Related Experiment Video
Updated: Sep 18, 2025

Analyzing Protein Dynamics Using Hydrogen Exchange Mass Spectrometry
Published on: November 29, 2013
Ultra-Low Hysteresis Under Large Deformation Enabled by Fast Chains Relaxation in Highly Competitive Dynamic Hydrogen
Shuaijun Guo1, Shilei Zhu1, Yang Qiao1
1College of Materials Science & Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.
None:
High-quality capture of diverse motion signals in flexible sensors requires soft sensing materials to perform signal conversion and transmission stably and without delay over extended periods. However, low hysteresis achieved through purely elastic mechanisms easily exhibits poor crack propagation resistance. By leveraging the significant gap between the strain rate during large-strain service conditions and the crack propagation rate in the fracture process, this study presents a facile strategy for constructing a highly competitive dynamic hydrogen bonding system to produce near-zero-hysteresis and highly crack-resistant D-gels. Through tuning the relaxation dynamics of strong hydrogen bonding interactions with polymer segments by insert deep eutectic solvent (DES) components, the highly dynamic hydrogen bonds are rendered mechanically "invisible" during service condition-an essential factor in achieving a low-hysteresis attribute (low hysteresis: <3%). Meanwhile, the relaxation time of those dynamic bonds is comparable to the inverse of crack propagation rate, effectively alleviating stress concentration at the crack tips, thereby enhancing the ultimate fracture strain (1500%) and crack propagation strain (550%) of the gels. This approach provides a general strategy for synthesizing gels that overcome the traditional trade-off between high crack propagation resistance and high elasticity.
Related Concept Videos
Hydrogen Bonds
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
Stability of Conjugated Dienes
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
Conformations of Cyclohexane
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
Radical Chain-Growth Polymerization: Chain Branching
¹H NMR: Long-Range Coupling
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...

