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Title: Switchable hydrophobic/hydrophilic surface of electrospun poly (l-lactide) membranes obtained by CF₄microwave plasma treatment

Abstract

A switchable surface that promotes either hydrophobic or hydrophilic wettability of poly (L-lactide) (PLLA) microfibrous membranes is obtained by CF₄ microwave plasma treatment in this paper. The results indicated that both etching and grafting process occurred during the CF₄ plasma treatment and these two factors synergistically affected the final surface wettability of PLLA membranes. When plasma treatment was taken under a relatively low power, the surface wettability of PLLA membranes turned from hydrophobic to hydrophilic. Especially when CF₄ plasma treatment was taken under 100 W for 10 min and 150 W for 5 min, the water contact angle sharply decreased from 116 ± 3.0° to ~0°. According to Field-emission scanning electron microscopy (FESEM) results, the PLLA fibers were notably etched by CF₄ plasma treatment. Combined with the X-ray photoelectron spectroscopy (XPS) measurements, only a few fluorine-containing groups were grafted onto the surface, so the etching effect directly affected the surface wettability of PLLA membranes in low plasma power condition. However, with the plasma power increasing to 200 W, the PLLA membrane surface turned to hydrophobic again. In contrast, the morphology changes of PLLA fiber surfaces were not obvious while a large number of fluorine-containing groups grafted onto the surface. Somore » the grafting effect gradually became the major factor for the final surface wettability.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1]
  1. Tianjin Polytechnic Univ., (China). Key Lab. of Advanced Braided Composites.
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Photon Sciences Directorate
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1193216
Report Number(s):
BNL-108030-2015-JA
Journal ID: ISSN 0169-4332; R&D Project: LS001
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Applied Surface Science
Additional Journal Information:
Journal Volume: 327; Journal Issue: C; Journal ID: ISSN 0169-4332
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CF₄ plasma; hydrophobic-hydrophilic surface; poly (lactic acid); tunable wettability; electrospinning membrane

Citation Formats

Yue, Mengyao, Zhou, Baoming, Jiao, Kunyan, Qian, Xiaoming, Xu, Zhiwei, Teng, Kunyue, Zhao, Lihuan, Wang, Jiajun, and Jiao, Yanan. Switchable hydrophobic/hydrophilic surface of electrospun poly (l-lactide) membranes obtained by CF₄microwave plasma treatment. United States: N. p., 2014. Web. doi:10.1016/j.apsusc.2014.11.149.
Yue, Mengyao, Zhou, Baoming, Jiao, Kunyan, Qian, Xiaoming, Xu, Zhiwei, Teng, Kunyue, Zhao, Lihuan, Wang, Jiajun, & Jiao, Yanan. Switchable hydrophobic/hydrophilic surface of electrospun poly (l-lactide) membranes obtained by CF₄microwave plasma treatment. United States. https://doi.org/10.1016/j.apsusc.2014.11.149
Yue, Mengyao, Zhou, Baoming, Jiao, Kunyan, Qian, Xiaoming, Xu, Zhiwei, Teng, Kunyue, Zhao, Lihuan, Wang, Jiajun, and Jiao, Yanan. Sat . "Switchable hydrophobic/hydrophilic surface of electrospun poly (l-lactide) membranes obtained by CF₄microwave plasma treatment". United States. https://doi.org/10.1016/j.apsusc.2014.11.149. https://www.osti.gov/servlets/purl/1193216.
@article{osti_1193216,
title = {Switchable hydrophobic/hydrophilic surface of electrospun poly (l-lactide) membranes obtained by CF₄microwave plasma treatment},
author = {Yue, Mengyao and Zhou, Baoming and Jiao, Kunyan and Qian, Xiaoming and Xu, Zhiwei and Teng, Kunyue and Zhao, Lihuan and Wang, Jiajun and Jiao, Yanan},
abstractNote = {A switchable surface that promotes either hydrophobic or hydrophilic wettability of poly (L-lactide) (PLLA) microfibrous membranes is obtained by CF₄ microwave plasma treatment in this paper. The results indicated that both etching and grafting process occurred during the CF₄ plasma treatment and these two factors synergistically affected the final surface wettability of PLLA membranes. When plasma treatment was taken under a relatively low power, the surface wettability of PLLA membranes turned from hydrophobic to hydrophilic. Especially when CF₄ plasma treatment was taken under 100 W for 10 min and 150 W for 5 min, the water contact angle sharply decreased from 116 ± 3.0° to ~0°. According to Field-emission scanning electron microscopy (FESEM) results, the PLLA fibers were notably etched by CF₄ plasma treatment. Combined with the X-ray photoelectron spectroscopy (XPS) measurements, only a few fluorine-containing groups were grafted onto the surface, so the etching effect directly affected the surface wettability of PLLA membranes in low plasma power condition. However, with the plasma power increasing to 200 W, the PLLA membrane surface turned to hydrophobic again. In contrast, the morphology changes of PLLA fiber surfaces were not obvious while a large number of fluorine-containing groups grafted onto the surface. So the grafting effect gradually became the major factor for the final surface wettability.},
doi = {10.1016/j.apsusc.2014.11.149},
journal = {Applied Surface Science},
number = C,
volume = 327,
place = {United States},
year = {Sat Nov 29 00:00:00 EST 2014},
month = {Sat Nov 29 00:00:00 EST 2014}
}

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