Skip to main content Skip to navigation
The Gene and Linda Voiland School of Chemical Engineering and Bioengineering

Faculty & Staff

Richard Zollars

Richard Zollars

Richard Zollars, Ph.D.
Emeritus Professor

The Gene and Linda Voiland
School of Chemical Engineering and Bioengineering
1505 Stadium Way, Room 105
P.O. Box 646515
Washington State University
Pullman, WA 99164-6515


  • Ph.D., Chemical Engineering, University of Colorado, 1974
  • M.S., Chemical Engineering, University of Colorado, 1972
  • B.S., Chemical Engineering, University of Minnesota, 1968

Professional Experience

  • Washington State University 1978-2015
  • National Science Foundation, program director, 1983–1984
  • University of Colorado, assistant professor, 1977–1978
  • Union Carbide Corporation, senior engineer, 1974–1977
  • Minnesota Mining and Manufacturing, laboratory technician, 1966–1968

Research Interests

  • Chemical Engineering: Multiphase chemical reactor design with simultaneous heat and mass transfer, fine particulate processing, cryogenic processing conditions, chemical vapor deposition
  • Colloidal/Interfacial Phenomena: Adsorption of surface active Materials, stability of colloids to Brownian and shear-induced coagulation, microcellular and micellar generation of particles
  • Engineering Education: Visual tools to improve student
    learning, integration of engineering with the K–12 system
  • Polymer Science and Engineering: Relationships of polymer structure and composition to reactor type and conditions, especially for heterophase polymerization

Professional Recognition

  • Named Fellow, American Society for Engineering Education, 2012
  • Named Fellow, American Institute of Chemical Engineers, 2008
  • Outstanding Teaching Faculty, WSU (Chemical Engineering), 1981, 1982, 1986, 1992, 2001, 2012


Selected Publications

  1. Does Colloid Shape Affect Detachment of Colloids by a Moving Air-Water Interface?”, with S. Aramrak, M. Flury, J. B. Harsh, and H. P. Davis, Langmuir29, 5770 (2013).
  2. The Design and Experimental Evaluation of a Scaffolded Software Environment to Improve Engineering Students’ Disciplinary Problem-Solving Skills”, with C. Hundhausen, P. Agrawal, and A. Carter, Journal of Engineering Education100(3), 574, (2011).
  3. Contact Angles and Surface Free Energies of Aluminosilicate Clays as Affected by Relative Humidity and Exchangeable Cations”, with J. Shang, M. Flury, and J. B. Harsh, Colloids and Surfaces A: Physicochemical and Engineering Aspects353, 1 (2010).
  4. The Chem-E-Car Competition and the Integration of Process Safety Management”, with D. Crowl and R. Willey, Process Safety Progress28(1), 1 (2009).
  5. Comparison of Different Methods to Measure Contact Angles of Soil Colloids“, with M. Flury, J. Shang, and J. B. Harsh, Journal of Colloid and Interface Science, 328, 299(2008).