Effect of annealing-induced interfacial demixing on crystallization of PEO confined in coaxial electrospun nanofibers

Shu Fen Zou; Xiao Shuai Guo; Rui Yang Wang; Bin Fan; Jun Ting Xu; Zhi Qiang Fan

doi:10.1002/app.45760

Effect of annealing-induced interfacial demixing on crystallization of PEO confined in coaxial electrospun nanofibers

Shu Fen Zou
, Xiao Shuai Guo
, Rui Yang Wang
, Bin Fan
, Jun Ting Xu
, Zhi Qiang Fan

Zhejiang University

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Glassy polymer nanofibers with spatially confined poly(ethylene oxide) (PEO) were fabricated by coaxial electrospinning of PEO with polyacrylonitrile (PAN) or polystyrene. The effect of melt-annealing on the crystallization behavior of the confined PEOs was studied using differential scanning calorimetry. It is found that the crystallization behavior of the confined PEOs varies with annealing temperature (T_a), annealing time (t_a), and molecular weight of PEO. Notably, it is observed that the crystallization temperature (T_c) and melting temperature (T_m) of PEO increase with prolongation of t_a, for PEO600K/PAN and PEO2K/PAN coaxial electrospun fibers. This phenomenon can be interpreted by the annealing-induced demixing at the core-sheath interface. After the coaxial electrospinning, the core and sheath of the PEO/PAN coaxial fibers are partially compatible due to the miscible solvents used for the core and sheath polymers. Upon annealing, demixing occurs at the core-sheath interface, leading to improved crystallizability of PEO.

Original language	English
Article number	45760
Journal	Journal of Applied Polymer Science
Volume	135
Issue number	5
DOIs	https://doi.org/10.1002/app.45760
State	Published - 5 Feb 2018
Externally published	Yes

Keywords

crystallization
fibers
surfaces and interfaces

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10.1002/app.45760

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@article{03af629a943b40b6851488c2404c539a,

title = "Effect of annealing-induced interfacial demixing on crystallization of PEO confined in coaxial electrospun nanofibers",

abstract = "Glassy polymer nanofibers with spatially confined poly(ethylene oxide) (PEO) were fabricated by coaxial electrospinning of PEO with polyacrylonitrile (PAN) or polystyrene. The effect of melt-annealing on the crystallization behavior of the confined PEOs was studied using differential scanning calorimetry. It is found that the crystallization behavior of the confined PEOs varies with annealing temperature (Ta), annealing time (ta), and molecular weight of PEO. Notably, it is observed that the crystallization temperature (Tc) and melting temperature (Tm) of PEO increase with prolongation of ta, for PEO600K/PAN and PEO2K/PAN coaxial electrospun fibers. This phenomenon can be interpreted by the annealing-induced demixing at the core-sheath interface. After the coaxial electrospinning, the core and sheath of the PEO/PAN coaxial fibers are partially compatible due to the miscible solvents used for the core and sheath polymers. Upon annealing, demixing occurs at the core-sheath interface, leading to improved crystallizability of PEO.",

keywords = "crystallization, fibers, surfaces and interfaces",

author = "Zou, \{Shu Fen\} and Guo, \{Xiao Shuai\} and Wang, \{Rui Yang\} and Bin Fan and Xu, \{Jun Ting\} and Fan, \{Zhi Qiang\}",

note = "Publisher Copyright: {\textcopyright} 2017 Wiley Periodicals, Inc.",

year = "2018",

month = feb,

day = "5",

doi = "10.1002/app.45760",

language = "英语",

volume = "135",

journal = "Journal of Applied Polymer Science",

issn = "0021-8995",

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TY - JOUR

T1 - Effect of annealing-induced interfacial demixing on crystallization of PEO confined in coaxial electrospun nanofibers

AU - Zou, Shu Fen

AU - Guo, Xiao Shuai

AU - Wang, Rui Yang

AU - Fan, Bin

AU - Xu, Jun Ting

AU - Fan, Zhi Qiang

PY - 2018/2/5

Y1 - 2018/2/5

N2 - Glassy polymer nanofibers with spatially confined poly(ethylene oxide) (PEO) were fabricated by coaxial electrospinning of PEO with polyacrylonitrile (PAN) or polystyrene. The effect of melt-annealing on the crystallization behavior of the confined PEOs was studied using differential scanning calorimetry. It is found that the crystallization behavior of the confined PEOs varies with annealing temperature (Ta), annealing time (ta), and molecular weight of PEO. Notably, it is observed that the crystallization temperature (Tc) and melting temperature (Tm) of PEO increase with prolongation of ta, for PEO600K/PAN and PEO2K/PAN coaxial electrospun fibers. This phenomenon can be interpreted by the annealing-induced demixing at the core-sheath interface. After the coaxial electrospinning, the core and sheath of the PEO/PAN coaxial fibers are partially compatible due to the miscible solvents used for the core and sheath polymers. Upon annealing, demixing occurs at the core-sheath interface, leading to improved crystallizability of PEO.

AB - Glassy polymer nanofibers with spatially confined poly(ethylene oxide) (PEO) were fabricated by coaxial electrospinning of PEO with polyacrylonitrile (PAN) or polystyrene. The effect of melt-annealing on the crystallization behavior of the confined PEOs was studied using differential scanning calorimetry. It is found that the crystallization behavior of the confined PEOs varies with annealing temperature (Ta), annealing time (ta), and molecular weight of PEO. Notably, it is observed that the crystallization temperature (Tc) and melting temperature (Tm) of PEO increase with prolongation of ta, for PEO600K/PAN and PEO2K/PAN coaxial electrospun fibers. This phenomenon can be interpreted by the annealing-induced demixing at the core-sheath interface. After the coaxial electrospinning, the core and sheath of the PEO/PAN coaxial fibers are partially compatible due to the miscible solvents used for the core and sheath polymers. Upon annealing, demixing occurs at the core-sheath interface, leading to improved crystallizability of PEO.

KW - crystallization

KW - fibers

KW - surfaces and interfaces

UR - https://www.scopus.com/pages/publications/85030118269

U2 - 10.1002/app.45760

DO - 10.1002/app.45760

M3 - 文章

AN - SCOPUS:85030118269

SN - 0021-8995

VL - 135

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

IS - 5

M1 - 45760

ER -

Effect of annealing-induced interfacial demixing on crystallization of PEO confined in coaxial electrospun nanofibers

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Keywords

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