Preparation of fluorine containing water repellent modified with palm oil and its water repellency

A palm oil-modified fluorine-containing water repellent agent,higher fatty acid trifluoroethyl ester,is prepared with palm oil and 2,2,2-trifluoro ethanol as raw materials,and then is applied to water repellent finish of cotton fabric.The structure of the agent is characterized by Fourier Transform Infrared Spectroscopy,and the contact angle,time of waterdrop disappearance,whiteness and breaking strength of the treated fabric are also measured.The optimum process are defined as follows;water repellent agent 40 g/L with ether as a solvent,double-dip-double-nip,predrying at 100 ℃ for 40 min,and curing at 170 ℃ for 3 min.The adhesion status of the water repellent agent on the fabric is observed by SEM,and the permeability of the treated fabric is also tested.The results show that the finished fabric has favorable water repellency and permeability with a slight decrease in whiteness and breaking strength.