Synthesis of dispersed CaCO3 nanoparticles by the ultrafine grinding

Cho, Kuk; Chang, Hyunju; Kil, Dae Sup; Kim, Byoung‐Gyu; Jang, Hee Dong

doi:10.1016/j.jiec.2008.10.005

Cited by 22 publications

(15 citation statements)

References 9 publications

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“…This clearly reflects the effectiveness of the dispersant in reducing the size by preventing aggregation of particles. Similar observation was reported [21] for CaCO 3 grinding to nanosized particles. It was reported [21] that the size reduction was caused between 15-30 min of grinding, thereafter, due to agglomeration mean size increases in absence of surfactant.…”

Section: Effects Of Ph and Dispersant On Wet Grinding Of Barium Sulfatesupporting

confidence: 89%

Effects of operating parameters on the production of barium sulfate nanoparticles in stirred media mill

Patel

Murthy

Chakraborty

2012

Journal of Industrial and Engineering Chemistry

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Section: Effects Of Ph and Dispersant On Wet Grinding Of Barium Sulfatesupporting

confidence: 89%

Effects of operating parameters on the production of barium sulfate nanoparticles in stirred media mill

Patel

Murthy

Chakraborty

2012

Journal of Industrial and Engineering Chemistry

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“…According to the Derjaguin, Landau, Verwey, and Overbeek (DLVO) theory, interaction between nanoparticles in an aqueous dispersion is characterized by two opposite interactions: van der Waals attraction and electrostatic repulsion. , The electrostatic repulsive interaction can be controlled by adding ionic dispersant. In this study, anionic dispersant “PAANa” was chosen for its exceptional dispersion stability for calcium carbonate. , Cationic surfactants were not chosen as they have been found to flocculate calcium carbonate . The adsorption mechanism of PAANa onto ESNP involves dissolution of sodium in water and attachment of a negative hairy layer of acrylate ion (PAA – ) onto the surface of ESNP (Ca + ) .…”

Section: Resultsmentioning

confidence: 99%

“…In this study, anionic dispersant 'PAANa' was chosen for its exceptional dispersion stability for calcium carbonate 32,33. Cationic surfactant was not chosen as they have been found to flocculate calcium carbonate.…”

mentioning

confidence: 99%

Bioderived “Green” Composite from Soy Protein and Eggshell Nanopowder

Rahman

Netravali

Tiimob

et al. 2014

ACS Sustainable Chem. Eng.

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A bio-derived and eco-friendly hybrid nanocomposite was developed from soy protein and eggshell nanopowder (ESNP). ESNP was synthesized via size reduction of chicken eggshells using ball milling followed by sonochemical process. Transmission electron microscopy and X-ray diffraction (XRD) studies revealed calcite particles in ESNP with size ranging between 20 and 40 nm. A trace of protein with as-synthesized ESNP was detected through X-ray photon spectroscopy (XPS) observation. Dispersion of ESNP in water was achieved by using a poly-anionic dispersant via adsorption mechanism. Green nanocomposites were developed from soy protein isolate (SPI) and dispersed ESNP using glycerol, a natural plasticizer, by solution casting process. Significant improvements in Young's modulus, tensile strength and thermal stability of SPI nanocomposite sheets were achieved as a result of incorporation of well-dispersed ESNP. The developed ESNP-incorporated SPI nanocomposite would be inexpensive and useful to fabricate sustainable 'green' composite structures.

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“…Nandhini et al produced nanocarbon with sizes ranging from 80 to 500 nm from graphite using sodium dodecyl sulphate/sodium dodecyl benzene sulfonate as surfactant in a high energy ball milling process [ 97 ]. Calcium carbonate particles of about 40 nm size could be obtained from a one-step grinding process, showing enhanced dispersion and grinding of particles when poly(acrylic acid, sodium salt) was used as surfactant [ 98 ]. Therefore, high energy ball milling can be applied for the production of various nanopowders that show good properties for the utilization in nanocomposites [ 99 ].…”

Section: Processingmentioning

confidence: 99%

Review on the Processing and Properties of Polymer Nanocomposites and Nanocoatings and Their Applications in the Packaging, Automotive and Solar Energy Fields

et al. 2017

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For the last decades, nanocomposites materials have been widely studied in the scientific literature as they provide substantial properties enhancements, even at low nanoparticles content. Their performance depends on a number of parameters but the nanoparticles dispersion and distribution state remains the key challenge in order to obtain the full nanocomposites’ potential in terms of, e.g., flame retardance, mechanical, barrier and thermal properties, etc., that would allow extending their use in the industry. While the amount of existing research and indeed review papers regarding the formulation of nanocomposites is already significant, after listing the most common applications, this review focuses more in-depth on the properties and materials of relevance in three target sectors: packaging, solar energy and automotive. In terms of advances in the processing of nanocomposites, this review discusses various enhancement technologies such as the use of ultrasounds for in-process nanoparticles dispersion. In the case of nanocoatings, it describes the different conventionally used processes as well as nanoparticles deposition by electro-hydrodynamic processing. All in all, this review gives the basics both in terms of composition and of processing aspects to reach optimal properties for using nanocomposites in the selected applications. As an outlook, up-to-date nanosafety issues are discussed.

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Synthesis of dispersed CaCO3 nanoparticles by the ultrafine grinding

Cited by 22 publications

References 9 publications

Effects of operating parameters on the production of barium sulfate nanoparticles in stirred media mill

Effects of operating parameters on the production of barium sulfate nanoparticles in stirred media mill

Bioderived “Green” Composite from Soy Protein and Eggshell Nanopowder

Review on the Processing and Properties of Polymer Nanocomposites and Nanocoatings and Their Applications in the Packaging, Automotive and Solar Energy Fields

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