Effect of Polymer Architecture on the Adsorption Properties of a Nonionic Polymer

• The adsorption of a linear- and bottle-brush poly(ethylene oxide (PEO))-based polymer, having comparable molecular weights, was studied by means of quartz crystal microbalance with dissipation monitoring ability (QCM-D) and AFM colloidal probe force measurements. The energy dissipation change monitored by QCM-D and the range of the steric forces obtained from force measurements demonstrated that linear PEO forms a more extended adsorption layer than the bottle-brush polymer, despite that the adsorbed mass is higher for the latter. Competitive adsorption studies revealed that linear PEO is readily displaced from the interface by the bottle-brush polymer. This was attributed to the higher surface affinity of the latter, which is governed by the number of contact points between the polymers and the interface, and the smaller loss of conformational entropy.

Ämnesord

NATURVETENSKAP  -- Kemi -- Fysikalisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Physical Chemistry (hsv//eng)

Nyckelord

Adsorption

Bioelectric phenomena

Brushes

Eigenvalues and eigenfunctions

Energy dissipation

Ethylene

Force measurement

Oxide minerals

Photoresists

Quartz

Quartz crystal microbalances

Adsorption layers

Adsorption properties

American Chemical Society (ACS)

Competitive adsorption

Conformational entropy

Contact points

Non-ionic

Poly(ethylene oxide-terephthalate) (PEO)

Polymer architecture

Quartz crystal microbalance with dissipation monitoring (QCM-D)

Surface affinity

Surface and colloid chemistry

Yt- och kolloidkemi

Publikations- och innehållstyp

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art (ämneskategori)