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Facile Strategy for the Biomimetic Heterogeneous Design of Elastomers with Mechanical Robustness, Malleability, and Functionality
ACS Macro Letters ( IF 5.1 ) Pub Date : 2019-12-20 , DOI: 10.1021/acsmacrolett.9b00845 Jing Huang 1 , Shaoxin Kong 1 , Zhenghai Tang 1 , Siwu Wu 1 , Baochun Guo 1 , Liqun Zhang 2
ACS Macro Letters ( IF 5.1 ) Pub Date : 2019-12-20 , DOI: 10.1021/acsmacrolett.9b00845 Jing Huang 1 , Shaoxin Kong 1 , Zhenghai Tang 1 , Siwu Wu 1 , Baochun Guo 1 , Liqun Zhang 2
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It remains challenging to simultaneously realize mechanical robustness, malleability, and functionality in elastomers via facile yet efficient methods. Herein, a simple strategy for the biomimetic heterogeneous design is proposed to achieve mechanically strong, malleable, and functionalized elastomers. We demonstrate the strategy by straightforward mechanical mixing of a highly cross-linked vitrimeric elastomer with a homogeneous gum and subsequent curing, resulting in heterogeneous vitrimeric elastomers (hetero-VEs). The hetero-VEs comprise two phases: a hard phase with dense cross-links and a soft matrix with few cross-links, with excellent interface between the two phases. The hard phases can be deformed upon loading, dissipating energy, which significantly improves the overall mechanical performance of the hetero-VEs. When conductive fillers are incorporated into the soft matrix, due to the volume exclusion effect of the hard phases, the resultant hetero-VEs exhibit high conductivity with a small fraction of fillers. In view of the facile and generic preparation process, this strategy should be a promising way to reinforce and functionalize many vitrimeric elastomer systems.
中文翻译：
具有机械鲁棒性、延展性和功能性的弹性体仿生异质设计的简便策略
通过简单而有效的方法同时实现弹性体的机械稳健性、延展性和功能性仍然具有挑战性。在此，提出了一种用于仿生异质设计的简单策略，以实现机械强度高、可延展和功能化的弹性体。我们通过将高度交联的玻璃弹性体与均质胶直接机械混合并随后固化来证明该策略，从而产生异质玻璃弹性体（杂-VE）。异质VEs包含两相：具有密集交联的硬相和具有少量交联的软基质，两相之间具有良好的界面。硬相可以在加载时变形，耗散能量，这显着提高了异质 VE 的整体机械性能。当导电填料掺入软基体中时，由于硬相的体积排阻效应，所得异质 VE 表现出高导电性，且填料含量很少。鉴于简便和通用的制备过程，该策略应该是增强和功能化许多玻璃弹性体系统的有前途的方法。
更新日期：2019-12-20
中文翻译：
具有机械鲁棒性、延展性和功能性的弹性体仿生异质设计的简便策略
通过简单而有效的方法同时实现弹性体的机械稳健性、延展性和功能性仍然具有挑战性。在此，提出了一种用于仿生异质设计的简单策略，以实现机械强度高、可延展和功能化的弹性体。我们通过将高度交联的玻璃弹性体与均质胶直接机械混合并随后固化来证明该策略，从而产生异质玻璃弹性体（杂-VE）。异质VEs包含两相：具有密集交联的硬相和具有少量交联的软基质，两相之间具有良好的界面。硬相可以在加载时变形，耗散能量，这显着提高了异质 VE 的整体机械性能。当导电填料掺入软基体中时，由于硬相的体积排阻效应，所得异质 VE 表现出高导电性，且填料含量很少。鉴于简便和通用的制备过程，该策略应该是增强和功能化许多玻璃弹性体系统的有前途的方法。
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