— Corrosion-related damage incurs significant capital costs in many industries. In this study, an anti-corrosive pigment was synthesized by modifying calcium carbonate with sodium alginate (SA), and smart self …
— A series of experimental precipitated calcium carbonates (PCCs) coated with commercial stearic acid (stearin), with the coating amount of stearin added to the PCC particles ranging from 3 to 13.5 ...
— DOI: 10.1016/j.jma.2022.11.022 Corpus ID: 258443517; Corrosion resistance of a calcium carbonate coating prepared by ultrasound-assisted chemical conversion in calcium disodium edetate solution
— A calcium carbonate (CaCO 3)-based coating with gamma-C 2 S (γ-C 2 S) as the main carbonatable binder is proposed to protect the metal substrate against …
A large range of fillers and coating pigments for best whiteness, printability and cost-effective fiber substitution. We offer a wide range of carbonate products that differ in particle size, particle size distribution and brightness to suit all paper and board application needs.. Ground Calcium Carbonate (GCC) is composed of the crystalline mineral calcite, which …
— A calcium carbonate (CaCO3)-based coating with gamma-C2S (γ-C2S) as the main carbonatable binder is proposed to protect the metal substrate against corrosion in this paper. Here, the morphology and phase assemblage of the coatings are studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the corrosion …
— Calcium carbonate, which is widely employed as a filler added into the polymer matrix, has large numbers of applications owing to the excellent properties such as low cost, non-toxicity, high natural reserves and biocompatibility. Nevertheless, in order to obtain the good filling effect, calcium carbonate needs to be surface modified by organic …
— The optical properties of pigments used for paper coating are linked to their morphology. The light scattering through coated layers depends upon the size and the size distribution of the pigments and their packing behavior. In this report the effect of particle packing of various calcium carbonate pigments on the whiteness of the final coated …
Calcium carbonate for protective coatings. More than fillers, Omya offers an extensive range of standard and specialty grades of Calcium Carbonate with different particle sizes and optical values. Filler selection can …
— Modification of calcium carbonate particles with surfactant significantly improves the properties of the calcium carbonate coating on paper. In this study, unmodified and CTAB (hexadecyltetramethylammonium bromide)- and oleate-modified calcium carbonate nanoparticles were prepared using the wet carbonation technique for paper …
— A two-step coating method for preparing ground calcium carbonate-based TiO 2 pigment (GCTD) was proposed and studied in this paper. The tetraethoxysilane (TEOS, C 8 H 20 O 4 Si) was selected as Si source. Aqueous ammonia was used as precipitant in the first coating step while titanyl sulfate (TiOSO 4 ·2H 2 O) was used as Ti source in the ...
— A high-magnification micrograph (Fig. 1 b) shows that the coating primarily consisted of spherical vaterite crystals, which were wrapped by interconnected thin membrane-like RGO films. In contrast, the CaCO 3 coating without RGO had a predominance of rhombohedral CaCO 3 crystals with occasional presence of vaterite …
— Nature builds numerous structurally complex composites with fascinating mechanical robustness and functionalities by harnessing biopolymers and amorphous calcium carbonate (ACC). The key to successfully mimicking these natural designs is efficiently stabilizing ACC, but developing highly efficient, biodegradable, biocompatible, …
— with vaterite calcium carbonate coating had a porosity of 5.55% and an average pore size. Coatings 2021, 11, 1534 11 of 17. of 1184.16 nm. The experimental results showed that the porosity of ...
— Calcium carbonate precipitation is a rather straightforward chemical process governed mainly by four key factors ... methods of removing PCBs include solvent washing, hydroblasting, or sandblasting followed by encapsulation in epoxy coating. But all these treatments are quite inconvenient and ineffective due to resurfacing of the oil over time ...
Ground calcium carbonate can be made from limestone, chalk, and marble; about three-quarters of the ground calcium carbonate worldwide is made from marble. Ground calcium carbonate is used as a coating pigment for paper because of its high brightness and as a paper filler because it strengthens the sheet and imparts high brightness.
— A CaCO 3 coating with good anticorrosion and adhesion performance was fabricated via ultrasound-assisted chemical conversion on AZ41 magnesium alloy, with a water-bath treated coating as a control. The coating formed on AZ41 mainly consists of …
— The carbonated calcium carbonate-based coating has superior resistance of anti-UV aging degradation, and salt spray erosion due to the high cross linked calcium carbonate crystal and the filling …
This system is most commonly used for coating calcium carbonate with stearic acid to meet the requirements for fillers used in the plastics industry. The EPIC's proprietary injector design achieves a high degree of atomization of the coating fluid, while the high tip speeds produced by the counter-rotating pin disks provide the high shear ...
— However, the improvement of corrosion resistance of calcium phosphorus coatings prepared by chemical conversion method is not very significant, and even decreases in some cases. For example, Wu et al. [18] fabricated a MAO/Ca/P coating on AZ31 Mg, although the corrosion potential enhanced compared the neat MAO coating, …
The aim of this work is to shed some light upon the structure of the fatty acid coating of calcium carbonate particles prepared in aqueous medium, which is definitely the most used industrial process. A series of experimental PCC nanoparticles coated with commercial stearic acid in aqueous medium were investigated. The surface characterization ...
Calcium carbonate (CaCO 3) is a substance widely used for various purposes, for example, as a filler and pigment material not only in paper, plastics, rubbers, paints, and inks but also in pharmaceutics, cosmetics, construction materials, and asphalts and as a nutritional supplement in animal foods (1).Besides the so-called ground calcium carbonate (GCC), …
— A lignosulfonate-attapulgite@CaCO 3 coating was fabricated on nylon filter mesh.. The prepared mesh achieved underwater superoleophobicity compared to raw mesh. • The environmentally compatible materials (attapulgite@CaCO 3) are used in coating materials.. The mesh has good resistance to acid, base, and salt solution and …
— The current high global demand for high-quality paper, paint, adhesive/sealant, and plastic, filler industries cannot survive without unique and high-quality precipitated calcium carbonate (PCC). They are used as fillers, additives, and reinforcements. PCC is a key constituent of the modern paper and plastic industry. This …
— CaCO 3 particles dispersed in liquid media have proven to be good inductors of hydroxyapatite (HAp) growth. However, the use of CaCO 3 deposited as thin films for this propose is unknown. Here, we report the growth of CaCO 3 continuous films on Langmuir–Blodgett (LB) modified titanium surfaces and its use as HAp growth inductor. …
— The purpose of this work was to use different surfactants to deposit different crystalline calcium carbonate films on the surface of sandstone through a simple double displacement reaction. This was done to test the protective effects of calcium carbonate coatings based on water absorption, moisture permeability and weather resistance. …
— The presence of the CaCO 3 film as pre-coating diminished the time necessary to growth continuous and homogeneous HAp films using a biomimetic approach. These coatings exihibit high wettability and γ s related to their roughness and composition. The coated Ti surfaces are not toxic for osteoblasts and the presence of HAp on the top …
— Seed coating is a mechanism of providing plant growth promoting substances with seeds to improve seed quality (Rocha et al., 2019a, Rocha et al., 2019b).Evolution of seed coating dated back from those which perform a wide range of seed treatments with the objectives of which include the protection to different kind of insect pests, fungal strains, …
— We have studied nucleation and crystal growth of calcium carbonate on hard surfaces, i.e. stainless steel and silica, at different temperatures, in relation to the corresponding bulk processes, using scanning electron microscopy (SEM), X-ray diffraction (XRD), and ellipsometry. In the bulk solution, a mixture of all three calcium carbonate …
