Drying process of micro-scale polymer solution droplets deposited on lyophobic surfaces

Jun Fukai, H. Ishizuka, Y. Sakai, M. Kaneda, M. Morita, Atsushi Takahara

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A micro-scale polymer solution droplet is deposited on a lyophobic surface using an inkjet printing method, and then dried to form a thin polymer film. The shapes of the films formed from xylene-polystyrene (PS) droplets are changed from ring-like to dot-like as the initial PS concentration decreases. Detailed investigations of the drying processes reveal that the pinning time of the contact line dominates the shape and dimension of the polymer film. For ethyl acetate/acetophenone-PS solutions, ethyl acetate rapidly evaporates at the initial stage, but it plays an important role in delaying the pinning time. As a result, this binary solvent forms a dot-like polymer film.

Original languageEnglish
Pages (from-to)137-146
Number of pages10
JournalExperimental Heat Transfer
Volume20
Issue number2
DOIs
Publication statusPublished - Apr 1 2007

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

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