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Enhanced vapor sorption in block and random copolymer brushes
Ivona Glišić1, Guido C Ritsema van Eck1, Leon A Smook1
1Sustainable Polymer Chemistry Group, Department of Molecules & Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands. s.j.a.debeer@utwente.nl.
Soft Matter
|October 19, 2022
Summary
Random copolymer brushes significantly enhance vapor sorption, especially at low pressures, outperforming homopolymer and block copolymer designs. This advancement is crucial for sensing and separation technologies.
Area of Science:
- Polymer Science
- Materials Science
- Physical Chemistry
Background:
- Polymer brushes sorb vapors, showing potential for sensing and separation.
- Homopolymer brushes exhibit limited vapor sorption at low vapor pressures.
Purpose of the Study:
- To investigate how two-component polymer brush architecture influences vapor sorption.
- To compare vapor sorption in block and random copolymer brushes against homopolymer brushes.
Main Methods:
- Molecular dynamics simulations were used to study block and random copolymer brushes.
- Absorption isotherms were generated for various polymer brush architectures.
- The influence of monomer miscibility and interfaces on sorption was analyzed.
Main Results:
- Random copolymer brushes demonstrated superior vapor sorption compared to homopolymer, block, and mixed binary brushes.
- Enhanced sorption was observed across a range of relative vapor pressures.
- The most significant improvement in sorption occurred at low vapor pressures.
Conclusions:
- Random copolymer brushes offer enhanced vapor sorption capabilities, particularly beneficial for low-pressure applications.
- This architecture is promising for developing advanced vapor sensing and separation technologies.
