Mineral Tanning‐Inspired Metal Ions Coordination Hydrogels with Outstanding Mechanical Strength and Toughness for Flexible Force Sensors
Source abstract
Abstract
Abstract By virtue of reversible energy dissipation and good ionic conductivity, metal ions have been extensively introduced to construct hydrogels. However, the traditional soaking method to prepare metal ions coordination hydrogels (MI‐HG) faces the challenge of diffusion and combination of metal ions, leading to weak mechanical properties. Inspired by the leather mineral tanning mechanism, a strategy that controls the accessibility of hydrogels by pickling and basifying processes thus significantly improving the strength and toughness of MI‐HG is proposed. To achieve this, polyvinyl alcohol/poly(acrylamide‐co‐acrylic acid) (PVA/PAM‐co‐PAA) hydrogels‐bearing ligands similar to those of leather collagen are fabricated. Zr4+, Cr3+, Al3+, and Fe3+ commonly used for mineral tanning are chosen as the metal source. The results demonstrate that the mechanical properties of the products (MI‐HGTanning) are significantly promoted, especially for Cr3+ and Zr4+. For example, the tensile strength of Zr‐HGTanning and toughness of Cr‐HGTanning reach 7.79 ± 0.41 Mpa and 28.01 ± 3.1 MJ m−3, approximately three and seven times that of their soaking samples. From macro to micro characterization and by theoretical simulation, the mineral tanning mechanism of metal ions first permeating and then effectively combining with carboxylates, thus improving the mechanical performance of MI‐HGTanning is deciphered, the products of which are promised applications in flexible force sensors.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Collagen: Extraction and Characterization · Hydrogels: synthesis, properties, applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Bioresources Chemical and Materials Engineering Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry Ministry of Education Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology College of Mechanical and Electrical Engineering Shaanxi University of Science & Technology Xi'an Shaanxi 710021 China
Nano Medical Engineering Laboratory RIKEN Cluster for Pioneering Research 2‐1 Hirosawa Wako Saitama 351‐0198 Japan
Key Laboratory of Leather Chemistry and Engineering (Sichuan University) Ministry of Education Chengdu 610065 China
Biochemistry Division Chemistry Department Faculty of Science Tanta University Tanta 31527 Egypt
Department of Pharmaceutics and Pharmaceutical Technology Faculty of Pharmacy Menoufia University Gamal Abdel El‐Nasr Street Shebin El‐Kom Menoufia 32511 Egypt
State Key Laboratory of Fluid Power & Mechatronic System Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Center for X‐Mechanics Department of Engineering Mechanics Zhejiang University Hangzhou 310027 China
Funding
National Natural Science Foundation of China · China Scholarship Council
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