表面羧基化纳米ZnO的制备及应用

Preparation and application of surface carboxyl-functioned nano ZnO

采用硅烷偶联剂A-151对纳米氧化锌进行改性,得到表面含双键的纳米ZnO,进而将其与甲基丙烯酸(MAA)通过自由基聚合法制备表面含有羧基的纳米ZnO.采用动态激光光散射(DLS)、傅里叶红外变换光谱(FT-IR)和透射电镜(TEM)对表面羧基化纳米ZnO的结构和形貌进行了表征.结果表明:表面羧基化的ZnO的粒径约为100nm,该粒子具有良好的亲水性.将表面羧基化的纳米ZnO配合铬粉应用于制革鞣制工艺中,应用结果表明:当mZnO∶mMAA为1∶2时,制备的表面羧基化纳米ZnO鞣制后坯革有较好的收缩温度和增厚率,且鞣制后的坯革对金黄色葡萄球菌具有良好的抑菌性能.

The nano ZnO was modified by silane coupling agent A-151 to obtain nano ZnO with double bonds on the surface,and then the surface carboxyl-functioned nano ZnO were prepared by the modified nano ZnO and methacrylic acid（MAA）through free radical polymerization.The structure and morphology of the surface carboxyl-functioned nano ZnO were investigated using dynamic light scattering（DLS）,fourier transform infrared spectroscopy（FT-IR）,transmission electron microscopy（TEM）,its shows that the particle size was about100 nm,and the surface carboxyl-functioned nano ZnO was hydrophilic.The surface carboxyl-functioned nano ZnO fit with chrome were applied to the leather tanning process,it turns out that the crust leather has a better shrinkage temperature and thickness increment rate when the mZnO∶mMAA was 1∶2,and the crust leather has good antimicrobial activity against S.aureus.