Crystallization of aragonite CaCO3 with complex structures

Guo, Hongxia; Qin, Zhenping; Qian, Peng‐Cheng; Yu, Peng; Cui, Suping; Wang, Wei

doi:10.1016/j.apt.2010.11.004

Cited by 56 publications

(49 citation statements)

References 31 publications

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“…For aragonite, this vibration appears at ca. 855 cm -1 , whereas for calcite and vaterite crystals, the positions of the corresponding m 2 vibrations are very similar and appear at about 875 cm -1 (Cizer et al 2012;Guo et al 2011;Klinkaewnarong and Utara 2018;Stoica-Guzun et al 2012;Vagenas et al 2003). In the present case, a sharp peaks at 873 and 852 cm -1 on all spectra as in Fig.…”

Section: Structural Evaluation Of Acnf/pcc Nanopaperssupporting

confidence: 57%

Effect of ultrasonication on physicochemical properties of apple based nanocellulose-calcium carbonate composites

et al. 2018

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In order to improve optical properties of materials made of nanocellulose and also minimalize costs, small amounts of mineral fillers such as different forms of calcium carbonate are added. In this work nanocellulose was obtained from apple pomace. The precipitated calcium carbonate (PCC) in amount of 3.74 ± 1.36% of a sample dry matter was deposited on cellulose fibers during isolation process. Isolated cellulose was then treated with ultrasonic method in order to obtain apple cellulose nanofibrills (ACNF)/ PCC nanocomposites. Different ultrasonication conditions were applied in order to evaluate how time (0-60 min) and power (0-400 W) influence on the ACNF/PCC nanocomposites properties. Moreover structure, chemical composition, morphology and rheological properties of both cellulose and composites were characterized. Also the mechanical properties of nanopapers made of ACNF/PCC nanocellulose were measured. The nanofibril structure of ultrasound processed cellulose was confirmed. In all cases samples were pseudoplastic fluids with quite low viscosity. The mean hydrodynamic diameter of particle dispersions decreased the most after use of ultrasounds for 60 min and the obtained dispersions were also the most homogeneous. The elastic modulus of obtained nanopapers were 2-3 GPa and tensile strength 60-70 MPa and in general ultrasonication improved their rigidity.

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Section: Structural Evaluation Of Acnf/pcc Nanopaperssupporting

confidence: 57%

Effect of ultrasonication on physicochemical properties of apple based nanocellulose-calcium carbonate composites

et al. 2018

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“…One of the leading biomaterials which has been intensely investigated is the inorganic calcium carbonate (CaCO 3 ) material. In general, it is well documented that calcium carbonate exists in three types of polymorph, which are calcite, aragonite, and vaterite [7][8][9][10][11][12][13][14][15]. Each of these polymorphisms possesses different properties which determine their special characteristics [5].…”

Section: Introductionmentioning

confidence: 99%

“…Each of these polymorphisms possesses different properties which determine their special characteristics [5]. In fact, numerous studies on both the physical and chemical properties of calcium carbonate polymorphisms have been accomplished since several decades ago [2,3,5,[12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, aragonite polymorph of calcium carbonate has been proven to have high potential as a good biomedical material to be integrated, resolved, and replaced by bones owing to its unique characteristics for diverse medical uses [7,8,11,23]. Although aragonite is thermodynamically less stable than calcite at ambient temperature and pressure, it is well known to be denser than calcite [2, 6-8, 11, 17, 22], 2 Journal of Nanoparticles sensitive towards temperature changes [13,15,24,25], comprising some morphological varieties [8,11,21,22,25], having high mechanical strength [7,8,22], and biocompatible and biodegradable [7-9, 11, 21, 22, 26]. Hence, this material has become a current focus in many research areas, particularly biomedical research area including targeted drug delivery [22] and bone tissue engineering [10,20].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, particle's surface modification has been widely documented to improve various physical and chemical aspects of the particles [11,18,[28][29][30][31][32]. In fact, numerous functional applications of calcium carbonate depend on its controlled surface properties during the synthesis process [11,13,24,[28][29][30][31][32]. Therefore, the relevance of surface functionalization for cockle shell-based calcium carbonate aragonite polymorph nanoparticles will be herein discussed.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Cockle Shell-Based Calcium Carbonate Aragonite Polymorph Nanoparticles with Surface Functionalization

