Investigation of the Structure of Polyethylene Glycol (PEG) Layers Adsorbed at the Alumina-Polymer Solution Interface
The investigations presented were aimed at a description of the structure of the adsorbed layers of polyethylene glycol (PEG) on the surface of Al 2 O 3 . This was obtained from measurements of the adsorption heat of PEG macromolecules as well as of 1,2-dimethoxyethane (C 4 H 10 O 2 ) and tetraethyl...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2004-06-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263617042863057 |
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| Summary: | The investigations presented were aimed at a description of the structure of the adsorbed layers of polyethylene glycol (PEG) on the surface of Al 2 O 3 . This was obtained from measurements of the adsorption heat of PEG macromolecules as well as of 1,2-dimethoxyethane (C 4 H 10 O 2 ) and tetraethylene glycol dimethyl ether (C 10 H 22 O 5 ), i.e. low-molecular weight compounds constituting the monomers forming the PEG chain. The results allowed the fraction of polymer segments bonding directly to the Al 2 O 3 surface to be estimated. Other information obtained from calculations based on the Scheutjens–Fleer theory included the distribution of chain segment conformations as trains, loops and tails, together with a determination of some structural changes and the sizes of PEG macromolecules as they moved from the bulk solution to the solid phase surface. The thickness of the adsorbed macro-molecular polymer layers on the alumina surface was also determined. All these data enabled an approximate description to be made of the polymer chain structure at the Al 2 O 3 –polymer solution interface. |
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| ISSN: | 0263-6174 2048-4038 |