One-step facile synthesis of CaCO3 nanoparticles via mechano-chemical route

Sargheini, J.; Ataie, A.; Salili, Seyyed Muhammad; Hoseinion, A.A.

doi:10.1016/j.powtec.2011.12.011

Cited by 29 publications

(13 citation statements)

References 15 publications

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“…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%

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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Section: Introductionmentioning

confidence: 99%

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 mechanical energy is the driving force of the solid replacement reaction between CaCl 2 and Na 2 CO 3 . 18,19 Shorter milling time and lower milling speed lowers the driving force for the reaction system, which results in an uncompleted reaction and the disordered arrangement of Ca 2+ and CO 3 2− ions in CaCO 3 as well as poor crystallization of calcite ( Figure 1A,B) or the formation of ACC ( Figure 1D). The reaction was complete, and the crystallization of calcite improved with prolonged milling time and increased milling speed due to an increase in the driving force.…”

Section: Effect Of Milling Times and Milling Speeds On The Polymorpmentioning

confidence: 99%

“…[13][14][15][16][17] However, the mechanochemical preparation of CaCO 3 powder is rare. 18,19 Tsuzuki et al obtained CaCO 3 product and sodium chloride (NaCl) byproduct by milling a solid mixture of CaCl 2 , Na 2 CO 3 and NaCl, in which NaCl was used as the salt diluent. 18 The authors found that the solid reaction was completed at 4 hours, and the average size of the CaCO 3 particles decreased from 142 to 77 nm when the molar ratio of the salt diluent to CaCl 2 /Na 2 CO 3 increased from 1.5:1 to 8.3:1.…”

Section: Introductionmentioning

confidence: 99%

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The mechanochemical route of vaterite synthesis using sodium hexametaphosphate as an inorganic additive

Chen

et al. 2019

J Am Ceram Soc

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Vaterite is a metastable phase of CaCO3 and was prepared mechanochemically for the first time with the assistance of sodium hexametaphosphate (SHMP). First, CaCO3 was prepared without SHMP and was characterized using X‐ray diffraction (XRD) to study the effect of milling times and speeds on the polymorphs of product. The results indicate that the reaction is complete at 60 minutes producing only calcite. Additionally, amorphous CaCO3 (ACC) was obtained at a milling speed of 300 rpm, while calcite was obtained at 600 and 1000 rpm. Then, the effect of SHMP concentration on the fraction of vaterite was investigated, and the vaterite fraction increased with increasing SHMP amount. Subsequently, the effect of milling speed in the presence of 0.8 g of SHMP was studied, and the vaterite fraction increased with decreasing milling speed. Finally, gentler manual milling was employed, and the effect of the amount of added SHMP on vaterite formation was evaluated. The results confirmed that vaterite increased with increasing amounts of SHMP, and that vaterite formed more readily via manual milling than via mechanical milling. Observations with scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show that calcite and vaterite particles formed by mechanical milling were irregular agglomerates composed of primary nanoparticles while calcite particles formed by manual milling were irregular microparticles. Moreover, vaterite readily aggregated into spherical particles as the amount of SHMP increased. To investigate the reaction process and mechanism, the ethanol‐washed product was characterized using XRD, SEM/EDS and TEM/SAED. The results demonstrate that ACC and calcite were concomitant during the milling process, and ACC transformed into vaterite during subsequent water washing.

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“…Moreover, nano-calcium carbonate has low cost with respect to other nanoparticles, low aspect ratio and high surface area [4]. They are commonly used as filler, extender or pigment for paper, paint, rubber, and plastics in various industries [5,6]. Their introduction into polymer matrix by a small amount (less than 5 wt%) can enhance the composite's properties depending on the nanoparticle's shape, particle and aggregate size, surface characteristics and degree of dispersion [4,7].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical microstructure of nanoparticles of calcium carbonate/epoxy composites: Thermomechanical and surface properties

Miranda¹,

Silva²

2020

Express Polym. Lett.

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Calcium carbonate nanoparticles of calcite structure and nanometric size were successfully synthesized by mechanochemical processing using low energy mill (100 rpm). Transmission electron micrographs demonstrated that the nanoparticles tend to form agglomerates of approximately 1 μm due to their high surface energy. A study of structure and properties of composite materials resulting from the addition of CaCO 3 nanoparticles at concentrations of 1, 2.5 and 5 wt% to epoxy resin was made. Epoxy/1 wt% CaCO 3 and epoxy/2.5 wt% CaCO 3 composites displayed an increase of 8 and 12°C in glass transition temperature (T g ), respectively. Scanning electron microscopy images of composites revealed a hierarchical structure of micrometric sized extended aggregates of nanometric calcium carbonate particles homogeneously distributed in the polymer matrix. This morphology explains the increase in hydrophobicity, as well as gains in Young's moduli, which were greater than 59% with respect to the neat epoxy as measured by Nanoindentation. Therefore, this work demonstrates that the optimum range of concentration up to 2.5 wt% of high-quality nano CaCO 3 guarantees thermal, mechanical and surface significant improvements associated with a hierarchical microstructure-nanostructure, which ultimately extend the possibilities of application of epoxy materials for nowadays challenges.

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One-step facile synthesis of CaCO3 nanoparticles via mechano-chemical route

Cited by 29 publications

References 15 publications

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

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

The mechanochemical route of vaterite synthesis using sodium hexametaphosphate as an inorganic additive

Hierarchical microstructure of nanoparticles of calcium carbonate/epoxy composites: Thermomechanical and surface properties

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