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Barium-containing super absorbent resin microsphere as well as preparation and application thereof

A high water-absorbent resin and water-absorbent technology, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problem of demanding cathodic protection current resistance, high economic cost, and reduced bonding force between steel and concrete And other problems, to achieve significant economic and social benefits, simple production process, improve the effect of mechanical properties

Active Publication Date: 2022-05-24
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the marine environment or in the presence of chloride ions, free chloride ions can penetrate into the interior of the cement-based material and diffuse to the surface of the steel bar, and then accumulate, causing steel bar corrosion, It reduces the bonding force between steel bars and concrete, destroys concrete components, leads to poor durability, shortens the service life, causes huge economic losses, and even brings safety problems in severe cases
[0003] At present, there are many anti-rust technologies for steel bars. Coating protection, cathodic protection technology, use of stainless steel bars, and electrochemical repair are commonly used anti-rust methods, but these Anti-corrosion technologies have their own disadvantages, such as: stainless steel is expensive and costly; during coating protection, if the concentration of chloride ions is higher than the critical value that causes steel bar corrosion or the concrete around the steel bar is completely carbonized, the steel bar will continue to be damaged. Corrosion; cathodic protection has strict requirements on current resistance, and the work of commissioning and commissioning is complicated, and the required economic cost is large, etc.
Therefore, it is an effective antirust method to carry out chloride ion curing and hinder the diffusion and aggregation of free chloride ions to the steel surface, but there are few researches on this aspect at present. Chloride-cured materials without

Method used

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  • Barium-containing super absorbent resin microsphere as well as preparation and application thereof
  • Barium-containing super absorbent resin microsphere as well as preparation and application thereof
  • Barium-containing super absorbent resin microsphere as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of barium-containing superabsorbent resin microspheres, comprising the following steps:

[0032] 1) Take 20 g of barium acetate, 2 g of sodium alginate, 8 g of polyvinyl alcohol, 8 g of aluminum nitrate, 15 g of polyacrylic resin and an appropriate amount of deionized water.

[0033] 2) The barium acetate is prepared into a saturated solution with deionized water, and then 15g of polyacrylic resin is soaked in the saturated solution for 14 minutes to the maximum absorption saturation;

[0034] 3) Sodium alginate and polyvinyl alcohol are prepared into a mixed solution (concentration 4%) with deionized water, and aluminum nitrate is prepared into a saturated solution of aluminum nitrate with deionized water;

[0035] 4) Add the soaked polyacrylic acid resin into the mixed solution of sodium alginate and emulsifier prepared in step 3), firstly perform machine stirring for 12min, 300r / min; then manually stir for 3min, 30r / min to form a resin mixed solu...

Embodiment 2

[0038] A preparation method of barium-containing superabsorbent resin microspheres, comprising the following steps:

[0039] 1) Take 25 g of barium acetate, 2 g of sodium alginate, 5 g of polyvinyl alcohol, 4 g of aluminum nitrate, 10 g of polyethylene oxide resin and an appropriate amount of deionized water.

[0040] 2) The barium acetate is prepared into a saturated solution with deionized water, and then 10 g of polyethylene oxide resin is soaked in the saturated solution for 10 minutes to the maximum absorption saturation;

[0041] 3) Sodium alginate and polyvinyl alcohol are prepared into a mixed solution (concentration 5%) with deionized water, and aluminum nitrate is prepared into a saturated solution of aluminum nitrate with deionized water;

[0042] 4) Add the soaked polyethylene oxide resin into the mixed solution of sodium alginate and emulsifier prepared in step 3), firstly perform machine stirring for 15min, 350r / min; then manually stir for 4min, 20r / min to form a...

Embodiment 3

[0045] 1) Take 15g of barium acetate, 4g of sodium alginate, 8g of polyvinyl alcohol, 8g of calcium lactate, g of polyacrylic acid resin and an appropriate amount of deionized water.

[0046] 2) The barium acetate is prepared into a saturated solution with deionized water, and then 15g of polyacrylic resin is soaked in the saturated solution for 15 minutes to the maximum absorption saturation;

[0047] 3) Sodium alginate and polyvinyl alcohol are prepared into a mixed solution (concentration 2%) with deionized water, and calcium lactate is prepared into saturated calcium lactate solution with deionized water;

[0048] 4) Add the soaked polyacrylic acid resin into the mixed solution of sodium alginate and emulsifier prepared in step 3), firstly perform machine stirring for 20min, 200r / min; then manually stir for 2min, 40r / min to form a resin mixed solution;

[0049]5) The resin mixed solution of step 4) (with a syringe with an inner diameter of 0.34 mm) was dropped into a satur...

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Abstract

The invention belongs to the technical field of functional concrete additives, particularly relates to a barium-containing super absorbent resin microsphere, and further relates to preparation of the barium-containing super absorbent resin microsphere and application of the barium-containing super absorbent resin microsphere in chloride ion curing. The microsphere is prepared from the following raw materials: a barium source, sodium alginate, an emulsifier, a curing agent and water-absorbent resin. The microspheres are pre-buried in the cement-based material to adjust and supplement gaps generated after cement is hydrated, so that the pore structure of the cement-based material is improved, diffusion of free chloride ions is further hindered, and the curing efficiency is further improved.

Description

technical field [0001] The invention belongs to the technical field of functional concrete additives, in particular to a barium-containing superabsorbent resin microsphere, and also relates to the preparation of the barium-containing superabsorbent resin microsphere and its application in chloride ion curing. Background technique [0002] In the marine environment or in the presence of chloride ions, free chloride ions can penetrate into the cement-based material and diffuse to the surface of the steel bar, and then aggregate, causing corrosion of the steel bar, reducing the bonding force between the steel bar and the concrete, and destroying the concrete member. This leads to poor durability, shortened service life, huge economic losses, and even safety problems in severe cases. [0003] At present, there are many kinds of rust inhibition technologies for steel bars. Coating protection, cathodic protection technology, the use of stainless steel bars, electrochemical repair,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B28/00
CPCC04B40/0039C04B28/00C04B24/04C04B24/2623C04B24/2641C04B24/38C04B22/085Y02W30/91
Inventor 刘晓海殷昆鹏张美香罗忠涛弥杰郅天一潘涵
Owner ZHENGZHOU UNIV
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