Xie Xiaoming, Li Runhan, Qiao Yongsheng, Zhang Jiaqi, Zhang Zilin, Xu Xingyu, Yang Jie, Peng Yan-Yu, Chen Yifa, Li Shun-Li, Lan Ya-Qian
Department of Chemistry, Xinzhou Normal University, Xinzhou, Shanxi, China.
Guangdong Provincial Key Laboratory of Carbon Dioxide Resource Utilization, School of Chemistry, South China Normal University, Guangzhou, China.
Nat Commun. 2025 May 26;16(1):4872. doi: 10.1038/s41467-025-60076-x.
Low temperature tolerant adhesive with high flexibility and adhesion strength is highly desired yet challenging owing to the presence of obvious volume shrinkage, increased brittleness, and reduced transmission of mechanical stress at low temperature. Inspired by the cobweb, we hereby develop a kind of flexible adhesive that can be used at low temperature by in-situ polymerization of disulfide bond-based polymer with polyoxometalate. This low-temperature tolerant adhesive presents high flexibility and adhesion strength, good processability and reversible adhesion ability, a wide tolerable temperature range (i.e., -196 to 50 °C), and a long-lasting adhesion effect (>80 days, -196 °C) that is significantly better than commercial solvent-free adhesives. The adhesive can be processed into high-strength cobwebs, injected into tiny tube models, and adhered onto complicated interfaces. Notably, it enables to be kilogram-scale produced through a solvent-free method, holding promise for potential utilization in fields like repairing artifacts or precision instruments with micro-fractures at low temperature.
具有高柔韧性和粘附强度的耐低温粘合剂是非常需要的，但由于存在明显的体积收缩、脆性增加以及低温下机械应力传递减少等问题，开发起来具有挑战性。受蜘蛛网的启发，我们在此通过基于二硫键的聚合物与多金属氧酸盐的原位聚合，开发了一种可在低温下使用的柔性粘合剂。这种耐低温粘合剂具有高柔韧性和粘附强度、良好的加工性能和可逆粘附能力、宽的耐受温度范围（即-196至50°C）以及持久的粘附效果（>80天，-196°C），明显优于市售无溶剂粘合剂。该粘合剂可加工成高强度蜘蛛网，注入微小管模型中，并粘附在复杂界面上。值得注意的是，它能够通过无溶剂方法进行千克级生产，有望在低温下修复有微裂缝的文物或精密仪器等领域得到潜在应用。
