PDF(Pubmed)
Abstract：
Despite the tremendous progress in the development of functional materials from plastic waste to promote its recycling, only a few examples of hydrogel materials from plastic waste were reported. In this study, microwave-assisted depolymerization of waste PET plastic using polyamine was performed to prepare short aminophthalamide oligomers followed by chemically cross-linking into a hydrogel material. Catalyst-free microwave-assisted aminolysis of PET was completed within 30-40 s, demonstrating high efficiency of the depolymerization reaction. Subsequent epoxy cross-linking of the oligomers yielded a hydrogel with a swelling degree of ca. 92.1 times in pure water. The application of the obtained hydrogel for the removal of copper ions (Cu2+) from water was demonstrated. Efficient complexation of NH2 groups of the hydrogel with Cu2+ resulted in high adsorption capacities of the hydrogel material toward Cu2+ removal, which were the highest at neutral pHs and reached ca. 213 mg/g. The proposed type of environmental material is beneficial owing to its waste-derived nature and functionality that can be applied for the high-efficiency removal of a broad scope of known environmental pollutants.
摘要：
尽管在从塑料废物中开发功能材料以促进其回收利用方面取得了巨大进展，仅报道了来自塑料废物的水凝胶材料的几个例子。在这项研究中,使用多胺对废PET塑料进行微波辅助解聚，以制备短的氨基苯二胺低聚物，然后化学交联成水凝胶材料。PET的无催化剂微波辅助氨解在30-40s内完成，证明了解聚反应的高效率。随后的低聚物的环氧交联产生了溶胀度大约为10的水凝胶。纯净水中的92.1倍。证明了所获得的水凝胶用于从水中去除铜离子(Cu2+)的应用。水凝胶的NH2基团与Cu2的有效络合导致水凝胶材料对Cu2去除的高吸附能力，在中性pH下最高，达到约。213mg/g。所提出的环境材料的类型是有益的,因为其废物来源的性质和功能可用于高效去除广泛范围的已知环境污染物。
