Preparation method of pavement material self-repairing microcapsule

Abstract

The invention discloses a pavement material self-repairing microcapsule and a preparation method thereof, wherein the pavement material self-repairing microcapsule is prepared from the following raw materials by weight percentage: 4%-6% of gelatin, 4%-6% of gum Arabic, 8%-12% of epoxy resin, 25-35% of an emulsifying agent, 6%-10% of methanal, 1%-5% of a pH modifying agent and 40%-50% of water, and the sum of the percentages of the raw materials is 100%. The preparation method comprises the following steps of: mixing components of capsule walls and capsule cores; keeping the temperature at 60-80 DEG C and reacting for 3-6 hours; modifying the pH of the system to be 2-4 by using the pH modifying agent; continuously reacting for 30-60 minutes at the previous temperature; then adding a formula amount of the methanal into the system; continuously reacting for 2-3 hours; then modifying the pH of the system to be 8-10 by using the pH modifying agent; and standing and demixing the solution, and freezing and drying precipitates to obtain the microcapsule. The pavement material self-repairing microcapsule has a wide material source, waste and scrap leather is effectively utilized, the cost can be reduced, and the microcapsule also has good environmental and economic benefits.

Description

Technical field [0001] The invention belongs to the field of functional materials for energy and chemical engineering, and specifically relates to a preparation method of self-repairing microcapsules for pavement materials. Background technique [0002] Expressway is a kind of high-grade highway, which refers to the highway that can adapt to the annual average day and night traffic volume of more than 25,000 small passenger cars, and is dedicated to the high-speed driving of cars in separate lanes and fully controlled access. At present, China's highway mileage ranks first in the world. As of 2012, the existing domestic highway mileage has reached 96,000 kilometers, which is an increase of 11,000 kilometers over 2011. At present, the construction of national railways has slowed down significantly, and the number of domestic vehicles continues to rise, which determines that the domestic expressway industry will continue to maintain a rapid development momentum. Although the amoun...

AI Technical Summary

Problems solved by technology

Because leather products will produce toxic compounds during chemical processing, and the cost of removing these compounds is very high, it is difficult to completely remove toxic compounds. Once there are residues, they will eventually be transferred to hydrolyzed protein and absorbed by the human body, which will cause poisoning, joint swelling

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