Nano calcium carbonate particles have a wide range of industrial applications due to their beneficial properties such as high porosity and high surface area to volume ratio and due to their strengthening the mechanical properties of plastics and paper. Consequently, significant research has been done to deliver a new approach for the …
Synthesis of calcium carbonate particles with carboxylic-terminated hyperbranched poly (amidoamine) and their surface modification
Calcium carbonate (CaCO3) is an important inorganic mineral in biological and geological systems. Traditionally, it is widely used in plastics, papermaking, ink, building materials, textiles, cosmetics, and food. Over the last decade, there has been rapid development in …
Contemporary studies of self-healing polymer composites are based on microcapsules synthesized using synthetic and toxic polymers, biopolymers, etc. via methods such as in situ polymerization, …
Abstract A novel, low cost technique that can be used for bulk production of calcium carbonate nanoparticles for possible use in industry, agriculture and medicine is described in the present paper. Calcium carbonate nanoparticles were synthesized by thermolysis of precursor molecule calcium oxalate and characterized by particle size analysis, zeta …
calcium carbonate (CaCO3), chemical compound consisting of one atom of calcium, one of carbon, and three of oxygen that is the major constituent of limestone, marble, chalk, eggshells, bivalve shells, and corals. Calcium carbonate is either a white powder or a colorless crystal. When heated, it produces carbon dioxide and calcium …
Porous calcium carbonate microspheres (PCMs), fabricated through a facile coprecipitation method regulated by soluble starch (SS), were used as carrier for prometryn (PMT), a typical herbicide, to prepare slow-release PMT. Under thermal treatment, SS molecules self-organized into nanoaggregates that bind Ca2+ through chelation and …
Calcium carbonate (CaCO3) is the most widely used filler material in paper, paint, plastic, food, ceramic, cosmetic, medicine and other industries.
A photo-on-demand in situ synthesis of chloroformates of primary alkyl alcohols in the presence of CHCl 3 and oxygen followed by addition of alcohols or amines enables a one-pot synthesis of carbonates and carbamates, respectively. F. Liang, M. Yanai, Y. Suzuki, A. Tsuda, Org. Lett., 2020, 22, 3566-3569. Carbon tetrabromide catalyzes O - tert ...
The limestones was abundant in Tuban, East Java and have high calcium mineral content. Nevertheless, in the economic value, limestone have low price. Aim the research is prepare Precipitated Calcium Carbonate (PCC) by caustic soda method. In this method, calcium was dissolved in HNO 3 with different concentration (2, 4,6, 8 M). The …
Cementation in construction materials primarily relies on the aqueous precipitation of minerals such as carbonates and silicates. The kinetics of nucleation and growth play a …
Calcium carbonate (CaCO 3) is an important inorganic mineral in biological and geological systems. Traditionally, it is widely used in plastics, papermaking, ink, building materials, textiles, cosmetics, and food. Over the last decade, there has been rapid development in the controlled synthesis and surface modification of CaCO 3, the ...
Using three different amino acids (AAs) as organic matrices, including the highly nonpolar hydrophobic l-valine, the positively charged l-arginine and the less polar uncharged l-serine, calcium carbonate (CaCO3) with different morphologies and polymorphs were synthesized by a facile gas diffusion reaction based on biomimetic …
The addition of ethylene glycol mainly achieves the controllable synthesis of the CaCO 3 by regulating the mass fraction of aragonite and calcite in the CaCO 3 sample to acquire the rod bundles.
Calcium carbonate (CaCO3) is the most widely used filler material in paper, paint, plastic, food, ceramic, cosmetic, medicine and other industries.
The production of precipitated calcium carbonate (PCC) using sucrose solution with Brix reading of 11 is presented in this study. A low grade carbide lime obtained from industrial waste as raw ...
The synthetic conditions of amorphous calcium carbonate such as initial concentration of reactant, temperature and pH in the reaction of CaCl2-Na2CO3-NaOH system, and its crystallization in water and NH4Cl solution were investigated. Characteristics of the amorphous phase were determined by means of X-ray diffraction, …
Usually, the metastable vaterite phase transforms to the thermodynamically most stable calcite phase. We report here the phase transformation of vaterite to aragonite, which is seldom observed in the synthetic processes of calcium carbonate. The vaterite, upon equilibration with distilled water at room temperature, gradually transforms to …
Semantic Scholar extracted view of "Controlled synthesis of crystalline calcium carbonate aggregates with unusual morphologies involving the phase transformation from amorphous calcium carbonate" by H. Tang et al.
