Study on preparation and structure of chrysanthemum‐shaped micron calcium carbonate based on inverse microemulsion

Zhao, Tiaobin; Xu, Chao; Ma, Yi-Tong; Yan, Zeng; Wang, Nong

doi:10.1049/mnl.2020.0349

Cited by 5 publications

(2 citation statements)

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“…Thermogravimetry can be used to test the thermal stability of materials [ 62 , 63 ]. The TGA curves comparison between cubic calcium carbonate, spherical calcium carbonate and the composite material are shown in Figure 6 .…”

Section: Resultsmentioning

confidence: 99%

“…The second weight loss between 610 °C and 790 °C is due to undecomposed, so the weight loss rate is only about 34.8~35.7%. Thermogravimetry can be used to test the thermal stability of materials [62,63]. The TGA curves comparison between cubic calcium carbonate, spherical calcium carbonate and the composite material are shown in Figure 6.…”

Section: Structure and Crystal Typementioning

confidence: 99%

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Calcium Carbonate@silica Composite with Superhydrophobic Properties

Tian

Bounmyxay

et al. 2021

Molecules

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In this paper, spherical calcium carbonate particles were prepared by using CaCl2 aqueous solution + NH3·H2O + polyoxyethylene octyl phenol ether-10 (OP-10) + n-butyl alcohol + cyclohexane inverse micro emulsion system. Then, nanoscale spherical silica was deposited on the surface of micron calcium carbonate by Stöber method to form the composite material. Scanning electron microscope (SEM), X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS) were used to characterize the morphology and structure of the composite material. It is found that the surface of the composite material has a micro-nano complex structure similar to the surface of a “lotus leaf”, making the composite material show hydrophobicity. The contact angle of the cubic calcium carbonate, spherical calcium carbonate and CaCO3@SiO2 composite material were measured. They were 51.6°, 73.5°, and 76.8°, respectively. After modification with stearic acid, the contact angle of cubic and spherical CaCO3 were 127.1° and 136.1°, respectively, while the contact angle of CaCO3@SiO2 composite was 151.3°. These results showed that CaCO3@SiO2 composite had good superhydrophobicity, and the influence of material roughness on its hydrophobicity was investigated using the Cassie model theory.

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Section: Resultsmentioning

confidence: 99%

Section: Structure and Crystal Typementioning

confidence: 99%