Wu Shujuan, Zhu Zhaoqi, Liu Chao, Su Yanning, Wang Fei, Bai Wei, Sun Hanxue, Liang Weidong, Li An
Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050, PR China.
Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050, PR China.
J Colloid Interface Sci. 2021 Mar 15;586:152-162. doi: 10.1016/j.jcis.2020.10.080. Epub 2020 Oct 26.
The development of functional materials with better flame-retardant and thermal insulation properties has attracted considerable attention for energy storage applications in modern society. Here, we describe a facile approach for the preparation of conjugated microporous polymer hollow spheres (CMP-HSs) by using SiO nanoparticles as a template via the Sonogashira-Hagihara cross-coupling reaction. The as-synthesized CMP-HSs have good thermal stability with a thermal decomposition temperature of up to 281 °C, high porosity (the BET specific surface area is measured to be approximately 666 m g) along with lipophilic and hydrophobic characteristics. To further improve their flame retardancy, CMP-HSs were treated with dimethyl phosphonate (DMMP) though an immersion method to prepare the CMP-HSs composite (CMP-HSs-DMMP) flame-retardants. By introducing CMP-HSs-DMMP into the epoxy resin (EP) matrix, the as-prepared EP composites showed excellent flame-retardant properties, e.g., the peak heat release rate (pHRR) and total heat release (THR) value of EP composites containing only 0.2% CMP-HSs-DMMP flame-retardant were 650.9 kW m and 79.4 MJ m respectively, in the range of 0 °C - 650 °C, which are 19.6 ± 2% and 19.1 ± 5% lower than that of pure EP within the same temperature range. Considering the significant enhancement of its flame retardancy with only a slight dosage of CMP-HSs-DMMP, such CMP hollow sphere-based flame-retardant composites may have great potential as functional bulk materials or coatings in a variety of fireproofing applications.
开发具有更好阻燃和隔热性能的功能材料，在现代社会的储能应用中引起了广泛关注。在此，我们描述了一种简便的方法，通过使用SiO纳米颗粒作为模板，经由Sonogashira-Hagihara交叉偶联反应制备共轭微孔聚合物空心球（CMP-HSs）。所合成的CMP-HSs具有良好的热稳定性，热分解温度高达281℃，高孔隙率（BET比表面积测量约为666 m²/g）以及亲脂性和疏水性特征。为进一步提高其阻燃性，通过浸渍法用膦酸二甲酯（DMMP）处理CMP-HSs以制备CMP-HSs复合材料（CMP-HSs-DMMP）阻燃剂。通过将CMP-HSs-DMMP引入环氧树脂（EP）基体中，所制备的EP复合材料表现出优异的阻燃性能，例如，仅含有0.2% CMP-HSs-DMMP阻燃剂的EP复合材料在0℃ - 650℃范围内的峰值热释放速率（pHRR）和总热释放（THR）值分别为650.9 kW/m²和79.4 MJ/m²，比相同温度范围内的纯EP分别低19.6±2%和19.1±5%。考虑到仅用少量CMP-HSs-DMMP就能显著提高其阻燃性，这种基于CMP空心球的阻燃复合材料作为功能块状材料或涂层在各种防火应用中可能具有巨大潜力。
