Organic silicon nano-precursor medium transmission inhibitor, its preparation method and use

Abstract

The present disclosure discloses an organic silicon nano-precursor medium transmission inhibitor and its preparation method and use. The organic silicon nano-precursor medium transmission inhibitor is composed of an organic silicon and its derivatives, a catalyst, a dispersant, a stabilizer, a surfactant, and water. The organic silicon nano-precursor medium transmission inhibitor in-situ generates nanoparticles during a hydration process. The nanoparticles not only have a hydrophobic function, but also can effectively fill the pores of the concrete, which effectively solves a problem in which a hydrophobic material in a state of full water cannot reduce the diffusion of an erosive medium. The problems such as uneven dispersion and poor stability of nanoparticles added can be effectively solved by in-situ generating the nanoparticles, thereby effectively improving the ion corrosion resistance performance of the concrete.

Claims

1. An organic silicon nano-precursor medium transmission inhibitor, consisting of an organic silicon and its derivatives, a catalyst, a dispersant, a stabilizer, a surfactant, and water, which have following parts by weight: the organic silicon and its derivatives: 2-70 parts, the catalyst: 0.01-10 parts, the dispersant: 0.01-10 parts, the stabilizer: 0.01-5 parts, and the water: 30-95 parts; wherein the organic silicon and its derivatives are compounds have a linear or branch chain structure with 1 silicon atom to 1,000 silicon atoms, and the compounds have a molecular weight of 100-100000, and wherein the compounds are selected from silicate ester, alkyl silicate, alkyl siloxane, alkenyl siloxane, and alkyl siloxane with a functional heteroatom or polysiloxane with a functional heteroatom; wherein the catalyst does not initiate a reaction in a neutral environment, and initiates a reaction after the organic silicon nano-precursor medium transmission inhibitor is blended into a concrete, and wherein the catalyst is any one of phenol and its derivatives, benzoquinone and its derivatives, guanidine and its derivatives, and small molecule alcohol amine with a molecular weight of 50-1000; wherein the dispersant is a polymer dispersant formed by any one or two of acrylic acid and its derivatives, maleic acid and its derivatives, fumaric acid and its derivatives; and wherein the stabilizer is polysaccharide, chitosan, cellulose ether, polyamide, or polypyrrolidone.

2. The organic silicon nano-precursor medium transmission inhibitor according to claim 1, wherein a surfactant is further added to the organic silicon nano-precursor medium transmission inhibitor; wherein the surfactant is a cationic surfactant, an anionic surfactant and a non-ionic surfactant, the surfactant has a HLB value of 5-14, and the surfactant is selected from a combination consisting of any one or more of anhydrosorbitol fatty acid ester, polyoxyethylene anhydrosorbitol fatty acid ester, isomeric alcohol ether, alkyl carboxylate, alkyl sulfonate, and alkyl quaternary ammonium salt in any proportion.

3. The organic silicon nano-precursor medium transmission inhibitor according to claim 2, wherein the surfactant is a mixture of one or two of anhydrosorbitol fatty acid ester, alkyl carboxylate, and alkyl quaternary ammonium salt.

4. The organic silicon nano-precursor medium transmission inhibitor according to claim 1, wherein the organic silicon and its derivatives are -aminopropyl siloxane, silane oligomer, and allyl triethoxy silane.

5. The organic silicon nano-precursor medium transmission inhibitor according to claim 1, wherein the catalyst is phosphoguanidine or p-benzoquinone.

6. The organic silicon nano-precursor medium transmission inhibitor according to claim 1, wherein the dispersant has a molecular weight of 1000-40000.

7. A method for preparing the organic silicon nano-precursor medium transmission inhibitor according to claim 1, comprising following steps: adding the organic silicon and its derivatives and the dispersant to a reactor to heat to 10-200 C.; adding the surfactant as required while stirring for 1-24 h; adding the catalyst, the stabilizer and the water while further stirring for 1-24 h, to obtain the organic silicon nano-precursor medium transmission inhibitor.

