Title: Low-temperature plasma treatment-assisted layer-by-layer self-assembly for the modification of nanofibrous mats

Authors: Liu, R (Liu, Rong); Dai, JH (Dai, Jinhong); Ma, LL (Ma, Lulu); Chen, JJ (Chen, Jiajia); Shi, XW (Shi, Xiaowen); Du, YM (Du, Yumin); Li, Z (Li, Zhi); Deng, HB (Deng, Hongbing)

Source: JOURNAL OF COLLOID AND INTERFACE SCIENCE Volume: 540 Pages: 535-543 

DOI: 10.1016/j.jcis.2019.01.054 published: MAR 22 2019  

Abstract: To expand the template options of immersive electrostatic layer-by-layer self-assembly (LBL), which requires hydrophilic and protonation substrates, an environmentally friendly and simple plasma pretreatment that enhances the surface charge and wettability of superhydrophobic mats is employed to effectively assist LBL. With positively and negatively charged layers, chitosan (CS) and bovine serum albumin (BSA) were alternately deposited on the surface of polystyrene (PS) mats and oxygen (O-2) plasma-treated mats via electrostatic LBL. After the exposure of plasma gas at different time intervals, the zeta-potential values of the mats were distinct, and the value of the mats was -30.1 mV after treatment via O-2 plasma for 70 s, which was approximately 5 times higher than that of the pristine PS mats. In addition, the average surface roughness (Ra) of the O-2 plasma treated mats was 116.1 +/- 12.6 nm, which was higher than that of the PS mats (87.6 +/- 14.3 nm), due to the plasma etching. The water contact angle of the PS mats was 144.5 +/- 1.4 degrees, which decreased to 0 degrees within 0.33 s after O-2 plasma treatment, proving that the modified PS mats were superhydrophilic. Compared with the mats without plasma treatment, the uniform deposition of CS and BSA on O-2 plasma-treated mats was confirmed by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. Moreover, the mats with an enhanced surface charge and wettability after plasma treatment and LBL processing also exhibited low cell cytotoxicity and facilitated cell growth well. (C) 2019 Elsevier Inc. All rights reserved.

Document Type: Article

Language: English

Authors’ key words: Low-temperature plasma; Enhanced surface charge; Strong wettability; Layer-by-layer; Nanofibers

Addresses of reprint authors:

[Deng, HB] Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bi, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Hubei, Peoples R China

E-mail: hbdeng@whu.edu.cn

Addresses:

[Liu, Rong; Chen, Jiajia; Shi, Xiaowen; Du, Yumin; Deng, Hongbing] Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bi, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Hubei, Peoples R China

[Dai, Jinhong; Li, Zhi] Wuhan Univ, Minist Educ, Sch & Hosp Stomatol, State Key Lab Breeding Base Basic Sci Stomatol Hu, Wuhan 430079, Hubei, Peoples R China.

[Dai, Jinhong; Li, Zhi] Wuhan Univ, Minist Educ, Sch & Hosp Stomatol, Key Lab Oral Biomed, Wuhan 430079, Hubei, Peoples R China

[Ma, Lulu] Southern Univ Sci & Technol SUSTech, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China

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