《科学》（20240823出版）一周论文导读

 
《科学》（20240823出版）一周论文导读  
 

 

Science, 23 AUG 2024, VOL 385, ISSUE 6711

《科学》，2024年8月23日，第385卷，6711期

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材料科学Materials Science

Recyclable surgical, consumer, and industrial adhesives of poly(α-lipoic acid)

聚α-硫辛酸助力可回收外科、消费和工业粘合剂

▲ 作者：SUBHAJIT PAL, JISOO SHIN, KELSEY DEFRATES, MUSTAFA ARSLAN, KATELYN DALE, HANNAH CHEN, ET AL.

▲ 链接：https://www.science.org/doi/10.1126/science.ado6292

▲ 摘要：

聚合物粘合剂在许多医疗、消费和工业产品中发挥着重要作用。α-硫辛酸（αLA）聚合物具有满足多用途和环境友好型粘合剂需求的潜力，但其性能受限于自发解聚。

研究组报道了一系列稳定的αLA聚合物粘合剂，可针对各种医疗或非医疗用途量身定制，并以闭环方式可持续获取和回收。

单体组成的微小变化提供了在干燥和潮湿条件下功能良好的压敏粘合剂，以及与传统环氧树脂强度相当的结构粘合剂。αLA外科强力胶成功封闭小鼠羊膜囊破裂，使鼠胎存活率从0提高到100%。

▲ Abstract：

Polymer adhesives play an important role in many medical, consumer, and industrial products. Polymers of α-lipoic acid (αLA) have the potential to fulfill the need for versatile and environmentally friendly adhesives, but their performance is plagued by spontaneous depolymerization. We report a family of stabilized αLA polymer adhesives that can be tailored for a variety of medical or nonmedical uses and sustainably sourced and recycled in a closed-loop manner. Minor changes in monomer composition afforded a pressure-sensitive adhesive that functions well in dry and wet conditions, as well as a structural adhesive with strength equivalent to that of conventional epoxies. αLA surgical superglue successfully sealed murine amniotic sac ruptures, increasing fetal survival from 0 to 100%.

Manufacture and testing of biomass-derivable thermosets for wind blade recycling

生物质衍生热固性材料的制造和测试助力风力叶片回收

▲ 作者：RYAN W. CLARKE, ERIK G. ROGNERUD, ALLEN PUENTE-URBINA, DAVID BARNES, PAUL MURDY, MICHAEL L. MCGRAW, ET AL.

▲ 链接：https://www.science.org/doi/10.1126/science.adp5395

▲摘要：

风能有助于电网脱碳，但风力叶片不可回收，目前的报废管理策略不可持续。

为了解决可持续能源基础设施中材料可回收性的挑战，研究组引入了可扩展的生物质衍生聚酯共价适应性网络和相应的纤维增强复合材料，用于可回收风力叶片制造。通过实验和计算研究（包括9米风力叶片原型的真空辅助树脂转移模塑），研究组证明了这种材料与现有制造技术的良好兼容性，相对于现有材料的优越性能，以及实用的报废化学品可回收性。

最值得注意的是尽管采用了动态交联拓扑结构，但反直觉的蠕变抑制仍优于行业最先进的热固性材料。总体而言，该研究详细介绍了风力叶片制造的诸多方面，包括化学、工程、安全、机械分析、风化和化学可回收性，使生物质衍生、可回收的风力叶片成为现实。

▲ Abstract：

Wind energy is helping to decarbonize the electrical grid, but wind blades are not recyclable, and current end-of-life management strategies are not sustainable. To address the material recyclability challenges in sustainable energy infrastructure, we introduce scalable biomass-derivable polyester covalent adaptable networks and corresponding fiber-reinforced composites for recyclable wind blade fabrication. Through experimental and computational studies, including vacuum-assisted resin-transfer molding of a 9-meter wind blade prototype, we demonstrate drop-in technological readiness of this material with existing manufacture techniques, superior properties relative to incumbent materials, and practical end-of-life chemical recyclability. Most notable is the counterintuitive creep suppression, outperforming industry state-of-the-art thermosets despite the dynamic cross-link topology. Overall, this report details the many facets of wind blade manufacture, encompassing chemistry, engineering, safety, mechanical analyses, weathering, and chemical recyclability, enabling a realistic path toward biomass-derivable, recyclable wind blades.

化学Chemistry

Reductive samarium (electro)catalysis enabled by SmIII-alkoxide protonolysisSmIII

醇盐质子分解实现还原钐（电）催化

▲ 作者：EMILY A. BOYD, CHUNGKEUN SHIN, DAVID J. CHARBONEAU, JONAS C. PETERS AND SARAH E. REISMAN.

▲ 链接：https://www.science.org/doi/10.1126/science.adp5777

▲ 摘要：