一种用于解释三仲丁氧基铝水解过程中形成的拟薄水铝石的微晶堆积模型，以说明其胶溶性能。

A crystallite packing model for pseudoboehmite formed during the hydrolysis of trisecbutoxyaluminium to explain the peptizability.

作者信息

Martens Wayde N, Kloprogge J Theo, Frost Ray L, Bartlett John R

机构信息

Centre for Instrumental and Developmental Chemistry, Queensland University of Technology, GPO Box 2434, 2 George Street, Brisbane, Queensland, 4001, Australia.

出版信息

J Colloid Interface Sci. 2002 Mar 1;247(1):132-7. doi: 10.1006/jcis.2001.8079.

DOI:10.1006/jcis.2001.8079

PMID:16290448

Abstract

A model for pseudoboehmite crystallite packing formed during the hydrolysis of trisecbutoxyaluminium is postulated. The model describes platelike crystallites of pseudoboehmite stacked in a sharing edges only configuration. With this type of stacking, the pore sizes detected are approximately equal to the crystallite sizes of the hydrolysates. The hydrolysates age via a dissolution re-precipitation reaction. This increases the size of the crystallite size of the pseudoboehmite formed, speeding peptization by allowing nitrate ions to enter pores and access the surfaces of the crystallites. This type of model also allows an explanation for the peptization kinetics of systems containing sec-butanol formed during the hydrolysis of trisecbutoxyaluminium.

摘要

提出了一种在三仲丁氧基铝水解过程中形成的拟薄水铝石微晶堆积模型。该模型描述了拟薄水铝石的板状微晶仅以共边构型堆叠。通过这种堆叠类型，检测到的孔径大约等于水解产物的微晶尺寸。水解产物通过溶解再沉淀反应老化。这增加了所形成的拟薄水铝石微晶的尺寸，通过允许硝酸根离子进入孔并接触微晶表面来加速胶溶作用。这种类型的模型还可以解释在三仲丁氧基铝水解过程中形成的含仲丁醇体系的胶溶动力学。