N‐doped flexible triazine‐based porous polymer for thermal energy storage

• Published in: Journal of applied polymer science 2023-10, Vol.140 (37), p.n/a
• Main Authors: Jiang, Xiaowei, Liu, Zhihong, Tan, Yujiao, Chen, Xiaosong, Huang, Ping, Ma, Libo, Xiong, Xu, Gao, Weibin, Tao, Yu, Lu, Hongxia, Dai, Zheng
• Format: Article
• Language: English
• Subjects: Acetic acid; Adsorption; Composite materials; Energy storage; flexible porous organic polymers; Flexible structures; Latent heat; Materials science; nitrogen atom; Nitrogen atoms; PCM composites; Phase change materials; Polymers; Thermal energy; thermal energy storage
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.54400

Nitrogen atoms has been widely adopted in preparation of porous organic polymers (POPs). In our study, flexible nitrogen porous organic polymers (FNPOPs) with high nitrogen content are synthesized by using acetic acid both as solvent and catalyst. The materials show moderate Brunauer–Emmett–Teller (BET) surface area and outstanding thermal stabilities (Td: 330°C). FNPOP‐2 is prepared into phase change material (PCM) composites by self‐adsorption method. From differential scanning calorimetry (DSC) analysis, the PCM composites show high encapsulation ratio (55.2 wt%) and latent heat (135.7 J g−1) due to flexible structure and high nitrogen atomic content. Furthermore, the thermal energy storage properties of all PCM composites remained after several thermal cycles. In general, FNPOPs have potential applications in phase change materials adsorption and thermal energy storage. Acetic acid is employed as green solvent and catalyst to synthesis flexible nitrogen porous organic polymers (FNPOPs). The flexible structure and favorable thermal stabilities make FNPOPs potential candidates for thermal energy storage. The phase change material (PCM) composites show high load ratio (55.2 wt%) and enthalpy (135.7 J g−1) because of strong interaction between porous skeletons and PCMs.