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Preparation method of ultralow-smoke algal polysaccharide material

A seaweed polysaccharide, ultra-low technology, applied in the field of preparation of ultra-low-smoke seaweed polysaccharide materials, can solve the problems of low silver loading rate, silver pressure, etc., and achieve the effect of simple process and strong antibacterial performance

Active Publication Date: 2021-03-09
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of adding silver to the alginate fiber mainly includes silver plating on the surface of the fiber, adding silver compounds, complexes or metallic silver to the fiber spinning solution and soaking the fiber in a silver-containing solution. In order to achieve effective antibacterial, The silver content in the material accounts for 1% to 7% of the weight of the alginate fiber. Since these methods have a low loading rate of silver, the actual amount used is far greater than this range, which undoubtedly puts pressure on the rare resource of silver.

Method used

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  • Preparation method of ultralow-smoke algal polysaccharide material
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  • Preparation method of ultralow-smoke algal polysaccharide material

Examples

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Embodiment 1

[0039] (1) Sodium chloride, polyvinylpyrrolidone K90 with an average molecular weight ≥ 120,000, sodium alginate, and deionized water were formulated into solution A at a mass ratio of 1:0.2:20:450; specifically: first deionized Heat the water to 40°C, under the action of ultrasonic waves, dissolve polyvinylpyrrolidone K90, chloride and sodium alginate in sequence, and keep the reaction for 50 minutes to get it;

[0040] (2) Weigh silver nitrate equimolar with sodium chloride, then silver nitrate, 25% ammonia water, and deionized water are made into solution B according to the mass ratio of 1:5.5:6; Dissolve silver nitrate in water, then add 25% ammonia water dropwise into the silver nitrate solution under stirring conditions, and keep stirring for 4 minutes to obtain the product;

[0041] (3) Add solution B dropwise to solution A under heating and stirring in a water bath at 40°C, stop stirring when the reaction solution turns milky white, and keep it standing at a constant t...

Embodiment 2

[0044] (1) Potassium chloride, polyvinylpyrrolidone K90 with an average molecular weight ≥ 120,000, sodium alginate, and deionized water were formulated into solution A at a mass ratio of 1:0.1:15:400; specifically: first deionized Heat the water to 30°C, under the action of ultrasonic waves, dissolve polyvinylpyrrolidone K90, chloride and sodium alginate in sequence, and keep the reaction for 60 minutes to get it;

[0045] (2) Weigh silver nitrate equimolar with potassium chloride, then silver nitrate, 25% ammonia water, and deionized water are made into solution B according to the mass ratio of 1:5:5; Dissolve silver nitrate in water, then add 25% ammonia water dropwise into the silver nitrate solution under stirring conditions, and keep stirring for 3 minutes to obtain the product;

[0046] (3) Add solution B dropwise to solution A under heating and stirring in a water bath at 40°C, stop stirring when the reaction solution turns milky white, and keep it standing at a consta...

Embodiment 3

[0049] (1) Ammonium chloride, polyvinylpyrrolidone K90 with an average molecular weight ≥ 120,000, sodium alginate, and deionized water were formulated into solution A at a mass ratio of 1:0.3:25:500; specifically, deionized Heat the water to 50°C, under the action of ultrasonic waves, dissolve polyvinylpyrrolidone K90, chloride and sodium alginate in sequence, and keep the reaction for 30 minutes to get the product;

[0050] (2) Weigh silver nitrate equimolar with ammonium chloride, then silver nitrate, 25% ammonia water, and deionized water are made into solution B according to the mass ratio of 1:6:7; Dissolve silver nitrate in water, then add 25% ammonia water dropwise into the silver nitrate solution under stirring conditions, and keep stirring for 5 minutes to obtain the product;

[0051] (3) Add solution B dropwise to solution A under heating and stirring in a water bath at 40°C, stop stirring when the reaction solution turns milky white, and keep it standing at a constan...

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Abstract

The invention belongs to the technical field of algal polysaccharide materials, and particularly relates to a preparation method of an ultralow-smoke algal polysaccharide material, which comprises thefollowing steps: preparing nano silver chloride sol by using marine biological resource sodium alginate as a raw material through a particle size controllable technique, shaping by using forming equipment, and carrying out ion exchange reaction in a coagulating bath of divalent metal ions to obtain the ultralow-smoke algal polysaccharide material. The method is simple in process, high in operability, free of pollution, environmentally friendly in material and suitable for large-batch industrial production.

Description

technical field [0001] The invention belongs to the technical field of seaweed polysaccharide materials, in particular to a preparation method of ultra-low-smoke seaweed polysaccharide materials. Background technique [0002] In addition to shopping malls, hotels, restaurants, entertainment venues, vehicles and other crowded places that are prone to fire, residential buildings in urban and rural areas are also prone to fire. In these numerous fires, the smoke produced by combustible materials, including flame-retardant materials, is very harmful. People who were "burned to death" were actually poisoned by smoke, suffocated, and then burned to death. So smoke is the main cause of casualties. Therefore, in addition to having a good flame-retardant effect, it is more important to achieve low-smoke or smoke-free flame-retardant materials. [0003] In the prior art, halogenated flame retardants are one of the good flame retardants, but halogenated flame retardants usually incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/00
CPCC08B37/0003
Inventor 李群周晓东李子超薛云张信黄绮颖
Owner QINGDAO UNIV
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