Metal‐organic frameworks derived ZnO @ MOF @ PZS flame retardant for reducing fire hazards of polyurea nanocomposites

作者：Rongzhen Wang, Yan Chen, Yanyan Liu, Mingliang Ma, Zhouyu Tong, Xilei Chen, Yuxin Bi, Weibo Huang, Zijian Liao, Shuailiang Chen, Xinyi Zhang, Qianqian Li · 发表于：Polymers for Advanced Technologies · 年份：2021 · DOI：10.1002/pat.5462 · 被引用次数：61 · 研究领域：Flame retardant materials and properties、Polymer composites and self-healing、Magnesium Oxide Properties and Applications

Transition metal as flame retardant has attracted intense interests in recent years. In this work, ZnO@MOF@PZS was prepared via hydrothermal and polycondensation methods. ZnO nanoflowers played the role as a template for growth of MOF@PZS and zinc source for formation of MOF. Subsequently, the obtained ZnO@MOF@PZS was mixed into polyurea (PUA) to investigate its flame retardancy and toxicity suppression properties. The cone calorimeter test (CCT) showed that ZnO@MOF@PZS significantly improved the flame retardancy of PUA composites. The addition of 3 wt% ZnO@MOF@PZS into PUA could result in peak heat release rate (PHRR), total heat release (THR) and total CO production (TCO) of 28.30%, 19.59% and 36.65%, respectively. The result of universal testing machine showed that ZnO@MOF@PZS‐add PUA had better mechanical properties. It is notable that the improved flame retardant properties for PUA composites are mainly attributed to ZnO@MOF@PZS promoting the formation of dense char residue.