Engineering of β-Hydroxyl Esters into Elastomer–Nanoparticle Interface toward Malleable, Robust, and Reprocessable Vitrimer Composites,ACS Applied Materials & Interfaces

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Engineering of β-Hydroxyl Esters into Elastomer–Nanoparticle Interface toward Malleable, Robust, and Reprocessable Vitrimer Composites
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-01-12 00:00:00 , DOI: 10.1021/acsami.7b17465
Yingjun Liu ₁ , Zhenghai Tang ₁ , Yi Chen ₁ , Chengfeng Zhang ₁ , Baochun Guo ₁

Affiliation

Rubbers are strategically important due to their indispensable applications in the daily life and high-tech fields. For their real-world applications, the covalent cross-linking, reinforcement, and malleability of rubbers are three important issues because they are closely related to the elasticity, mechanical properties, and recycling of the rubber materials. Herein, we demonstrate a simple way to prepare covalently cross-linked yet recyclable and robust elastomeric vitrimer composites by incorporating exchangeable β-hydroxyl ester bonds into the elastomer–nanoparticle interface using epoxy group-functionalized silica (Esilica) as both cross-linker and reinforcement in carboxyl group-grafted styrene-butadiene rubber (CSBR). The Esilica-cross-linked CSBR composites exhibit promising mechanical properties due to the covalent linkages in the interface and fine silica dispersion in the matrix. In addition, the interface can undergo dynamic reshuffling via transesterification reactions to alter network topology at high temperatures, conferring the resulting composites the ability to be reshaped and recycled.

中文翻译：

将β-羟基酯工程化为可延展，坚固和可再加工的微晶复合材料的弹性体-纳米粒子界面

橡胶由于在日常生活和高科技领域中不可缺少的应用而具有重要的战略意义。对于它们的实际应用，橡胶的共价交联，补强和延展性是三个重要的问题，因为它们与橡胶材料的弹性，机械性能和回收密切相关。本文中，我们演示了一种简单的方法，该方法使用环氧基官能化的二氧化硅（Esilica）作为交联剂和增强剂，通过将可交换的β-羟基酯键结合到弹性体-纳米颗粒界面中来制备共价交联但又可回收且坚固的弹性体微晶复合物。在羧基接枝的丁苯橡胶（CSBR）中。由于界面中的共价键和基质中良好的二氧化硅分散性，Esilica交联的CSBR复合材料表现出令人鼓舞的机械性能。另外，该界面可通过酯交换反应进行动态改组，以改变高温下的网络拓扑结构，从而使所得复合材料具有重塑和循环利用的能力。

更新日期：2018-01-12

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