Development of Dyeing Natural Textiles in Supercritical Carbon Dioxide

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Supercritical carbon dioxide dyeing has successfully dyed a range of synthetic textiles including polyester, nylon and PLA. However, the dyes used in the process were not applicable to natural fibres due to the differences in polarity. The research focus will be on the development of natural textiles for cotton dyeing in supercritical carbon dioxide using novel disperse reactive dyes to create covalent dye-textile bonds. A present supercritical carbon dioxide dyeing system will be optimized for process evaluation.
Application

Currently, this project is able to apply on the dyeing of natural fibre materials, such as cotton and wool. Through transforming dyestuff, the covalent dye-textile bonds will be created. It is applicable to natural textiles dyeing in supercritical carbon dioxide.
Industry Benefit

Water acts as a medium in traditional dyeing process. The process consumes large amount of water and energy. Its wastewater poses a threat to the environment. Many countries are more concerned about the environment and relevant regulations become more stringent. This dyeing technology can increase the competitiveness of the industry, reduce production costs and waste treatment costs.
Awards
44th International Exhibition of Inventions of Geneva (2016) - Bronze Medal
Project Name (ITF)
Development of dyeing natural textiles in supercritical carbon dioxide
Project Number (ITF)
GHP/065/11TP