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Volumn 24, Issue 16, 2008, Pages 8678-8687

Normal and frictional forces between surfaces bearing polyelectrolyte brushes

Author keywords

[No Author keywords available]

Indexed keywords

ABS RESINS; ACRYLIC MONOMERS; BEARINGS (STRUCTURAL); BRUSHES; COPOLYMERIZATION; ESTERS; HYDROPHOBICITY; MICA; PLASTIC PRODUCTS; POLYELECTROLYTES; SEPARATION; SILICATE MINERALS; SODIUM;

EID: 50849115147     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la7039724     Document Type: Article
Times cited : (94)

References (100)
  • 39
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    • Raviv, U.; Kampf, N.; Klein, J. In Dynamics and Friction at Submicrometer Confining Systems; Braiman, Y.; Drake, M.; Family, F.; Klafter, J., Eds.; ACS Symposium Series; American Chemical Society: Washington, DC, 2004; pp 131-138.
    • Raviv, U.; Kampf, N.; Klein, J. In Dynamics and Friction at Submicrometer Confining Systems; Braiman, Y.; Drake, M.; Family, F.; Klafter, J., Eds.; ACS Symposium Series; American Chemical Society: Washington, DC, 2004; pp 131-138.
  • 63
    • 0043255190 scopus 로고
    • Biolubrication review paper
    • Institute of Petroleum: London
    • Dowson, D.; Wright, V., Biolubrication review paper. In Bio-tribology; Institute of Petroleum: London, 1973; pp 81-88.
    • (1973) Bio-tribology , pp. 81-88
    • Dowson, D.1    Wright, V.2
  • 94
    • 50849099316 scopus 로고    scopus 로고
    • The polyelectrolyte concentration is (3.5 ± 0.3) × 10 -6, and each chain has 80 ions; thus, the total ion concentration is on the order of 10-4. The polyelectrolyte localizes the ions in its vicinity and at this concentration the chains are about 100 nm apart, whereas their size is only a few nanometers and their neutralization length is less then 1 nm see the Discussion, Thus, counterions associated with different chains do not overlap. In addition, the chains essentially do not adsorb onto the mica surfaces and are not expected to remain in the gap. We therefore conclude that the contribution of the nonadsorbing polyelectrolytes to the screening length in this case is very small. Recently, a quantitative treatment of this case was reported by Tadmor et al, Macromolecules 2002, 35, 2380, Within the scatter, our data is in agreement with this treatment
    • -4. The polyelectrolyte localizes the ions in its vicinity and at this concentration the chains are about 100 nm apart, whereas their size is only a few nanometers and their neutralization length is less then 1 nm (see the Discussion). Thus, counterions associated with different chains do not overlap. In addition, the chains essentially do not adsorb onto the mica surfaces and are not expected to remain in the gap. We therefore conclude that the contribution of the nonadsorbing polyelectrolytes to the screening length in this case is very small. Recently, a quantitative treatment of this case was reported by Tadmor et al. (Macromolecules 2002, 35, 2380). Within the scatter, our data is in agreement with this treatment.
  • 95
    • 50849121221 scopus 로고    scopus 로고
    • We note that by assuming this additivity we may double count at D < 2L the contribution of the small fraction of counterions that are outside the brush. However, this should have a negligible effect
    • We note that by assuming this additivity we may double count at D < 2L the contribution of the small fraction of counterions that are outside the brush. However, this should have a negligible effect.
  • 96
    • 50849128011 scopus 로고    scopus 로고
    • 2, and this could correspondingly lead to larger and more reasonable (order unity) A and B values.
    • 2, and this could correspondingly lead to larger and more reasonable (order unity) A and B values.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.