Calcium carbonate dendrites with novel leaf- and snowflake-like morphology were synthesized with the combination of two different functional additives. They show fascinating heterogeneous domains made up of internal calcite scaffolding, aragonite shell and external amorphous calcium carbonate coating.
A carbonation process to control the specific surface area of mesoporous calcium carbonate and the dissolution profile of ferulic acid on mesoporous carbonate particles are presented. The effects of water content on the physicochemical properties, specific surface area, pore size, crystallinity, and morphology are
Calcium carbonate nano and micro-particles have a large number of industrial applications due to their beneficial properties such as high porosity, high surface area to …
Calcium carbonate (CaCO 3) was synthesized from diverse water-free alcohol solutions, resulting in the formation of vaterite and calcite precipitates, or stable particle suspensions, with the dimensions and morphologies depending upon the conditions used. The obtained results shed light on the importance of solvation during crystallization …
Calcium Carbonate (CaCO3)[Limestone] - Calcium carbonate is one of the most abundant materials present in nature with the chemical formula CaCO3. Calcium carbonate also called limestone is an example of a metal carbonate used in …
This review highlights different approaches of the synthesis of calcium carbonate micro- and nanoparticles, such as precipitation, slow carbonation, emulsion, polymer-mediated method, including in-situ polymerization, mechano-chemical, microwave-assisted method, and biological methods. The applications of these versatile calcium …
Calcium carbonate (CaCO3) is an important inorganic mineral in biological and geological systems. Traditionally, it is widely used in plastics, papermaking, ink, building materials, textiles ...
Study with Quizlet and memorize flashcards containing terms like order the steps required to predict the volume (in mL) of 0.100 M calcium chloride needed to produce 1.00 g of calcium carbonate. There is an excess of sodium carbonate., calculate the volume (in mL) of 0.100 M CaCl2 needed to produce 1.00 g of CaCO3(s), lab data and …
Precipitated Calcium Carbonate (PCC) is a widely studied material. The versatility and design of CaCO 3 particles have aroused considerable interest in both the scientist and …
The calcium carbonate synthesis process started by mixing between 0.5 M Na 2 CO 3 and 0.5 M Ca (NO 3) 2 .4H 2 O solutions. The solution was mixed continuously at a temperature of 27 °C (T = 300 K), with the fixed stirring speed at 800 rpm with different reaction times (5, 10, 15, and 30 min).
A carbonation process to control the specific surface area of mesoporous calcium carbonate and the dissolution profile of ferulic acid on mesoporous carbonate particles are presented. The effects of water content on …
The valorization of the LD-slag process was conducted in a CO 2 atmosphere by varying the temperature over 25–55 °C. The highest calcium oxide conversion was found at 55 °C. Various techniques were employed in order to assess the crystal growth, textural properties, and thermal behavior of the synthetic CaCO 3 formed.
Carefully designed micro- and nanocarriers can provide significant advantages over conventional macroscopic counterparts in drug delivery applications. For the successful delivery of bioactive compounds, carriers should possess a high loading capacity, triggered release mechanisms, biocompatibility, and biodegradability. Porous calcium carbonate …
The indirect synthesis of calcium carbonate from the industrial by-product gypsum has received substantial attention as a viable method for resource utilization. Currently, the …
Crystallization of calcium carbonate mineral with hierarchical structures in DMF solution under control of poly (ethylene glycol)-b-poly (l-glutamic acid): effects of crystallization temperature and polymer concentration
The valorization of the LD-slag process was conducted in a CO 2 atmosphere by varying the temperature over 25–55 °C. The highest calcium oxide conversion was found at 55 …
Here, we study both the particles formation and biological applicability of CaCO3. In particular, anisotropic differently shaped CaCO3 particles were synthesized using green sustainable approach based on co-precipitation of calcium chloride and sodium carbonate/bicarbonate at different ratios in the presence of organic additives.
Calcium carbonate is a common natural mineral with a wide range of applications. In this study, hollow calcite microspheres were successfully synthesized by using calcium chloride and sodium carbonate as raw materials in an SDS–PEG system. The results suggested that the appropriate concentration of SDS is necessary during the …
