abstract
The manufacture of sustainable functional fibers with low environmental foot-print and superior properties is a pressing research issue under the auspices of more sustainable industrial textile processes. In the present study, regenerated cellulose fibers (CellReg) with flame retardancy properties are manufactured by functionalizing regenerated wood pulp fibers (obtained through the dissolu-tion of paper-grade pulp in an ionic liquid followed by regeneration in water) with a natural derived phosphorus compound, namely phytic acid ammonium (PAA). The pale-yellow modified fibers present a phosphorus content up to 1.80% and a uniform and smooth surface morphology. Furthermore, the func-tional cellulose fibers exhibit moderate antioxidant activity (ca. 18.4% of maxi-mum radical scavenging), water contact angles below 92 degrees, as well as good thermal-oxidative stability up to 200 degrees C. The flame-retardant performance of the CellReg/PAA fibers was investigated by the vertical burning test, and as anticipated, the results show a higher flame retardancy with the increasing content of phosphorus, meaning that the fibers ceased to burn before flaming or glowing, even after several flame applications. The accomplished properties validate the potential of these functional fibers of regenerated wood pulp cellu-lose and PAA for application as textile fibers with flame retardancy properties.
keywords
PHYTIC ACID; NANOPARTICLES; FILMS
subject category
Polymer Science
authors
Matos, FS; Fateixa, S; von Weymarn, N; Freire, CSR; Silvestre, AJD; Vilela, C
our authors
Armando Jorge Domingues Silvestre
Full professor
Carla Vilela
Assistant Professor
Carmen Sofia da Rocha Freire Barros
Coordinating Researcher
Sara Fateixa
Post-Doc FellowshipProjects
Green chemicals and technologies for the wood-to-textile value chain. (GRETE)
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
Engineering self-propelled cellulose-based Janus microrobots (Cell4Janus)
acknowledgements
Bio-Based Industries Joint Undertaking, Grant/Award Number: 837527 -GRETE -H2020-BBI-JTI-2018; Fundacao para a Ciencia e a Tecnologia, Grant/Award Numbers: UIDB/50011/2020, UIDP/50011/2020, LA/P/0006/2020, PTDC/BII-BIO/1901/2021, CEECIND/00263/2018, 2021.01571. CEECIND, CEECIND/00464/2017, REF-069-88-ARH-2018