Polymer Research Institute of Sichuan University, the State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China.
Shenzhen Sf Tyson Holding(group) Co., Ltd., Xinghai Avenue, Nanshan Street, Shenzhen-Hong Kong Cooperation Zone, Qianhai, Shenzhen 518000, China.
Int J Biol Macromol. 2024 Oct;277(Pt 3):133967. doi: 10.1016/j.ijbiomac.2024.133967. Epub 2024 Jul 26.
Due to intrinsic defect of fire hazard security, improving the flame retardant capacity of paper is still insufficient in case of precombustion. Herein, we integrate the flame retardant with flame detection performance on the surface of paper, the restricts of graphene oxide (GO) are overcome between high thermoelectric performance and flexibility. A flexible lamellar thermoelectric composite (GO-LA-HP) is constructed through the co-assembly of GO, ascorbic acid (LA), and phenoxycycloposphazene (HP), lamellar GO-LA-HP avoid GO's toughness decline after modification, but also enhance fire sensitivity and flame resistance. The composite could significantly decrease the temperature rise stage (<150 °C), and trigger the fire-warning within 2 s. The hybrid coating composed of phytic acid/phosphoric acid (PyA/PA) and modified thermoelectric GO-LA-HP becomes excellent compatibility on the surface of the modified paper (GPP). GPP is able to extinguish itself immediately after leaving the fire in the vertical combustion, and display the excellent flame resistance. Furthermore, GPP's alarm signal could be timely generated as little as 3 s of contacting the flame, and the response time can exceed 600 s. According to the structure observation and analysis, the related synergistic fire detection reinforcing and flame-retardant mechanisms are also proposed and clarified.
由于存在固有火灾安全隐患，在预燃烧的情况下，提高纸张的阻燃能力仍然不够。在此，我们将具有阻燃和火焰检测性能的阻燃剂整合到纸张表面，克服了氧化石墨烯（GO）在高热电性能和柔韧性之间的限制。通过 GO、抗坏血酸（LA）和苯氧基环磷腈（HP）的共组装，构建了一种灵活的层状热电复合材料（GO-LA-HP），层状 GO-LA-HP 避免了 GO 改性后韧性下降，同时提高了火灾敏感性和阻燃性。该复合材料可显著降低升温阶段（<150°C），并在 2 秒内触发火灾报警。由植酸/磷酸（PyA/PA）和改性热电 GO-LA-HP 组成的混合涂层在改性纸（GPP）表面具有优异的相容性。GPP 在垂直燃烧后离开火焰时能够立即自行熄灭，并显示出优异的阻燃性。此外，GPP 的报警信号在接触火焰 3 秒后即可及时发出，响应时间可超过 600 秒。根据结构观察和分析，还提出并阐明了相关协同的火灾检测增强和阻燃机制。
