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化学学报
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化学学报 ›› 1991, Vol. 49 ›› Issue (4): 340-343. 上一篇    下一篇

研究论文

稀土(III)三硬脂酸盐LB膜的制备及结构研究

杨孔章;肖童;穆劲   

  1. 山东大学胶体与界面化学研究所.济南(250100)
  • 发布日期:1991-04-15

Investigation on preparation and structure of LB films for rare- earth tristearates

Yang Kongzhang;Xiao Tong;Mu Jin   

  1. Shandong Univ., Inst of Colloid and Surface Chem.Jinan(250100)
  • Published:1991-04-15

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被引次数

1

用直接在5×10^-^5mol.dm^-^3稀土(III)氯化物水溶液的液面上铺展稀土(III)三硬脂酸盐(简称LnSt~3)的方法,在疏水光学玻璃片上连续沉积了44层以上的含稀土(III)(La、Nd、Sm、Eu、Tb)硬脂酸盐LB膜,转移比为0.7-0.8。低角度X射线衍射(2θ=0.3-14ⅲ)结果表明,膜的结构为高度有序的层状结构,相邻稀土离子面的间距为4.7-4.8nm。X射线光电子能谱(XPS)证实了五种膜中分别含有La、Nd、Sm、Eu和Tb元素。此外,还对LnSt~3LB膜进行了红外光谱考察,表明在亚相中加入一定浓度的稀土离子能有效地抑止界面上LnSt~3的水解作用,为制备含稀土(III)离子的优质LB膜提供了依据。

关键词: 结构研究, Ｌ-Ｂ膜, 硬脂酸盐, 稀土, 硬脂酸膜, 沉积, Ｘ射线衍射分析, 红外分光光度法

The LB films of rare-earth (La, Nd, Sm, Eu, Tb) tristearates were prepared by means of spreading them directly on the solutions containing 5×10^-^5mol.dm^-^3 corresponding rare-earth trichlorides. The numbers of layers of various rare-earth tristearates could be formed up to 44 on a plate of hydrophobic glass at 25mN.m^-^1, with a transfer ratio of 0.7-0.8. X-ray photoelectron spectroscopy (XPS) verified the presence of La, Nd, Sm, Eu and Tb respectively in corresponding films. IR suggested that no hydrolysis took place in the process of deposition. X-ray diffraction of films in low angle region (0.3-14ⅲ) showed that the films are of periodic layered structure, the space of adjacent face of rare-earth ions is 4.7-4.8nm. According to the area-time curves in the deposition of rare-earth tristearates, there may be a change of film's type.

Key words: L-B MEMBRANE, STEARATE, RARE EARTH, STEARIC ACID FILM, SEDIMENTATION, X-RAY DIFFRACTION ANALYSIS, INFRARED SPECTROPHOTOMETRY

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