Preparation and characterization of calcium carbonate–titanium dioxide core–shell (CaCO3@TiO2) nanoparticles and application in the papermaking industry

Tan, Hong; He, Yangyang; Zhao, Xu

doi:10.1016/j.powtec.2015.05.039

Cited by 39 publications

(28 citation statements)

References 35 publications

(34 reference statements)

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“…CaCO 3 -TiO 2 composite particles exhibited less light absorption in the wavelength range of 200–350 nm than TiO 2 . Unlike CaCO 3 , the CaCO 3 -TiO 2 composite particles obtained the same light absorption property as that of TiO 2 and the result was in agreement with the previous report [5]. The abovementioned results not only indicated that the CaCO 3 -TiO 2 composite particles obtained excellent UV resistance stability, but also reflected the mechanism that TiO 2 particles coated on the surface of CaCO 3 particles endowed the composite particles with the similar properties of TiO 2 .…”

Section: Resultssupporting

confidence: 91%

“…Therefore, CaCO 3 has become the most widely used filler in many industrial products such as plastic, paint, and paper due to its obvious cost advantage compared to most non-metallic minerals [3,4]. In order to further increase the utilization value of CaCO 3 and achieve the efficient utilization of mineral resources, it is necessary to develop CaCO 3 -based composite with oxides, such as TiO 2 [5,6]. Recently, the composite pigment prepared by coating TiO 2 particles on the surface of CaCO 3 particles, had received wide attention [7].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of CaCO3-TiO2 Composite Particles and Their Pigment Properties

2018

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CaCO3-TiO2 composite particles were prepared with calcium carbonate (CaCO3) and TiO2 in stirred mill according the wet grinding method. The pigment properties, morphology, and structure of CaCO3-TiO2 composite particles and the interaction behaviors between CaCO3 and TiO2 particles were explored. In the CaCO3-TiO2 composite particles, TiO2 is uniformly coated on the surface of CaCO3 and the firm combination between CaCO3 and TiO2 particles is induced by the dehydration reaction of surface hydroxyl groups. CaCO3-TiO2 composite particles have similar pigment properties to pure TiO2. The hiding power, oil absorption, whiteness and ultraviolet light absorption of composite particles are close to those of pure TiO2. The application performance of CaCO3-TiO2 composite particles in the paint is consonant with their pigment properties. The contrast ratio of the exterior paint containing CaCO3-TiO2 composite particles is equivalent to that of the paint containing the same proportion of pure TiO2.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Preparation of CaCO3-TiO2 Composite Particles and Their Pigment Properties

2018

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“…The preparation of composite pigments by uniformly coating TiO 2 on the surface of CaCO 3 particles is an important and efficient utilization of CaCO 3 mineral resources. Therefore, the related preparation processes have attracted wide attention [3,4]. Meanwhile, the preparation of the composite pigments can improve the utilization rate of pigment TiO 2 and reduce the consumption of expensive TiO 2 [5,6].…”

Section: Introductionmentioning

confidence: 99%

Surface Organic Modification of CaCO3-TiO2 Composite Pigment

et al. 2019

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To improve the properties and dispersibility of CaCO3-TiO2 composite pigments (CaCO3-TiO2) in organic matrices, the surface modification of CaCO3-TiO2 was performed with sodium stearate (SS) as an organic modifier by wet ultra-fine grinding in a stirred mill. The pigment properties of modified CaCO3-TiO2 and its dispersibility in organic media were tested and characterized. The binding mechanism between CaCO3-TiO2 and SS was explored by infrared spectrometry (IR) and X-ray photoelectron energy spectroscopy (XPS). The results showed that the mechanical grinding strength and SS dosage had a significant effect on the activation index and sedimentation rate of CaCO3-TiO2. After surface modification, the surface of CaCO3-TiO2 turned from a hydrophilic surface to a hydrophobic surface and the surface free energy was reduced. In addition, the hiding property and dispersibility of CaCO3-TiO2 in the organic medium were significantly improved. IR and XPS results indicated that the modifier SS was adsorbed on the surface of CaCO3-TiO2 by chemical combination.

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“…The measurements were performed using a laser wavelength of 660 nm at 25°C. At this wavelength, the refractive index and the UV absorbance value of calcium carbonate are 1.6543 and 0, respectively [18][19][20].…”

Section: Characterization Of Caco 3 Nanoparticlesmentioning

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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Preparation and characterization of calcium carbonate–titanium dioxide core–shell (CaCO3@TiO2) nanoparticles and application in the papermaking industry

Cited by 39 publications

References 35 publications

Preparation of CaCO3-TiO2 Composite Particles and Their Pigment Properties

Preparation of CaCO3-TiO2 Composite Particles and Their Pigment Properties

Surface Organic Modification of CaCO3-TiO2 Composite Pigment

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

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