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Related Experiment Video

Updated: Feb 26, 2026

An Additive Manufacturing Technique for the Facile and Rapid Fabrication of Hydrogel-based Micromachines with Magnetically Responsive Components
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Impermeable Robust Hydrogels via Hybrid Lamination.

German A Parada1,2, Hyunwoo Yuk1, Xinyue Liu1

  • 1Soft Active Materials Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.

Advanced Healthcare Materials
|July 18, 2017
PubMed
Summary

Researchers developed robust, stretchable hydrogel laminates using an elastomer layer. These impermeable materials enable controlled drug release and pH sensing, overcoming limitations of traditional hydrogels for medical applications.

Keywords:
hydrogel devicesimpermeablelaminate structureslubricious surfacestough hydrogels

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Traditional hydrogels lack mechanical robustness and are permeable to small molecules, hindering applications in sensing, drug delivery, and soft robotics.
  • Existing hydrogel materials often fail to meet the demanding requirements for advanced biomedical and engineering applications.

Purpose of the Study:

  • To develop a general strategy for fabricating robust, highly stretchable, and impermeable hydrogel laminates.
  • To demonstrate the tunability of stiffness and impermeability in these novel hydrogel structures.
  • To explore the potential of these hydrogel laminates in controlled drug release and differential sensing applications.

Main Methods:

  • Fabrication of hydrogel laminates through hybrid lamination, incorporating an elastomer layer between hydrogel layers.
  • Tuning of material properties by controlling the composition and thickness of individual layers.
  • Assessment of mechanical properties (robustness, stretchability, stiffness) and molecular permeability.
  • Demonstration of drug release and pH sensing capabilities across the laminate structure.

Main Results:

  • Successfully fabricated robust, highly stretchable, and impermeable hydrogel laminates.
  • Achieved tunable stiffness without compromising stretchability by adjusting layer composition and thickness.
  • Demonstrated ultralow surface coefficients of friction.
  • Prevented diffusion of molecules across the laminate, enabling selective drug release and differential pH sensing.
  • Showcased potential healthcare applications by coating medical devices for drug release and environmental sensing.

Conclusions:

  • The developed hybrid lamination strategy offers a versatile method to create advanced hydrogel materials with enhanced mechanical properties and controlled permeability.
  • These impermeable hydrogel laminates overcome key limitations of conventional hydrogels, opening new avenues for sophisticated sensing and drug delivery systems.
  • The demonstrated applications in medical device coatings highlight the significant potential of this technology in healthcare, particularly for gastrointestinal and urinary tract applications.