MULTIVARIATE ANALYSIS OF THE PHYSICO MECHANICAL PARAMETERS VARIATION FOR HYDROPHOBIC TEXTILE

Abstract

This work presents a multivariate analyse regarding textile surfaces treated with fluorocarbon chemicals in order to obtain hydrophobic effect. The hydrophobic characteristics of the textile samples (cotton 100%) were obtained after hydrophobization treatement in the laboratory, by using chemicals based on fluorocarbon and by process parameters variation (temperature, time). Experimental data were evaluated by means of laboratory tests and multivariate analysis in order to observe covariance and the connections between the process parameters and the final characteristics of the fabric hydrophobizated. For evaluating the hydrophobic effect, some investigations were performed by qualitative method Spraytest for determinating the resistance to surface wetting in accordance with the standard SR EN ISO 4920-2013, air permeability according to SR EN ISO 9237:1999 standard and contact angle computing by using the device VCA Optima for contact angle measuring, in accordance to the standard ASTM D7490-2008. In order to highlight the morphological changes that appear on the cotton fibers, samples were examined using scanning electron microscopy device (SEM) with the magnitude of X2000 X4000, X8000. The purpose of multivariate analysis for parameters and influence factors for hydrophobization process, based on fluorocarbon, is to obtain information relating to the dependent variables and independent, which influence the process. We establish some dependence between parameters (contact angle, spray test resistance, air permeability) by using covariance matrix analysis. This analysis shows that contact angle and the resistance to spray test are in direct dependence and in reverse dependence with the air permeability.

Keywords

• hydrophobic
• textiles
• multivariate
• impact
• environment