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Method for preparing polystyrene/sodium monofluorophosphate microcapsule corrosion inhibitor

A technology of sodium monofluorophosphate and polystyrene, which is applied in the field of concrete steel rust inhibitor, can solve the problems of slow penetration speed, lower concentration, and lower anti-rust effect, and achieve the effect of avoiding impact and improving water resistance

Inactive Publication Date: 2013-04-03
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] MFP is a substance that is easily soluble in water. Rainwater or other "harmful ions" in the environment can cause the loss of MFP; in addition, the MFP solution is mainly applied by brushing on the concrete surface, and it can only be applied from the surface of concrete components. Infiltrating into the inside, as the infiltration process proceeds, the concentration of MFP is also decreasing due to diffusion, so that the osmotic pressure gradually decreases, and the infiltration speed becomes slower, which further reduces the anti-rust effect

Method used

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  • Method for preparing polystyrene/sodium monofluorophosphate microcapsule corrosion inhibitor
  • Method for preparing polystyrene/sodium monofluorophosphate microcapsule corrosion inhibitor
  • Method for preparing polystyrene/sodium monofluorophosphate microcapsule corrosion inhibitor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Raw materials:

[0038] Rust inhibitor: sodium monofluorophosphate (toothpaste grade, Hubei Xingfa Chemical Group Co., Ltd.): 80g;

[0039] Emulsifier: Tween 80 (chemically pure, Guangdong Yueqiao Reagent Plastic Co., Ltd.): 0.2g;

[0040] Protective colloid: polyethylene glycol (chemically pure, Shanghai Yili Biotechnology Co., Ltd.): 2 g,

[0041] Microcapsule shell material: polystyrene resin (5250, Taiwan Taihua): 20g;

[0042] PS solvent: dichloromethane (chemically pure, Guangdong Guanghua Chemical Factory Co., Ltd.), 180 g;

[0043] distilled water.

[0044] 2. Equipment:

[0045] Constant temperature water bath, stirrer, three-neck flask

[0046] Preparation Process:

[0047] 1) Make 80 g of sodium monofluorophosphate into a saturated aqueous solution of sodium monofluorophosphate, then add 0.2 g of Tween 80, stir and dissolve, and make an aqueous phase.

[0048] 2) Dissolving 20g of polystyrene in 180g of methylene chloride to make an oil phase, the t...

Embodiment 2

[0054]1. Raw materials:

[0055] Rust inhibitor: sodium monofluorophosphate (toothpaste grade, Hubei Xingfa Chemical Group Co., Ltd.): 80g;

[0056] Emulsifier: sodium lauryl sulfate: (chemically pure,) 0.1g;

[0057] Protective colloid: polyethylene glycol: (chemically pure, Shanghai Yili Biotechnology Co., Ltd.): 2 g;

[0058] Microcapsule shell material: polystyrene resin (5250, Taiwan Taihua): 30 g;

[0059] PS solvent: chloroform (chemically pure, Guangdong Guanghua Chemical Co., Ltd.), 180 g;

[0060] distilled water.

[0061] 2. Equipment:

[0062] Constant temperature water bath, stirrer, three-neck flask

[0063] Preparation Process:

[0064] 1) Make 80g of sodium monofluorophosphate into a saturated aqueous solution of sodium monofluorophosphate, add 0.5g of Tween 80, stir and dissolve, and make an aqueous phase;

[0065] 2) Dissolving 30g of polystyrene in 180g of chloroform to make an oil phase, the temperature of the water bath is 60°C.

[0066] 3) Mix the...

Embodiment 3

[0071] 1. Raw materials:

[0072] Rust inhibitor: sodium monofluorophosphate (toothpaste grade, Hubei Xingfa Chemical Group Co., Ltd.): 80g;

[0073] Emulsifier: Tween 80 (chemically pure, Guangdong Yueqiao Reagent Plastic Co., Ltd.): 1g;

[0074] Protective colloid: polyvinyl alcohol (chemically pure, Shanghai Yili Biotechnology Co., Ltd.): 6 g,

[0075] Microcapsule shell material: polystyrene resin (5250, Taiwan Taihua): 40g;

[0076] PS solvent: dichloromethane (chemically pure, Guangdong Guanghua Chemical Factory Co., Ltd.), 180 g;

[0077] distilled water.

[0078] 2. Equipment:

[0079] Constant temperature water bath, stirrer, three-neck flask

[0080] Preparation Process:

[0081] 1) Make 80 g of sodium monofluorophosphate into a saturated aqueous solution of sodium monofluorophosphate, add 1 g of Tween 80, stir and dissolve, and make an aqueous phase.

[0082] 2) Dissolving 40g of polystyrene in 180g of dichloromethane to make an oil phase, the temperature of ...

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Abstract

The invention discloses a method for preparing a polystyrene / sodium monofluorophosphate microcapsule corrosion inhibitor, which comprises the following steps of preparing the sodium monofluorophosphate into water solution of sodium monofluorophosphate, adding emulgator and stirring for dissolution so as to prepare water phase, dissolving the polystyrene into PS (poly styrene) solvent to prepare oil phase, mixing the water phase and the oil phase for preparing W / O type emulsion, preparing protective colloid into water solution, adding the water phase into the prepared W / O type emulsion and stirring for mixing to obtain W / O / W complex phase emulsion, taking the mixed liquid out for standing and taking out a sediment layer after full volatilization of PS solvent, washing the precipitated particles with water, after sedimentation and filtration, drying in a vacuum drying box, thus obtaining the polystyrene / sodium monofluorophosphate microcapsule corrosion inhibitor particles. The polystyrene / sodium monofluorophosphate microcapsule corrosion inhibitor prepared by the method has good water resistance performance, can reduce the effect of external effect and additives, can be directly mixed into the cement or coated on the rebar of cement, and is contributed to improving the durability of the reinforced cement, and the size of the particle is convenient to regulate.

Description

[technical field] [0001] The invention relates to a concrete steel bar rust inhibitor, in particular to a preparation method of a polystyrene / sodium monofluorophosphate microcapsule rust inhibitor. [Background technique] [0002] In recent years, with the development of large-scale infrastructure construction in our country, the country has paid more and more attention to the durability of important projects. Steel corrosion is the most important factor affecting the durability of reinforced concrete in today's world. With the increasing number of seaside buildings, the Cl contained in seawater - , SO42 - Plasma causes erosion and damage to concrete structures, accelerates the corrosion of steel bars and causes early damage to structures. The "sea sand house" phenomenon in coastal areas and the corrosion of steel bars caused by spraying deicing salt on roads and bridges in northern areas have long attracted widespread attention. [0003] Our country has begun to re-recog...

Claims

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Application Information

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IPC IPC(8): C04B24/26C04B22/16C04B103/61
Inventor 左建东罗超云董必钦余君燕赵雷邢峰
Owner SHENZHEN UNIV
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