丙烯酸酯/含铬蛋白接枝乳液的制备及应用

Preparation and Application of Acrylate / Chromium-Containing Protein Grafted Emulsion

用含铬皮革废弃物制得含铬蛋白液,然后用丙烯酸(酯)类单体与含铬蛋白进行接枝反应,分别制得自乳化和外乳化的蛋白-丙烯酸接枝乳液,研究了它们作为制革复鞣剂的应用效果。使用Zeta电位、高速离心及蒸馏水稀释考察乳液的稳定性,结果显示,外乳化蛋白-丙烯酸乳液的稳定性强于自乳化蛋白-丙烯酸乳液。使用茚三酮显色液和红外光谱,证明了接枝反应的发生,自乳化蛋白-丙烯酸乳液的接枝率(PG)和接枝效率(GE)分别为94.37%和56.62%,外乳化蛋白-丙烯酸乳液的PG和GE分别为113.05%和67.83%。应用试验显示,蛋白-丙烯酸乳液复鞣填充效果明显,自乳化蛋白-丙烯酸乳液增厚效果优于外乳化蛋白-丙烯酸乳液。

The self-emulsified latex and external emulsified latex were prepared from acrylic （acrylate） monomer grafted chromium-containing protein which had been extracted from tannery solid wastes, and their application properties as retanning agent were investigated. The stability of the two kinds of latexes were analyzed by Zeta potential analyzer and high-velocity centrifuge, and the results indicate that the external emulsified latex had a better stability than self-emulsified latex. Ninhydrin color reaction and FTIR spectra proved the existence of acrylate polymer grafted protein polypeptide. Self-emulsified latex＇ s percent grafting （PG） and grafting efficiency （ GE ） were 94. 37% and 56.62% and external emulsified latex＇s were 113.05% and 67.83%, respectively. Application research revealed that the latex had significant retanning effect on wet-chromed bovine hide, and the thickening effect of the self- emulsified latex was better than that of the external emulsified latex.