Exceptionally tough and notch-insensitive magnetic hydrogels

Soft Matter
Hussain HaiderYong Mei Chen

Abstract

Most existing magnetic hydrogels are weak and brittle. The development of strong and tough magnetic hydrogels would extend their applications into uncultivated areas, such as in actuators for soft machines and guided catheters for magnetic navigation systems, which is still a big challenge. Here a facile and versatile approach to fabricating highly stretchable, exceptionally tough and notch-insensitive magnetic hydrogels, Fe(3)O(4)@Fe-alginate/polyacrylamide (PAAm), is developed, by dispersing alginate-coated Fe(3)O(4) nanoparticles into the interpenetrating polymer networks of alginate and PAAm, with hybrid physical and chemical crosslinks. A cantilever bending beam actuator as well as a proof-of-concept magnetically guided hydrogel catheter is demonstrated. The method proposed in this work can be integrated into other strong and tough magnetic hydrogels for the development of novel hydrogel nanocomposites with both desirable functionality and superior mechanical properties.

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Citations

Sep 17, 2016·The Journal of Chemical Physics·Giorgio PessotAndreas M Menzel
Apr 21, 2017·Advanced Materials·Navid KazemCarmel Majidi
Jul 5, 2019·Advanced Materials·Ritu Raman, Robert Langer
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May 24, 2019·ACS Applied Materials & Interfaces·Jingda TangTiejun Wang
Feb 19, 2019·ACS Applied Materials & Interfaces·Xiaocheng HuWei Yang

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