Noncovalent Surface Modification of Cellulose Nanopapers by Adsorption of Polymers from Aprotic Solvents

Langmuir : the ACS Journal of Surfaces and Colloids
Katri S KontturiEero Kontturi

Abstract

Basic adsorption of hydrophobic polymers from aprotic solvents was introduced as a platform technology to modify exclusively the surfaces of cellulose nanopapers. Dynamic vapor sorption demonstrated that the water vapor uptake ability of the nanopapers remained unperturbed, despite strong repellency to liquid water caused by the adsorbed hydrophobic polymer on the surface. This was enabled by the fact that the aprotic solvents used for adsorption did not swell the nanopaper unlike water that is generally applied as the adsorption medium in such systems. As case examples, the adsorptions of polystyrene (PS) and poly(trifluoroethylene) (PF3E) were followed by X-ray photoelectron spectroscopy and water contact angle measurements, backed up with morphological analysis by atomic force microscopy. The resulting nanopapers are useful in applications like moisture buffers where repellence to liquid water and ability for moisture sorption are desired qualities.

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Citations

Mar 6, 2018·Advanced Materials·Eero KontturiOlli Ikkala
May 24, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Bastien MichelKristin Syverud
Aug 2, 2021·Journal of Colloid and Interface Science·Wenyang XuEero Kontturi
Feb 8, 2018·Biomacromolecules·Tiina NypelöThomas Rosenau
Oct 26, 2018·Biomacromolecules·Fei LiuRichard A Gross

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