Modulation of friction dynamics in water by changing the combination of the loop- and graft-type poly(ethylene glycol) surfaces

Ji-Hun Seo, Yusuke Tsutsumi, Akinori Kobari, Masayuki Shimojo, Takao Hanawa, Nobuhiko Yui

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A Velcro-like poly(ethylene glycol) (PEG) interface was prepared in order to control the friction dynamics of material surfaces. Graft- and loop-type PEGs were formed on mirror-polished Ti surfaces using an electrodeposition method with mono- and di-amine functionalized PEGs. The friction dynamics of various combinations of PEG surfaces (i.e., graft-on-graft, loop-on-loop, graft-on-loop, and loop-on-graft) were investigated by friction testing. Here, only the Velcro-like combinations (graft-on-loop and loop-on-graft) exhibited a reversible friction behavior (i.e., resetting the kinetic friction coefficient and the reappearance of the maximum static friction coefficient) during the friction tests. The same tendency was observed when the molecular weights of loop- and graft-type PEGs were tested at 1 k and 10 k, respectively. This indicates that a Velcro-like friction behavior could be induced by simply changing the conformation of PEGs, which suggests a novel concept of altering polymer surfaces for the effective control of friction dynamics.

Original languageEnglish
Pages (from-to)936-942
Number of pages7
JournalSoft Matter
Volume11
Issue number5
DOIs
Publication statusPublished - 2015 Feb 7
Externally publishedYes

Fingerprint

Grafts
Polyethylene glycols
glycols
ethylene
friction
Modulation
Friction
modulation
Water
water
coefficient of friction
amines
Amines
kinetic friction
static friction
electrodeposition
Electrodeposition
molecular weight
tendencies
Conformations

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Modulation of friction dynamics in water by changing the combination of the loop- and graft-type poly(ethylene glycol) surfaces. / Seo, Ji-Hun; Tsutsumi, Yusuke; Kobari, Akinori; Shimojo, Masayuki; Hanawa, Takao; Yui, Nobuhiko.

In: Soft Matter, Vol. 11, No. 5, 07.02.2015, p. 936-942.

Research output: Contribution to journalArticle

Seo, Ji-Hun ; Tsutsumi, Yusuke ; Kobari, Akinori ; Shimojo, Masayuki ; Hanawa, Takao ; Yui, Nobuhiko. / Modulation of friction dynamics in water by changing the combination of the loop- and graft-type poly(ethylene glycol) surfaces. In: Soft Matter. 2015 ; Vol. 11, No. 5. pp. 936-942.
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