Ghafar

Hussein

Zakaria

2017

Journal of Nanoparticles

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The development of cockle shell-based calcium carbonate aragonite polymorph nanoparticle synthesis method using the technique of mechanical stirring in the presence of dodecyl dimethyl betaine (BS-12) incorporated with surface functionalization demonstrated high homogeneity of sample product with good nanoparticles dispersion. The cockle shell-based calcium carbonate aragonite nanoparticle with functionalized surface was characterized using transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), particle size distribution, pH measurement analysis, Fourier Transform Infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). Surface functionalization was proven to improve the overall size and shape of the nanoparticles and enhance their dispersion properties, preventing coarse agglomeration among nanoparticles in general. The improved method was verified to retain its aragonite crystalline nature. Additionally, surface functionalization did not increase the size of nanoparticles throughout the modification process. This facile preparation using naturally occurring cockle shells as the main source is environmentally friendly because it provides relatively low cost of raw material source as it is abundantly available in nature and has good mineral purity content. Hence, high quality production of surface functionalized cockle shell-based calcium carbonate aragonite polymorph nanoparticles can potentially be exploited and produced on a large scale for various industrial applications, especially for biomedical purposes in the near future.

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Synthesis of aragonite CaCO₃ nanocrystals by reactive crystallization in a high shear mixer

Yang

Zhang

et al. 2017

Crystal Research and Technology

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Aragonite CaCO 3 nanoparticles were prepared in an in-line high shear mixer (HSM)-aided crystallizer involving the gasliquid-solid (G-L-S) multiphase reactive crystallization between CO 2 gas and the aqueous slurry of Ca(OH) 2 . High crystalline purity aragonite CaCO 3 with the average width of 50 nm and the length/width ratio of 10 were prepared in the HSM-aided crystallizer. Major factors including temperature, CO 2 flow rate and high shear rates had been studied to adjust the polymorph and the morphology of CaCO 3 nanoparticles. The results indicate that the high rotor rates of HSM generate sufficient micro-mixing level in the reactive crystallization, beneficial to the formation of metastable crystal CaCO 3 . Such HSM-aided crystallizer is superior to adjust the micro-mixing environment in the multiphase reactive crystallization, providing a facile pathway to modulate the morphology and crystal growth of metastable crystals.

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Crystallization of aragonite CaCO3 with complex structures

Cited by 56 publications

References 31 publications

Effect of ultrasonication on physicochemical properties of apple based nanocellulose-calcium carbonate composites

Effect of ultrasonication on physicochemical properties of apple based nanocellulose-calcium carbonate composites

Synthesis and Characterization of Cockle Shell-Based Calcium Carbonate Aragonite Polymorph Nanoparticles with Surface Functionalization

Synthesis of aragonite CaCO₃ nanocrystals by reactive crystallization in a high shear mixer

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Crystallization of aragonite CaCO3 with complex structures

Cited by 56 publications

References 31 publications

Effect of ultrasonication on physicochemical properties of apple based nanocellulose-calcium carbonate composites

Effect of ultrasonication on physicochemical properties of apple based nanocellulose-calcium carbonate composites

Synthesis and Characterization of Cockle Shell-Based Calcium Carbonate Aragonite Polymorph Nanoparticles with Surface Functionalization

Synthesis of aragonite CaCO3 nanocrystals by reactive crystallization in a high shear mixer

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Synthesis of aragonite CaCO₃ nanocrystals by reactive crystallization in a high shear mixer