为达到节能环保，保护环境，实现对固废聚氨酯的研究与利用的目的。利用一缩二丙二醇（PG）和聚乙二醇（PEG）作为双组分二醇的醇解剂，碱金属氢氧化钠作为金属催化剂，蒙脱土（MMT）作为改性剂，利用降解产物重新制备出性能优异的蒙脱土/聚氨酯纳米复合材料，重新制备纳米泡沫材料。并对降解产物和纳米泡沫材料进行一系列测试和分析。结果表明：在m（PG）∶m（PEG）=40∶60，氢氧化钠为1.0 g，蒙脱土加入量为0.3 g时，聚氨酯纳米材料达到最好的降解效果，新制备的纳米泡沫材料的表观密度为0.05 g/cm³，抗压强度为0.41 MPa，此时的纳米泡沫材料导热系数更小，保冷性能更好，达到国家标准的要求。

In order to achieve energy saving and environmental protection, the research and utilization of solid waste polyurethane is realized. Using monocomponent di-propylene glycol (PG) and polyethylene glycol (PEG) as the alcoholysis agent of the two-component diols, alkali metal sodium hydroxide as the metal catalyst, and montmorillonite clay (MMT) as the modifier, the degradation products were utilized to re-prepare montmorillonite/polyurethane nanocomposites with excellent performance, and to re-prepare nano-foam materials. And a series of tests and analyses were carried out on the degradation products and nanofoam materials. The results show that when m(PG): m(PEG) = 40:60, sodium hydroxide is 1.0 g, montmorillonite addition is 0.3 g, the polyurethane nanomaterials can achieve the best degradation effect, the apparent density of the newly prepared nano-foam material is 0.05 g/cm³, the compressive strength is 0.41 MPa. At this time, the nano-foam material has a smaller thermal conductivity and better cold-retaining performance, and meets the requirements of the national standard.