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An inorganic nano, waterproof plugging technology, applied in the field of organic-inorganic nano-composite hybrid waterproof plugging gel and its preparation, can solve the problems of dry shrinkage cracking, poor compressive strength, etc., and achieve improved water absorption, strength, and good durability , the effect of strong adhesion
Inactive Publication Date: 2019-01-11
BEIJING MUNICIPAL CONSTR +4
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The prepared organic-inorganic composite hybrid gel can improve the water absorption and strength of the gel, so as to s
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[0025] Example 1
[0026] Step a: Weigh 5g of calcium acrylate and magnesium acrylate, 0.2g of N,N'-methylenebisacrylamide and 22g of acrylic multi-element copolymer emulsion and mix them in distilled water evenly, add a certain amount of silica sol dropwise under stirring at room temperature , And then dropwise add different mass parts of triethanolamine. Stir for 30 minutes to mix thoroughly to prepare 50 g of A liquid.
[0027] Step b: Weigh 1.5 g of ammonium persulfate and 0.1 g of ferrous sulfate, and dissolve them in 48.4 g of distilled water to prepare liquid B.
[0028] Step c: Pour the liquid A prepared in step a and the liquid B prepared in step b into a 100 ml separatory funnel, and then quickly open the separator valve, and the A and B liquids are fully mixed under stirring. Use the inverted cup method to test the setting time.
[0029] It can be seen from Table 2 that with the increase of the accelerator content, the gel setting time is shortened, and it can be solidifi...
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[0030] Example 2
[0031] Step a: Weigh 5g of calcium acrylate and magnesium acrylate, 0.2g of N,N'-methylenebisacrylamide and 22g of acrylic acid multi-element copolymer emulsion and mix them evenly in distilled water. Under stirring at room temperature, add silicon with different mass fractions dropwise Sol, then 1.5g of triethanolamine was added dropwise. Stir for 30 minutes to mix thoroughly to prepare 50 g of A liquid.
[0032] Step b: Weigh 1.5 g of ammonium persulfate and 0.1 g of ferrous sulfate, and dissolve them in 48.4 g of distilled water to prepare liquid B.
[0033] Step c: Pour the liquid A prepared in step a and the liquid B prepared in step b into a 100 ml separatory funnel, and then quickly open the separator valve, and the A and B liquids are fully mixed under stirring. Use the inverted cup method to test the setting time.
[0034] Table 3 shows that the gel setting time is related to the content of silica nanoparticles. As the silica content increases, the setti...
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Abstract
The invention discloses an organic inorganic nanometer composite hybrid waterproof leak stopping gel, and a preparation method thereof, and belongs to the technical field of municipal and building engineering new material. According to the preparation method, a silicon precursor is subjected to sol gel method so as to obtain an inorganic silicon network, at the same time, an acrylate is subjectedto double bond free radical polymerization reaction under the effect of a promoter and an initiator so as to generate a linear high molecular product; under the effect of a crosslinking agent, the linear high molecular product is subjected to crosslinking so as to obtain a gel body with a network structure, wherein the gel body is capable of absorbing water of the sizes of a plurality of times ofthe size of the gel body, is capable of swelling, and is not dissolved in water. The organic inorganic nanometer composite hybrid waterproof leak stopping gel is capable of improving gel water absorbing performance and strength, the problems in the prior art that single organic acrylate grouting material is low in compression strength, and cracking is easily caused are solved; at a drying and watering cycle environment, adhesion onto the surface of concrete is realized, shrinkage and peeling from concrete surface or fracture caused by water lose are prevented; re-swelling is realized after contact with water; leakage is not caused after long term cracking, shrinkage, and swelling circulation, and permanent leak stopping effect is achieved.
Description
technical field [0001] The invention relates to an organic-inorganic nanocomposite hybrid waterproof plugging gel and a preparation method thereof. It belongs to the category of new materials for municipal and construction projects, and the field of fine chemical technology. Background technique [0002] Due to the particularity of the environment, water leakage accidents are very likely to occur in underground projects. A large number of water leakage problems not only cause a lot of waste of energy and resources, but also affect the improvement of the image of the construction industry and the construction of a harmonious society. Long-term water leakage Destruction will reduce the service life of the engineering structure, and even endanger the safety of personnel and equipment during the operation period. Therefore, it is particularly important to use various methods and techniques to control the problem of water leakage. The grouting method is currently the best way to...
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