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Related Experiment Video

Updated: Jun 6, 2026

Synthesis of Poly(N-isopropylacrylamide) Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability
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Published on: February 27, 2016

Superamphiphilic Janus fabric.

Ho Sun Lim1, Song Hee Park, Song Hee Koo

  • 1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|November 16, 2010
PubMed
Summary
This summary is machine-generated.

Researchers developed Janus fabrics with superhydrophobic and superhydrophilic sides using electrospinning and thermal treatment of polyacrylonitrile (PAN). This creates robust, smart fabrics with dual water-repelling and absorbing properties.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Surface Science

Background:

  • Developing advanced fabrics with tailored surface properties is crucial for various applications.
  • Janus materials, possessing distinct properties on opposite sides, offer unique functionalities.
  • Polyacrylonitrile (PAN) is a versatile polymer for fabricating fibrous materials.

Purpose of the Study:

  • To fabricate Janus fabrics with simultaneous superhydrophobic and superhydrophilic properties.
  • To explore a facile and scalable method for creating functional smart fabrics.
  • To enhance the properties of polyacrylonitrile nanofibrous materials.

Main Methods:

  • Electrospinning of polyacrylonitrile (PAN) onto an aluminum foil substrate.
  • Thermal treatment to induce hydrolysis and create a superhydrophilic surface.
  • Sequential electrospinning and peeling to form free-standing Janus fabrics.
  • Incorporation of tetraethyl orthosilicate to improve solvent resistance.

Main Results:

  • Successfully fabricated Janus fabrics exhibiting distinct superhydrophobic (151.2° water contact angle) and superhydrophilic (0° water contact angle) surfaces.
  • Demonstrated dual functionality: water repellency on one side and water absorption on the other.
  • Significantly improved organic solvent resistance of PAN nanofibrous sheets through tetraethyl orthosilicate incorporation.

Conclusions:

  • A simple and effective method for creating Janus fabrics with superamphiphilicity was established.
  • The developed Janus fabrics offer a new platform for smart, robust textile applications.
  • This technique provides a cost-effective route using readily available polyacrylonitrile.