Preparation and characterization of TiO2-coated hollow glass microsphere and its flame-retardant property in thermoplastic polyurethane
Preparation and characterization of TiO2-coated hollow glass microsphere and its flame-retardant property in thermoplastic polyurethane
复制标题
TiO2包覆空心玻璃微珠的制备、表征及其在热塑性聚氨酯中的阻燃性能
DOI：
10.1007/s10973-017-6719-0
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发表时间：
2018
影响因子：
4.4
通讯作者：
Chen Xilei
中科院分区：
文献类型：
--
作者：
Wang Hongzhi;Jiao Chuanmei;Zhao Li;Chen Xilei
本文采用TiO2包覆中空玻璃微球（HGM）的方法制备了一种新型高效无卤阻燃剂HGM@TiO2。采用锥形量热法（CCT）、烟密度法（SDT）、热重分析法（TGA）和傅立叶红外光谱法（FTIR）研究了HGM@TiO 2在热塑性聚氨酯（TPU）中的阻燃抑烟性能。CCT测试结果表明，HGM@TiO2能显著提高TPU复合材料的阻燃性能。添加0.5wt%HGM@TiO2（405 kW m−2）的样品的峰值热释放速率比相同负载量HGM（1117 kW m−2）的样品降低了64%，TPU复合材料的残炭层结构发生了明显变化。SDT结果表明，HGM@TiO2能有效降低试验中的发烟量。热重分析结果表明，HGM@TiO2的加入降低了TPU的起始分解温度，提高了TPU的热稳定性。FTIR结果表明，HGM@TiO2能促进复合材料提前释放出CO2等可燃气体，起到抑制燃烧的作用。根据本研究，可能会有一些新的方法来获得低负载量的阻燃聚合物。
In this paper, a novel and efficient halogen-free flame retardant, HGM@TiO2, was synthesized by coating hollow glass microspheres (HGM) with TiO2. The flame-retardant and smoke suppression properties of HGM@TiO2in thermoplastic polyurethane (TPU) have been investigated using several techniques including cone calorimeter test (CCT), smoke density test (SDT), thermogravimetric analysis (TGA) and fourier infrared, respectively. The CCT results showed that HGM@TiO2could greatly improve the flame-retardant properties of TPU composites. The peak heat release rate of the sample with 0.5 wt% HGM@TiO2(405 kW m−2) was reduced by 64% compared with the sample with the same loading HGM (1117 kW m−2), and the structure of char residue layer of TPU composites was obviously changed. The SDT results showed that HGM@TiO2could effectively decrease the amount of smoke production in the test. Furthermore, the TGA results indicated that HGM@TiO2could decrease the initial decomposition temperature and improve the thermal stability of TPU. And the FTIR results revealed that HGM@TiO2could promote the composites to release inflammable gas such as CO2earlier to suppress the combustion. According to this study, there may be some new methods to obtain flame-retardant polymer with low loading level.