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Updated: Sep 25, 2025

Preparation of Light-responsive Membranes by a Combined Surface Grafting and Postmodification Process

Preparation of Light-responsive Membranes by a Combined Surface Grafting and Postmodification Process

Published on: March 21, 2014

Bioinspired Photo-Responsive Liquid Gating Membrane.

Rongrong Zhang¹, Jinmei Lei¹, Jiadai Xu¹

¹State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.

Biomimetics (Basel, Switzerland)

|April 25, 2022

Summary

This summary is machine-generated.

Inspired by plant stomata, this study created a light-responsive membrane. It reversibly controls liquid flow using photo-responsive surfactants, enabling contactless microfluidic control.

Keywords:

gas transport liquid gating membrane photo-responsive stomata-inspired

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Last Updated: Sep 25, 2025

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Area of Science:

Materials Science
Bioinspired Engineering
Surface Chemistry

Background:

Plant stomata regulate gas exchange, opening under visible light and closing under UV light to prevent water loss.
This natural self-protection mechanism inspired the development of artificial systems.

Purpose of the Study:

To engineer a bioinspired photo-responsive liquid gating membrane (BPRLGM).
To achieve reversible switching of membrane states (open/closed) using light stimuli.
To explore applications in microfluidics control.

Main Methods:

Dissolving azobenzene-based photo-responsive surfactant molecules (AzoC8F15) in N,N-Dimethylacetamide (DMAC) to create a gating liquid.
Infusing this liquid into a porous nylon substrate to form the BPRLGM.
Utilizing UV and visible light to induce reversible photoisomerization of surfactant molecules.

Main Results:

Demonstrated reversible switching of the BPRLGM's open/closed states under alternating UV and visible light.
Showcased that photoisomerization alters the gating liquid's surface tension, modulating critical pressure for gas flow.
Confirmed pressure difference (ΔP) drives the reversible switching.

Conclusions:

The BPRLGM effectively mimics stomatal self-protection behavior.
This technology offers precise, contactless control for microfluidic applications.
The developed membrane holds potential for advanced fluidic device engineering.