Mechanically strong yet metabolizable supramolecular plastics by desalting upon phase separation

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2024-11-21 DOI:10.1126/science.ado1782

Yiren Cheng, Eiji Hirano, Hao Wang, Motonobu Kuwayama, E. W. Meijer, Hubiao Huang, Takuzo Aida

引用次数: 0

Abstract

Plastics that can metabolize in oceans are highly sought for a sustainable future. In this work, we report the noncovalent synthesis of unprecedented plastics that are mechanically strong yet metabolizable under biologically relevant conditions owing to their dissociative nature with electrolytes. Salt-bridging sodium hexametaphosphate with di- or tritopic guanidinium sulfate in water forms a cross-linked supramolecular network, which is stable unless electrolytes are resupplied. This unusual stability is caused by a liquid-liquid phase separation that expels sodium sulfate, generated upon salt bridging, into a water-rich phase. Drying the remaining condensed liquid phase yields glassy plastics that are thermally reshapable, such as thermoplastics, and usable even in aqueous media with hydrophobic parylene C coating. This approach can be extended to polysaccharide-based supramolecular plastics that are applicable for three-dimensional printing.

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通过相分离脱盐实现机械强度高且可代谢的超分子塑料。

为了实现可持续发展的未来，能够在海洋中进行新陈代谢的塑料备受青睐。在这项工作中，我们报告了一种前所未有的非共价合成塑料，由于其与电解质的离解性质，这种塑料具有机械强度，而且可在生物相关条件下进行新陈代谢。六偏磷酸钠与二或三位硫酸胍在水中的盐桥作用形成了交联的超分子网络，除非再补充电解质，否则这种网络是稳定的。这种不寻常的稳定性是由液相-液相分离造成的，盐桥接时产生的硫酸钠被排出到富水相中。将剩余的冷凝液相干燥后，就得到了可热塑成型的玻璃状塑料（如热塑性塑料），即使在水介质中也可使用疏水性对二甲苯 C 涂层。这种方法可扩展到适用于三维打印的多糖基超分子塑料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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