Method for preparing environment-responsive polymers by composite assembly

A responsive polymer technology, which is applied in the field of magnetic field responsive polymers for cement concrete, can solve unreported problems and achieve broad application prospects

Active Publication Date: 2022-02-08
BEIJING UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, using an innovative molecular design synthesis route to obtain an environmentally responsive polymer, the material not only has intelligent environmental responsiveness, but also has the characteristic properties of inhibiting concrete shrinkage and resisting water absorption, and is also conducive to industrial production and application. There is no report on the aspect research at home and abroad

Method used

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  • Method for preparing environment-responsive polymers by composite assembly
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  • Method for preparing environment-responsive polymers by composite assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First, 30g of styrene-propylene and 90g of dimethylformamide were added to the reactor, stirred and heated to 90°C, filled with nitrogen for 5 times to remove oxygen and then sealed for 30 minutes, added 11.08g of isooctyl 3-mercaptopropionate, and then Add 17.8g mass fraction of sulfuric acid solution of ceric ammonium sulfate of 25%, after stirring for 15 minutes, add 53.39g mass fraction of 80% glucaric acid aqueous solution, after constant temperature reaction for 3 hours, cool to 30°C, add mass fraction of 25% % triethylamine solution neutralized to a pH of 7, desolvated by distillation under reduced pressure, and then adding 30g mass fraction of 5% sodium dodecyl diphenyl ether disulfonate aqueous solution to obtain polymer emulsion; 40g of sodium alginate and 160g of deionized water were added to the reactor, stirred and heated to 80°C, purged with nitrogen for 10 minutes, added 20g of ferric oxide powder and stirred ultrasonically, and then added 0.8g of glutaral...

Embodiment 2

[0034] First, 30g of vinyltoluene and 150g of dimethylformamide were added to the reactor, stirred and heated to 80°C, filled with nitrogen gas for 4 times to remove oxygen and then sealed for 20 minutes, then added 27.71g of isooctyl 3-mercaptopropionate, Then add 6.98g mass fraction of 20% cerium ammonium nitrate nitric acid solution, stir for 5 minutes and add 104.1g mass fraction of 40% gluconic acid aqueous solution, after constant temperature reaction for 6 hours, cool to 40°C, add 30% mass fraction % ethylenediamine solution is neutralized to pH 6, and the solvent is removed by distillation under reduced pressure, and then 12g of a mass fraction of 20% sodium stearate is added to obtain a polymer emulsion; 40g of hyaluronic acid and 120g of Add ionized water into the reactor, stir and raise the temperature to 60°C, blow nitrogen for 20 minutes, add 8g ferric oxide powder and ultrasonic mechanical stirring, then add 2g boric acid, stir and react for 1 hour, then pour the ...

Embodiment 3

[0036] First, 30g of ethyl methacrylate and 210g of dimethyl sulfoxide were added to the reactor, stirred and heated to 80°C, filled with nitrogen for 4 times to remove oxygen and sealed for 10 minutes, added 6.32g of isopropanol, and then added 28.85 g mass fraction is 40% cerium ammonium nitrate nitric acid solution, after stirring for 12 minutes, add 51.58 g mass fraction of 50% gluconic acid aqueous solution, after constant temperature reaction for 6 hours, cool to 35 °C, add mass fraction is 10% hydrogen Potassium oxide solution was neutralized to pH 7, the solvent was removed by distillation under reduced pressure, and then 10.5 g of an aqueous solution of sodium stearate with a mass fraction of 20% was added to obtain a polymer emulsion; 40 g of hyaluronic acid and 100 g of deionized water Add it into the reactor, stir and raise the temperature to 50°C, blow nitrogen for 20 minutes, add 32g of ferric oxide powder and ultrasonically mechanically stir, then add 1.2g of epi...

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Abstract

The invention relates to a method for preparing an environment-responsive polymer by composite assembly. The present invention uses hydrophobic monomers, polysaccharide derivatives, etc. as the main reaction raw materials, and prepares a magnetic field responsive polymer through the method of first grafting polymerization, cross-linking reaction, and then compound assembly, that is, the hydrophobic monomers are first grafted and polymerized, and then The polysaccharide derivative and ferric iron tetroxide powder are cross-linked under the action of a cross-linking agent to obtain a hydrogel, and finally composite assembled to obtain a magnetic field-responsive polymer. The process of the invention is energy-saving and efficient, and the operation is simple. The magnetic field-responsive polymer is successfully prepared through the method of polysaccharide derivative hydrogel composite assembly of the branch structure polymer, which shows multiple effects such as excellent environmental response and maintaining the stability of the concrete volume, and realizes The goal of self-driven improvement of application performance of concrete materials has very good market competitiveness and application prospects.

Description

technical field [0001] The present invention relates to the technical field of a magnetic field responsive polymer for cement concrete, in particular to a specific method for synthesizing an environment responsive polymer using hydrogel composite assembly of a hydrophobic monomer firstly grafted and polymerized and then crosslinked with polysaccharide derivatives Preparation. Background technique [0002] Concrete is the most widely used building material in modern construction projects. With the needs of construction projects and the advancement of science and technology, it has been widely used in industries, water conservancy, agriculture, transportation and seaports. However, due to factors such as concrete structure, materials, and environmental influences, it is easy to cause early cracking and shrinkage cracking of concrete, which plagues concrete construction and affects the durability of concrete. Shrinkage is the key factor leading to non-load cracks in concrete s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C04B24/26C08F112/06C08F112/12C08F120/18C08F120/14C08J3/24C08J3/075C08L5/04C08L5/08
CPCC04B40/0046C04B24/26C04B24/2641C04B24/2676C08F112/06C08F112/12C08F120/18C08F120/14C08J3/24C08J3/075C08J2305/04C08J2305/08C04B22/06C04B24/38C04B22/124
Inventor 王子明宋晓飞李婷宋作宝刘晓李晓宁曹虎赵攀
Owner BEIJING UNIV OF TECH
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