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Biomimetic mintralization in situ preparation method of functional nanometer calcium carbonate

A nano-calcium carbonate and biomimetic mineralization technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of complex process flow, long reaction period and high cost, and achieve the effect of simplified process, short reaction time and low cost

Inactive Publication Date: 2006-06-28
CHANGCHUN DALI NANO TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the original technology (nano-scale active calcium carbonate, 02110801.3, the Intellectual Property Office of the People's Republic of China, October 23, 2002; a production method of active calcium carbonate, 94115875.6, the Patent Office of the People's Republic of China, June 28, 1995 Japan), the preparation of active nano-calcium carbonate is to post-treat nano-calcium carbonate and carry out surface modification. The process is complicated, the reaction cycle is long, the energy consumption is large, and the cost is high.

Method used

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  • Biomimetic mintralization in situ preparation method of functional nanometer calcium carbonate
  • Biomimetic mintralization in situ preparation method of functional nanometer calcium carbonate
  • Biomimetic mintralization in situ preparation method of functional nanometer calcium carbonate

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Experimental program
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Effect test

Embodiment 1

[0022] Dissolve 2g of stearyl alcohol in 1L of water, add 1L of calcium hydroxide emulsion with a mass ratio of calcium oxide to water of 0.1:1 at room temperature (25°C), and transfer the emulsion to a bubbling carbonization device after aging for 0.5 hours In the process, a mixed gas of carbon dioxide and nitrogen containing 33% carbon dioxide is introduced at a rate of 30ml / min to carry out the carbonization reaction. When the pH value of the slurry drops to 7, the carbonization is stopped, the emulsion is dehydrated, and the active nanometer is obtained after drying at 120°C. calcium carbonate. Observed under a transmission electron microscope, the calcium carbonate particles are well dispersed, the shape is spindle-shaped, the diameter is 40nm, the diameter-to-length ratio is 1:5, and the activation rate is 99%.

Embodiment 2

[0024] 2g octadecyl unsaturated alcohol is dissolved in 1L water, and other conditions are as embodiment 1, finally obtains active nanometer calcium carbonate, observes under transmission electron microscope, calcium carbonate particle dispersibility is better, and shape is spindle shape, and diameter is 38nm, The aspect ratio is 1:5, and the activation rate is 90%.

Embodiment 3

[0026] The mass ratio of calcium oxide and water is 0.05: 1, and other conditions are as embodiment 1, finally obtains active nano-calcium carbonate, observes under transmission electron microscope, and calcium carbonate particle dispersibility is better, and shape is spindle-shaped, and diameter is 35nm, diameter The length ratio is 1:5, and the activation rate is 90%.

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Abstract

A process for in-situ preparing functional nano-calcium carbonate by bionic mineralizing includes such steps as proportionally mixing the calcium oxide, organic matrix or its solution and calcium hydroxide emulsion, ageing, introducing the mixture of CO2 and air, carbonizing, dewatering, and drying at 80-120 deg.C.

Description

technical field [0001] The invention relates to a new method for preparing functional nano calcium carbonate, in particular to a method for preparing functional nano calcium carbonate in situ by simulating biomineralization. Background technique [0002] Biomineralization refers to the process of forming minerals in organisms, and its role is an extensive and complex physical and chemical process between solid-liquid phases, organic matter and inorganic matter. A small amount of organic matter is used as a template to carry out molecular operations and highly orderly combination into inorganic materials. The organic matrix can be used as an inert substrate for structural support or a limited space for mineral precipitation and the surface of nucleation to determine the shape, size, and size of mineral points. Spatial arrangement, crystallographic orientation and homogeneous polycrystalline type, and together with biological crystals determine the mechanical properties of bio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18
Inventor 王子忱王成毓赵敬哲邓艳辉郭玉鹏
Owner CHANGCHUN DALI NANO TECH DEV