Wu Ting, Kong Qinghong, Zhang Hongkai, Zhang Junhao
School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China.
School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China.
J Nanosci Nanotechnol. 2018 Feb 1;18(2):1051-1056. doi: 10.1166/jnn.2018.14107.
NiAl layered double hydroxide (NiAl-LDH) was synthesized by co-precipitation method. And sodium dodecyl sulphate (SDS) as modifier was utilized to enlarge the d-spacing of NiAl-LDH to obtain SDS-NiAl-LDH. PP/SDS-NiAl-LDH nanocomposites were prepared with different amount of SDS- NiAl-LDH and PP by melt intercalation method. The results of XRD and TEM confirmed that intercalated and exfoliated-intercalated structures were formed. Compared with pure PP, PP/SDS- NiAl-LDH nanocomposites exhibited high thermal stability and residual to the presence of barrier effect of NiAl-LDH layers. Cone calorimetry analysis indicated that incorporation of SDS-NiAl-LDH obviously improved flame retardancy and smoke suppression properties of PP. With the addition of 5 wt% SDS-NiAl-LDH, the peak heat release rate (PHRR), the total heat release (THR) and smoke production rate (SPR) peak values reduced 32.4%, 16.0%, and 61.5% compared with those of pure PP, which were attributed to the barrier effect and excellent charing performance of SDS-NiAl-LDH.
采用共沉淀法合成了镍铝层状双氢氧化物（NiAl-LDH）。并利用十二烷基硫酸钠（SDS）作为改性剂来扩大NiAl-LDH的层间距，从而获得SDS-NiAl-LDH。通过熔融插层法，用不同含量的SDS-NiAl-LDH与聚丙烯（PP）制备了PP/SDS-NiAl-LDH纳米复合材料。X射线衍射（XRD）和透射电子显微镜（TEM）结果证实形成了插层和剥离-插层结构。与纯PP相比，PP/SDS-NiAl-LDH纳米复合材料表现出高的热稳定性，这归因于NiAl-LDH层的阻隔效应。锥形量热分析表明，加入SDS-NiAl-LDH明显提高了PP的阻燃和抑烟性能。与纯PP相比，添加5 wt% SDS-NiAl-LDH时，热释放速率峰值（PHRR）、总热释放量（THR）和烟生成速率（SPR）峰值分别降低了32.4%、16.0%和61.5%，这归因于SDS-NiAl-LDH的阻隔效应和优异的成炭性能。
