Strain-stiffening gels based on latent crosslinking
Strain-stiffening gels based on latent crosslinking
Gels are an increasingly important class of soft materials with applications ranging from regenerative medicine to commodity materials. A major drawback of gels is their relative mechanical weakness, which worsens further under strain. We report a new class of responsive gels with latent crosslinking moieties that exhibit strain-stiffening behavior. This property results from the lability of disulfides, initially isolated in a protected state, then activated to crosslink on-demand. The active thiol groups are induced to form inter-chain crosslinks when subjected to mechanical compression, resulting in a gel that strengthens under strain. Molecular shielding design elements regulate the strain-sensitivity and spontaneous crosslinking tendencies of the polymer network. These strain-responsive gels represent a rational design of new advanced materials with on-demand stiffening properties with potential applications in elastomers, adhesives, foams, films, and fibers.
John Klier、Todd S. Emrick、Shelly R. Peyton、Yen H. Tran、Matthew J. Rasmuson
材料科学高分子化合物工业胶粘剂工业
John Klier,Todd S. Emrick,Shelly R. Peyton,Yen H. Tran,Matthew J. Rasmuson.Strain-stiffening gels based on latent crosslinking[EB/OL].(2017-07-27)[2025-07-01].https://arxiv.org/abs/1707.09077.点此复制
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