•  
  •  
 
Nano Research

Article Title

Magnetic-programmable organohydrogels with reconfigurable network for mechanical homeostasis

Authors

Yingchao Yang, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
Qian Liu, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
Tianyi Zhao, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
Yunfei Ru, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
Ruochen Fang, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China;Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
Yichao Xu, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China;Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China
Jin Huang, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
Mingjie Liu, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China;Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China;Research Institute of Frontier Science, Beihang University, Beijing 100191, China;International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191, China

Keywords

magnetic-programmable mechanics, organohydrogels, reconfigurable network, ferrofluid, mechanical homeostasis

Abstract

Synthetic materials with tunable mechanical properties have great potential in soft robotics and biomedical engineering. However, current materials are limited to the mechanical duality altering their mechanical properties only between soft and hard states and lack of consecutively programmable mechanics. Herein, the magnetic-programmable organohydrogels with heterogeneous dynamic architecture are designed by encasing oleophilic ferrofluid droplets into hydrogel matrix. As magnetic field increases, the mechanical properties of organohydrogels can be consecutively modulated owing to the gradual formation of chain-like assembly structures of nanoparticles. The storage modulus G′ increases by 2.5 times when magnetic field goes up to 0.35 T. Small-Angle X-ray Scattering (SAXS) confirms the reconfigurable orientation of nanoparticles and the organohydrogels show reversible modulus switching. Besides, the materials also exhibit high stretchability, magnetic actuation behavior and effective self-healing capability. Furthermore, the organohydrogels are applied into the design of effectors with mechanical adaptivity. When subjected to serious external perturbations, the effector can maintain mechanical homeostasis by regulating modulus of organohydrogel under applied magnetic field. Such materials are applicable to homeostatic systems with mechanically adaptive behaviors and programmed responses to external force stimuli.

Publisher

Tsinghua University Press

Share

COinS