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Polymers 2019, 11(3), 411; https://doi.org/10.3390/polym11030411

Diffusion Mechanism of Aqueous Solutions and Swelling of Cellulosic Fibers in Silicone Non-Aqueous Dyeing System

1
Schhool of Fashion Engineering; Shanghai University of Engineering Science, Shanghai 201620, China
2
Key Laboratory of Fluid Transmission Technology of Zhejiang Province; Zhejiang Sci-Tech University, Hangzhou 310018, China
3
Engineering Research Center for Eco-Dyeing and Finishing of Textiles; Zhejiang Sci-Tech University, Hangzhou 310018, China
*
Authors to whom correspondence should be addressed.
Received: 26 January 2019 / Revised: 22 February 2019 / Accepted: 27 February 2019 / Published: 4 March 2019
(This article belongs to the Special Issue Innovative Functional Textiles)
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Abstract

The main goal of this article is to study the diffusion mechanism of aqueous solutions and the swelling of cellulosic fibers in the silicone non-aqueous dyeing system via fluorescent labeling. Due to non-polar media only adsorbing on the surface of fiber, cellulosic fiber could not swell as a result of the non-polar media. However, because water molecules can diffuse into the non-crystalline region of the fiber, cellulosic fiber could swell by water which was dispersed or emulsified in a non-aqueous dyeing system. To study the diffusion mechanism of an aqueous solution in the siloxane non-aqueous dyeing system, siloxane non-aqueous media was first diffused to the cellulosic fiber because of its lower surface tension. The resulting aqueous solution took more time to diffuse the surface of the cellulosic fiber, because water molecules must penetrate the siloxane non-aqueous media film. Compared with the fluorescent intensity of the fiber surface, the siloxane film could be re-transferred to the dye bath under the emulsification of the surfactant and the mechanical force. Therefore, a longer diffusion time of the aqueous solution ensured the dyeing feasibility for cellulosic fiber in the non-aqueous dyeing system. View Full-Text
Keywords: non-aqueous medium; cellulosic fiber; siloxane; diffusion; swelling non-aqueous medium; cellulosic fiber; siloxane; diffusion; swelling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Pei, L.; Luo, Y.; Gu, X.; Dou, H.; Wang, J. Diffusion Mechanism of Aqueous Solutions and Swelling of Cellulosic Fibers in Silicone Non-Aqueous Dyeing System. Polymers 2019, 11, 411.

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