PREPARATION AND PERFORMANCE OF HALOGEN-FREE FLAME RETARDANT BIO-BASED POLYURETHANE COMPOSITES WITH CIRCULAR ECONOMY AND NET ZERO TREND

Chen-Feng Kuan, Chin-Lung Chiang, Chane-Yuan Yang, Min-Chin Chung and Hsu-Chiang Kuan
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Chen-Feng Kuan: Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung City, Taiwan, R.O.C.
Chin-Lung Chiang: Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung City, Taiwan, R.O.C.
Chane-Yuan Yang: Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung City, Taiwan, R.O.C.
Min-Chin Chung: Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung City, Taiwan, R.O.C.
Hsu-Chiang Kuan: Department of Chemical and Materials Engineering, Southern Taiwan University of Science and Technology, Tainan City 710, Taiwan

Surface Review and Letters (SRL), 2025, vol. 32, issue 08, 1-5

Abstract: This study involves the surface modification of rice husk (RH) using phosphoric acid, and successfully synthesizing a novel bio-based intumescent flame retardant (ADP-RH) by combining ammonia water. ADP-RH serves as a source of acid, carbon, and gas. When incorporated at only 15wt.% into bio-based thermoplastic polyurethane (TPU) without the use of petrochemical flame retardants, the limiting oxygen index (LOI) of the composite material reaches 29%, and it achieves a V0 flame retardant rating in the UL 94 test. ADP-RH enhances the compatibility between the flame retardant and bio-based TPU, achieving excellent flame retardancy at low concentrations. This work provides valuable insights for the development of bio-based TPU composite materials suitable for various applications.

Keywords: Bio-based thermoplastic polyurethane; rice husk; flame retardant; composite materials; ammonium dihydrogen phosphate (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S0218625X25400116

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