A kind of double-loaded core-shell hydrogel and its preparation method and application

A hydrogel, dual-loading technology, applied in chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve the problems of complex treatment process, inability to degrade ammonia nitrogen, secondary pollution, etc., and achieve simple operation, A wide range of effects

Active Publication Date: 2021-11-30
内蒙古颐祥杰成科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are many related studies on how to deal with ammonia nitrogen wastewater, but the traditional materials for treating ammonia nitrogen wastewater still have the following defects: first, only nitrification or denitrification is performed, and the treatment process is relatively complicated and the cost is high; Or chemical treatment of ammonia nitrogen wastewater, can not degrade ammonia nitrogen, can not fundamentally achieve the purpose of purifying water; third, the use of chemical agents in the production of materials is easy to cause environmental pollution, and after use is not biodegradable, can not be recycled Form environmental burden and cause secondary pollution

Method used

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  • A kind of double-loaded core-shell hydrogel and its preparation method and application
  • A kind of double-loaded core-shell hydrogel and its preparation method and application
  • A kind of double-loaded core-shell hydrogel and its preparation method and application

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preparation example Construction

[0030] The preparation method of a double-loaded core-shell hydrogel of the present invention uses natural polymers and synthetic polymers with adsorption functional groups as raw materials, and prepares double-loaded core-shell hydrogels through a step-by-step method, and natural polymers with adsorption functional groups Using hemicellulose, cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, starch, hydroxyethyl cellulose, water-soluble chitin, sodium alginate, hyaluronic acid, lignosulfonate, agar, agar A mixture of one or more of sugar and collagen; polyacrylic acid is used for synthetic polymers;

[0031] Specific steps are as follows:

[0032] Step 1, preparation of the core matrix, mixing 5 to 10 parts by mass of natural polymers with adsorption functional groups and 1 to 5 parts of polyacrylic acid aqueous solution, stirring until the natural polymers with adsorption functional groups are completely dissolved; then adding mass The number of parts is 0.1-10 p...

Embodiment 1

[0041] A method for preparing a double-loaded core-shell hydrogel, comprising the following steps:

[0042] Step 1, add 0.1 parts of polyacrylic acid to 100 parts of deionized water in parts by mass, stir at 90°C for 2 hours to obtain matrix A, cool to room temperature for later use; add 5 parts by mass of hemicellulose to Add 100 parts of deionized water, stir at 50°C for 1 hour, until the hemicellulose is completely dissolved in deionized water to obtain matrix B, cool to room temperature for later use;

[0043] Step 2, mix 1 part of matrix A and 5 parts of matrix B in parts by mass, stir until completely mixed at a temperature of 65 ° C, and stir for 3 hours at a stirring speed of 100 r / min;

[0044] Then add 0.1 part of denitrifying bacteria, 0.01 part of nutrient solution and 0.05 part of buffer solution of citric acid-disodium hydrogen phosphate, stir and mix completely, the stirring speed is 100r / min, and the stirring time is 60min to obtain matrix C; wherein, The deni...

Embodiment 2

[0051] A method for preparing a double-loaded core-shell hydrogel, comprising the following steps:

[0052] Step 1, add 0.5 parts of polyacrylic acid into 100 parts of deionized water according to the number of parts by mass, and stir at 120°C for 1.5 hours to obtain matrix A, which is cooled to room temperature for later use; 1 part by mass of cellulose, 2 Add 100 parts of hemicellulose to 100 parts of deionized water, stir at 70°C for 0.5 hours until the cellulose and hemicellulose are completely dissolved in deionized water to obtain matrix B, cool to room temperature for later use;

[0053] Step 2, mix 5 parts by mass of matrix A and 10 parts of matrix B, stir until completely mixed at a temperature of 70°C, and stir for 2.5 hours at a stirring speed of 150r / min;

[0054] Then add 1 part of denitrifying bacteria, 1 part of nutrient solution and 0.02 part of tartaric acid-malic acid-sodium citrate buffer solution, stir and mix completely, the stirring speed is 150r / min, and...

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Abstract

The invention discloses a double-loaded core-shell hydrogel and its preparation method and application. Firstly, a natural polymer with an adsorption functional group is mixed with an aqueous solution of polyacrylic acid, and denitrifying bacteria, a nutrient solution and a pH regulator are added, and the mixture is completely mixed. , to obtain the nuclear matrix; then the Ca-containing 2+ Add the salt and gluconolactone into the core matrix to obtain a mixed solution; secondly, pour the mixed solution into the mold, add the hydrophilic natural polymer solution dropwise, and foam to obtain a porous foamed shell matrix; secondly, pour the porous foamed The core-shell matrix is ​​physically cross-linked and gelled to form a porous core-shell wet gel; the porous core-shell wet gel is placed in deionized water, dialyzed, and freeze-dried to obtain a single-loaded core-shell hydrogel; finally, the single-loaded The core-shell hydrogel is soaked in a nitrifying bacteria solution and then freeze-dried to obtain a double-loaded core-shell hydrogel; the preparation method of the present invention is simple in operation, pollution-free, and has a wide source of raw materials, and the prepared double-loaded core-shell hydrogel has the ability to remove The effect of ammonia nitrogen.

Description

technical field [0001] The invention belongs to the technical field of core-shell hydrogel, and in particular relates to a double-loaded core-shell hydrogel and its preparation method and application. Background technique [0002] While the industry is developing rapidly, it has also caused a series of serious environmental pollution problems, among which the problem of ammonia nitrogen wastewater pollution is particularly serious. Ammonia nitrogen wastewater has a wide range of sources, high emissions, complex components, and great harm. A large amount of nitrogen emissions will have adverse effects on humans and nature. Therefore, it is one of the effective ways to prepare highly efficient, environmentally friendly and pollution-free ammonia nitrogen materials to solve this environmental pollution problem. [0003] At present, there are many related studies on how to deal with ammonia nitrogen wastewater, but the traditional materials for treating ammonia nitrogen wastewa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/10C02F3/30C02F101/16
CPCY02W10/10
Inventor 张敏万豫李成涛王蕾
Owner 内蒙古颐祥杰成科技有限责任公司
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