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Printing Reinforcing Structures onto Microsieves That Are Floating on a Water Surface.

Werner A Goedel¹, Kerstin Gläser¹, Dana Mitra²

¹Physical Chemistry , Chemnitz University of Technology , Straße der Nationen 62 , 09111 Chemnitz , Germany.

Langmuir : the ACS Journal of Surfaces and Colloids

|December 29, 2018

Summary

Researchers developed a novel method for creating robust, hierarchically structured microsieves using float-casting and inkjet-printing. These advanced microsieves demonstrate superior water permeance and effective particle retention for filtration applications.

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Area of Science:

Materials Science
Nanotechnology
Chemical Engineering

Background:

Conventional filtration media often face limitations in permeance and structural integrity.
Developing advanced microsieves with controlled pore sizes and enhanced mechanical properties is crucial for efficient separation processes.

Purpose of the Study:

To prepare hierarchically structured microsieves with uniform through-pores.
To investigate the filtration performance of the fabricated microsieves.

Main Methods:

Float-casting of hydrophobized silica particles and a monomer mixture on water, followed by photopolymerization.
Inkjet-printing of a reinforcing structure onto the composite membrane.
Removal of silica particles to form the final microsieve structure.

Main Results:

Fabrication of reinforced microsieves (350 nm ± 50 nm thickness) with uniform through-pores (465 nm ± 50 nm diameter).
Demonstrated high water permeance, consistent with microsieve theories and exceeding conventional media.
Effective retention of particles larger than the pore size while allowing smaller particles to pass.

Conclusions:

The combination of float-casting and inkjet-printing enables the production of robust, hierarchically structured microsieves.
These microsieves offer significant advantages in filtration performance, including high permeance and selective particle retention.