Bioinspired Design of High Vibration-Damping Supramolecular Elastomers Based on Multiple Energy-Dissipation Mechanisms

Abstract

Suppressing vibrations and noises is essential for our automated society. Here, inspired by the hierarchical dynamic bonds and phase separation of mussel byssal threads, we synthesize high-damping supramolecular elastomers (HDEs) via simple onepot radical polymerization of butyl acrylate (BA), acrylic acid (AA), and vinylimidazole (VI). Interestingly, AA and VI not only form hydrogen bonds and ionic bonds simultaneously but also segregate into aggregates of different sizes, thereby successfully mimicking the hierarchical structure of mussel byssal threads. When applying external forces, the weak hydrogen bonds are broken at first and then the ionic bonds and aggregates are disrupted progressively from small to large deformations. Such multiple energy-dissipation mechanisms lead to the outstanding damping property of the HDEs. Therefore, the HDEs outperform commercially available rubbers in terms of sound absorption and vibration damping. Furthermore, the multiple energy-dissipation mechanisms impart the HDEs with high toughness (41.1 MJ/m 3 ), tensile strength (21.3 MPa), and self-healing ability.

High-Performance Self-Healing Polymers

“…Because of the multistage energy dissipation, the material shows superiority with respect to sound absorption and vibration damping (Figure 3f) and has good mechanical properties (high fracture strength of 21.3 MPa and fracture strain of 556%) (Figure 3g). 40 Besides, a selfhealing ionomer based on pyridine derivative grafted bromobutyl rubber (BIIR) was fabricated. Interestingly, the mechanical property and self-healing efficiency can be tailored by changing the electron-donating effect of the substituent groups of the pyridine derivatives (Figure 4a).…”

“…Under heat or external force, the hydrogen bonds break, along with the dissociation of ionic bonds and aggregates. Because of the multistage energy dissipation, the material shows superiority with respect to sound absorption and vibration damping (Figure f) and has good mechanical properties (high fracture strength of 21.3 MPa and fracture strain of 556%) (Figure g) . Besides, a self-healing ionomer based on pyridine derivative grafted bromobutyl rubber (BIIR) was fabricated.…”

Highly Conductive Polysiloxane Elastomers with Excellent Transparency, Resilience, and Stretchability

“…To further improve the mechanical properties of mPDMS/PEG elastomers, strengthening the network structure while maintaining the good electrical conductivity of the elastomer is crucial. It is noticeable that in our hydrogel research, the multibond network (MBN) strategy is proposed for the preparation of high-strength and stretchable hydrogels. – Typically, MBN hydrogels possess a single network composed of hierarchical cross-linking bonds with various binding energies, such as metal–ligand coordination interactions, hydrogen bonding, hydrophobic associations, etc., and these dynamic bonds have been utilized as energy dissipation units and dynamic cross-linking points for network homogeneity through their recombining to reinforce MBN hydrogels. – …”

Recent progress in low‐swellable polymer‐based smart photonic crystal sensors

“…For the characteristic wavenumbers v 1 and v 2 (crosspeaks, assuming v 1 > v 2 ), if the correlation intensity Φ (v 1 , v 2 ) in synchronous spectra shows the same symbol (both negative or both positive) as the correlation peak Ψ (v 1 , v 2 ) in asynchronous spectra, the change of band v 1 is prior to or earlier than that of band v 2 , and vice versa. [189] Besides, if the correlation intensity in synchronous spectra is not zero (or blank), but zero in asynchronous one, then the movements of bands at v 1 and v 2 are simultaneous. Noda's rules are summarized as follows:…”