Abstract
The application of silane adsorbents for water- and oil-repellent treatment of textile products was developed. As a fluoroalkyl-trimethoxysilane, heptadecafluoro-1,2-tetrahydrodecyl-1,1,1-trimethoxysilane was used, and tetramethoxysilane (TMOS) as a cross-linker, was used. The effects of the concentrations of the cross-linker and promoter were investigated in detail. Further, the effect of adding another silane adsorbent and a suitable solvent were examined. The treatment was found to be effective in imparting antistain properties to silk and cotton fabrics. Moreover, by adding the cross-linker to the adsorption solution, the wash durability and abrasion resistance of these fabrics were improved. In order to obtain similar water- and oil-repellent properties, the solute concentrations required with methanol as a solvent are twice of those required with a hydrocarbon solvent (ShellSol® D40). Although the use of alcohol as a solvent may be nature-friendly, its drawback was a short pot life. On the other hand, the addition of a long silane adsorbent (OPTOOL® DSX) and a promoter (Sila-Ace® S-340) was concluded to be unfavorable for imparting the oil-repellent characteristics to fabrics.
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