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Bio‐Inspired Multiscale Design for Strong and Tough Biological Ionogels
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Journal Article
Bio‐Inspired Multiscale Design for Strong and Tough Biological Ionogels
2023
Overview
Structure design provides an effective solution to develop advanced soft materials with desirable mechanical properties. However, creating multiscale structures in ionogels to obtain strong mechanical properties is challenging. Here, an in situ integration strategy for producing a multiscale‐structured ionogel (M‐gel) via ionothermal‐stimulated silk fiber splitting and moderate molecularization in the cellulose‐ions matrix is reported. The produced M‐gel shows a multiscale structural superiority comprised of microfibers, nanofibrils, and supramolecular networks. When this strategy is used to construct a hexactinellid inspired M‐gel, the resultant biomimetic M‐gel shows excellent mechanical properties including elastic modulus of 31.5 MPa, fracture strength of 6.52 MPa, toughness reaching 1540 kJ m−3, and instantaneous impact resistance of 3.07 kJ m−1, which are comparable to those of most previously reported polymeric gels and even hardwood. This strategy is generalizable to other biopolymers, offering a promising in situ design method for biological ionogels that can be expanded to more demanding load‐bearing materials requiring greater impact resistance. A high‐performance biomimetic ionogel is developed by in situ multiscale design of silk fiber in a cellulose‐ions matrix. The biomimetic ionogel shows high ionic conductivity of 49.6 mS cm−1 and ultra‐strong mechanical properties with a fracture strength of 6.5 MPa and impact resistance as high as 3.07 kJ m−1, holding great application potential in flexible bioelectronics and smart protective devices.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
Subject
