通过镍铝层状双氢氧化物提高聚丙烯/膨胀型阻燃剂复合材料的热稳定性和阻燃性

Improving the Thermal Stability and Flame Retardancy of PP/IFR Composites by NiAl-Layered Double Hydroxide.

作者信息

Kong Qinghong, Wu Ting, Wang Jiaqi, Liu Hong, Zhang Junhao

机构信息

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.

出版信息

J Nanosci Nanotechnol. 2018 May 1;18(5):3660-3665. doi: 10.1166/jnn.2018.14679.

DOI:10.1166/jnn.2018.14679

PMID:29442880

Abstract

Nickel and aluminum layered double hydroxide (NiAl-LDH) was synthesized via co-precipitation and modified by sodium dodecyl sulfate (SDS), which was marked as NiAl-OLDH. The structure of NiAl-LDH was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). In order to investigate the role of LDH on polymer/intumescent flame retardant (IFR) systems, polypropylene (PP)/IFR/NiAl-OLDH nanocomposites were prepared by melt intercalation. Thermal and flame retardant properties of PP/IFR/NiAl-OLDH nanocomposites were studied. The results indicated that incorporation of NiAl-OLDH in PP/IFR composites significantly improved the thermal stability, flame retardancy and smoke suppression properties. With the addition of 5 wt% NiAl-OLDH, PP/IFR/NiAl-OLDH nanocomposites obtained UL-94 V0 level and the LOI value reached 27.5%. Compared with those of PP/IFR, the peak heat release rate (PHRR), total heat release (THR) and peak smoke production rate (PSPR) values reduced 49%, 10%, and 63%, respectively, which were attributed to the barrier effect and excellent charring performance of NiAl-OLDH.

摘要

通过共沉淀法合成了镍铝层状双氢氧化物（NiAl-LDH），并用十二烷基硫酸钠（SDS）对其进行改性，标记为NiAl-OLDH。采用X射线衍射（XRD）和扫描电子显微镜（SEM）对NiAl-LDH的结构进行了表征。为了研究LDH在聚合物/膨胀型阻燃剂（IFR）体系中的作用，通过熔融插层法制备了聚丙烯（PP）/IFR/NiAl-OLDH纳米复合材料。研究了PP/IFR/NiAl-OLDH纳米复合材料的热性能和阻燃性能。结果表明，在PP/IFR复合材料中加入NiAl-OLDH显著提高了其热稳定性、阻燃性和抑烟性能。添加5 wt%的NiAl-OLDH时，PP/IFR/NiAl-OLDH纳米复合材料达到了UL-94 V0级，极限氧指数（LOI）值达到27.5%。与PP/IFR相比，其峰值热释放速率（PHRR）、总热释放量（THR）和峰值产烟速率（PSPR）分别降低了49%、10%和63%，这归因于NiAl-OLDH的阻隔效应和优异的成炭性能。