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Preparation method of algal polysaccharide-based silver phosphate composite material

A technology of seaweed polysaccharide-based silver phosphate and composite materials, which can be used in botany equipment and methods, chemicals for biological control, biocides, etc., and can solve problems such as uneven distribution, restriction of silver salts, and low distribution density. Achieve the effect of improving fire resistance and antibacterial performance, good fluid performance and uniform distribution

Active Publication Date: 2021-01-01
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the uneven distribution of silver ions on the carrier, low distribution density and poor stability also restrict the application and development of silver salts, especially the direct reaction of alginate with silver phosphate, which makes silver phosphate agglomerate and unevenly distributed on the seaweed polysaccharide macromolecules. Uniformity, which seriously restricts the application of composite materials

Method used

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  • Preparation method of algal polysaccharide-based silver phosphate composite material
  • Preparation method of algal polysaccharide-based silver phosphate composite material
  • Preparation method of algal polysaccharide-based silver phosphate composite material

Examples

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Effect test

Embodiment 1

[0040] A preparation method of seaweed polysaccharide-based silver phosphate composite material, comprising the steps of:

[0041] (1) Weigh according to the mass ratio of sodium dihydrogen phosphate: sodium alginate: deionized water = 1:3:80, dissolve sodium dihydrogen phosphate in deionized water, and adjust the pH to 9-10, then heat to 45°C, slowly add sodium alginate under the action of ultrasound, after the sodium alginate is completely dissolved, keep it for 30 minutes to obtain solution A;

[0042] (2) Weigh silver nitrate equimolar with phosphate, then weigh according to the mass ratio of silver nitrate: 25% ammonia water: deionized water=1:5:5, and dissolve silver nitrate in deionized water at normal temperature , and then drop 25% ammonia water into the silver nitrate solution under stirring, then maintain stirring and react for 3 minutes to obtain solution B;

[0043] (3) Drop solution B into solution A under stirring, stop stirring when the reaction solution turns...

Embodiment 2

[0046] A preparation method of seaweed polysaccharide-based silver phosphate composite material, comprising the steps of:

[0047] (1) Weigh according to the mass ratio of sodium monohydrogen phosphate: sodium alginate: deionized water = 1:3:85, dissolve sodium monohydrogen phosphate in deionized water, and adjust the pH to 9-10, then heat to 45°C, slowly add sodium alginate under the action of ultrasound, after the sodium alginate is completely dissolved, keep it for 45 minutes to obtain solution A;

[0048] (2) Weigh silver nitrate equimolar to phosphate, then weigh according to silver nitrate: 25% ammonia water: deionized water according to the mass ratio of 1:5.5:6, and dissolve silver nitrate in deionized water at normal temperature , and then drop 25% ammonia water into the silver nitrate solution under stirring, then maintain stirring and react for 4 minutes to obtain solution B;

[0049] (3) Drop solution B into solution A under stirring, stop stirring when the reacti...

Embodiment 3

[0052] A preparation method of seaweed polysaccharide-based silver phosphate composite material, comprising the steps of:

[0053] (1) Weigh according to the mass ratio of sodium phosphate: sodium alginate: deionized water = 1:4:100, dissolve sodium phosphate in deionized water, adjust the pH to 9-10 with 1% nitric acid solution, and then heat To 45°C, slowly add sodium alginate under the action of ultrasound, after the sodium alginate is completely dissolved, keep it for 60 minutes to obtain solution A;

[0054] (2) Weigh silver nitrate equimolar with phosphate, then weigh according to the mass ratio of silver nitrate: 25% ammonia water: deionized water=1:6:7, and dissolve silver nitrate in deionized water at normal temperature , and then drop 25% ammonia water into the silver nitrate solution under stirring, then maintain stirring and react for 5 minutes to obtain solution B;

[0055] (3) Drop solution B into solution A under stirring, stop stirring when the reaction soluti...

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Abstract

The invention relates to the technical field of composite materials, in particular to a preparation method of an algal polysaccharide-based silver phosphate composite material. The method comprises the following steps: by using nitrate and sodium alginate as raw materials, generating a sodium alginate / silver phosphate fluid by using an in-situ method, molding, crosslinking, cleaning, and carryingout steam drying to obtain the algal polysaccharide-based silver phosphate composite material. The algal polysaccharide-based silver phosphate composite material prepared by the method disclosed by the invention not only overcome the defect that the algal polysaccharide material is not antibacterial, but also greatly improves the fire resistance and antibacterial property of the composite material, and is particularly suitable for decorative materials with higher requirements on fire resistance and antibacterial property.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a seaweed polysaccharide-based silver phosphate composite material. Background technique [0002] Our country produces about 7.9 million tons of seaweed, 4.14 million tons of kelp, and 1.69 million tons of wakame, accounting for more than 80% of the world's total output, and has a huge resource advantage. At present, the utilization of seaweed is mainly directly used as food, and the added value is very low. How to transform this resource advantage into a high value-added industry advantage is one of the important goals in my country's blue economy. [0003] Alginic acid and its salts are non-toxic, biodegradable marine polysaccharide polymers. Sodium alginate has good biocompatibility, biodegradability, non-toxic side effects, excellent hygroscopicity, gel performance and biological activity, and is widely used in chemistry, biology, medicine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/04C08K3/32C08J7/12C08J5/18A01N59/26A01N43/16A01P3/00A01P1/00
CPCC08K3/32C08J7/12C08J5/18A01N59/26A01N43/16C08L2201/02C08K2003/328C08J2305/04C08L5/04
Inventor 李群董瑞涛李子超张青黄绮颖
Owner QINGDAO UNIV