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Degradable expanded polymer grouting material as well as preparation method and application thereof

A polymer water-absorbing, high-molecular polymer technology, applied in coatings and other directions, can solve problems such as difficult to achieve water inrush plugging in karst areas, lack of pertinence in the governance system, complex water inrush in karst areas, etc., to achieve easy industrialization, The effect of low price and reduced production cost

Pending Publication Date: 2021-06-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some scholars have carried out research on this aspect at this stage, and have proposed different treatment methods based on the materials they have developed, the extreme complexity of water inrush in karst areas makes the existing treatment system lack of pertinence, and it is difficult to achieve efficient treatment. Water inrush sealing in karst area
[0006] In the prior art, polyacrylate water-absorbing resin has been used as the component of the expansion polymer grouting material to block karst inrush water, which can have a high expansion ratio and have an efficient plugging effect on karst inrush water. In further research, the inventor found that although the expanded polymer grouting material is green and pollution-free to the environment, the degradation performance of the polyacrylate water-absorbing resin is poor, and the gel after absorbing water and swelling exists in the ecological environment for a long time, which is easy to cause secondary pollution to the environment

Method used

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  • Degradable expanded polymer grouting material as well as preparation method and application thereof
  • Degradable expanded polymer grouting material as well as preparation method and application thereof
  • Degradable expanded polymer grouting material as well as preparation method and application thereof

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preparation example Construction

[0028] In a first aspect, the present invention provides a method for preparing a degradable polymer granule A, comprising the following steps:

[0029] Using a mixed solution of hydrogen peroxide and sulfuric acid to modify the cellulose-based high-molecular water-absorbing resin or natural polymer powder in a water bath to obtain a modified cellulose-based high-molecular water-absorbing resin or a modified natural polymer;

[0030] Put the modified cellulose-based polymer water-absorbing resin or modified natural polymer into water, and heat and activate it in a water bath;

[0031] Mix the crosslinking agent, acrylic acid solution and the active substance containing the hydrophilic group, and polymerize to obtain the precursor;

[0032] removing air from the activation system after heating and activation in a water bath, and adding the precursor and initiator to it, heating and reacting to obtain a colloidal polymer;

[0033] Grinding the colloidal polymer, and then sprayi...

Embodiment 1

[0082] A preparation of a degradable ultra-high expansion grouting material for efficient plugging of karst pipeline type water gushing, comprising the following steps:

[0083] A: Add 10g of dried bamboo chips of 100-200 mesh to 100ML 4wt% H 2 o 2 / 2wt%H 2 SO 4 In the mixed solution, the mixed solution after adding bamboo chips was placed in a 70°C pot and heated in a water bath for 3 hours, the reactant was washed with deionized water until neutral, and dried in a vacuum drying oven at 80°C for 12 hours to obtain modified bamboo chips .

[0084] B: Put the modified bamboo chips prepared in step A into 10 mL of deionized water, then put it into a pot, set up magnetic stirring and condensing reflux, heat in a water bath at 80°C, and activate for 1 hour.

[0085] C: Add 0.3 g of polyethylene glycol diglycidyl ether to 100 g of acrylic acid solution with a concentration of 20%, then add 0.5 g of polyvinyl alcohol, and stand at 0° C. for 1 h to form a precursor.

[0086] D: ...

Embodiment 2

[0090] A preparation of a degradable ultra-high expansion grouting material for efficient plugging of karst pipeline type water gushing, comprising the following steps:

[0091] A: Add 20g of dried bamboo chips of 100-200 mesh to 500ML 8wt% H 2 o 2 / 6wt%H 2 SO 4 In the mixed solution, the mixed solution after adding bamboo chips was placed in a 70°C pot and heated in a water bath for 3 hours, the reactant was washed with deionized water until neutral, and dried in a vacuum drying oven at 80°C for 12 hours to obtain modified bamboo chips .

[0092] B: Put the modified bamboo chips prepared in step A into 20mL of deionized water, then put it into a pot, set up magnetic stirring and condensing reflux, heat in a water bath at 80°C, and activate for 1 hour.

[0093] C: Add 1.8 g of polyethylene glycol diglycidyl ether to 100 g of acrylic acid solution with a concentration of 20%, then add 1 g of starch solution, and stand at 25° C. for 1 h to form a precursor.

[0094] D: After ...

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Abstract

The invention discloses a degradable expanded polymer grouting material as well as a preparation method and application thereof. The preparation method includes the steps: carrying out water bath modification on bamboo sawdust powder with a hydrogen peroxide and sulfuric acid mixed solution, to obtain modified bamboo sawdust; putting the modified bamboo sawdust into water, and heating and activating in a water bath; mixing a cross-linking agent, an acrylic acid solution and an active substance containing a hydrophilic group, and carrying out polymerization reaction to obtain a precursor; removing air from the activation system subjected to water bath heating activation, adding the precursor and an initiator into the activation system, and carrying out a heating reaction to obtain a colloidal polymer; and mincing the colloidal polymer, and then spraying a gelling catalyst into the colloidal polymer to obtain degradable high-molecular polymer granules A.

Description

technical field [0001] The invention belongs to the technical field of water inrush plugging materials for underground engineering, and in particular relates to a degradable expanded polymer grouting material and its preparation method and application, which can be used specifically for water inrush plugging in karst areas. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the rapid development of society, traffic engineering has developed rapidly, the pace of infrastructure construction has been accelerated, and projects such as railways, tunnels, highways, and mines are increasing. Especially under the background of the vigorous implementation of the 21st Century Mar...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J3/12C08G81/02C08H8/00C08F283/06C08F220/06C08L87/00
CPCC08J7/0427C08J3/12C08G81/02C08H8/00C08F283/06C08L87/005C08J2387/00C08J2471/02C08J2471/00C08F220/06
Inventor 刘人太马晨阳李术才闫瑾陈孟军张庆松郑卓白继文刘衍凯张春雨刘凯
Owner SHANDONG UNIV
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