Phase transformation of amorphous calcium carbonate to single-crystalline aragonite with macroscopic layered structure in the presence of egg white protein and zinc ion

2015 ◽  
Vol 30 (1) ◽  
pp. 65-70 ◽  
Author(s):  
Hui Zeng ◽  
Jingjing Xie ◽  
Hang Ping ◽  
Menghu Wang ◽  
Hao Xie ◽  
...  
2012 ◽  
Vol 13 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Yang-Yi Liu ◽  
Jun Jiang ◽  
Min-Rui Gao ◽  
Bo Yu ◽  
Li-Bo Mao ◽  
...  

2011 ◽  
Vol 197-198 ◽  
pp. 199-202 ◽  
Author(s):  
Wen Kun Zhu ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Jing He

The calcium carbonate crystallization were controlled by Ca2+ concentration in the 10% (V/V) egg white protein solution and the morphology, structure and thermal decomposition of which were characterized by FT-IR, SEM, XRD and TG. The results showed in egg white protein solution system, concentration of Ca2+ had significant effects on the crystallized morphology, orientation and crystallinity of calcium carbonate. Calcium carbonate particles have more uniformed calcite and vaterite mixed crystallization in low Ca2+ concentration while calcium carbonate tends to form mixed particle sizes and more complete calcite crystallization in high Ca2+ concentration.


2008 ◽  
Vol 310 (16) ◽  
pp. 3779-3787 ◽  
Author(s):  
Xu-Rong Xu ◽  
An-Hua Cai ◽  
Rui Liu ◽  
Hai-Hua Pan ◽  
Rui-Kang Tang ◽  
...  

2008 ◽  
Vol 112 (30) ◽  
pp. 11324-11330 ◽  
Author(s):  
Anhua Cai ◽  
Xurong Xu ◽  
Haihua Pan ◽  
Jinhui Tao ◽  
Rui Liu ◽  
...  

Author(s):  
Jesús Rodríguez-Sánchez ◽  
Teresa Liberto ◽  
Catherine Barentin ◽  
Dag Kristian Dysthe

Calcium carbonate cements have been synthesized by mixing amorphous calcium carbonate and vaterite powders with water to form a cement paste and study how mechanical strength is created during the setting reaction. In-situ XRD was used to monitor the transformation of ACC and vaterite phases into calcite and a rotational rheometer was used to monitor the strength evolution. There are two characteristic time scales of the strengthening of the cement paste. The short timescale of the order 1 hour is controlled by smoothening of the vaterite grains, allowing closer and therefore adhesive contacts between the grains. The long timescale of the order 10-50 hours is controlled by the phase transformation of vaterite into calcite. This transformation is, unlike in previous studies using stirred reactors, found to be mainly controlled by diffusion in the liquid phase. The evolution of shear strength with solid volume fraction is best explained by a fractal model of the paste structure.


CrystEngComm ◽  
2018 ◽  
Vol 20 (21) ◽  
pp. 2902-2906
Author(s):  
Zhaoyong Zou ◽  
Luca Bertinetti ◽  
Wouter J. E. M. Habraken ◽  
Peter Fratzl

Micrometer-sized metastable amorphous calcium carbonate with a multi-level interconnected porous structure is transformed from highly hydrated crystalline ikaite by fast dehydration.


2011 ◽  
Vol 675-677 ◽  
pp. 349-352 ◽  
Author(s):  
Wen Kun Zhu ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Jian Zhou ◽  
Yan Lu

Various crystal forms of calcium carbonate were successfully synthesized with CaCl2 and Na2CO3 in 10%(V/V) egg white protein solution system at 20 °C, 40 °C and 60 °C, respectively. The obtained calcium carbonate were characterized by SEM, XRD, FTIR and TG. In addition, the possible mechanism of crystal formation were analyzed. The results indicated that egg white protein could regulate the crystal forms of calcium carbonate and the calcium carbonate, which contained a small amount of egg white protein and consisted of mixed calcite and aragonite, was mainly spherical. With the temperature rosing, the vaterite content gradually increased while the calcite decreased.


2012 ◽  
Vol 98 (1) ◽  
pp. 262-270 ◽  
Author(s):  
Y. Sugiura ◽  
K. Onuma ◽  
Y. Kimura ◽  
K. Tsukamoto ◽  
A. Yamazaki

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