Adhesive Compositions with Graphenic Carbon Particles
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Solution Overview
Problem
Existing adhesive compositions face challenges in providing sufficient bond strength, ease of application, and long pot life for bonding various substrate materials, particularly in applications like wind turbine and automotive industries, where mechanical properties and rheological features are critical.
Innovation Solution
The development of one-component (1K) and two-component (2K) adhesive compositions that include graphenic carbon particles with a compressed density of 0.9 or less, which react upon activation by external energy sources or at ambient temperatures, respectively, enhancing mechanical properties and rheological features such as tensile modulus, shear thinning ratio, and Thixotropic Index.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional adhesive compositions are used, then bond strength is achieved, but rheological performance and ease of application are insufficient
Solution Approach 1:
The patent uses composite materials by incorporating graphenic carbon particles into the adhesive composition. This creates a composite adhesive system that combines the bonding properties of conventional adhesives with the rheological benefits of graphenic carbon particles, achieving both strong bonds and improved ease of application through enhanced shear thinning and viscosity recovery characteristics
2Duration of action of moving object
If adhesive compositions are designed for long pot life, then application time is extended, but bond strength may be compromised
Solution Approach 1:
The patent applies parameter changes by utilizing the temperature-dependent rheological properties of graphenic carbon particles. The adhesive maintains stable viscosity at ambient temperatures during storage and application (extending pot life), but exhibits enhanced flow characteristics at elevated temperatures during curing (ensuring bond strength), thus resolving the contradiction between pot life and bond strength
3Strength
If graphenic carbon particles with high compressed density are used, then mechanical strength is enhanced, but rheological performance deteriorates
Solution Approach 1:
The patent applies local quality by selecting graphenic carbon particles with specific localized properties - namely, low compressed density (0.9 g/cm³ or less). This local property optimization ensures that the particles provide adequate mechanical reinforcement while maintaining excellent rheological performance, including shear thinning and viscosity recovery characteristics essential for easy application
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 adhesive compositions demonstrate improved mechanical properties and rheological performance, including increased tensile modulus, higher shear thinning ratios, and enhanced viscosity recovery, making them suitable for demanding applications like wind turbines and automotive components.
Implementation Method 1
adhesive compositions comprising graphenic carbon particles
Implementation Method 2
enhancing mechanical properties and rheological features such as tensile modulus, shear thinning ratio, and Thixotropic Index
Implementation Method 3
a second component that chemically reacts with the first component
Data Source
Figure 1
Figure 2
AI summary
Disclosed herein are adhesive compositions comprising (a) a first component; (b) a second component that chemically reacts with said first component; and (c) graphenic carbon particles having a compressed density of 0.9 or less. Disclosed herein are associated methods for forming the adhesive compositions and applying the adhesive compositions to a substrate to form a bonded substrate.