期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Adsorption of polyelectrolyte on the surface of ZnO nanoparticles and the stability of colloidal dispersions 被引量:1
1
作者 liufu shengcong XIAO Hanning LI Yuping 《Chinese Science Bulletin》 SCIE EI CAS 2005年第15期1570-1575,共6页
The present study focuses on the adsorption of a polyelectrolyte, the component of which is a polymer of maleic anhydride sodium salt, on the surface of nanometric zinc oxide particles and the colloidal stability of a... The present study focuses on the adsorption of a polyelectrolyte, the component of which is a polymer of maleic anhydride sodium salt, on the surface of nanometric zinc oxide particles and the colloidal stability of aqueous dispersions. FTIR spectroscopic data provided evidence in support of hydrogen bonding and chemical interaction in the case of the polyelectrolyte-ZnO system. The adsorption iso-therms showed the influences of polyelectrolyte concentra-tion, pH and ionic strength on the adsorption. With the in-crease of pH the saturated adsorbed amount decreased, while the thickness of adsorption layer increased. The saturated adsorbed amount increased with increasing salt concentra-tion, and decreased with further increasing salt concentra-tion. It should be noted that in the presence of a CaCl2 solu-tion the adsorbed amount and the adsorption layer thickness were greater than those in the NaCl solution of the same concentration. The change of the absorbance of zinc oxide dispersions showed that the absorbance decreased slowly at high pH. There was a maximum point for the absorbance of the zinc oxide dispersions in the presence of various polye-lectrolyte concentrations. The change of dispersion stability resulted from the change of macromolecular chains confor-mation at the interface. 展开更多
关键词 聚合电解质 表面吸附 ZNO 纳米粒子 稳定性 胶状物 离散特性
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部