Preparation method of calcium carbonate with layered structure

Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a preparation method of calcium carbonate with a layered structure. The preparation method comprises the following steps: firstly, self-assembling amphiphilic block copolymers in a selective solvent to form flexible polymer nano-wires with core-shell structures; secondly, carrying out hydrophobic core crosslinking on the nano-wires to obtain nano-wires which can stably exist in a solution; and thirdly, crystalizing calcium carbonate in a mixed solution of the flexible polymer nano-wires and calcium chloride at the atmosphere of carbon dioxide to form a layer-by-layer stacked structure. The layered calcium carbonate structure prepared by the method is quite close to a natural shell structure, the crystal form is single and orderly, a preparation process is simple, and an efficient method is provided for artificial preparation of the calcium carbonate.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and in particular relates to a preparation method of calcium carbonate with a layered structure. Background technique [0002] New materials and new shapes have always been hot research topics in science and technology circles, providing directions and methods for solving many major problems. Among them, inorganic materials are an important branch in the field of material research, and have good application prospects in the fields of catalysis, electrochemistry, coatings, and biomedicine. At present, the preparation of inorganic materials by biomineralization has attracted much attention. The natural world is filled with many unique biomineralized materials, such as shells with strong mechanical properties, pearls with beautiful colors, and hard human bones and teeth. The artificial preparation of biomineralized materials is an emerging interdisciplinary subject, which can link chemistry, biology,...

AI Technical Summary

Problems solved by technology

In the existing research on the preparation of layered calcium carbonate, most of them are regulated by macromolecular polymers (J. Am. Chem. Soc. 2002, 124, 9700-9701), or by natural biological protein filaments (CrystEngComm , 2013, 15, 5179–5188), however, none of these can obtain a regular layered structure, and even if a layered structure is obtained, it is not a good single crystal structure, which limits its further application

In addition, there are also calcium carbonate structures grown in templates, such as in gels, but layered structures cannot be obtained (Adv. Mater.2009, 21, 470–473), or polymer frameworks as templates, which can be obtained Blocky layered structure, but this is an artificial framework that does not conform to natural growth, and the preparation time is long and the process is cumbersome (Science.2016, 354, 107-110)

Images