Nanostructure of Poly(Acrylic Acid) Adsorption Layer on the Surface of Activated Carbon Obtained from Residue After Supercritical Extraction of Hops

The nanostructure of poly(acrylic acid) (PAA) adsorption layer on the surface of mesoporous-activated carbon HPA obtained by physical activation of residue after supercritical extraction of hops was characterized. This characterization has been done based on the analysis of determination of adsorbed...

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Bibliographic Details
Published in:Nanoscale research letters 2017-12, Vol.12 (1), p.2-9, Article 2
Main Authors: Wiśniewska, M., Nosal-Wiercińska, A., Ostolska, I., Sternik, D., Nowicki, P., Pietrzak, R., Bazan-Wozniak, A., Goncharuk, O.
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Chemistry and Materials Science
Extraction
Hops
Materials Science
Molecular Medicine
Molecular weight
Nano Express
Nanochemistry
Nanoscale Science and Technology
Nanostructure
Nanotechnology
Nanotechnology and Microengineering
Nanotechnology and Nanomaterials 2016
Surface chemistry
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Summary:The nanostructure of poly(acrylic acid) (PAA) adsorption layer on the surface of mesoporous-activated carbon HPA obtained by physical activation of residue after supercritical extraction of hops was characterized. This characterization has been done based on the analysis of determination of adsorbed polymer amount, surface charge density, and zeta potential of solid particles (without and in the PAA presence). The SEM, thermogravimetric, FTIR, and MS techniques have allowed one to examine the solid surface morphology and specify different kinds of HPA surface groups. The effects of solution pH, as well as polymer molecular weight and concentration, were studied. The obtained results indicated that the highest adsorption on the activated carbon surface was exhibited by PAA with lower molecular weight (i.e., 2000 Da) at pH 3. Under such conditions, polymeric adsorption layer is composed of nanosized PAA coils (slightly negatively charged) which are densely packed on the positive surface of HPA. Additionally, the adsorption of polymeric macromolecules into solid pores is possible.
ISSN:1931-7573
1556-276X
DOI:10.1186/s11671-016-1772-3