Investigation of adhesion hysteresis in poly(dimethylsiloxane) networks using the JKR technique

Perutz, S.; Krämer, Edward J.; Baney, J. M.; Hui, Chung‐Yuen; Cohen, Claude

doi:10.1002/(sici)1099-0488(19980915)36:12<2129::aid-polb11>3.0.co;2-1

Cited by 45 publications

(37 citation statements)

References 5 publications

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“…[10][11][12][13][14] PDMS, has been studied extensively in the literature. Three key factors have been identified to significantly affect the adhesion of soft elastomers: the mixing ratio of the base polymer to curing agent, 15,16 the solvent extraction of free (i.e., uncross-linked) chains, 9 and the ultraviolet ozone (UVO) treatment of the elastomer surface. 13 Despite numerous measurements, the adhesion mechanism remains vague or even contradictory.…”

Section: Introductionmentioning

confidence: 99%

Work of adhesion/separation between soft elastomers of different mixing ratios

Sanchez

2015

J. Mater. Res.

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Adhesion between soft matter is a universal mechanical problem in bio-engineering and bio-integration. The Johnson-Kendall-Roberts (JKR) method is widely used to measure the work of adhesion and work of separation between soft materials. In this study, the JKR theory is recaptured and three complementary dimensionless parameters are summarized to help design adhesion measurement experiments compatible with the JKR theory. The work of adhesion/separation between two commonly used soft elastomers, polydimethylsiloxane (PDMS, Sylgard Ò 184) and Ecoflex Ò 0300, is measured by the JKR method using a dynamical mechanical analyzer. Effects of base polymer to curing agent mixing ratio and solvent extraction are examined. A unified adhesion mechanism is proposed to explain the different adhesion behaviors. It is concluded that chain-matrix interaction is the most effective adhesion mechanism compared with chain-chain or matrix-matrix interactions. Chain-chain interaction obstructs chain-matrix interaction as it either blocks or entangles with surface chains which could have interacted with the matrix.

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Section: Introductionmentioning

confidence: 99%

Work of adhesion/separation between soft elastomers of different mixing ratios

Sanchez

2015

J. Mater. Res.

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“…This history dependence makes rigorous analytical modelling of viscoelastic fracture or contact quite cumbersome, as seen in the work of Schapery (1975aSchapery ( ,b, 1989, Barber et al (1989), Hui et al (1998), , Lin et al (1999), Lin & Hui (2002), Barthel & Haiat (2002), Haiat et al (2003) and Greenwood (2004). Further complicating the issue, interfacial processes can also cause significant dissipation, even for elastic materials (Silberzan et al 1994;Perutz et al 1998). Kendall (1973) first proposed that interface kinetics can contribute significantly to adhesion hysteresis, and this hypothesis has been verified by several experimental studies (e.g.…”

Section: Introductionmentioning

confidence: 99%

Mode-mixity-dependent adhesive contact of a sphere on a plane surface

2009

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Tangential loading in the presence of adhesion is highly relevant to biological locomotion, but mixed-mode contact of biological materials or similar soft elastomers remains to be well understood. To better capture the effects of dissipation in such contact problems owing to viscoelasticity or irreversible interfacial adhesive processes, a model is developed for the combined adhesive and tangential loading of a rigid sphere on a flat halfspace which incorporates a phenomenological model of energy dissipation in the form of increased effective work of adhesion with increasing degree of mode mixity. To verify the model, contact experiments are performed on polydimethylsiloxane (PDMS) samples using a custom-built microtribometer. Measurements of contact area during mixed normal/tangential loading indicate that the strong dependence of the effective work of adhesion upon mode mixity can be captured effectively by the phenomenological model in the regime where the contact area stayed circular and the slip was negligible. Rate effects were seen to be described by a power-law dependence upon the crack front velocity, similar to observations of rate-dependent contact seen for pure normal loading.

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“…This could be an indication that interdiffusion across the joint is important. This type of polymer/segmental migration has been found to be relevant for the development of adhesion and more importantly, adhesion hysteresis [6,9,10]. For other systems, adhesion between surfaces has been found to be both time and temperature dependent [6].…”

Section: Discussionmentioning

confidence: 99%

“…Adhesion also depends on the rate of surface separation. If welded surfaces are very slowly separated, entanglements across the interface will spontaneously disengage, whereas higher separation rates will result in visco-elastic losses and chain rupture that will contribute to the measured adhesion energies [7][8][9]. Finally, the relative humidity and the presence of plasticizing agents during joint formation and joint separation highly influence the joint strength [6,10].…”

Section: Introductionmentioning

confidence: 98%

The role of polymer compatibility in the adhesion between surfaces saturated with modified dextrans

Eriksson¹,

Notley

Pelton

et al. 2007

Journal of Colloid and Interface Science

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Wet and dry adhesion between dextran-coated surfaces were measured aiming to understand the influence of polymer compatibility. The wet adhesion measurements were performed using the atomic force microscope (AFM) colloidal probe technique whereas the dry adhesion measurements were performed using the micro adhesion measurement apparatus (MAMA). Two types of dextrans were used, one cationically modified dextran (DEX) and one that was both cationically and hydrophobically modified (HDEX), leading to three different combinations of polymer-coated surfaces; (1) DEX:DEX, (2) HDEX:DEX, and (3) HDEX:HDEX. DEX increased dry adhesion more than HDEX did, which likely is due to differences in the ability to form specific interactions, especially hydrogen bonding. HDEX gave strong wet adhesion, probably due to its poorer solvency, while DEX contributed to reducing the wet adhesion due to its hydrophilicity. All combinations showed a steric repulsion on approach in aqueous media. Furthermore, when HDEX was adsorbed on either or both surfaces a long range attractive force between the surfaces was detected outside this steric regime.

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Investigation of adhesion hysteresis in poly(dimethylsiloxane) networks using the JKR technique

Cited by 45 publications

References 5 publications

Work of adhesion/separation between soft elastomers of different mixing ratios

Work of adhesion/separation between soft elastomers of different mixing ratios

Mode-mixity-dependent adhesive contact of a sphere on a plane surface

The role of polymer compatibility in the adhesion between surfaces saturated with modified dextrans

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