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[交流] Stereomicrostructure-regulated biodegradable adhesives 已有1人参与

Stereomicrostructure-regulated biodegradable adhesives

立体微结构调节的可生物降解胶粘剂

▲ 作者：ZHEN ZHANG, ETHAN C. QUINN, JACOB K. KENNY, ALEXANDRA GRIGOROPOULOS, JASON S. DESVEAUX, TIFFANY CHEN, LI ZHOU, TING XU, GREGG T. BECKHAM, AND EUGENE Y.-X. CHEN

▲链接：

https://www.science.org/doi/10.1126/science.adr7175

▲摘要：

从胶带到胶水，粘合剂被广泛应用于各种场合。大多数是典型的石油基热固性网络或不可生物降解的热塑性热熔胶。研究者使用一组钇基、镧基和磷基催化剂合成了一系列具有不同分子量、微观结构和战术的聚合物——聚3-羟基丁酸酯（P3HBs）。

非晶聚合物往往更粘，但也更弱，而晶体聚合物在流动和填充表面不规则性方面很差，而这是形成强键的关键。研究者发现，半结晶的富二代P3HB不仅提供了最好的附着力，而且还优于许多商业替代品。由于P3HBs能够由细菌产生，并且可以生物降解，因此有可能以可持续的方式生产这些粘合剂。

▲ Abstract：

From tapes to glues, adhesives are used in a wide range of applications and situations. Most are typically petroleum-based thermoset networks or nonbiodegradable thermoplastic hot melts. Zhang et al. used a set of yttrium-, lanthanum-, and phosphorus-based catalysts to synthesize a series of poly(3-hydroxybutyrate) polymers (P3HBs) with different molecular weights, microstructures, and tacticities. Amorphous polymers tend to be stickier but also weaker, whereas crystalline ones are poor at flowing and filling surface irregularities, which is key to forming a strong bond. The authors found that semicrystalline syndio-rich P3HB not only provides the best adhesion, but can also outperform many commercial alternatives. Because P3HBs are able to be produced by bacteria and can be biodegradable, it may be possible to produce these adhesives in a sustainable way.

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