Research Paper

Modulation of Polyacrylamide on Phases Compositions of Calcium Oxalate in Aqueous Solutions

  • DENG Sui-Ping ,
  • DENG Lan-Qing ,
  • YU Hai-Yan ,
  • OUYANG Jian-Ming
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  • Institute of Biomineralization and Lithiasis Research, Jinan University, Guangzhou 510632, China

Received date: 2006-05-22

  Revised date: 2006-09-22

  Online published: 2007-05-20

Abstract

The modulation of polyacrylamide (PAM) on the morphology and phase compositions of calcium oxalate crystals was investigated by means of scanning electron microscopy and X-ray powder diffraction. The effects of the concentration of polyacrylamide, pH value in solution and the supersaturation of calcium oxalate on the crystallization of calcium oxalate were discussed. PAM can induce the formation of calcium oxalate dihydrate(COD) crystals and change the morphology of COD and calcium oxalate monohydrate (COM) crystals. In the presence of 5.0g/L of PAM, about 30 percentage (w/w) COD crystals were induced, the aggregated COD crystals were observed, and the shapes of COM crystals were changed from elongated, twinned and aggregated to oval. These results were discussed from the points of molecular structure of PAM, the hydrolysis difference of PAM at various pH values, the interaction between the carboxylic groups of PAM and Ca2+
in solution, the complexation-dissociation balance between the PAM and Ca2+ ions on the surface of COM crystals, and electrostatic interaction etc. The results obtained show that by changing the experimental conditions calcium oxalate crystals with various phase and morphologies can be prepared.

Cite this article

DENG Sui-Ping , DENG Lan-Qing , YU Hai-Yan , OUYANG Jian-Ming . Modulation of Polyacrylamide on Phases Compositions of Calcium Oxalate in Aqueous Solutions[J]. Journal of Inorganic Materials, 2007 , 22(3) : 427 -431 . DOI: 10.3724/SP.J.1077.2007.00427

References

[1] 邓兰青, 欧阳健明. 高分子通报, 2006, 3: 58--64.
[2] Stupp S I, Braun P V. Science, 1997, 277 (5330): 1242--1248.
[3] 杨小毛, 罗来涛, 钟华(YANG Xiao-Mao, et al). 无机材料学报(Journal of Inorganic Materials), 2005, 20 (2): 413--418.
[4] Iijima M, Moriwaki Y. J. Cryst. Growth, 1999, 198/199: 670--676.
[5] Qiu Y, Dong O H, Qi S R, et al. J. Cryst. Growth, 2006, 286: 178--183.
[6] Zhan J H, Yang X G, Wang D W, et al. Adv. Mater., 2000, 12 (18): 1348--1351.
[7] Chen Y, Zhang M L, Jing X Y. Solid State Commol., 2005, 133: 121--123.
[8] Hu Y, Chen W M, Chen J F, et al. Mater. Lett., 2003, 57: 1312--1316.
[9] Jung T, Kim W-S, Choi C K. J. Cryst. Growth, 2005, 279: 154--162.
[10] Donnet M, Jongen N, Lemaitre J, et al. J. Mater. Sci. Lett., 2000, 19: 749--750.
[11] 欧阳健明, 姚秀琼, 苏泽轩, 等. 中国科学, B辑, 2003, 33 (1): 14--19.
[12] Ouyang J M, Deng S P. Dalton Transactions, 2003, 63 (14): 2846--2851.
[13] Zhang D B, Qi L M, Ma J M, et al. Chem. Mater., 2002, 14 (6): 2450--2457.
[14] 刘晓, 陈忠, 曾凡刚. 矿物岩石, 2004, 24 (1): 97--100.
[15] Bouropoulos K, Bouropoulos N, Melekos M, et al. J. Urol., 1998, 159 (5): 1755--1761.
[16] Liang P, Zhao Y, Shen Q, et al. J. Cryst. Growth, 2004, 261: 571--576.
[17] Yu J G, Tang H, Cheng B, et al. J. Solid State Chem., 2004, 177: 3368--3373.
[18] Yu J G, Tang H, Cheng B. J. Colloid Interface Sci., 2005, 288: 407--411.endmulticolsenddocument

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