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Processing technique for natural biological calcium carbonate powder filler

A technology of calcium carbonate micropowder and bio-calcium carbonate, applied in fibrous fillers, inorganic pigment treatment, chemical instruments and methods, etc., can solve the pollution of shells and egg shells, the surface inhomogeneity and strong polarity of natural shell microcrystals, etc. problems, to achieve the effect of improving mechanical properties and thermal properties, maintaining inhomogeneity, and pure hue

Inactive Publication Date: 2008-07-30
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a processing technology for natural biological calcium carbonate micropowder filler, the present invention has the ability to keep the aragonite crystal form in natural shells to the greatest extent, and also maintains the inhomogeneity of the microcrystalline surface of natural shells to the greatest extent And strong polarity, so that the shell powder has a developed microporous structure; as a filler, it can significantly improve the mechanical and thermal properties of polymer materials, and at the same time solve the pollution problems caused by shells and egg shells.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In this embodiment, snail shells are selected as the material. First, the snail shells are pretreated by washing, drying, and coarse grinding, and then the pretreated snail shells are crushed and graded to obtain snail shell fillers <38 μm. Roast at about 350°C for 9 hours in a Mafu furnace, put the burned snail shell powder into a desiccator while it is hot, and let it cool down to obtain a snail shell powder filler of <5 μm. By the plastics filled with the snail shell micropowder filler after the method of the present invention is processed and by sodium hydroxide, the plastic filled with the snail shell micropowder filler after the oxidant processing technology is processed and to the plastic (blank sample) that does not contain calcium carbonate micropowder filler For performance test comparison, the above three treated plastics were prepared into a suspension with acetone at a ratio of 1:2. Wherein by the plastics filled with the snail shell micropowder filler afte...

Embodiment 2

[0014] In this example, pearl shells are selected as the material. First, the pearl shells are pretreated by washing, drying, and coarse grinding, and then the pretreated pearl shells are crushed and classified to obtain pearl shell fillers <38 μm. Roasting at about ℃ for 5 hours, put the fired pearl shell powder into a desiccator to cool under heat, and obtain the pearl shell powder filler of <5 μm. By the plastic after the pearl shell micropowder filler filling after the method of the present invention is processed and by sodium hydroxide, the plastic after the pearl shell micropowder filler filling after the oxidant processing technology is processed and to the plastic (blank sample) that does not contain calcium carbonate micropowder filler ) to compare the performance test, the ratio of absolute ethanol to the plastics treated by the above three methods is 10:1 [or add the coupling agent containing KH-560 (accounting for 25% of the pearl shell powder)] After mixing and st...

Embodiment 3

[0016] In this example, egg shells are selected as the material. First, the egg shells are pretreated by washing, drying, and rough grinding, and then the pretreated egg shells are crushed and classified to obtain egg shell fillers <38 μm. Then, when the oxygen content is 10 % of the air flow in a horse-shaped furnace at about 750 ° C for 2 hours, and put the baked egg shell powder into a desiccator to cool it to obtain <38 μm egg shell powder. The plastic filled with the eggshell micropowder filler treated by the method of the present invention and the plastic filled with the eggshell micropowder filler after the oxidant processing technology and the plastic (blank sample) not containing the calcium carbonate micropowder filler are made For the comparison of performance tests, the plastics treated by the above three methods are respectively kneaded at high temperature according to egg shell micropowder [or egg shell micropowder and KH-560 coupling agent (accounting for 25% of ...

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Abstract

The invention discloses a processing technology for natural biological calcium carbonate miropowder filling material. The processing technology comprises the steps that pretreatments of water washing, drying and coarse grinding are performed to the natural biological material, then the pretreated material is crushed and graded, to obtain natural biological calcium carbonate filling material which is smaller than 38 micrometers, the crushed and graded natural biological calcium carbonate filling material is baked for 0.01 to 24 hours at 100 to 900 DEG C in a high-temperature furnace, and the natural biological calcium carbonate miropowder filling material is obtained through air oxidation. The invention has the characteristics that the processing technology can maintain an aragonite crystal form in natural shells to the largest extent, and can main the heterogeneity and the strong polarity of the microcrystalline surface of the natural shells to the largest extent, so that the shell miropowder has a superior micropore structure; the filling material can obviously improve the mechanical property and the hot property of high molecular material, and simultaneously the pollution problem caused by shells and egg shells to the environment is also solved.

Description

technical field [0001] The invention relates to a processing technology of natural biological calcium carbonate micropowder filler. Background technique [0002] Calcium carbonate is easy to obtain, low in price, low in toxicity, less in pollution, high in whiteness, and large in filling capacity. It is an inorganic filler widely used in organic polymer-based materials at present. According to the size of the grain, it can be divided into ordinary calcium carbonate and nano calcium carbonate. Ordinary calcium carbonate is widely used in plastics as an extender pigment and filler. It has the advantages of improving material rigidity, heat resistance, dimensional stability, and hiding properties. At the same time, it also has a fatal disadvantage: the impact strength of the material is reduced and the processing performance is deteriorated. Therefore, the traditional CaCO 3 Filled plastics can only be used as incremental reinforcements. However, as a structural material, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/00
Inventor 季根忠齐陈泽朱红旗蒋学文
Owner SHAOXING UNIVERSITY
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