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Intrinsic Room Temperature Self-healing Natural Rubber based on Metal Thiolate Ionic Network
Polymer Testing ( IF 5.1 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.polymertesting.2020.106975
Nuur Laila Najwa Thajudin , Mohd Hafiz Zainol , Raa Khimi Shuib

Abstract An intrinsic self-healing natural rubber featuring reversible metal-thiolate ion networks was fabricated and the corresponding healing mechanism and mechanical properties were presented. The developed materials were able to repair themselves at room temperature upon damage without any external stimuli. Reversible metal-thiolate ion networks were proven to form within the rubber material. These networks dominated the cross-linking system and were identified by Differential Scanning Calorimetry (DSC) and Fourier-transform Infrared Spectroscopy (FTIR). Meanwhile, the quantitative amount of metal-thiolate ion networks and covalent crosslinks was determined by swelling testing. Scanning Electron Microscopy (SEM) results revealed that intermolecular diffusion had occurred at the fracture area of the self-healing samples. The results revealed that the mechanical properties could be 100% regenerated after the broken samples were brought into contact with each other. It was also found that self-healing increased by 60% of the material lifespan. This new material is expected to open up promising avenues for the manufacturing of sustainable rubber products.

中文翻译:

基于金属硫醇盐离子网络的本征室温自修复天然橡胶

摘要 制备了具有可逆金属-硫醇盐离子网络的内在自修复天然橡胶,并提出了相应的修复机制和力学性能。开发的材料能够在室温下在损坏时自我修复,而无需任何外部刺激。可逆的金属硫醇盐离子网络被证明在橡胶材料内形成。这些网络在交联系统中占主导地位,并通过差示扫描量热法 (DSC) 和傅里叶变换红外光谱 (FTIR) 进行鉴定。同时,通过溶胀试验确定金属-硫醇盐离子网络和共价交联的定量。扫描电子显微镜 (SEM) 结果表明,自修复样品的断裂区域发生了分子间扩散。结果表明,破碎的样品相互接触后,力学性能可以100%恢复。还发现自愈能力提高了材料寿命的 60%。这种新材料有望为可持续橡胶产品的制造开辟有前途的途径。
更新日期:2021-01-01
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