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Open AccessArticle

Fracture Strength Evaluation of Agglomerates of Fatty Acid-Coated CaCO3 Nanoparticles by Nano-Indentation

Shiraishi Central Laboratories Co. Ltd., 4-78, Amagasaki 660-0085, Japan
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ChemEngineering 2019, 3(3), 73; https://doi.org/10.3390/chemengineering3030073
Received: 15 June 2019 / Revised: 6 August 2019 / Accepted: 8 August 2019 / Published: 9 August 2019
Nanoparticles often form agglomerates during their manufacturing process. When nanoparticles form agglomerates, their inherent properties cannot be fully exploited. In this study, we attempted to establish a conventional method to evaluate the fracture strength of agglomerates into smaller parts. We used a commercially available nano-indentation instrument with a flat indenter tip. We chose calcium carbonate nanoparticles with stearic acid coatings as model materials. It was found that the more fatty acid that is coated on the particle surface, the stronger the agglomerates become. The technique we propose in this study can be used to rapidly evaluate the fracture strength of nanoparticle agglomerates. View Full-Text
Keywords: calcium carbonate; nanomaterials; surface treatment; micromechanical properties; fracture toughness calcium carbonate; nanomaterials; surface treatment; micromechanical properties; fracture toughness
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MDPI and ACS Style

Kezuka, Y.; Tajika, M. Fracture Strength Evaluation of Agglomerates of Fatty Acid-Coated CaCO3 Nanoparticles by Nano-Indentation. ChemEngineering 2019, 3, 73.

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