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Effect of temperature on the surface free energy and its polar component of corn stover fibers

YA-LI LI1,*

Affiliation

  1. College of Chemistry & Life Science, Weinan Teachers University, Weinan 714000, Shaanxi, P.R. China

Abstract

The contact angles of three probe liquids on the surface of corn stover fibers treated at different temperatures were tested by capillary rise method. Based on Washburn equation and the method suggested by Owens-wendt-Kaelble, the surface free energy and the corresponding polar and dispersive components were calculated. The results demonstrated that the contact angles of distilled water on corn stover fibers treated at elevated temperatures increased and that of formamide decreased, the surface free energy and the corresponding dispersive component of corn stover fibers were 28.88 mN/m and 6.68 mN/m, respectively. When the heat treatment time was 1 h, as the elevated treated temperature, the surface free energy of corn stover fibers decreased, its dispersive component increased, and its polar component decreased. The reasons for these results were discussed as well in this paper. The results confirm that this method of calculating the surface free energy and its components of cellulosic biomass is a useful and low-cost semi-quantitative measure of the surface characteristics of cellulosic biomass..

Keywords

Contact angle; Surface free energy; Capillary rise method; Corn stover.

Submitted at: Jan. 24, 2013
Accepted at: April 11, 2013

Citation

YA-LI LI, Effect of temperature on the surface free energy and its polar component of corn stover fibers, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 3-4, pp. 264-268 (2013)