It is still a great challenge and tough task to recycle of waste PET plastic into high valuable products. This work highlights a new method to synthesize high–performance PET aerogel (PET–A) with outstanding fire resistance and great compressive strength by waste PET beverage bottles. The prepared PET–A can endure high temperatures up to ∼1300 °C, does not burn and even release any smoke. The maximum compressive strength and Young's modulus of PET–A are 29.1 and 40.3 MPa, respectively. The improvement in thermal stability of PET–A can be attributed to the construction of poly aluminum phosphate networks (Al–O–P–O–Al) with the introduction of Al(H₂PO₄)₃ (AHP). Moreover, the formation of polys–associated hydrogen bonds are responsible for the promotion in mechanical strength. This work provided a new method for recycling of waste PET plastic in the preparation of high value aerogel products.

将废旧PET塑料回收成高价值产品仍然是一项巨大的挑战和艰巨的任务。这项工作突出了一种利用废弃 PET 饮料瓶合成具有出色耐火性和高抗压强度的高性能 PET 气凝胶 (PET-A) 的新方法。制备的 PET-A 可以承受高达 1300 °C 的高温，不会燃烧，甚至不会释放任何烟雾。PET-A 的最大抗压强度和杨氏模量分别为 29.1 和 40.3 MPa。PET-A 热稳定性的提高可归因于通过引入 Al(H ₂ PO ₄ ) _{3构建聚磷酸铝网络 (Al-O-P-O-Al)}（层次分析法）。此外，与多晶硅缔合的氢键的形成是提高机械强度的原因。该工作为废旧PET塑料回收制备高价值气凝胶产品提供了一种新方法。