测定了２－膦酸丁烷－１；２，４－三羧酸（ＰＢＴＣＡ）的电离特性，并通过Ｚｅｔａ电位、粒径分布、沉降、比表面积等手段研究其在Ａｌ２Ｏ３表面的吸附及其对电动特性和稳定性的影响．结果表明；ＰＢＴＣＡ在Ａｌ２Ｏ３表面发生化学吸附，并能显著提高颗粒表面的带电量，从而改善浆料的稳定性．ＦＴＩＲ研究表明；羧基及磷酸基均参与了ＰＢＴＣＡ在Ａｌ２Ｏ３表面的化学吸附，从而提高了吸附强度．通过对沉积物表面ＳＥＭ照片的灰度分析发现，其表面形貌具有分形特征，且悬浮液的稳定性越好，沉积物表面的分维值Ｄｆ越大．
2-phosphonobutane-1,2,4-tricarboxylic acid was used as a dispersant for alumina suspensions. Zeta potential, FTIR, effective diameter，specific
surface area and sedimentation behaviour were studied. It was found that both the phosphonyl and the carboxyl groups participated in the chemical
interaction of PBTCA with alumina. Settling experiments revealed the excellent dispersing ability of PBTCA. The fractal theory was employed
to analyse the surface morphology of sediments. It was showed that the fractal dimension value was closely related to the suspension stability.
参考文献
| [1] | Hidber P C, Graule T J，Gauckler L J. J. Am. Ceram. Soc.?， 1996， 79: 1857--1867. [2] Hidber P C, Graule T J，Gauckler L J. J. Euro. Ceram. Soc.?， 1997， 17: 239--249. [3] Nowack B，Stone A T. J. Colloid Interface Sci., 1999?， 214: 20--30. [4] Laiti E, Ohmann L O. J. Colloid Interface Sci.， 1996?， 183: 441--452. [5] Pierre A C，Ma K. J. Euro. Ceram. Soc., 1999, 19: 1615--1622. [6] Meakin P. Phys. Rev.， 1983, A27: 604. [7] Yang Q F, Ding J, Shen Z Q. Chem. Eng. Sci., 2000, 55: 797--805. [8] Bjelopavlic M, Ralston J, Reynolds G. J. Colloid Interface. Sci., 1998?， 208: 183--190. [9] Mccluskey P H, Snyder R L, Condrate R A. J. Sol. Stat. Chem.?， 1989， 83: 332--339. [10] Anklekar R M，Borkar S A，Bhattacharjee S. Colloids Surf.?， 1998， 133: 41--47. [11] 曹茂盛著. 超微颗粒制备与技术. 哈尔滨: 哈尔滨工业大学出版社，1995. |
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