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Improved carageenan-chitosan polyelectrolyte microspheres as well as preparation method and application thereof

A technology of polyelectrolyte and chitosan, which is applied in the field of modified carrageenan-chitosan polyelectrolyte microspheres and its preparation, can solve the problems of slow adsorption speed, insufficient adsorption capacity, narrow application range, etc., and achieve large adsorption capacity , fast adsorption speed and wide application range

Inactive Publication Date: 2017-02-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing chitosan has insufficient adsorption capacity for heavy metal ions, and the adsorption speed is relatively slow, it is not easy to wash off, and the application range is narrow

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of modified carrageenan-chitosan polyelectrolyte microspheres comprises the following steps:

[0026] 1) Preparation of κ-carrageenan-chitosan polyelectrolyte microspheres by dropping method: Dissolve carrageenan and chitosan in acid solution respectively; then keep the acid solution of chitosan at 50-80°C for 1.5-4h , heat the acid solution of carrageenan at 35-45°C for 30-60 minutes, then mix the two evenly to obtain a mixed solution; then drop the above-mentioned mixed solution into an alkaline solution to obtain chitosan microspheres; then use deionized Rinse the chitosan microspheres with water until the pH of the rinse water=7 to obtain κ-carrageenan-chitosan polyelectrolyte microspheres;

[0027] 2) Add deionized water to the above κ-carrageenan-chitosan polyelectrolyte microspheres, react with ethylene glycol glycidyl ether at 35-55°C for 54-6 hours, then wash with absolute ethanol, and then use Washing with deionized water, filtering and...

Embodiment 1

[0039] The preparation of embodiment 1 modified carrageenan-chitosan polyelectrolyte microspheres (mass ratio=1 / 9 of chitosan and carrageenan)

[0040] 1. Prepare κ-carrageenan-chitosan polyelectrolyte microspheres by dropping method, dissolve 0.9g carrageenan and 0.1g chitosan in 1g / L glacial acetic acid respectively, and stir the chitosan solution evenly with a glass rod Make it dissolve, seal the mouth of the beaker with plastic wrap, then transfer the chitosan solution to a water bath at 70°C for 2 hours, and transfer the carrageenan solution to a water bath at 45°C for 30 minutes. Mix well and evenly to obtain a mixed solution. Take by weighing 40g sodium hydroxide, be dissolved in the beaker of 1000ml, be configured into the sodium hydroxide solution of 1mol / L, draw above-mentioned mixed solution and drop in the sodium hydroxide solution with the syringe, when the mixed solution enters the sodium hydroxide solution, instantly by The orange-yellow solution solidified int...

Embodiment 2

[0049] Embodiment 2 Preparation of modified carrageenan-chitosan polyelectrolyte microsphere shell (mass ratio of chitosan to carrageenan=2 / 3)

[0050] 1. Prepare κ-carrageenan-chitosan polyelectrolyte microspheres by dropping method, dissolve 0.6g carrageenan and 0.4g chitosan in 1g / L glacial acetic acid respectively, and stir the chitosan solution evenly with a glass rod Make it dissolve, seal the mouth of the beaker with plastic wrap, then transfer the chitosan solution to a 70°C water bath for constant temperature for 2 hours, and transfer the carrageenan solution to a 45°C water bath for 30 minutes. Then the two are mixed fully and evenly to obtain a mixed solution. Weigh 40g of sodium hydroxide, dissolve it in a 1000mL beaker, configure it into a 1mol / L sodium hydroxide solution, draw the above-mentioned mixed solution into the sodium hydroxide solution with a syringe, and the mixed solution will instantly flow into the sodium hydroxide solution when it enters the sodium...

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Abstract

The invention belongs to the field of organic materials, particularly relates to an improved carageenan-chitosan polyelectrolyte microspheres as well as preparation method and application thereof, and aims to solve the technical problems of insufficient metal ion adsorption capacity, slow adsorption speed, low elution possibility and narrow application range of existing chitosan. The scheme for solving the technical problems is to provide the improved carageenan-chitosan polyelectrolyte microspheres. The invention also provides the preparation method and the application of the improved carageenan-chitosan polyelectrolyte microspheres.

Description

technical field [0001] The invention belongs to the field of organic materials, and in particular relates to a modified carrageenan-chitosan polyelectrolyte microsphere and its preparation method and application. Background technique [0002] During the discharge of industrial wastewater, a considerable amount of heavy metal elements are deposited in the water body. In the environment, Hg, Cd, Pb, Cr, etc. are toxic to the human body, while Zn, Cu, Ni, Sn, etc. have significant toxic effects on the ecosystem. Heavy metals exist in various chemical forms and are discharged into the environment. Even if the concentration is small, they can still accumulate in algae and bottom mud, and be enriched by the body surface of fish and shellfish, resulting in food chain concentration and causing public nuisance. Different from the pollution of other organic compounds, heavy metal pollution cannot reduce or eliminate the harmfulness through physical, chemical or biological purificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B01J20/28B01J13/14B01J13/02C02F1/28C02F1/62
CPCB01J13/02B01J13/14B01J20/24B01J20/28021B01J2220/4806B01J2220/4812B01J2220/4825C02F1/286C02F2101/20C02F2101/22
Inventor 张利李玉宝熊鑫
Owner SICHUAN UNIV
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