Abstract
Coated fabrics are used more and more in technical applications such as architecture membranes, waterproof, chemically resistant, clothing, tents, shelters, tarpaulins, air bags, etc. They are required to be not only mechanically resistant but also weatherproof, resistant to rain, UV radiation, and soil repellent. Surface properties are very important in these applications. Silicone coatings have been used in this study. The aim here was to study the variation of the surface energy of these coated fabrics in various experimental conditions, with different thicknesses of coating. The method adopted was liquid drop analysis on the coated fabrics. The contact angle between a liquid drop and the fabric surface was measured with two liquids continuously and recorded by a computer. The surface energy was calculated by means of the Owens method. Kinetic measurement was adopted in this study. In this way we found that the contact angle of liquids on the fabric coated silicone decreased with time. A compound solution DX has been found, so that the contact angle of the liquids on the fabric washed with DX becomes constant, and the surface energy of the fabric can be reduced to under 15 mJ/m2.
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