A kind of preparation method of chitosan-based cationic gemini asphalt emulsifier
An asphalt emulsifier, cationic technology, used in building components, building insulation materials, buildings, etc.
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Embodiment 1
[0019] Emulsifier preparation: 16.1g (0.1mol) chitosan and 48.0g water were added to the reaction device, stirred and dissolved at 150rpm, and 8.71g (0.05mol) of ethylene glycol diglycidyl ether was added dropwise at 75°C, controlled The dropping rate is 1 drop / 2 seconds, and the reaction is refluxed for 5 hours after the dropping. After the reaction, the water is removed by centrifugation to obtain a flocculent solid substance, that is, a chitosan-based cationic gemini asphalt emulsifier, and the product yield is 96.2%.
[0020] Preparation of emulsifier aqueous solution: Dissolve 4.0 g of the emulsifier into 160 g of hot water at about 75° C., add an appropriate amount of concentrated hydrochloric acid to adjust the pH of the solution to 3-4, and obtain an emulsifier aqueous solution.
[0021] Asphalt emulsion preparation: Start the colloid mill, add the above-mentioned emulsifier aqueous solution at about 75°C to the colloid mill for saponification, then continuously add pet...
Embodiment 2
[0027] Emulsifier preparation: Add 16.1g (0.1mol) chitosan and 48.0g water into the reaction device, stir and dissolve at 150rpm, add 5.1g (0.025 mol), the control rate of addition is 1 drop / 3 seconds, the dropwise addition is completed and the reflux reaction is 6h. After the reaction is completed, the water is removed by centrifugation to obtain a flocculent solid substance, that is, to obtain a chitosan-based cationic gemini bituminous emulsifier, and the product yield is 93.7 %.
[0028] Preparation of emulsifier aqueous solution: preparation by referring to the method in Example 1.
[0029] Preparation of bitumen emulsion: prepared according to the method in Example 1.
Embodiment 3
[0036] Emulsifier preparation: 16.1g (0.1mol) chitosan and 48.0g water were added to the reaction device, stirred and dissolved at 150rpm, and 5.8g (0.05 mol), control the dropping speed to be 1 drop / 4 seconds, drop and complete the reflux reaction for 8h, and centrifuge to remove water after the reaction, to obtain flocculent solid matter, that is, to obtain the chitosan-based cationic gemini asphalt emulsifier, and the product yield is 93.5 %.
[0037] Preparation of emulsifier aqueous solution: preparation by referring to the method in Example 1.
[0038] Preparation of bitumen emulsion: prepared according to the method in Example 1.
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