Title: Permanent Flame Retardant Finishing of Textiles by the Photochemical Immobilization of Polyphosphazenes // Proceedings of the Ninth International Seminar on Fire and Explosion Hazards. Vol. 2: 21-26 April 2019, Saint Petersburg, Russia
Creators: Opwis K.; Mayer-Gall T.; Gutmann J. S.
Organization: Deutsches Textilforschungszentrum Nord-West gGmbH; University Duisburg-Essen
Imprint: Saint Petersburg, 2019
Collection: Общая коллекция
Document type: Article, report
File type: PDF
Language: English
DOI: 10.18720/SPBPU/2/k19-105
Rights: Свободный доступ из сети Интернет (чтение, печать, копирование)

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UV-based grafting processes are appropriate tools to improve the surface properties of textile materials without changing the bulk. Based on our previous investigations on the photochemical immobilization of vinyl phosphonic acid, here, a new photochemical method for a permanent flame retardant finishing of textiles is described using allyl-modified linear polyphosphazenes and derivatives. Exemplarily, we show results on the flame-retardant finishing of cotton and cotton/PET blends with allyl polyphosphazene. We used the terminal allyl group for the photo-induced coupling of allyl polyphosphazene on textile substrates. Using our UV technology 20 to 40 weight percent of the functionalized polyphosphazenes can be fixed covalently to different textile substrates. We observed a slight decrease of the fixed polyphosphazene amount after the first washing cycle indicating the removal of non-bonded molecules. After this initial washing step the add-on is stable. Even after six laundering cycles the modified material withstands various standardized flammability tests. In summary, photochemical treatments allow the permanent surface modification of natural and synthetic fibers by irradiating with UV light in the presence of reactive media. We have successfully demonstrated that these procedures are appropriate for the fixation of flame retardants as well. Polyphosphazene modified textiles show high levels of flame retardant performance even after several textile laundering cycles.

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