纳米SiO2鞣革的防霉性研究

以聚合物或改性油脂作为纳米粒子前驱体的分散载体,可以将纳米粒子前驱体引入革纤维间隙间;纳米前驱体在一定pH条件下水解原位产生无机纳米粒子,通过无机纳米粒子和蛋白质间的有机-无机杂化作用,实现对生皮的鞣制。研究了无机纳米粒子和蛋白质的作用机理,有机无机纳米杂化对成革热稳定性的影响以及无机纳米粒子在革纤维中的尺寸大小及其分布,并选择黄曲霉、黑曲霉和拟青霉作为代表菌种,采用圆片培养皿法,研究纳米粒子的引入对成革防霉性的影响。结果表明,无机纳米粒子在蛋白质纤维中分布均匀,粒径小于150 nm;与铬鞣革相比,纳米鞣革对黑曲霉和拟青霉生长具有明显的抑制作用,铬鞣革培养3天开始有霉菌生长,而纳米SiO2鞣革培养4天也没有霉菌生长,显示了良好的防霉性能。

Study on the Antifungal Effect of Leather Tanned with Nano-SiO2

When a polymer or modified oil was used as dispersion supporter,a precursor which,in situ,produces nano-SiO2 under suitable condition was introduced into the collagen fibers.During the hydrolysis of precursor,nano-SiO2 particles formed and reacted rapidly with the active groups of collagen.As a result,the thermal stability of hide was increased and the tanning process was completed.Meanwhile the size scale and the distribution of SiO2 particles in protein,the nano-hybrid mechanism between organic and inorganic phase as well as the antifungal effect of final leather to Aspergillus niger,Aspergillus flavus and Paecilomyces Bainier were investigated.The results indicated that two chemical bondings occurred between two phases,and the nano-particles were evenly distributed in the protein and the size of nano-SiO2 was lower than 150 nm.In a comparison with chrome tanned leather,nano-SiO2 treated pigskin which was incubated for 4 days had no mildew,while the chrome-treated pigskin which was incubated for 3 days began to grow mildew,the former showed the excellent antifungal characteristics.