A self-healing and energy-dissipating impact-hardening polymer based on a variety of reversible dynamic bonds

• DOI: 10.1016/j.matdes.2023.112057
• Publication Date: 2023-06-03T01:55:08Z
• Authors: Haolijie Wen; Jie Sun; Kejing Yu; Xiaoning Yang; Xiaoqing Dai; Zhongwei Zhang
• Keywords: Strain hardening exponent; Hardening (computing)

Modern protective materials must not only exhibit an intelligent response behavior, but also possess excellent energy absorption ability. The applicability of shear-stiffening gel is limited because it generally cannot demonstrate good shape stability, strain sensitivity, and dissipation ability simultaneously. In this study, multiple hydrogen bonds metal coordination are incorporated into a shear-hardening to fabricate new impact-hardening polymer (IHP-Cu) with multi-level pathways, thereby achieving balance between rapid self-healing, dissipation. IHP-Cu maintains stable in its natural state, exhibits significant strain-sensitive behavior at different rates, supports weight 400 g room temperature for 10 s after damage. compression cycling tests, efficiency exceeded 90%. the frequency-dependent test (strain rate 0.1 s−1), elastic work viscous increased by 24 12.5 times, respectively, compared those conventional gel. This paper reveals mechanism IHP-Cu, thus providing theoretical basis reference development optimization materials.