Surface free energy of solids by contact angle measurements.

Abstract

Surface energy is very important concept in the materials science and engineering. For solids, this can be calculated from contact angle measurements and different theoretical approximations; however, when a membrane is the object of study, porosity can be considered to be the main factor affecting the measures of contact angle and, in consequence, the results of surface energy. The objectives of this article is the performing of the theoretical description for the determination of surface energy from contact angle measures and to give key points for physical interpretation of data and illustrate its application for characterization of polymeric materials.

A Sustainable Approach to a Cleaner Production of Antimicrobial and Biocompatible Protein Fibers

“…The values recorded for the raw wool fabrics, approximately 120°, were similar to other data reported in the literature [ 40 ].…”

“…The rough surface of the wool fibers and the fabrics manufactured from wool, which was demonstrated using SEM microscopy, is the main challenge in reaching a precise and accurate contact angle measurement [ 40 ]. In order to achieve greater accuracy, for this test, we used wool fabric instead of wool fibers.…”

“…The physicochemical properties of a surface, such as wettability and roughness, are related to interactions that occur when the material comes into contact with body fluids (water and protein adsorption and cell adhesion) [ 43 , 44 ]. Depending on the intended use (implant, patches, ocular lens), the interfacial tension of a biomaterial coming into contact with biological fluids will have different values [ 40 ]. For a biomaterial that is designed to be used as a tissue engineering scaffold, the interfacial tension must be in the range of 1–3 mN/m for biocompatibility to be achieved [ 45 , 46 ].…”

“…The rough surface of the wool fibers and th was demonstrated using SEM microscopy, is the accurate contact angle measurement [40]. In orde we used wool fabric instead of wool fibers.…”

Multiple surface interaction mechanisms direct the anchoring, co-aggregation and formation of dual-species biofilm between Candida albicans and Helicobacter pylori

“…In all cases, measurements were performed in quadruplicate. Total surface free energy of biofilm was calculated using the van Oss-Chaudhury-Good theory, contact angles, surface free energy of working liquids and their components [39] , [40] . Software Surface-Q was used for calculations (Mindtech s.a.s., Colombia).…”