摘要
以Mg,Al,La为阳离子,通过共沉淀法构筑Mg-Al-La稀土基水滑石(LRHs),并与剥离后的MoS_(2)纳米片经过静电自组装得到LRHs/MoS_(2)杂化材料,再通过阴离子交换法将硬脂酸(C_(18)H_(36)O_(2))插层至杂化材料得到稀土基C_(18)H_(36)O_(2)-LRHs/MoS_(2)复合材料,并用于改性热塑料聚氨酯(TPU)。结果表明:成功制备了LRHs/MoS_(2)杂化材料及稀土基C_(18)H_(36)O_(2)-LRHs/MoS_(2)复合材料;复合材料有效提升了TPU的极限氧指数,且没有熔融滴落,大部分改性TPU阻燃等级达到UL 94 V-0级。TPU与稀土基C_(18)H_(36)O_(2)-LRHs/MoS_(2)复合材料质量分数分别为97%,3%时,改性TPU的阻燃效果最好,热释放速率峰值降至569 k W/m^(2),总热释放量最低,仅有91.8 MJ/m^(2),烟释放速率峰值、烟释放总量也大幅降低,说明复合材料对TPU起到很好的阻燃抑烟效果。
Mg-Al-La rare earch based hydrotalcite(LRHs)was prepared via coprecipitation with Mg,Al,and La as cations,it was electrostatically self-assembled with exfoliated MoS_(2)nanosheets to obtain LRHs/MoS_(2)hybrid material,and then stearic acid(C_(18)H_(36)O_(2))was intercalated into the hybrid material by anion exchange to obtain rare earth based C_(18)H_(36)O_(2)-LRHs/MoS_(2)composites,which was used to modify thermoplastic polyurethane(TPU).The results show that LRHs/MoS_(2)hybrid material and rare earth based C_(18)H_(36)O_(2)-LRHs/MoS_(2)composites are successfully prepared.The composites effectively improve the limiting oxygen index of TPU without melting dripping,and the flame retardant grades of most modified TPU reach UL 94 V-0.When the mass fraction of TPU and rare earth based C_(18)H_(36)O_(2)-LRHs/MoS_(2)composite materials are 97%and 3%respectively,the flame retardant effect of the modified TPU is the best,with a peak heat release rate of 569 kW/m^(2)and the lowest total heat release of only 91.8 MJ/m^(2).The peak smoke release rate and total smoke production are also significantly reduced,indicating that the composite materials have a good flame retadrant and smoke suppression effect on TPU.
作者
李少权
班建峰
姚棋
Li Shaoquan;Ban Jianfeng;Yao Qi(School of Materials Science and Engineering,Guangdong University of Petroleum and Chemical Technology,Maoming 525000,China)
出处
《合成树脂及塑料》
CAS
北大核心
2023年第5期17-21,35,共6页
China Synthetic Resin and Plastics
基金
广东省普通高校创新团队项目——先进功能材料创新团队(2020KCXTD034)
茂名市科技计划项目(2022038,2023038,2022S024)
广东省普通高校特色创新项目(2021KTSCX081)。
关键词
稀土基材料
硬脂酸
水滑石
二硫化钼
热塑性聚氨酯
阻燃性能
rare earth based material
stearic acid
hydrotalcite
molybdenum disulfide
thermoplastic polyurethane
flame retardancy
