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Serine/kaolinite intercalation complex prepared with 1.0nm hydrated kaolinite serving as intercalation precursor and preparation method

A technology for hydrated kaolinite and intercalation complexes, applied in silicon compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of low reaction temperature, low intercalation rate, low concentration, etc., and achieves low equipment requirements , the process is simple, the effect of fast response

Active Publication Date: 2013-08-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, when the concentration of serine solution and the reaction temperature are relatively increased, the amount of precipitated serine crystals also increases, that is, although the intercalation speed is faster at high temperature, the crystallization rate is faster, so that the intercalated Serine molecules are affected by crystallization and do not necessarily increase, so the intercalation rate is not high
On the other hand, when the concentration and temperature are relatively low, although there are relatively few serine crystals precipitated before intercalation, the intercalation rate is not high due to the low solution concentration and low reaction temperature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Dissolve serine crystals in water by stirring to obtain a pure serine aqueous solution (1), in which the concentration of the solution is controlled at 1.0mol / L.

[0038] (2) Divide every 1g of d 001 =1.0nm hydrated kaolinite powder was added to 100ml of 1.0mol / L serine aqueous solution (1), and then reacted by magnetic stirring at 10°C for 2 minutes, then adjusted the temperature to 30°C, and continued to stir for 2 minutes. A reaction product mixed solution (2) was obtained.

[0039] (3) Centrifuge the reaction product mixed solution (2), remove the supernatant, and finally obtain the serine / kaolinite intercalation complex powder.

[0040] The interlayer spacing of the serine / kaolinite intercalation composite prepared according to the above steps was obtained from the d of the original stone 001 =0.72nm expanded to d 001 =1.14nm, the intercalation rate of the obtained serine / kaolinite intercalation complex was 91%.

Embodiment 2

[0042] (1) Dissolve serine crystals in water by stirring to obtain a pure serine aqueous solution (1), in which the concentration of the solution is controlled at 1.5mol / L.

[0043] (2) Divide every 1g of d 001 =1.0nm hydrated kaolinite powder was added to 100ml of 1.5mol / L serine aqueous solution (1), and then reacted by magnetic stirring at 15°C for 3 minutes, then adjusted the temperature to 40°C, and continued to stir for 2 minutes. A reaction product mixed solution (2) was obtained.

[0044] (3) Centrifuge the reaction product mixed solution (2), remove the supernatant, and finally obtain the serine / kaolinite intercalation complex powder.

[0045] The interlayer spacing of the serine / kaolinite intercalation composite prepared according to the above steps was obtained from the d of the original stone 001 =0.72nm expanded to d 001 =1.14nm, the intercalation rate of the obtained serine / kaolinite intercalation complex was 100%.

Embodiment 3

[0047] (1) Dissolve serine crystals in water by stirring to obtain a pure serine aqueous solution (1), wherein the concentration of the solution is controlled at 2.0mol / L.

[0048] (2) Divide every 1g of d 001 =1.0nm hydrated kaolinite powder was added to 100ml of 2.0mol / L serine aqueous solution (1), and then reacted by magnetic stirring at 20°C for 3 minutes, then adjusted the temperature to 60°C, and continued to stir for 1 minute. A reaction product mixed solution (2) was obtained.

[0049] (3) Centrifuge the reaction product mixed solution (2), remove the supernatant, and finally obtain the serine / kaolinite intercalation complex powder.

[0050] The interlayer spacing of the serine / kaolinite intercalation composite prepared according to the above steps was obtained from the d of the original stone 001 =0.72nm expanded to d 001 =1.14nm, the intercalation rate of the obtained serine / kaolinite intercalation complex was 100%.

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Abstract

The invention discloses a serine / kaolinite intercalation complex prepared with 1.0nm hydrated kaolinite serving as an intercalation precursor and a preparation method. The preparation method comprises the following steps of: mixing hydrated kaolinite with interlamellar spacing of d001=1.0nm with serine solution; controlling the system to stir for a few minutes at relatively low temperature; and controlling to react for a few minutes at relatively high temperature, thus obtaining the serine / kaolinite intercalation complex. The spacing d001 of kaolinite layers expandes from 1.0nm before intercalating the serine to 1.14nm after intercalating the serine, the intercalating rate is up to 90 to 100%; the serine is arranged as a singe layer between the kaolinite layers in a way of being parallel to a kaolinite lamella; a carboxyl of the serine forms a hydrogen bond together with a hydroxyl on the inner surface of the kaolinite, and an amidogen forms another hydrogen bond together with an oxygen atom of a kaolinite silica layer. The preparation method is simple in preparation process and realizes batch production, and the prepared serine / kaolinite intercalation complex can live stably for a long time.

Description

technical field [0001] The invention relates to a preparation method of a serine / kaolinite intercalation compound, in particular to a lattice constant d in the c-axis layer direction 001 = 1.0nm Serine / kaolinite intercalation complex prepared by using hydrated kaolinite as the intercalation precursor and its preparation method. Background technique [0002] Kaolinite is an important non-metallic mineral resource. It is mainly composed of kaolinite minerals such as micro flakes, tubes, and laminations. It is widely used in papermaking, ceramics, paints, rubber, plastics, petrochemicals, etc. field. Kaolinite (Al 2 Si 2 o 5 (OH) 4 ) is a typical 1:1 layered silicate, which is composed of silicon-oxygen tetrahedral sheets and aluminum-oxygen octahedral sheets arranged periodically in the c-axis direction, and the layers are mainly connected by hydrogen bonds. combined. Under certain conditions, some molecules can overcome the interlayer force and insert into the interlay...

Claims

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Application Information

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IPC IPC(8): C01B33/44
Inventor 杜丕一郑婉周璟马宁韩高荣翁文剑赵高凌沈鸽宋晨路程逵徐刚张溪文
Owner ZHEJIANG UNIV
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