51. Graphene oxide functionalized biomolecules for improved flame retardancy of Polyamide 66 fabrics with intact physical properties.
- Author
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Kundu, Chanchal Kumar, Li, Zhiwei, Li, Xiaohong, Zhang, Zhijun, and Hu, Yuan
- Subjects
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LIGNINS , *GRAPHENE oxide , *POLYAMIDES , *HEAT release rates , *PHYTIC acid , *PHOSPHORUS compounds , *FIREPROOFING agents - Abstract
A plant derived bio-macromolecule namely lignin (L) and a green phosphorus compound like phytic acid (PA) were functionalized with graphene oxide (GO) and subsequently, used to enhance the flame retardant properties of polyamide 66 (PA66) fabrics in a one pot deposition method. Meanwhile, we also considered pure phytic acid and one more bio-derived charring agent like chitosan (CS) to formulate a series of GO-based flame retardant finishing by altering the applied compounds in the formulation. The applied finishing with a minimum loading % (i.e., less than 10%) rarely altered the physical properties (i.e., color, handle and tensile strength, etc.) of treated textiles while provided enhanced thermal stability and added flame retardancy. Thus, a significant increase in limiting oxygen index (LOI) by 27% was received for the GO-lignin and GO-phytic acid modified fabric sample (i.e., PA66-A), indicating the supremacy of graphene-based compound. Furthermore, a substantial reduction in the peak heat release rate (pHRR) by 25% was also noticed for the fabric sample treated with GO-lignin, chitosan and phytic acid (i.e., PA66-D). Additionally, the as prepared finishing exhibited a considerable level of wash durability as a maximum reduction of pHRR by 17% was retained even after 5 washing cycles. Unlabelled Image • GO-functionalized biomolecules were used in developing flame retardant PA66 fabric. • This treatment rarely altered the color, handle and tensile strength of PA66 fabric. • GO-lignin and GO-phytic acid treated PA66 fabric received a LOI of 27%. • PA66 treated with GO-lignin, chitosan and phytic acid showed 25% pHRR reduction. • These flame retardant and thermally stable coatings were wash-durable as well. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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