School of Mechanical and Automotive Engineering, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China.
School of Mechanical and Automotive Engineering, South China University of Technology, Wushan Road 381, Guangzhou 510641, PR China; Tianjin Fire Research Institute of Ministry of Public Security, Tianjin 300381, China.
J Colloid Interface Sci. 2018 Jan 1;509:285-297. doi: 10.1016/j.jcis.2017.09.008. Epub 2017 Sep 7.
Novel nanohybrid (β-Ni(OH)-CNTs) obtained by ultrathin Beta-Nickel hydroxide (β-Ni(OH)) nanosheets grown along multi-walled carbon nanotubes (CNTs) was successfully synthesized and then incorporated into UPR to prepare UPR/β-Ni(OH)-CNTs nanocomposites. Structure of β-Ni(OH)-CNTs nanohybrid was confirmed by X-ray diffraction, scanning electron microscopy measurements. Compared with single CNTs or β-Ni(OH), the dispersion of β-Ni(OH)-CNTs in UPR was improved greatly. And the UPR/β-Ni(OH)-CNTs nanocomposites exhibited significant improvements in flame retardancy, smoke suppression, and mechanical properties, including decreased peak heat release rate by 39.79%, decreased total heat release by 44.87%, decreased smoke release rate by 29.86%, and increased tensile strength by 12.1%. Moreover, the amount of toxic volatile from UPR nanocomposites decomposition was dramatically reduced, and smoke generation was effectively inhibited during combustion. The dramatical reduction of fire hazards can be ascribed to the good dispersion, the catalytic charring effect of β-Ni(OH) nanosheets and physical barrier effect of stable network structure consisted of β-Ni(OH) and CNTs.
通过在多壁碳纳米管（CNTs）上生长超薄β-氢氧化镍（β-Ni（OH））纳米片成功合成了新型纳米杂化材料（β-Ni（OH）-CNTs），然后将其掺入 UPR 中制备 UPR/β-Ni（OH）-CNTs 纳米复合材料。通过 X 射线衍射和扫描电子显微镜测量确认了β-Ni（OH）-CNTs 纳米杂化物的结构。与单根 CNTs 或β-Ni（OH）相比，β-Ni（OH）-CNTs 在 UPR 中的分散性得到了极大改善。并且，UPR/β-Ni（OH）-CNTs 纳米复合材料在阻燃性、抑烟性和机械性能方面表现出显著的提高，包括峰值放热率降低了 39.79%，总放热量降低了 44.87%，烟雾释放率降低了 29.86%，拉伸强度提高了 12.1%。此外，来自 UPR 纳米复合材料分解的有毒挥发性物质的量显著减少，并且在燃烧过程中有效地抑制了烟雾的产生。火灾危险的大幅降低可归因于β-Ni（OH）纳米片的良好分散性、催化碳化作用以及由β-Ni（OH）和 CNTs 组成的稳定网络结构的物理阻隔作用。
