Leather Solid Waste–Derived Collagen Polypeptide Based Foam for the Sustainable and Clean Production of Foam‐Based Extinguishing Agents

Abstract Herein, a novel leather solid waste–derived collagen polypeptide (CP)–based foam (CF) is developed with good chemical stability, good degradability, considerably poor metal corrosive properties, and high‐efficiency fire‐extinguishing properties. The developed CP is used as a raw material to obtain CF via free‐radical emulsion polymerization using maleic anhydride and oleic acrylic resins. Thereafter, a foam‐based extinguishing agent (FP) with ideal flame retardant properties is synthesized by blending the obtained CF with common and fluorine‐containing (sodium perfluoro nonyloxybenzenesulfonate) surfactants. The prepared materials are characterized using Fourier‐transform infrared spectroscopy, X‐ray diffraction, fire‐extinguishing effect, and other analytical techniques. Results show that the synthesized FP exhibited good thermal and chemical stabilities as well as considerably low cytotoxicity and biotoxicity. A spreading test and preliminary fire‐extinguishing test on an oil surface indicated that the FP has a relatively high spreading speed and good air‐insulation performance. In particular, compared with that of a traditional extinguishing agent, the full spreading time of 7‐FP is 40% lower, with the total extinguishing time being 28 s. Overall, the results suggested that the prepared CP materials are effective extinguishing agents and may have notable value in various fireproofing applications.