Influnence of sodium polyacrylate on crystallization and aggregation of butterfly-like calcium carbonate

2013 ◽  
Vol 29 (5) ◽  
pp. 969-973 ◽  
Author(s):  
Li-na Zhao ◽  
Ji-ku Wang ◽  
Zi-chen Wang
Keyword(s):  
Calcium Carbonate ◽  
Sodium Polyacrylate

Rheology investigations on the influence of addition sodium polyacrylate to calcium carbonate suspensions

2010 ◽  
Vol 372 (1-3) ◽  
pp. 9-14 ◽  
Author(s):  
Deng Deng ◽  
Volodymyr Boyko ◽  
Sabrina Montero Pancera ◽  
Nikolaus Nestle ◽  
Tharwat Tadros
Keyword(s):  
Calcium Carbonate ◽  
Sodium Polyacrylate

Effect of sodium polyacrylate molecular weight on the crystallogenesis of calcium carbonate

2007 ◽  
Vol 306 (2) ◽  
pp. 373-382 ◽  
Author(s):  
A. Jada ◽  
R. Ait Akbour ◽  
C. Jacquemet ◽  
J.M. Suau ◽  
O. Guerret
Keyword(s):  
Molecular Weight ◽  
Calcium Carbonate ◽  
Sodium Polyacrylate

Optimization of the microstructure of carbonized lime mud by sodium polyacrylate

2019 ◽  
Vol 34 (3) ◽  
pp. 264-270
Author(s):  
Jian Wang ◽  
Yaowei Xu ◽  
Zhijie Wang ◽  
Jianpeng Sun ◽  
Min Liu
Keyword(s):  
Calcium Carbonate ◽  
Structural Changes ◽  
Surface Microstructure ◽  
Sodium Polyacrylate ◽  
Application Performance ◽  
Carbonization Process ◽  
Lime Mud ◽  
Carbonate Particle ◽  
Paper Filler ◽  
Calcium Carbonate Particle

Abstract Lime mud (LM) is a by-product originated from the causticization process of papermaking industry. Microscopic structural changes of LM in carbonization process lead to defects on its performance. Regulating the growth of calcium carbonate obtained from the carbonization process and preventing its influence on the surface microstructure of LM has become the key to achieve the self-digestion of this solid waste. In this study, microscopic structural changes of LM co-carbonized with sodium polyacrylate (PAAS) were investigated. The results showed that, compared with traditional carbonation, the microstructure of LM co-carbonized with PAAS was changed remarkably. The newly calcium carbonate formed in the carbonization process would be solidified and coated on the LM surface. Then LM co-carbonized with PAAS would have a smaller specific surface area, pore volume and pore size, which significantly improved its application performance when it was used as paper filler. In addition, a potential technique for improving the surface microstructure of calcium carbonate particle was proposed.

Impact of Sodium Polyacrylate on the Amorphous Calcium Carbonate Formation from Supersaturated Solution

Langmuir ◽  
2012 ◽  
Vol 28 (7) ◽  
pp. 3593-3605 ◽  
Author(s):  
J. Liu ◽  
S. Pancera ◽  
V. Boyko ◽  
J. Gummel ◽  
R. Nayuk ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Supersaturated Solution ◽  
Sodium Polyacrylate ◽  
Amorphous Calcium Carbonate ◽  
Carbonate Formation

A TEM study of the microstructure of avian eggshells

1992 ◽  
Vol 50 (2) ◽  
pp. 1102-1103
Author(s):  
S. Q. Xiao ◽  
S. Baden ◽  
A. H. Heuer
Keyword(s):  
Electron Microscope ◽  
Calcium Carbonate ◽  
Nucleation And Growth ◽  
Growth Mechanisms ◽  
Shell Surface ◽  
Thin Sections ◽  
Polycrystalline Metals ◽  
Transmission Electron ◽  
Nucleation And Growth Mechanisms

The avian eggshell is one of the most rapidly mineralizing biological systems known. In situ, 5g of calcium carbonate are crystallized in less than 20 hrs to fabricate the shell. Although there have been much work about the formation of eggshells, controversy about the nucleation and growth mechanisms of the calcite crystals, and their texture in the eggshell, still remain unclear. In this report the microstructure and microchemistry of avian eggshells have been analyzed using transmission electron microscope (TEM) and energy dispersive spectroscopy (EDS).Fresh white and dry brown eggshells were broken and fixed in Karnosky's fixative (kaltitanden) for 2 hrs, then rinsed in distilled H2O. Small speckles of the eggshells were embedded in Spurr medium and thin sections were made ultramicrotome.The crystalline part of eggshells are composed of many small plate-like calcite grains, whose plate normals are approximately parallel to the shell surface. The sizes of the grains are about 0.3×0.3×1 μm3 (Fig.l). These grains are not as closely packed as man-made polycrystalline metals and ceramics, and small gaps between adjacent grains are visible indicating the absence of conventional grain boundaries.

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