Evaluation of the surface free energy of plant surfaces: toward standardizing the procedure

Fernández, Victoria and Khayet, Mohamed (2015). Evaluation of the surface free energy of plant surfaces: toward standardizing the procedure. "Frontiers in Plant Science", v. 6 (n. 510); pp. 1-11. https://doi.org/10.3389/fpls.2015.00510.

Description

Title: Evaluation of the surface free energy of plant surfaces: toward standardizing the procedure
Author/s:
  • Fernández, Victoria
  • Khayet, Mohamed
Item Type: Article
Título de Revista/Publicación: Frontiers in Plant Science
Date: 7 July 2015
Volume: 6
Subjects:
Freetext Keywords: Geometric mean; Leaves; Plant surfaces; Surface free energy; 3-Liquids method
Faculty: E.T.S.I. Montes, Forestal y del Medio Natural (UPM)
Department: Sistemas y Recursos Naturales
UPM's Research Group: Genética, Fisiología e Historia Forestal
Creative Commons Licenses: Recognition - Non commercial

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Abstract

Plant surfaces have been found to have a major chemical and physical heterogeneity and play a key protecting role against multiple stress factors. During the last decade, there is a raising interest in examining plant surface properties for the development of biomimetic materials. Contact angle measurement of different liquids is a common tool for characterizing synthetic materials, which is just beginning to be applied to plant surfaces. However, some studies performed with polymers and other materials showed that for the same surface, different surface free energy values may be obtained depending on the number and nature of the test liquids analyzed, materials' properties, and surface free energy calculation methods employed. For 3 rough and 3 rather smooth plant materials, we calculated their surface free energy using 2 or 3 test liquids and 3 different calculation methods. Regardless of the degree of surface roughness, the methods based on 2 test liquids often led to the under- or over-estimation of surface free energies as compared to the results derived from the 3-Liquids method. Given the major chemical and structural diversity of plant surfaces, it is concluded that 3 different liquids must be considered for characterizing materials of unknown physico-chemical properties, which may significantly differ in terms of polar and dispersive interactions. Since there are just few surface free energy data of plant surfaces with the aim of standardizing the calculation procedure and interpretation of the results among for instance, different species, organs, or phenological states, we suggest the use of 3 liquids and the mean surface tension values provided in this study.

More information

Item ID: 37352
DC Identifier: http://oa.upm.es/37352/
OAI Identifier: oai:oa.upm.es:37352
DOI: 10.3389/fpls.2015.00510
Official URL: http://journal.frontiersin.org/article/10.3389/fpls.2015.00510/abstract
Deposited by: Victoria Fernández
Deposited on: 31 Aug 2015 08:39
Last Modified: 31 Aug 2015 08:39
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