Konjac glucomannan (KGM) aerogel was prepared by a facile freeze-drying process, which was used as green sustainable biopolymer matrix to synthesis three-dimensional (3D) network interpenetrated KGM-SiO₂ aerogel with thermal insulation performance and high mechanical properties. Herein, we explored that the potential structure–performance relationship of KGM aerogel between the physical parameters, morphology and thermal insulation. Besides, the preparation conditions of KGM aerogel including concentration of KGM, Na₂CO₃-to-KGM mass ratio were investigated. Meanwhile, the KGM aerogel and KGM-SiO₂ aerogel were characterized using scanning electron microscopy, Fourier transform infrared spectrometer, Brunauer-Emmett-Teller method, thermogravimetric analysis and contact angle test. Results showed that the as-prepared KGM aerogel exhibited excellent thermal insulation performance (λ = 0.021 W m^-1 K^-1) and low bulk density (ρ = 0.030 g cm^-3) when concentration of KGM was 2 wt% and Na₂CO₃-to-KGM mass ratio of 0.12. In order to improve the mechanical properties and high hydrophobicity of biopolymer aerogel, a novel of KGM-SiO₂ aerogel was successful fabricated by incorporating methylsilsesquioxane (MTES) derived SiO₂ into the KGM matrix via the freeze-drying method. The obtained aerogel exhibited remarkable compressive strength (δ_max = 1.65 MPa at 80% strain), high specific surface area of 416.1 m² g⁻¹, high hydrophobicity (θ = 146° for water) and low thermal conductivity of 0.032-0.039 W m^-1 K^-1. Thus, the high-performance KGM-SiO₂ aerogel would be further expand the thermal insulation application in sustainable development and energy-saving building.

魔芋葡甘露聚糖（KGM）气凝胶是通过快速冷冻干燥工艺制备的，被用作绿色可持续生物聚合物基质，以合成具有隔热性能和高机械性能的三维（3D）网络互穿的KGM-SiO ₂气凝胶。在这里，我们探索了KGM气凝胶在物理参数，形态和隔热之间的潜在结构-性能关系。此外，研究了KGM气凝胶的制备条件，包括KGM浓度，Na ₂ CO ₃与KGM的质量比。同时，KGM气凝胶和KGM-SiO ₂使用扫描电子显微镜，傅立叶变换红外光谱仪，Brunauer-Emmett-Teller方法，热重分析和接触角测试对气凝胶进行了表征。结果表明，当KGM的浓度为2 wt％和Na ₂时，所制备的KGM气凝胶具有极好的绝热性能（λ= 0.021 W m ^-1  K ^-1）和较低的堆积密度（ρ= 0.030 g cm ^-3）。CO ₃与KGM的质量比为0.12。为了提高生物聚合物气凝胶的机械性能和高疏水性，通过掺入甲基倍半硅氧烷（MTES）衍生的SiO ₂成功制备了新型KGM-SiO ₂气凝胶。通过冷冻干燥法加入到KGM基质中。将所得到的气凝胶表现出显着的抗压强度（δ_最大 = 1.65兆帕，在80％应变）416.1米的，高比表面积的² 克^-1，高疏水性（θ= 146°为水）和0.032-0.039 W的低导热性m ^-1  K ^-1。因此，高性能的KGM-SiO ₂气凝胶将进一步扩展保温材料在可持续发展和节能建筑中的应用。