Investigation on recycling and reprocessing ability of self-healing natural rubber based on ionic crosslink network

IF 2 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Pure and Applied Chemistry Pub Date : 2024-08-19 DOI:10.1515/pac-2024-0025

Mohd Hafiz Zainol, Raa Khimi Shuib, Ismail Ibrahim, Fairul Sharin Abd Razak, Noor Faezah Mohd Sani, Trans Dai Lam

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引用次数: 0

Abstract

Natural rubber (NR) is a complex material that is often discarded due to its three-dimensional structure. Recycling of rubber is difficult due to its complex structure, and only 1.7 million tonnes of waste, such as tyres and gloves, are considered recyclable. This study aims to develop self-healing rubber, which allows a product to recover without affecting structural reliability. Commercial NR was ionically crosslinked with zinc thiolate, forming an ionic crosslink network between rubber chains and zinc thiolate ions. The ionic crosslinks allow the rearrangement of rubber molecular chains under external heat, providing self-healing capabilities. The highest ionic crosslink density was found in NR with 35 phr zinc thiolate. The self-healing NR can recover 90 % of its initial properties at room temperature for 10 min and can be reprocessed and recycled three times without compromising its properties. It also shows excellent weldability, making it a promising material for repairing existing rubber products in heavy engineering applications.

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基于离子交联网络的自愈合天然橡胶的回收和再加工能力研究

天然橡胶（NR）是一种复杂的材料，由于其三维结构而经常被丢弃。由于其结构复杂，橡胶的回收利用十分困难，只有 170 万吨轮胎和手套等废物被认为是可回收利用的。本研究旨在开发自愈合橡胶，使产品能够在不影响结构可靠性的情况下进行回收。商用 NR 与硫酸锌进行离子交联，在橡胶链和硫酸锌离子之间形成离子交联网络。离子交联可使橡胶分子链在外部热量作用下重新排列，从而提供自愈能力。含 35 phr 硫醇酸锌的 NR 的离子交联密度最高。在室温下 10 分钟，自愈合 NR 可恢复其 90% 的初始特性，并可进行三次再加工和再循环，而不会影响其特性。它还具有出色的可焊性，是重型工程应用中修复现有橡胶产品的理想材料。

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来源期刊

Pure and Applied Chemistry 化学-化学综合

CiteScore

4.00

自引率

0.00%

发文量

审稿时长

3-8 weeks

期刊介绍： Pure and Applied Chemistry is the official monthly Journal of IUPAC, with responsibility for publishing works arising from those international scientific events and projects that are sponsored and undertaken by the Union. The policy is to publish highly topical and credible works at the forefront of all aspects of pure and applied chemistry, and the attendant goal is to promote widespread acceptance of the Journal as an authoritative and indispensable holding in academic and institutional libraries.