In this work, a novel self-healing natural rubber was developed, and the concepts of mixing both covalent and reversible ionic crosslinks bonds were proposed. The developed materials have the capability of repairing themselves and recovering functionality when they are damaged without the need for detection. Evidence that covalent and reversible ionic crosslinks bonds had occurred was determined by the equilibrium swelling test. The tensile properties of the cured rubbers before and after the healing process were measured using a universal tensile tester to obtain healing efficiency of the materials. The results revealed that the developed self-healing natural rubber was able to recover 60% of its initial mechanical properties in a minute and almost 100% in 10 min at room temperature without the aid of any external resources. Scanning electron microscopy (SEM) showed that the fracture area recuperated with a scar mark after the healing process. Some of the potential products that could benefit from the advantages of these materials include tires, industrial rubber good, cable, hoses, belting, bearing, mounting and foot-wares.

中文翻译：

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室温自修复天然橡胶

在这项工作中，开发了一种新型的自修复天然橡胶，并提出了混合共价和可逆离子交联键的概念。所开发的材料具有自我修复的能力，并且在受损时无需检测即可恢复功能。通过平衡溶胀试验确定共价和可逆的离子交联键已经发生的证据。使用万能拉伸测试仪测量硫化过程之前和之后的硫化橡胶的拉伸性能，以获得材料的硫化效率。结果表明，开发的自修复天然橡胶能够在室温下在一分钟内恢复其初始机械性能的60％，并在室温下在10分钟内恢复其近100％的初始机械性能，而无需任何外部资源。扫描电子显微镜（SEM）显示，愈合过程后骨折部位恢复愈合，并留下疤痕。可以从这些材料的优点中受益的一些潜在产品包括轮胎，工业橡胶制品，电缆，软管，皮带，轴承，安装件和脚垫。