The present work concerns the study of preparation processes when this operation is preceded by a CORONA discharge made on dry raw fabrics. The influence in the whiteness degree, hydrophility, starch removal and uniformity of properties of the cellulosic material after preparation is studied.Combined preparation processes are widely used in order to replace solutions where desizing, alkaline boiling and bleaching are individual operations, being a main interest to find the optimal conditions to achieve alkaline oxidative treatments with an uniform and more intense cleaning action.CORONA discharge is able to strongly modify hydrophility of cotton fabrics in raw stage, which is determinant to increase liquids absorption and uniformity of processed fabrics. Results of long-bath, pad-roll, pad-batch and pad-steam bleaching processes in laboratory conditions are compared using or not wetting agent in the recipes and including CORONA discharge as a preparation operation.The transfer of this technology to industry regarding the implementation in textile plant in a very near future is being worked, supported by results as the present ones.
The present work aims to the study of the increase of pickup , together with uniformity degree, concerning the application of reactive dyeing baths by padding in a dry cotton fabric previously treated with CORONA discharge. Dyeing recipes, with and without wetting agent, are compared and advantages of CORONA discharge are analysed. Reactive dyes are used, expecting also to increase washing fastness of the difficult dark colours due to higher penetration of the dye into the core of the fibres when submitted to plasmatic treatment. The use of CORONA discharge intends to modify hydrophility of cotton fabrics even when they are presented to padding in hydrophobic state. A good alternative to wetting agent presence in recipes is found and more uniform and intense dyeings are performed in all cases.
Objective: The present study aimed to analyse the social representations of Psychology in a sample of Portuguese respondents, thus contributing to a better understanding of the social meaning of this scientific area. Method: A free association task was performed by a sample of 205 Portuguese individuals who were given the word “Psychology” as a stimulus. Data were analysed using content analysis, supported by the Max-Qda software. Results: The main results show a greater diversity of representations compared to previous studies. However, the dominant representation in terms of intervention is still the curative clinic and the medical paradigm. Conclusion: This research made it possible to highlight the need for Psychology professionals, and the entities that represent them, to reinforce the visibility and awareness of the community in general, of the application areas both in the scientific and professional context.
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