Asphalt Microcapsule with Graphene Wall for Self-Healing
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Solution Overview
Problem
Asphalt pavements face poor aging resistance and snow/ice resistance, leading to reduced service life and increased maintenance costs, particularly in high-traffic areas, due to the lack of effective self-healing and conductive properties in existing microcapsules.
Innovation Solution
The development of an asphalt restoration agent microcapsule with a capsule core containing asphalt regenerant and a capsule wall made of graphene and hexamethoxymethylmelamine resin, where the graphene improves electrical conductivity and stability, allowing for enhanced self-healing and ice-snow resistance when added to asphalt mixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional asphalt regenerants are used for compensating asphaltene micromolecules, then restoration capacity is improved, but penetration depth is limited to not over 2 cm
Solution Approach 1:
The invention divides the restoration system into microcapsule units that can be dispersed throughout the asphalt layer. These microcapsules break upon cracking and release regenerants locally, ensuring both adequate penetration depth and effective restoration capacity at multiple locations within the asphalt structure.
Solution Approach 2:
The microcapsule structure acts as an intermediary carrier that enables the asphalt regenerants to be dispersed in droplet form throughout the asphalt. This intermediary system allows the regenerants to be distributed beyond the limited 2 cm penetration depth of direct application methods.
2Reliability
If microencapsulation technology is used to disperse restoration agents in droplet form, then restoration capacity is improved, but manufacturing complexity increases
Solution Approach 1:
The invention optimizes microcapsule parameters including size distribution, wall thickness, and core material composition to achieve effective restoration while simplifying manufacturing. The microcapsules are designed with specific physical and chemical parameters that enable easy integration into existing asphalt mixing processes.
3Object-affected harmful factors
If graphene is added to improve electrical conductivity, then ice-snow resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The invention merges multiple functions into a single microcapsule system: the capsule wall provides structural integrity and controlled release, while embedded conductive materials like graphene provide electrical conductivity for ice-snow resistance. This integration achieves multiple benefits without requiring separate manufacturing processes for each function.
Solution Approach 2:
The microcapsule structure employs composite materials combining polymer wall materials with conductive fillers such as graphene. This composite approach enables simultaneous achievement of mechanical properties, controlled release characteristics, and electrical conductivity, thereby improving ice-snow resistance while managing manufacturing complexity through material integration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The microcapsule effectively prolongs the service life of asphalt pavements by releasing asphalt regenerants to compensate for aging, while the graphene enhances electrical and heat conductivity, reducing ice adhesion and maintenance costs, ensuring safer and more durable road surfaces.
Implementation Method 1
the capsule walls break to release the capsule cores to compensate for components of the asphalt that are lost due to aging
Implementation Method 2
the graphene enhances electrical conductivity
Implementation Method 3
the graphene enhances electrical and heat conductivity
Implementation Method 4
The asphalt restoration agent microcapsule provided by the present invention has low electrical resistivity and good stability
Data Source
AI summary
The present invention relates to the field of road restoration, and discloses an asphalt restoration agent microcapsule and a preparation method and use thereof. The asphalt restoration agent microcapsule includes a capsule core containing an asphalt regenerant and a capsule wall wrapping the capsule core and containing graphene and hexamethoxymethylmelamine resin, wherein a mass ratio of the graphene to the hexamethoxymethylmelamine resin is 0.1:100-7:100, and a mass ratio of the asphalt regenerant to the hexamethoxymethylmelamine resin is 1:1-1:4. The preparation method provided by the present invention adopts specific steps and specific material adding sequences, so that the asphalt restoration agent microcapsule prepared through the preparation method has better stability and electrical conductivity and can be added to asphalt mixtures to prolong the service life of asphalt pavements.