi.org/10.1002/app.45860
Publication status	Published - 15 Feb 2018

Keywords

biopolymers and renewable polymers
fibers
morphology

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10.1002/app.45860

App 20171659_R1Accepted author manuscript, 4.68 MB

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title = "A Facile Method of Preparing Highly Porous Polylactide Microfibers",

abstract = "Highly porous polylactide (PLA) microfibers with the diameter of about 14 µm are prepared by melt-spinning and stretching core–sheath PLA fibers (CSF) and sequent treatment of ethyl acetate. The resultant pores are regular and elliptical. The average values of length of major axis and minor axis of elliptical pores are around 1 and 0.5 μm, respectively. This new and facile method can prepare porous PLA fibers on industrial scale, and nearly overcome all the shortcomings of melt-spinning and stretching method. In addition, highly porous structure in partially oriented poly(l-lactide) yarn (POY) can be also formed by treating POY using ethyl acetate. The obtained pores are irregular. In addition, the formation mechanism of pore structure in CSF is different with the one in POY. The former is the separation of row-nucleated lamellae induced by stretching while the latter is swelling and subsequent solvent-induced crystallization.",

keywords = "biopolymers and renewable polymers, fibers, morphology",

author = "Qingsheng Liu and Qibing Yang and Yuqi Zhou and Mingming Zhao and Ying Shen and Fenglei Zhou and Rong Gong and Bingyao Deng",

year = "2018",

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T1 - A Facile Method of Preparing Highly Porous Polylactide Microfibers

AU - Liu, Qingsheng

AU - Yang, Qibing

AU - Zhou, Yuqi

AU - Zhao, Mingming

AU - Shen, Ying

AU - Zhou, Fenglei

AU - Gong, Rong

AU - Deng, Bingyao

PY - 2018/2/15

Y1 - 2018/2/15

N2 - Highly porous polylactide (PLA) microfibers with the diameter of about 14 µm are prepared by melt-spinning and stretching core–sheath PLA fibers (CSF) and sequent treatment of ethyl acetate. The resultant pores are regular and elliptical. The average values of length of major axis and minor axis of elliptical pores are around 1 and 0.5 μm, respectively. This new and facile method can prepare porous PLA fibers on industrial scale, and nearly overcome all the shortcomings of melt-spinning and stretching method. In addition, highly porous structure in partially oriented poly(l-lactide) yarn (POY) can be also formed by treating POY using ethyl acetate. The obtained pores are irregular. In addition, the formation mechanism of pore structure in CSF is different with the one in POY. The former is the separation of row-nucleated lamellae induced by stretching while the latter is swelling and subsequent solvent-induced crystallization.

AB - Highly porous polylactide (PLA) microfibers with the diameter of about 14 µm are prepared by melt-spinning and stretching core–sheath PLA fibers (CSF) and sequent treatment of ethyl acetate. The resultant pores are regular and elliptical. The average values of length of major axis and minor axis of elliptical pores are around 1 and 0.5 μm, respectively. This new and facile method can prepare porous PLA fibers on industrial scale, and nearly overcome all the shortcomings of melt-spinning and stretching method. In addition, highly porous structure in partially oriented poly(l-lactide) yarn (POY) can be also formed by treating POY using ethyl acetate. The obtained pores are irregular. In addition, the formation mechanism of pore structure in CSF is different with the one in POY. The former is the separation of row-nucleated lamellae induced by stretching while the latter is swelling and subsequent solvent-induced crystallization.

KW - biopolymers and renewable polymers

KW - fibers

KW - morphology

U2 - 10.1002/app.45860

DO - 10.1002/app.45860

M3 - Article

SN - 0021-8995

VL - 135

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

IS - 7

M1 - 45860

ER -

A Facile Method of Preparing Highly Porous Polylactide Microfibers

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