Mi Fu, Zhengzhong Wu, Xiaobo Liu, Yuwei Yuan, Xuejun Lai, Kan Yue
{"title":"Highly stretchable ionic hydrogels with enhanced thermoelectric performance and flame retardancy for intelligent fire protection","authors":"Mi Fu, Zhengzhong Wu, Xiaobo Liu, Yuwei Yuan, Xuejun Lai, Kan Yue","doi":"10.1039/d4ta05396f","DOIUrl":null,"url":null,"abstract":"Fire disasters pose a significant threat to life and property worldwide, underscoring the urgent necessity for advanced fire prevention technologies. In the field of intelligent fire protection materials, thermoelectric fire-resistant materials have garnered considerable attention due to their high sensitivity and the distinct advantage of not requiring an external power supply. This feature endows them with high responsiveness and energy efficiency in detecting and responding to fire incidents, thereby enhancing overall safety measures. In this study, we develop a series of highly stretchable ionic hydrogels with exceptional thermoelectric properties and flame retardancy for intelligent fire protection applications. Through a simple one-pot photopolymerization process, polyacrylic acid (PAA) and polyethylene glycol (PEO) were combined with sodium dihydrogen phosphate (SDP) to form a robust hydrogen-bonded ionic hydrogel network. The resulting PAA-PEO-SDP ionic hydrogels demonstrated an impressive elongation at break up to 4270% and a very high ionic Seebeck coefficient of 24.7 mV K<small><sup>−1</sup></small>. The incorporation of the phosphorus salt enhanced flame retardancy to reach the UL-94 V-0 rating and significantly increased the oxygen index of encapsulated wood from 27% to 54%. Moreover, as a fire-warning device, it could rapidly generate an output voltage of <em>ca.</em> 50 mV within 1.5 s upon exposure to fire, showcasing potential for autonomous fire prevention systems. This work highlights the synergistic integration of mechanical flexibility, thermoelectric performance, and fire safety in the development of next-generation intelligent materials for fire protection.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1039/d4ta05396f","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Fire disasters pose a significant threat to life and property worldwide, underscoring the urgent necessity for advanced fire prevention technologies. In the field of intelligent fire protection materials, thermoelectric fire-resistant materials have garnered considerable attention due to their high sensitivity and the distinct advantage of not requiring an external power supply. This feature endows them with high responsiveness and energy efficiency in detecting and responding to fire incidents, thereby enhancing overall safety measures. In this study, we develop a series of highly stretchable ionic hydrogels with exceptional thermoelectric properties and flame retardancy for intelligent fire protection applications. Through a simple one-pot photopolymerization process, polyacrylic acid (PAA) and polyethylene glycol (PEO) were combined with sodium dihydrogen phosphate (SDP) to form a robust hydrogen-bonded ionic hydrogel network. The resulting PAA-PEO-SDP ionic hydrogels demonstrated an impressive elongation at break up to 4270% and a very high ionic Seebeck coefficient of 24.7 mV K−1. The incorporation of the phosphorus salt enhanced flame retardancy to reach the UL-94 V-0 rating and significantly increased the oxygen index of encapsulated wood from 27% to 54%. Moreover, as a fire-warning device, it could rapidly generate an output voltage of ca. 50 mV within 1.5 s upon exposure to fire, showcasing potential for autonomous fire prevention systems. This work highlights the synergistic integration of mechanical flexibility, thermoelectric performance, and fire safety in the development of next-generation intelligent materials for fire protection.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.