Preparation method and preparation device of cationic electromigration imidazoline concrete reinforcing bar corrosion inhibitor
The invention relates to a technology of concrete reinforcement and imidazoline, which is applied in the field of preparation of a cationic electromobility imidazoline-based concrete reinforcement rust inhibitor, and can solve the problems of low diffusivity of the rust inhibitor, dangerous secondary corrosion, non-destructive repair, and the like. To achieve the effect of not affecting the appearance, avoiding secondary corrosion, and low cost
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Embodiment 1
[0033] Such as figure 1 As shown, the device for preparing cationic electromobility imidazoline series concrete steel reinforcement rust inhibitor in this embodiment includes an iron frame platform 6, a three-necked flask 3, a collector type constant temperature heating magnetic stirrer 1, and also includes a water separator 4 and a condenser. Device 5; the first flask mouth of the three-necked flask 3 is connected with one end of the water separator 4, and the condenser 5 is arranged on the water separator 4 and connected with the other end of the water separator 4; the three-necked flask 3 The mouth of the second flask is a nitrogen gas inlet 10, which is connected with the nitrogen gas supply pipe, and the mouth of the third flask of the three-necked flask 3 is sealed; xylene is housed in the water separator 4, and the liquid level of xylene is lower than the water divider The lower end of the elbow protrudes 5mm from the device.
[0034] The method for preparing cationic ...
Embodiment 2
[0056] This embodiment adopts the same device for preparing cationic electromobility imidazoline series concrete steel reinforcement rust inhibitor as in the embodiment, and the steps of the preparation method are as follows:
[0057] (1) Using lauric acid and diethylenetriamine at a molar ratio of 1.2:1, acylation reaction at 170°C for 3 hours, followed by cyclization reaction at 200°C for 15 hours, to synthesize imidazoline; into nitrogen.
[0058] (2) The molar ratio of imidazoline and epichlorohydrin is 1.0:1.0, and the cationic reaction is carried out at a temperature of 90 ° C and a pH value of 4. During the reaction, nitrogen gas is introduced, and the reaction time is 7 hours to obtain a cationic Electromigratory imidazoline-based concrete steel reinforcement rust inhibitor has the following molecular structure:
[0059]
[0060] Among them, R, R'represent CH 3 (CH 2 ) 10 -, -CH 2 CH 2 NHCO (CH 2 ) 10 CH 3 .
[0061] The infrared spectrogram of the imidazo...
Embodiment 3
[0064] This embodiment adopts the same device for preparing cationic electromobility imidazoline series concrete steel reinforcement rust inhibitor as in the embodiment, and the steps of the preparation method are as follows:
[0065] (1) Using lauric acid and diethylenetriamine at a molar ratio of 1:1.1, acylation reaction at 150°C for 4 hours and cyclization reaction at 210°C for 17 hours were used to synthesize imidazoline; into nitrogen.
[0066] (2) The molar ratio of imidazoline and ethylene oxide is 1:1.1, and the cationization reaction is carried out at a temperature of 70 ° C and a pH value of 3 to 4. During the reaction, nitrogen gas is introduced, and the reaction time is 8 hours. Cationic electromobility imidazoline series concrete steel reinforcement corrosion inhibitor, with the following molecular structure:
[0067]
[0068] Among them, R, R'represent CH 3 (CH 2 ) 10 -, -CH 2 CH 2 NHCO (CH 2 ) 10 CH 3 .
[0069] The infrared spectrogram of the imid...
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