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How to Measure Work of Adhesion and Surface Tension of Soft Materials

Tian, Yuan, TIAN
http://rave.ohiolink.edu/etdc/view?acc_num=akron1523295919890025

Abstract Details

2018, Master of Science, University of Akron, Polymer Science.
Knowledge of the work of adhesion and surface tension plays an important role in the design of new materials for applications such as coatings, adhesives, and lubricants. We develop an approach for obtaining work of adhesion and substrate surface tension from analysis of the equilibrium indentation data of rigid particles in contact with elastic surfaces. By comparing predictions of different models of a rigid particle in contact with a soft elastic surface we show that a crossover expression taking into account contributions of the elastic energy of the contact and surface free energy change in the contact area and outside is the best in describing the results of the coarse-grained molecular dynamics simulations. This crossover expression is applied to obtain work of adhesion and surface tension of polystyrene (PS) and poly(methyl methacrylate) (PMMA) particles on poly(dimethylsiloxane) (PDMS) substrates. This is achieved by studying the depth of indentations produced by PS and carboxyl group modified PS particles with radii Rp between 0.2 and 45.0 µm and PMMA particles with sizes between 0.58 and 52.1 µm in substrates made of super-soft, solvent-free PDMS elastomers with brush-like and linear chain network strands having the modulus from 3 to 600 kPa. Analysis of the experimental data results in the work of adhesion W=48.0±2.9 mN/m for PS/PDMS, W=268.4±27.0 mN/m for PS-COOH/PDMS and for W=56.2±2.4mN/m PMMA/PDMS. The surface tension of the PDMS substrate is found to be γs = 23.6±2.1 mN/m.
Andrey Dobrynin (Advisor)
Ali Dhinojwala (Committee Member)
34 p.
Materials Science; Physics; Polymers
work of adhesion; surface tension; MD simulation; networks; soft materials

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Citations

  • Tian, TIAN, Y. (2018). How to Measure Work of Adhesion and Surface Tension of Soft Materials [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1523295919890025

    APA Style (7th edition)

  • Tian, TIAN, Yuan. How to Measure Work of Adhesion and Surface Tension of Soft Materials. 2018. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1523295919890025.

    MLA Style (8th edition)

  • Tian, TIAN, Yuan. "How to Measure Work of Adhesion and Surface Tension of Soft Materials." Master's thesis, University of Akron, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1523295919890025

    Chicago Manual of Style (17th edition)

akron1523295919890025
641
© 2018, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.