Adsorption of PAA on the α-Al2O3 surface

H. Y.T. Chen, W. C.J. Wei*, K. C. Hsu, C. S. Chen

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

18 引文 斯高帕斯(Scopus)

摘要

The specific system of interest is the polyacrylic acid (PAA) and (0001) α-Al2O3 surface, which was modeled and simulated by Cerius2 4.9 software with empirical potentials. The simulation predicted that the adsorbed conformations of PAA with a molecular weight (Mw) of 5000 were train and tail at pH <4 and >10, respectively. After gradually inserting additional PAA molecular chains, the adsorption reached a saturated amount. Gel permeation chromatography experimental results showed that the adsorption amount at pH 3.6 was three times greater than that at pH 11. Based on the results from simulations and experiments, a successively increasing pH environment was modeled to illustrate the possibility of optimizing electro-steric effects by combining the higher adsorption density at a lower pH and strong steric repulsion of tail-adsorbed configuration at a higher pH.

原文英語
頁(從 - 到)1709-1716
頁數8
期刊Journal of the American Ceramic Society
90
發行號6
DOIs
出版狀態已發佈 - 2007 六月

ASJC Scopus subject areas

  • 陶瓷和複合材料
  • 材料化學

指紋

深入研究「Adsorption of PAA on the α-Al<sub>2</sub>O<sub>3</sub> surface」主題。共同形成了獨特的指紋。

引用此