Modified vegetable oil in textile finishing applications
AbstractWater-repellent finishing is an important process in textile industries as well as other finishing processes. Coating on the fabric can be used to achieve a substantial water-repellent effect. Using polymeric coatings, however, provided some disadvantages in air and water vapour permeability causing undesirable feelings when wearing. Besides, the fabric treated with polymeric coatings will impart a stiffening appearance, which is undesirable. In this study, water repellents have been prepared from various vegetable oils with different amounts of saturation in fatty acid moiety. Vegetable oil was transesterified with an intermediate fluorinated compound to give modified fatty esters. These fatty esters were utilized as a water repellent in the finishing process of cotton fabrics. Cotton fabrics were treated with modified fatty esters obtained from rice barn oil comparative to those obtained from sunflower oil and palm oil. Water-repellent ability, yellowing and softness of fabrics after treated were evaluated as a function of the amount of water repellant used in finishing. The results showed that the palm oil ester derivative imparted a higher water repellency than other oils. However, finished fabrics tended to have a slightly yellowing with ester derivatives of oils.
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