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Dyeability of Polyester and Polyamide Fabrics Employing Citric Acid

Journal of Textile Science and Technology 2017年第3期3卷 31-44页

作者： renee simoes argolo do carmo Luciana Juncioni de Arauz Jorge Marcos Rosa Julia Baruque-Ramos Mauricio de Campos Araujo School of Arts Sciences and Humanities University of Sao Paulo Sao Paulo Brazil Adolfo Lutz Institute Sao Paulo Brazil College of Technology SENAI “Antoine Skaf” Sao Paulo Brazil

The employment of sustainable chemicals, such as citric acid, represents a possibility for the development of textile dyeing processes. This study aimed to analyze the possibility of replacement of acetic acid (commonly used in textile processing) by citric acid in polyester and polyamide 6 dyeing processes. The utilization of citric acid as leveling agent for disperse dyestuffs was also investigated. Dyeing processes in turquoise color for these fabrics were performed employing citric and acetic acid. Color differences between dyeing processes and color fastness to water were evaluated. All the color dyeing differences were not significant and there was no transference in color fastness tests (grade 5). Otherwise, the differences among polyamide dyeing processes could be related to the efficiency of citric acid solution as sequestering agent. Notwithstanding citric acid to be more expensive than acetic acid and the need of previous dissolution by stirring, it could be advantageous for some formulations.

关键词： Citric Acid Acetic Acid Textile Industry Polyester Polyamide Dyeing

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Ecological Costs Applied in the Bleaching of Cotton： A Study for an Optimized Process

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Journal of Chemistry and Chemical Engineering 2013年第7期7卷 633-636页

作者： Rosa Jorge Marcos Tambourgi Elias Basile Santana Jose Carlo Curvelo carmo renee simoes argolo Arafjo Mauricio de Campos College of Chemistry Engineering State University of Campinas Sao Paulo 03008-020 Brazil Post Graduation Department College of Technology Antoine Skaf Sao Paulo 03008-202 Brazil Production Engineering Post Graduation Program Nine o f July University Sao Paulo 5001-100 Brazil Textile and Fashion Post Graduation Program Sao Paulo University S6o Paulo 03828-000 Brazil

The aim of this paper was to study three variables in hydrogen peroxide bleaching of cotton fabrics： the amount of hydrogen peroxide （H2O2）, peroxide stabilizer （Na2SiO3） and the process temperature. The factorial planning of two levels and three factors was done in order to obtain an optimized recipe for subsequent comparison with commons recipes used in industry. Were evaluated the brightness （DL）, energy consumption （dQ）, H2O2 residual （Rox）, processing time and ecological costs.

关键词： Cotton bleaching factorial planning ecological costs.

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