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Influence of plasmatic CORONA discharge in dyeing of desized/mercerised fabrics
Rios, M. José; Carneiro, Noémia; Almeida, L.; Souto, A. PedroIf a plasmatic CORONA discharge is applied in desized cotton fabrics, mercerisation is easily integrated in the chain of their wet preparation, meaning better whiteness and darker and cleaner colours in posterior direct dyeing, when compared with a mercerisation done in presence of an adequate wetting agent. This means that CORONA achieves fibre modifications which promote quicker penetration of the caustic sod...
Structural changes in CORONA discharged cotton submitted to mercerization
Carneiro, Noémia; Souto, A. Pedro; Rios, M. JoséThe cleaning and swelling operations in cotton’s pré-treatmemt make it prepared for posterior dyeing and finishing. From those, mercerization is the one able to confer a major increase in overall quality of the fibrous material and consists of a very strong alkaline treatment of the material, which is kept under controlled tension. The properties are changed in the sense of a more intense luster, higher mechani...
Developments in preparation and dyeing of CORONA discharged cellulosic materials
Carneiro, Noémia; Souto, A. Pedro; Nogueira, C.; Rios, M. José; Madureira, A.; Fernandes, F.; Dias, PaulaThe preparation and dyeing of cellulosic fabrics hás important problems such as uniformity of aspect, cleaning efficiency, level of bleaching, conformity and fastness of colours, and ecological impact. Combination of preparation processes can give optimal solutions, regarding economy and ecology, especially if superior quality items are achieved in final products. In fact, high standards concerning whiteness, s...
Quality improvement and shortcut of preparation of CORONA discharged cotton fab...
Carneiro, Noémia; Souto, A. Pedro; Nogueira, C.; Madureira, A.; Rios, M. José; Fernandes, F.; Dias, PaulaTextile industry has an important impact in world economy and consequently on environmental quality of life. Textile processing uses huge amount of water, chemicals and energy and it is quite easy to conclude about the enormous meaning of pollution control and rationalization of energetic demands. CORONA treatment in the wet processing of cotton textile materials has a great potential concerning the improvement...
Characterisation of surface-liquids interaction in textile materials
Carneiro, Noémia; Souto, A. Pedro; Marques, A. T.; Araújo, J.; Reis, J.; Nogueira, C.; Rios, M. JoséInteraction of textile materials with liquids is very important to predict products behavior in different situations going from processing to use conditions, such as aqueous and dry cleaning, tendency to soiling, absorption of sweat, penetration of treatment products, dyeing baths and printing pastes. Cotton hydrophilic and hydrophobic surfaces are analyzed in order to compare the more important types of cotton...
Mechanical properties of cellulase treated fabrics analyzed
Paulo, Artur Cavaco; Rios, M. JoséStudies were intended to show the best parameters for controlling the finishing effects of celluloses as well as propose a new methodology to compare different finishing routes in terms of their mechanical parameters. Wet processing facilities employ this methodology to compare, optimize and implement processes, as well as to select the best parameters for measuring a particular finishing effect.
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