To ensure sustainable use of natural resources and circulation of materials, efficient methods of waste plastic conversion into value chemicals and scenarios for utilization of the latter are increasingly demanded. Here, we propose a method of waste PET bottles conversion to cross-linked hydrogels through PET aminolysis using tri- and tetraamines as a method of plastic waste valorization. Water-soluble oligomeric products of PET aminolysis were cross-linked in water using diglycidyl ether to get mechanically stable hydrogels that show typical polyelectrolyte behavior for polycation. PET-derived hydrogels abundant with amino groups and aromatic moieties were tested as adsorbents for an anionic dye such as Congo Red, and their absorption capacity towards dye was found to be ca. 500 mg/g. Beside demonstrated here application of PET-derived hydrogels for water cleaning from an industrial dye, utilization of such hydrogel materials in fields of environment, agriculture, separation, etc. are also anticipated.

为了确保自然资源的可持续利用和材料的循环，对废塑料转化为有价值化学品的有效方法和后者的利用方案的需求日益增加。在这里，我们提出了一种使用三胺和四胺通过 PET 氨解将废 PET 瓶转化为交联水凝胶的方法，作为塑料废物增值的方法。PET 氨解的水溶性低聚产物在水中使用二缩水甘油醚交联，得到机械稳定的水凝胶，显示出典型的聚阳离子聚电解质行为。测试了富含氨基和芳族部分的 PET 衍生水凝胶作为阴离子染料（如刚果红）的吸附剂，发现它们对染料的吸收能力约为 500 毫克/克。除了这里展示的 PET 衍生水凝胶在工业染料中的水清洗中的应用之外，还预计这种水凝胶材料在环境、农业、分离等领域的应用。