writer：Hefu Li, Dan Meng, Peng Qi, Jun Sun, Hongfei Li, Xiaoyu Gu, Sheng Zhang
keywords：制备一种新型的杂化粒子(ZIF-8@SEP)降低热塑性聚氨酯的火灾危险性
source：期刊
specific source：Applied Clay Science
Issue time：2022年

Aluminum hypophosphite (AHP) is an effective flame retardant to thermoplastic polyurethane (TPU), but it also results in increase on smoke release caused by the presence of phosphorus groups. In this work, a novel synergistic flame retardant was fabricated from metal organic framework (ZIF-8) and sepiolite (SEP). For the compsosite of TPU/8.0AHP/1.0ZIF-8@SEP, limiting oxygen index (LOI) reached 27.5% and it satisfied the UL-94 V-0 grade. The heat release rate and the total heat release decreased by 78.9% and 39.1% compared with the control TPU respectively. The increased smoke production caused by AHP was partly adsorbed by ZIF-8@SEP, therefore, the sample of TPU/8.0AHP/1.0ZIF-8@SEP showed the lowest smoke release in cone calorimeter test. Unsimilar as other flame retardant, the using of 8.0AHP/1.0 ZIF-8@SEP just brought less than 2.0% loss on tensile strength and 7.8% drop on the elongation at break of TPU. Consequently, the ZIF-8@SEP was documented as excellent synergistic flame retardant for TPU and it brought limited damage on mechanical performance.

次磷酸铝(AHP) 是热塑性聚氨酯 (TPU)的有效阻燃剂，但由于磷基团的存在，它也会导致烟雾释放量增加。在这项工作中，一种新型协同阻燃剂由金属有机骨架(ZIF-8) 和海泡石(SEP)制成。对于TPU/8.0AHP/1.0ZIF-8@SEP复合材料，极限氧指数（LOI）达到27.5%，满足UL-94 V-0级要求。与对照TPU相比，放热率和总放热分别下降了78.9%和39.1%。由 AHP 引起的烟雾增加部分被 ZIF-8@SEP 吸附，因此，TPU/8.0AHP/1.0ZIF-8@SEP 样品在锥形量热仪中的烟雾释放量最低测试。与其他阻燃剂不同的是，使用 8.0AHP/1.0 ZIF-8@SEP 仅使TPU 的拉伸强度损失不到 2.0% ，断裂伸长率下降 7.8%。因此，ZIF-8@SEP 被证明是 TPU 的优异协同阻燃剂，它对机械性能的损害有限。