To develop graphene-based composite aerogels with improved compressive shape stability that suitable for high-temperature applications, poly (m-phenylene isophthalamide, PMIA) with excellent heat resistance and flame retardancy was used as the supporting material. The effects of PMIA content on aerogel morphology, structure, mechanical and thermal properties were discussed. Unlike other polymers, PMIA in the composite aerogels appeared as separate or stacked particles instead of interconnected framework or uniform coatings. Higher PMIA content tended to result in denser aerogels with smaller pores and thinner graphene sheet walls. The densified structure with plenty of PMIA particles incorporated was found to make the aerogel more rigid and less flexible. Their compressive strength therefore was greatly enhanced. Besides, it was also observed that the thermal conductivity of the prepared aerogels increased with the increase of PMIA content. Nevertheless, their thermal conductivity was still <0.045 W m⁻¹ K⁻¹, indicative of considerable thermal insulation ability. Given that, the prepared composite aerogels with enhanced compressive shape stability may have a broad application prospect in thermal insulation.

为了开发适用于高温应用的具有改善的压缩形状稳定性的石墨烯基复合气凝胶，聚（m具有优异的耐热性和阻燃性的-亚苯基间苯二甲酰胺，PMIA）用作支撑材料。讨论了PMIA含量对气凝胶形态，结构，力学和热学性质的影响。与其他聚合物不同，复合气凝胶中的PMIA表现为单独或堆叠的颗粒，而不是相互连接的骨架或均匀的涂层。较高的PMIA含量往往会导致具有较小孔隙和较薄石墨烯薄壁的致密气凝胶。发现结合了许多PMIA颗粒的致密结构使气凝胶更坚硬，更不柔软。因此，它们的抗压强度大大提高了。此外，还观察到，制备的气凝胶的热导率随着PMIA含量的增加而增加。不过，^-1  K ^-1，表示相当大的隔热能力。鉴于此，制备的具有增强的压缩形状稳定性的复合气凝胶在隔热中可能具有广阔的应用前景。