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Chitosan-oyster shell composite microsphere and preparation method thereof

A technology of composite microspheres and chitosan, which is applied in chemical instruments and methods, alkali metal compounds, and other chemical processes, can solve the problems of inconspicuous modification of oyster shells, low removal rate, and inconspicuous water treatment capabilities, etc. problem, achieve the effect of preventing sedimentation and coagulation, good absorption effect, and improving surface tension

Active Publication Date: 2016-12-21
LIMING VOCATIONAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the modification effect of the modified agent on oyster shells is not obvious, the improvement of the water treatment ability is not obvious, and the removal rate of nitrogen and phosphorus in the water is low.

Method used

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  • Chitosan-oyster shell composite microsphere and preparation method thereof
  • Chitosan-oyster shell composite microsphere and preparation method thereof

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preparation example Construction

[0033] The invention provides a kind of preparation method of chitosan-oyster shell composite microsphere, comprises the following steps:

[0034] (1) mixing scallop powder, oyster shell powder and water to obtain a safflower-oyster shell suspension;

[0035] (2) the suspension obtained in the step (1) is mixed with an aqueous solution of chitosan to obtain a composite solution of chitosan-squat-oyster shell;

[0036] (3) the chitosan-squat-oyster shell composite solution obtained in the step (2) is mixed with a dispersant, an emulsifier and an oil phase to obtain an emulsion containing water-in-oil droplets;

[0037] (4) Mix the emulsion obtained in the step (3) with a glutaraldehyde-saturated toluene solution to carry out a cross-linking reaction to obtain chitosan-oyster shell composite microspheres.

[0038] The scallop powder, oyster shell powder and water are mixed to obtain the scallop-oyster shell suspension. In the present invention, the addition of the oyster shell...

Embodiment 1

[0071] (1) The oyster shells were first washed with 2mol / L hydrochloric acid, crushed and passed through a 100-mesh sieve to obtain oyster shell powder, dried in a muffle furnace at 200°C for 3 hours, and sealed for storage. Weigh 5g of oyster shell powder and add it to 200ml of deionized water, add 0.5g of oyster shell powder with a particle size of 100 mesh, and ultrasonically disperse with a power of 1000w for 2 hours to obtain a uniform suspension;

[0072] (2) Take 2g chitosan and add it into 100ml deionized water containing 5ml glacial acetic acid, carry out magnetic stirring for 10 hours with the rotating speed of 500rpm to make chitosan dissolve completely to obtain a transparent viscous solution;

[0073] (3) Slowly add the obtained chitosan solution into 120ml of oyster shell powder suspension under the magnetic stirring condition of 250rpm rotating speed, and continue to stir for 24 hours to obtain chitosan modified oyster shell powder solution.

[0074] (4) Add 40mL ...

Embodiment 2

[0078] (1) The oyster shells were washed with 5 mol / L hydrochloric acid first, crushed and passed through a 100-mesh sieve to obtain oyster shell powder, dried in a muffle furnace at 250°C for 2 hours, and sealed for storage. Weigh 5g of oyster shell powder and add it to 200ml deionized water, add 0.5g of oyster shell powder with a particle size of 100 mesh, and ultrasonically disperse for 2 hours under the condition of 1000w to obtain a uniform suspension;

[0079] (2) Take 2g carboxymethylated chitosan and add it into 100ml deionized water containing 6ml glacial acetic acid, and magnetically stir at a rotating speed of 1000rpm for 10 hours to completely dissolve chitosan to obtain a transparent and viscous solution;

[0080] (3) The chitosan solution obtained is slowly added to the oyster shell powder suspension obtained in the step (1) of 140ml under the stirring condition of the rotating speed of 400rpm, and continued to stir for 24 hours to obtain the chitosan modified oys...

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Abstract

The invention provides a chitosan-oyster shell composite microsphere and a preparation method thereof. The preparation method comprises the following steps: mixing sesbania powder and oyster shell powder with water to obtain sesbania-oyster shell suspension liquid; then mixing the obtained suspension liquid with a chitosan water solution to obtain a chitosan-sesbania-oyster shell composite liquor; then mixing the obtained chitosan-sesbania-oyster shell composite liquor with a dispersing agent, an emulsifier and an oil phase to obtain an emulsion containing water in oil droplets; and finally mixing the obtained emulsion with a glutaraldehyde saturated methylbenzene liquor to perform crosslinking reaction, thus obtaining the chitosan-oyster shell composite microsphere. According to the invention, sesbania powder is uniformly distributed to the surface of oyster shell powder, so as to play the roles of the thickening agent and a surface modifier and promote compounding of the oyster shell powder and chitosan; the mixing of the suspension liquid and the chitosan water solution can ensure forming of a homogeneous phase composite material, so as to promote smooth procedure of subsequent interlinking reaction and further improve the modification capability of the obtained composite microsphere to the water body.

Description

technical field [0001] The invention belongs to the technical field of eutrophic water body improvement, and in particular relates to a chitosan-oyster shell composite microsphere and a preparation method thereof. Background technique [0002] Eutrophication of water body refers to the phenomenon of water quality pollution caused by excessive content of nutrients such as nitrogen and phosphorus in water body. Nitrogen and phosphorus in water body mainly come from chemical fertilizers used in agricultural production, domestic sewage and industrial wastewater. The eutrophication of the water body will lead to the massive growth of algae, covering the surface of the water body, deteriorating the water quality and destroying the original ecological balance of the water body. The improvement of eutrophic water body has received extensive attention. [0003] Oyster shells come from the waste of coastal oyster production and consumption, and a large number of them are landfilled o...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
CPCB01J20/24B01J20/28021B01J2220/4825B01J2220/4881C02F1/286
Inventor 李云龙黄韡潘碧锋高慷慨
Owner LIMING VOCATIONAL UNIV
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