State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, PR China; Fujian Provincial Key Laboratory of Functional Materials and Applications, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, PR China.
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, PR China.
J Hazard Mater. 2020 Jan 15;382:121028. doi: 10.1016/j.jhazmat.2019.121028. Epub 2019 Aug 15.
The extensive utilization of rigid polyurethane foam (RPUF) as construction insulation material has brought two main troubles to our society: fire risks and toxic hazards. To reduce the fire hazards of RPUF, a layered MoS decorated with CuO nanoparticles was creativity obtained by hydrothermal technology and facile wet chemical treatment for reducing the toxic product formations of polyurethane nanocomposites during combustion. Due to the low weight ratio of CuO attached onto MoS, the resulting CuO-MoS hybrid effectively prevented the MoS nanosheets from restacking. However, the CuO-MoS-M hybrid was produced by increasing content of CuO, which has the characteristic stacked layer structure of MoS. Reduced harmful organic volatiles and the toxic gases (e.g. a respective decrease of ca. 28% and 53% for CO and NO products) were obtained because of synergistic effect between the physical adsorption of MoS and catalysis action of CuO. Notably, the addition of CuO-MoS hybrids led to high char formation of the RPUF nanocomposite, indicating the effectively catalytic carbonization property. In addition, the N-Gas model for predicting fire smoke toxicity was developed and demonstrated. Furthermore, the research offers direct proofs of the negative influence of the stacked MoS on reducing the smoke toxicity for RPUF nanocomposites.
硬质聚氨酯泡沫（RPUF）作为建筑保温材料的广泛应用给我们的社会带来了两个主要问题：火灾风险和有毒危害。为了降低 RPUF 的火灾风险，通过水热技术和简便的湿化学处理，创造性地获得了分层 MoS 上装饰有 CuO 纳米粒子的材料，以减少聚氨酯纳米复合材料在燃烧过程中有毒产物的形成。由于附着在 MoS 上的 CuO 的重量比低，因此所得的 CuO-MoS 混合物有效地阻止了 MoS 纳米片的堆积。但是，通过增加 CuO 的含量来生产 CuO-MoS-M 混合物，它具有 MoS 的层状堆叠结构的特征。由于 MoS 的物理吸附和 CuO 的催化作用之间的协同效应，减少了有害的有机挥发物和有毒气体（例如，CO 和 NO 产物的相应减少分别约为 28％和 53％）。值得注意的是，添加 CuO-MoS 混合物导致 RPUF 纳米复合材料的高残炭形成，表明其具有有效的催化碳化性能。此外，还开发并证明了用于预测火灾烟雾毒性的 N-Gas 模型。此外，该研究为堆叠的 MoS 对降低 RPUF 纳米复合材料的烟雾毒性的负面影响提供了直接证据。
