Chemically Modified Cellulose Rubber Composition
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Solution Overview
Problem
Current rubber compositions for tires face challenges in achieving both excellent breaking properties and low energy loss while being environmentally friendly, with existing methods struggling to improve rolling resistance and durability effectively.
Innovation Solution
A rubber composition incorporating chemically modified microfibrillated cellulose with a specific substituent structure and carbon black, which enhances dispersibility and compatibility, thereby improving the interface strength and reducing energy loss, and utilizing natural rubber and other diene rubbers to achieve better mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If cellulose is dispersed in water and dried, then cellulose aggregates form, but this prevents effective dispersion at the nano level during mixing with rubber
Solution Approach 1:
The patent applies parameter changes by chemically modifying the cellulose surface through acetylation, changing its hydrophilic properties to hydrophobic. This parameter change allows the cellulose to be effectively dispersed in the hydrophobic rubber matrix without aggregating, thereby improving both dispersibility and breaking strength simultaneously
Solution Approach 2:
The patent creates a composite material system by combining chemically modified cellulose (with improved compatibility) and rubber. The chemical modification creates a composite structure at the molecular level that enhances interfacial adhesion and prevents aggregation, solving the contradiction between dispersibility and strength
2Stability of the object's composition
If conventional cellulose treatment is used to disperse cellulose, then dispersibility improves, but the type of rubber is limited to latex only
Solution Approach 1:
The patent changes the chemical parameter of cellulose by introducing acetyl groups, transforming it from hydrophilic to hydrophobic. This parameter change enables compatibility with various hydrophobic rubber types beyond just latex, thereby improving both dispersibility and adaptability to different rubber systems
Solution Approach 2:
The patent applies local quality by modifying only the surface properties of cellulose through acetylation while maintaining its bulk structure. This localized modification allows the cellulose to interact effectively with hydrophobic rubber matrices, expanding versatility across different rubber types without altering the fundamental cellulose structure
3Strength
If short fiber cellulose is used to improve handling stability, then elastic modulus improves, but other properties required for tires are not necessarily improved
Solution Approach 1:
The patent changes the chemical composition parameter of cellulose through acetylation, which improves not only elastic modulus but also adhesion to rubber, abrasion resistance, and rolling resistance properties. This comprehensive parameter change addresses multiple performance requirements simultaneously rather than just elastic modulus
Solution Approach 2:
The patent creates an optimized composite material system where chemically modified cellulose works synergistically with rubber to improve multiple properties including handling stability, adhesion, abrasion resistance, and rolling resistance. The composite structure ensures that all tire performance requirements are met, not just elastic modulus
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 rubber composition achieves enhanced breaking strength, reduced energy loss, and improved rolling resistance, making it suitable for environmentally friendly tire applications with improved durability and fuel economy.
Implementation Method 1
a chemically modified microfibrillated cellulose, wherein part of the hydroxyl hydrogen atoms of the microfibrillated cellulose is replaced with a substituent
Data Source
AI summary
Provided are a rubber composition that is environmentally friendly and achieves both excellent breaking properties and low energy loss, and a tire that includes a component prepared using the same and is environmentally friendly and excellent in rolling resistance properties and durability. The present invention provides a rubber composition containing a rubber component, a specific chemically modified microfibrillated cellulose, and carbon black.