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Bioinspired Programmable Polymer Gel Controlled by Swellable Guest Medium.

Heng Deng1, Yuan Dong1, Jheng-Wun Su1

  • 1Department of Mechanical & Aerospace Engineering, University of Missouri-Columbia , Columbia, Missouri 65211, United States.

ACS Applied Materials & Interfaces
|August 23, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel method for creating 3D origami and kirigami structures using responsive polymer gels. This bioinspired approach enhances material inhomogeneity for advanced applications in robotics and electronics.

Keywords:
bioinspiredlaser direct writingorigamiprogrammable polymerresponsive

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Responsive materials are crucial for 3D origami/kirigami structures in bioelectronics, metamaterials, microrobotics, and MEMS.
  • Existing methods often localize less-swellable components in swellable hosts to control swelling.
  • A need exists for novel strategies to create programmable responsive materials.

Purpose of the Study:

  • To introduce an opposite strategy for enhancing swelling inhomogeneity in responsive materials.
  • To develop a bioinspired method for fabricating 3D origami and kirigami structures.
  • To explore the use of laser direct writing for patterning programmable polymer gel films.

Main Methods:

  • Implanting a swellable guest medium (cyclopentanone) inside a nonswellable host polymer (SU-8).
  • Utilizing skinning effect induced surface polymerization and direct laser writing to create dual-gradient films.
  • Employing molecular dynamics (MD) simulations to understand solvent diffusion mechanisms.

Main Results:

  • Successfully fabricated dual-gradient gel films with controlled vertical and lateral swelling inhomogeneity.
  • Demonstrated reversible 3D shape transformation of origami/kirigami structures upon solvent stimulation.
  • MD simulations confirmed cyclopentanone enhances solvent diffusion, driving the programmable response.

Conclusions:

  • The bioinspired strategy offers a new route to engineer responsive polymer gels with programmable 3D shape transformations.
  • This method enables the fabrication of advanced responsive devices like soft grippers and locomotive robots.
  • The technique opens new avenues for developing novel responsive polymers and materials.