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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Particle size control and dependence on solution pH of carboxylate-alumoxane nanoparticles
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Particle size control and dependence on solution pH of carboxylate-alumoxane nanoparticles

机译：羧酸盐-铝氧烷纳米颗粒的粒径控制和对溶液pH的依赖性

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摘要

A series of water dispersible carboxylate-alumoxane nanoparticles were prepared by the reaction of various carboxylic acids with the mineral boehmite. The acids used were: acetic (A-H), methoxyacetic (MA-H), methoxyethoxyacetic (MEA-H), methoxyethoxyethoxyacetic (MEEA-H), and lysine (L-H). For each of the derived carboxylate-alumoxanes, particle size measurements were obtained by means of photon correlation spectroscopy (PCS) as a function of solution pH. In all cases, at higher pHs, slight increases in solution basicity corresponded it) large increases in particle size. At lower pHs, however, changes in solution basicity yielded only slight to moderate increases in particle size. It was also found during these investigations that methoxyacetic-alumoxane (MA-A) had a large buffering capacity, and that this effect could be explained by correlation with the aluminum:carboxylate group ratio for the various carboxylate-alumoxanes. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 21]
机译：通过各种羧酸与勃姆石矿物的反应，制备了一系列水分散性羧酸铝氧烷纳米颗粒。所使用的酸为：乙酸（A-H），甲氧基乙酸（MA-H），甲氧基乙氧基乙酸（MEA-H），甲氧基乙氧基乙氧基乙酸（MEEA-H）和赖氨酸（L-H）。对于每种衍生的羧酸盐-铝氧烷，均通过光子相关光谱法（PCS）获得了溶液pH值的粒度测量值。在所有情况下，在较高的pH值下，溶液碱度的轻微增加都与之相应。但是，在较低的pH值下，溶液碱度的变化只会使粒径略有增加。在这些研究中还发现，甲氧基乙酸铝氧烷（MA-A）具有较大的缓冲能力，并且可以通过与各种羧酸铝氧烷的铝：羧酸根基团比率相关来解释这种作用。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：21]

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