氧化-磷酸酯化亚麻油加脂剂制备及作用机理

Preparation and Mechanism of Oxidizing-Phosphates Linoleum Fatliquor

摘要:

以亚麻油、过氧化氢为原料，首先合成了环氧值分别为1.16mmol/g、1.52mmol/g和2.32mmol/g三种环氧亚麻油，再与定量的磷酸进行酯化反应，合成了LCF-P1、LCF-P2和LCF-P3三种结合型氧化-磷酸酯亚麻油皮革加脂剂。将其应用于皮革加脂，探究了不同环氧化程度对氧化-磷酸酯化皮革加脂剂的加脂性能影响，并与市售磷酸酯加脂剂进行了加脂效果对比；用扫描电镜(SEM)观察了皮革加脂前后断面胶原纤维形貌变化。实验结果表明：环氧值为1.52mmol/g的加脂剂LCF-P2表现出良好的加脂性能，加脂后皮革柔软度达10mm，抗张强度为35.91 N/mm2, 撕裂强度为49.56 N/mm，皮革增厚率为24.36%，在皮革增厚率、机械强度提高方面略优于市售磷酸酯加脂剂。

Abstract:

Using linseed oil and hydrogen peroxide as raw materials, three epoxy linseed oils with epoxy values of 1.16mmol/g, 1.52mmol/g and 2.32mmol/g were synthesized first, and then esterified with quantitative phosphoric acid to synthesize LCF-P1 and LCF-P2 and LCF-P3 three combined oxidized-phosphate linseed oil leather fatliquors. It was applied to leather fatliquoring, and the effect of different degrees of epoxidation on the fatliquoring performance of oxidized-phosphorylated leather fatliquors was explored, and the fatliquoring effect was compared with the commercial phosphate fatliquors. SEM was used to observe the morphology of collagen fibers in the cross section of leather before and after fatliquoring. The experimental results show that LCF-P2, a fatliquor with an epoxy value of 1.52mmol/g, shows good fatliquoring performance, the softness of the grey leather after fatliquoring reached 10 mm, the tensile strength was 35.91 N/mm2, the tear strength was 49.56 N/mm and the thickening rate of leather was 24.36%. In leather thickening rate, mechanical strength improvement slightly better than the market phosphate fatliquoring agent.