Graphene-Carbon Black Pellets for Low-Dust Rubber Reinforcement
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Solution Overview
Problem
Existing carbon black grades in tire production face limitations in simultaneously improving rolling resistance, wet traction, and wear resistance, and the use of functionalized polymers is costly and impractical.
Innovation Solution
Co-pelletization of graphene with carbon black to enhance dispersion and uniformity in a rubber compound, which addresses potential concerns of dust and industrial hygiene, and enhances the properties of carbon black without negating the range of compound design variables required in the end-product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If functionalized polymers are used to improve rolling resistance, wet traction, and wear resistance, then the mechanical properties are improved, but the cost increases significantly and practical application becomes difficult
Solution Approach 1:
The patent changes the chemical composition parameters of the polymer by introducing specific functional groups (carboxyl, hydroxyl, amino groups) through chemical modification. This transforms conventional polymers into functionalized polymers that can chemically bond with carbon black, thereby improving mechanical properties like rolling resistance, wet traction, and wear resistance without requiring expensive specialized materials
Solution Approach 2:
The patent creates a composite material system where functionalized polymers are combined with carbon black fillers. The chemical bonding between the functional groups on the polymer chains and the carbon black surface creates a synergistic effect that enhances mechanical properties while maintaining cost-effectiveness through the use of readily available base polymers and carbon black
2Temperature
If graphene is added to rubber compound to enhance properties, then thermal and electrical conductivity improve, but dust generation creates industrial hygiene concerns
Solution Approach 1:
The patent uses functionalized polymers as an intermediary carrier to deliver graphene to the rubber compound. Instead of adding raw graphene powder directly, the graphene is incorporated into the functionalized polymer matrix, which then distributes it uniformly throughout the rubber compound during mixing. This intermediary approach eliminates dust generation during handling while maintaining the thermal and electrical conductivity benefits
3Strength
If carbon black is used to improve mechanical properties and processing, then compound performance is enhanced, but the ability to simultaneously improve rolling resistance, wet traction, and wear resistance is limited
Solution Approach 1:
The patent modifies the chemical parameters of the polymer matrix by introducing functional groups that can interact with carbon black. This chemical modification enables the rubber compound to achieve multiple performance improvements simultaneously - reduced rolling resistance through improved hysteresis, enhanced wet traction through better filler-polymer bonding, and improved wear resistance through strengthened network structure
Solution Approach 2:
The patent creates a multi-functional composite system where functionalized polymers and carbon black work synergistically. The chemical bonding between functional groups and carbon black surface creates a reinforced network that simultaneously addresses multiple performance requirements, expanding the performance envelope beyond what conventional carbon black alone can achieve
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 co-pelletization of graphene with carbon black improves thermal and electrical conductivity, abrasion resistance, reduces permeability, and enhances mechanical properties without affecting processing, leading to reduced hysteresis and improved tire air pressure retention.
Implementation Method 1
improves thermal and electrical conductivity
Implementation Method 2
improves thermal and electrical conductivity
Implementation Method 3
Co-pelletization of graphene with carbon black to enhance dispersion and uniformity
Data Source
AI summary
The addition of graphene to the pelletizing of carbon black during carbon black's manufacturing can allow a higher level of dispersion and exfoliation of the graphene when carbon black is compounded in rubber. This is applicable to pelletization of all grades of carbon black with all classes of graphene such as graphene oxide, reduced graphene oxide, and pure graphene, and which any graphene organic functionality will have minimal effect. Amounts of graphene incorporated into the carbon black pellets will be from about 0.01 weight percent to about 30 weight percent, including as an example, between about 0.03 and about 6 weight percent. The use of carbon black as a carrier will mitigate graphene dusting (safety benefits), maximize dispersion in a rubber compound (processing benefits), and facilitate full attainment of rubber compound material properties through the inclusion of graphene (performance benefits).