Description

DESCRIPTION OF EMBODIMENTS

(1) In order to better explain the beneficial effects of the present disclosure, the present disclosure is analyzed by Examples. Six samples of Examples are prepared, and the better Dow SHP 60 on the market is selected to perform a comparative research through concrete performance and dielectric transmission resistant performance test.

(2) The proportions of specific Examples S1-S6 can be referred to Table 1 to be continued and continued Table 1

(3) TABLE-US-00001 TABLE 1 Proportion of the sample Sodium fumaric acid polyacrylate polymer silane allyl (Molecular (Molecular -aminopropyl oligomer triethoxy weight, weight, Sampel siloxane (QX-1270) silane phosphoguanidine p-benzoquinone 10000~20000) 1000~3000) S1 10 0.5 10 S2 50 0.02 5 S3 30 0.2 0.5 S4 40 0.5 2 S5 70 1 2 S6 6 0.01 10 Polypyrrolidone (Molecular weight, Dodecyl trimethyl cellulose 2000~4000) chitosan Span 80 ammonium chloride ether water 1 0.1 78.5 5 1.2 38.78 0.1 3 66.3 0.1 0.2 57.2 0.9 3.0 23.1 0.02 0.2 83.77

(4) Table 1 is the proportions of the samples prepared. Through different combinations of compositions and proportions, the nano-precursor with stable performance is prepared, and then is blended into a concrete, the proportions of the concrete can be seen from Table 2.

(5) TABLE-US-00002 TABLE 2 Proportions of the concrete kg/m.sup.3 Fly Small Big ash Mineral Sand stone stone Water Medium Hailuo PO Grad powder River Basalt Basalt Tap transmission Types of No. 42.5 I S95 sand 5-10 10-20 water inhibitor samples 1 270.8 125.2 21.2 648.8 506.8 507.6 146.8 / / 2 270.8 125.2 21.2 648.8 506.8 507.6 146.8 5 S1 3 270.8 125.2 21.2 648.8 506.8 507.6 146.8 15 S2 4 270.8 125.2 21.2 648.8 506.8 507.6 146.8 6 S3 5 270.8 125.2 21.2 648.8 506.8 507.6 146.8 6 S4 6 270.8 125.2 21.2 648.8 506.8 507.6 146.8 3 S5 7 270.8 125.2 21.2 648.8 506.8 507.6 146.8 40 S6 8 270.8 125.2 21.2 648.8 506.8 507.6 146.8 3 SHP 60

(6) The influences of different samples on the workability, mechanical properties, hydrophobic properties and chloride ion diffusion resistance of the concrete were compared and studied. The water absorption rate was tested by referring to BS1882, and the chloride ion diffusion coefficient was tested by referring to RCM method of the electromigration chloride ion diffusion coefficient in GB50082 Test Method for Long-Term Durability of Ordinary Concrete. The test results were shown in Table 3.

(7) TABLE-US-00003 TABLE 3 Influence of different samples on performance of the concrete Gas Bulk Water diffusion coefficient content density Slump Extension Strength/MPa absorption of chloride ion No. % kg/m3 mm Mm 7 28 56 7 d 28 d 1 3.5 20.380 210 730 40.2 50.7 58.5 1.98 6.64 2 3.0 20.380 220 690 41.2 54.7 60.5 0.67 6.21 3 2.1 20.570 241 685 42.6 55.6 59.9 0.52 4.71 4 2.3 20.560 220 705 44.0 61.4 65.8 0.50 4.98 5 1.3 20.610 225 675 43.8 61.8 63.0 0.37 4.35 6 1.5 20.585 232 700 43.4 60.3 65.0 0.42 5.67 7 1.5 20.64 242 695 45.6 66.2 71.1 0.45 5.19 8 1.0 20.60 220 660 40.9 59.2 64.6 0.73 6.69

(8) The test results show that the addition of organic silicon nano-precursor medium transmission inhibitor has little impact on the working performance and mechanical properties of concrete, and can effectively reduce the water absorption rate of concrete. Compared with the same type of organic silicon waterproof agent, the hydrophobic property is stronger, even under the state of full water, it can significantly reduce the chloride ion diffusion coefficient and enhance the ion erosion resistance of concrete.