Next Article in Journal
Biomass Extraction Using Non-Chlorinated Solvents for Biocompatibility Improvement of Polyhydroxyalkanoates
Next Article in Special Issue
Enhancement of Colour Effects of Dyed-Yarn Mixed Fabrics Using Cramming Motion and Finer Polyester Yarns
Previous Article in Journal
Thermal Decomposition of Kraft Lignin under Gas Atmospheres of Argon, Hydrogen, and Carbon Dioxide
Previous Article in Special Issue
Dopamine-Dyed and Functionally Finished Silk with Rapid Oxidation Polymerization
Article Menu

Export Article

Open AccessArticle
Polymers 2018, 10(7), 730; https://doi.org/10.3390/polym10070730

Protective Bleaching of Camel Hair in a Neutral Ethanol–Water System

1
State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
2
Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
3
Guangdong Esquel Textiles Co., Ltd., Esquel Group, Foshan 528500, China
4
College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, China
5
Hubei Biomass Fibers and Eco-Dyeing & Finishing Key Laboratory, Wuhan Textile University, Wuhan 430200, China
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Received: 5 June 2018 / Revised: 28 June 2018 / Accepted: 30 June 2018 / Published: 3 July 2018
(This article belongs to the Special Issue Polymer Processing for Enhancing Textile Application)
View Full-Text   |   Download PDF [6775 KB, uploaded 3 July 2018]   |  

Abstract

As conventional bleaching under alkaline conditions is chemically damaging to protein fibers, a three-stage protective bleaching process in neutral ethanol–water mixtures was proposed for camel hair using mordanting with ferrous salts, oxidative bleaching with hydrogen peroxide, and reductive bleaching with sodium hydrosulfite. The aim of this work was to improve the whiteness degree of camel hair without substantial tenacity loss. In addition, the roles of ethanol during the bleaching treatment were also examined by characterizing the fibers using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction. The whiteness degree and mechanical properties of camel hair bleached in the neutral ethanol–water system were significantly superior to those of fibers bleached by a conventional method. SEM images showed no visible cracks on the scales of fibers bleached in the ethanol–water system, whereas large grooves were observed on fibers bleached in aqueous solution. TEM images confirmed the positive influence of ethanol on the mordanting process, and FTIR spectra suggested that ethanol reduced the breakage of hydrogen bonds in the fibers during the oxidative bleaching process. These findings indicate the potential of this protective bleaching method for application to a broad range of other natural protein fibers. View Full-Text
Keywords: camel hair; natural fiber; bleaching; ethanol–water mixture; whiteness; mechanical properties camel hair; natural fiber; bleaching; ethanol–water mixture; whiteness; mechanical properties
Figures

Graphical abstract

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).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Xia, L.; Zhang, C.; Xu, W.; Zhu, K.; Wang, A.; Tian, Y.; Wang, Y.; Xu, W. Protective Bleaching of Camel Hair in a Neutral Ethanol–Water System. Polymers 2018, 10, 730.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top