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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.
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.
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