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Nanotribology of hydrogels with similar stiffness but different polymer and crosslinker concentrations

Li, H. (author)
University of Western Australia, Australia,Univ Western Australia, Sch Mol Sci, 35 Stirling Highway, Perth, WA 6009, Australia.;Univ Western Australia, Ctr Microscopy Characterisat & Anal, Perth, WA 6009, Australia.
Choi, Y. S. (author)
University of Western Australia, Australia,Univ Western Australia, Sch Human Sci, 35 Stirling Highway, Perth, WA 6009, Australia.
Rutland, Mark W. (author)
KTH,RISE,Material- och ytdesign,KTH Royal Institute of Technology, Sweden,Yt- och korrosionsvetenskap,Rise
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Atkin, R. (author)
University of Western Australia, Australia,Univ Western Australia, Sch Mol Sci, 35 Stirling Highway, Perth, WA 6009, Australia.
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University of Western Australia, Australia Univ Western Australia, Sch Mol Sci, 35 Stirling Highway, Perth, WA 6009, Australia;Univ Western Australia, Ctr Microscopy Characterisat & Anal, Perth, WA 6009, Australia. (creator_code:org_t)
Academic Press Inc. 2020
2020
English.
In: Journal of Colloid and Interface Science. - : Academic Press Inc.. - 0021-9797 .- 1095-7103. ; 563, s. 347-353
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Hypothesis: The stiffness has been found to regulate hydrogel performances and applications. However, the key interfacial properties of hydrogels, like friction and adhesion are not controlled by the stiffness, but are altered by the structure and composition of hydrogels, like polymer volume fraction and crosslinking degree. Experiments: Colloidal probe atomic force microscopy has been use to investigate the relationship between tribological properties (friction and adhesion) and composition of hydrogels with similar stiffness, but different polymer volume fractions and crosslinking degrees. Findings: The interfacial normal and lateral (friction) forces of hydrogels are not directly correlated to the stiffness, but altered by the hydrogel structure and composition. For normal force measurements, the adhesion increases with polymer volume fraction but decreases with crosslinking degree. For lateral force measurements, friction increases with polymer volume fraction, but decreases with crosslinking degree. In the low normal force regime, friction is mainly adhesion-controlled and increases significantly with the adhesion and polymer volume fraction. In the high normal force regime, friction is predominantly load-controlled and shows slow increase with normal force. 

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik -- Polymerteknologi (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Chemical Engineering -- Polymer Technologies (hsv//eng)

Keyword

Adhesion
Colloidal probe atomic force microscopy
Friction
Hydrogel
Atomic force microscopy
Force measurement
Hydrogels
Nanotribology
Polymers
Probes
Stiffness
Volume fraction
Colloidal probe atomic force microscopies
Cross-linking degree
Crosslinker concentration
Hydrogel structure
Interfacial property
Normal forces
Polymer volume fraction
Tribological properties
Crosslinking
n
n' methylenebisacrylamide
polyacrylamide gel
Article
chemical composition
chemical structure
colloid
concentration (parameter)
correlation coefficient
cross linking
force
nanotechnology
priority journal
rigidity
shear strength
volume

Publication and Content Type

ref (subject category)
art (subject category)

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By the author/editor
Li, H.
Choi, Y. S.
Rutland, Mark W.
Atkin, R.
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ENGINEERING AND TECHNOLOGY
ENGINEERING AND ...
and Chemical Enginee ...
and Polymer Technolo ...
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Journal of Collo ...
By the university
RISE
Royal Institute of Technology

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