Effect of solvent quality and chain density on normal and frictional forces between electrostatically anchored thermoresponsive diblock copolymer layers

Show full item record



Permalink

http://hdl.handle.net/10138/224262

Citation

An , J , Liu , X , Dedinaite , A , Korchagina , E , Winnik , F M & Claesson , P M 2017 , ' Effect of solvent quality and chain density on normal and frictional forces between electrostatically anchored thermoresponsive diblock copolymer layers ' , Journal of Colloid and Interface Science , vol. 487 , pp. 88-96 . https://doi.org/10.1016/j.jcis.2016.10.021

Title: Effect of solvent quality and chain density on normal and frictional forces between electrostatically anchored thermoresponsive diblock copolymer layers
Author: An, Junxue; Liu, Xiaoyan; Dedinaite, Andra; Korchagina, Evgeniya; Winnik, Francoise M.; Claesson, Per M.
Contributor: University of Helsinki, Department of Chemistry
Date: 2017-02-01
Language: eng
Number of pages: 9
Belongs to series: Journal of Colloid and Interface Science
ISSN: 0021-9797
URI: http://hdl.handle.net/10138/224262
Abstract: Equilibration in adsorbing polymer systems can be very slow, leading to different physical properties at a given condition depending on the pathway that was used to reach this state. Here we explore this phenomenon using a diblock copolymer consisting of a cationic anchor block and a thermoresponsive block of poly(2-isopropyl-2-oxazoline), PIPOZ. We find that at a given temperature different polymer chain densities at the silica surface are achieved depending on the previous temperature history. We explore how this affects surface and friction forces between such layers using the atomic force microscope colloidal probe technique. The surface forces are purely repulsive at temperatures
Subject: Surface forces
Friction
Boundary lubrication
PIPOZ
Poly(2-isopropyl-2-oxazoline)
Thermoresponsive polymer
Adsorption hysteresis
DIFFERENTIAL SCANNING CALORIMETRY
TEMPERATURE-DEPENDENT ADSORPTION
CYLINDRICAL MOLECULAR BRUSHES
INDUCED PHASE-SEPARATION
SODIUM DODECYL-SULFATE
AQUEOUS-SOLUTIONS
SURFACE FORCES
CATIONIC POLYELECTROLYTES
N-ISOPROPYLACRYLAMIDE
SALT CONCENTRATION
116 Chemical sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
1_s2.0_S0021979716307731_main.pdf 856.8Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record