双短氟碳链非离子表面活性剂的合成及其应用

以聚乙二醇-600、异佛尔酮二异氰酸酯以及1H,1H,2H,2H-全氟己-1-醇为原料,一锅法合成了一类双短氟碳链非离子表面活性剂(F4-PEG600-F4),通过卡尔费休法,测得其含水量在0.1％以下(有效成分>99.9％).采用FT-IR、1H-NMR对产物结构进行了表征,并研究了其在水溶液中的表面活性.表面张力测...

Synthesis of Double Short Fluorocarbon Nonionic Surfactant and its Application in Leather Fatliquoring

A class of nonionic surfactant(F4-PEG600-F4)containing double short fluorocarbon chains was one-pot synthesized using polyethylene glycol-600,isophorone diisocyanate and 1H,1H,2H,2H-perfluorohexan-1-ol as raw materials.By Karl Fischer method,the water content was measured to be below 0.1%(active ingredients>99.9%).The structure of F4-PEG600-F4 was characterized by FT-IR and 1H-NMR,and its surface activity was studied in aqueous solution.The surface tension results show that the critical micelle concentration of F4-PEG600-F4 was 0.40 mmol/L,and the surface tension could be reduced to 21.0 mN/m(25℃).Moreover,when 1.0%NaCl was added or the pH was adjusted to be 3.0-10.0,the critical surface tension of F4-PEG600-F4 remained basically to be about 21.0 mN/m,showing its good electrolyte and pH resistance stability.Meanwhile,F4-PEG600-F4 was used as a fatliquoring agent in the fatliquoring process of chrome-tanned goatskin.The research results showed that under the conditions of 1%dosage and fatliquoring temperature of 40℃,the resulting leather exhibited the best overall performance,and its softness and mechanical properties were significantly improved.Its tensile strength,elongation at break and tear strength were increased by 19.0%,4.2%and 18.5%respectively,and the waterproof performance of the leather surface was also significantly enhanced,too.