Jiao Jian, Shao Yudi, Huang Fenchao, Wang Jia, Wu Zhenzhen
Department of Applied Chemistry, School of Science, Northwestern Polytechnical University Xi' an 710072 P. R. China
RSC Adv. 2018 Dec 5;8(71):40836-40845. doi: 10.1039/c8ra07430e. eCollection 2018 Dec 4.
In this work, we developed a modified calcination and extraction method to obtain controllable micro/mesoporous nanoparticle samples POSS-MPS, which were synthesized through glycidyl polyhedral oligomeric silsesquioxane (G-POSS) grafting with aminopropyl-functionalized mesoporous silica (AP-MPS). The POSS-MPS was introduced into the cyanate ester (CE) matrix to optimize the dielectric properties and enhance the toughness of the POSS-MPS/CE nanocomposite. The structure of the hybrid was characterized by FTIR and SEM. The dispersion properties, mechanical properties, dielectric properties and thermal performance were also studied. The results showed that both the C-POSS-MPS and E-POSS-MPS uniformly distribute in the CE matrix with the content of 0.5-4 wt%. The impact strength increased 52% and 60% separately with 2 wt% C-POSS-MPS and E-POSS-MPS addition respectively. The introduction of E-POSS-MPS particles can significantly decrease the dielectric loss value of the POSS-MPS/CE composites to 0.00498, which is of potential in wave transparent composites and structures.
在本工作中，我们开发了一种改进的煅烧和萃取方法，以获得可控的微/介孔纳米颗粒样品POSS-MPS，其通过缩水甘油基多面体低聚倍半硅氧烷（G-POSS）与氨丙基官能化介孔二氧化硅（AP-MPS）接枝合成。将POSS-MPS引入氰酸酯（CE）基体中，以优化介电性能并提高POSS-MPS/CE纳米复合材料的韧性。通过傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）对杂化材料的结构进行了表征。还研究了其分散性能、力学性能、介电性能和热性能。结果表明，C-POSS-MPS和E-POSS-MPS在CE基体中的含量为0.5-4 wt%时均能均匀分布。分别添加2 wt%的C-POSS-MPS和E-POSS-MPS时，冲击强度分别提高了52%和60%。E-POSS-MPS颗粒的引入可使POSS-MPS/CE复合材料的介电损耗值显著降低至0.00498，这在波透明复合材料和结构方面具有潜力。
