Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Institute of Textiles and Clothing | en_US |
| dc.contributor.advisor | Kan, C. W. (ITC) | - |
| dc.contributor.advisor | Yuen, C. W. M. (ITC) | - |
| dc.contributor.advisor | Yip, J. (ITC) | - |
| dc.creator | Cheung, Hing Fu Channal | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/9543 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | - |
| dc.rights | All rights reserved | en_US |
| dc.title | Non-aqueous color fading effect on cotton with industrial application | en_US |
| dcterms.abstract | This project was conducted under the "Teaching Company Scheme", and the aim of this study was to investigate an eco-methodology, "atmospheric pressure plasma" (ozone) treatment for non-aqueous color fading effect on cotton with industrial application. "Atmospheric pressure plasma" (ozone) technology harnesses the natural bleaching capabilities of ozone gas to give a range of overall and specialty bleach effects with substantially reduced environmental impact. Among many sustainability technologies in the garment industry production process, ozone can be used to clean back-staining from normal washing processes, or to bleach down to a lighter shade, the shade depends on the parameter, it includes gas concentration, moisture content and treatment time, etc. Different parameters combinations generate different degree of color fading. Other than bleaching chemical, the water use reduction is an additional benefit achieved on this study. While the production process contains chemical bleaching or stonewashing, six to seven wash and rinse cycles are gone through. But finishing treatment by ozone will only require two to three cycles. Meanwhile, the conventional finishing applications require an amount of water, sometimes with the desirable temperature for wet finishing which can be replaced by ozone. Therefore, the "atmospheric pressure plasma" (ozone) technology for fading color application could replace some traditional finishing steps with reduces effluent, including the sludge that pumice stones create. The ozone technology can benefit the industrial laundry production in the new era, especially on fading color application. To obtain atmospheric pressure plasma (ozone), oxygen is one of the key elements. The purity of oxygen (O2) will directly affects the ozone concentration produced by the ozone generator, as well as the time on ozone generating. In the G2 waterless washing machine, the built-in oxygen generator can generate power which is enough to supply 96% of pure oxygen. The G2 machine is designed for sampling and bulk production. Therefore, it sets up a preliminary control table for samples versus the bulk production application. Experimental work was carried out to study the relationship between the combinations of the processing parameters, i.e. dye concentration, treatment time, gas concentration and fabric moisture content on the color fading effect induced by atmosphere pressure plasma. Research specimens were gone through a series of analytical studies on color measurement, which were evaluated by use of CIE LAB colorimetric system, K/S sum values, reflectance curve (R%), color levelness (RUI), CIE L*, a*, b* values and ΔE. The results showed that the degree of color fading effect had positive correlation by adjusting the processing parameters. These data would be used for industrial reference on the application to reduce the variance for the desired color fading effects. | en_US |
| dcterms.extent | 162 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2018 | en_US |
| dcterms.educationalLevel | Ph.D. | en_US |
| dcterms.educationalLevel | All Doctorate | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.LCSH | Cotton fabrics | en_US |
| dcterms.LCSH | Bleaching | en_US |
| dcterms.LCSH | Dyes and dyeing | en_US |
| dcterms.accessRights | open access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 991022142754703411.pdf | For All Users | 4.08 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/9543