Yang Yuxin, Wang Ruiping, Leng Yang, Wang Jingchun, Xu Miaojun
Aulin College, Northeast Forestry University, Harbin 150040, China.
Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials, College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China.
Polymers (Basel). 2023 Jul 24;15(14):3143. doi: 10.3390/polym15143143.
In miniaturized and integrated electronic devices, thermal potential and fire hazards caused by heat diffusion require an efficient thermal management system with versatile electronic packaging equipment. The flame retardancy was endowed on the surface of carbon nitride after thermal etching (CNNS) containing piperazine pyrophosphate (PPAP) by hydrogen bonding, and the obtained nanosheet was defined as PPAP-CNNS. During solution blending and program-controlled curing, PPAP-CNNS was used as a multifunctional filler to fabricate highly thermoconductive and fire retardant epoxy resin (EP) composites. In line with expectations, the resultant EP composites containing 7 wt% PPAP-CNNS had an exceptional thermal conductivity (TC) of 1.1 W·mK, which was 4.8 times higher than pure EP. Simultaneously, there was a sharp drop in the heat release rate (HRR), total heat release (THR), smoke production rate (SPR), and total smoke production (TSP) compared to pure EP. These reductions were, respectively, 63.7%, 54.2%, 17.9%, and 57.2%. The addition of PPAP-CNNS increased the specific surface area, which increased the heat conduction routes, and also the shape of the compact and solid char layer during burning, protecting the underlying polymer. These improvements to dispersion and surface functionalization were made possible by the compound. These results indicate that the preparation of integrated multi-functional resin described in this study has a wide application.
在小型化和集成化电子设备中，热扩散引起的热势和火灾隐患需要配备多功能电子封装设备的高效热管理系统。通过氢键作用，在含有哌嗪焦磷酸盐（PPAP）的热蚀刻氮化碳（CNNS）表面赋予阻燃性，所得纳米片定义为PPAP-CNNS。在溶液共混和程序控制固化过程中，PPAP-CNNS用作多功能填料，制备高导热和阻燃环氧树脂（EP）复合材料。符合预期的是，含有7 wt%PPAP-CNNS的所得EP复合材料具有1.1 W·mK的优异热导率（TC），比纯EP高4.8倍。同时，与纯EP相比，热释放速率（HRR）、总热释放（THR）、产烟速率（SPR）和总产烟量（TSP）急剧下降。这些降低分别为63.7%、54.2%、17.9%和57.2%。PPAP-CNNS的加入增加了比表面积，增加了热传导路径，并且在燃烧过程中形成了致密且坚固的炭层形状，保护了下层聚合物。该化合物实现了这些分散和表面功能化的改进。这些结果表明，本研究中所述的集成多功能树脂的制备具有广泛的应用。
