Thermal and mechanical activation of dynamically stable ionic interaction toward self-healing strengthening elastomers

Abstract

Biological tissues can grow stronger after damage and self-healing. However, artificial self-healing materials usually show decreased mechanical properties after repairing. Here, we develop a self-healing strengthening elastomers (SSEs) by engineering...

Strong, Healable, Stimulus‐Responsive Fluorescent Elastomers Based on Assembled Borate Dynamic Nanostructures

“…[ 32,34 ] More importantly, the activation energy is superior than those of elastomers crosslinked by most reported supramolecular interactions, such as hydrogen bonding (≈40 kJ mol –1 ), ionic bonds (≈23 kJ mol –1 ), and metal‐ligand bonds (≈58 kJ mol –1 ). [ 35–37 ] These results forcefully demonstrate that the cross‐linking structures based on the assembled BDN s are more efficient and robust than those of conventional supramolecular crosslinks. Therefore, the bottom‐up assembled BDN s ‐based CEB s is expected to build robust self‐healing materials.…”

Progress in Utilizing Dynamic Bonds to Fabricate Structurally Adaptive Self‐Healing, Shape Memory, and Liquid Crystal Polymers

“…The supramolecular interactions, also named as noncovalent dynamic bonds, include hydrogen bonds, [14][15][16][17][18][19][20][21][22][23][24] metal-ligand coordinations, [25][26][27][28][29][30][31][32][33][34] 𝜋-𝜋 stacking, [35][36][37] hostguest interactions, [38][39][40][41][42][43][44] van der Waals forces, [45][46][47][48] and ionic interactions. [49][50][51][52][53][54][55][56] Generally, the supramolecular interactions are under continuous equilibrium and highly sensitive to temperature, concentrations and solvents/reagents due to the relatively weak bond energy. Thus, the structurally dynamic polymers based on non-covalent dynamic bonds are highly sensitive to a wide range of stimuli.…”

Facile strategy to incorporate amidoxime groups into elastomers toward self-crosslinking and self-reinforcement

“…Until now, many efforts have been made in incorporating non-covalent interactions (such as hydrogen bonds, [4][5][6] ionic interactions, [7][8][9][10] and metal-ligand coordination interactions [11][12][13] ) and non-conventional covalent bonds (such as dynamic covalent bonds [14][15][16] ) into the elastomer matrix as crosslinking bonds. Inspired by biological materials such as silk, muscle, etc., tailor-made elastomer materials have been developed by non-covalent crosslinking, and show tunable high mechanical properties and healing capability.…”