Reduced Graphene Oxide Nitrile Rubber for Heat-Resistant Tooth Blocks
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Solution Overview
Problem
Existing nitrile rubber used in drill tongs suffers from reduced mechanical properties due to thermal oxidation aging and poor interface compatibility with fillers, leading to wear and failure of drilling tools.
Innovation Solution
A reduced graphene oxide nitrile rubber composition with specific components and a manufacturing process that includes mixing reduced graphene oxide masterbatch with nitrile rubber to enhance mechanical properties and interface compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nitrile rubber is used as protective tooth block in drill tongs, then oil resistance is provided, but mechanical properties such as hardness and tensile strength are reduced after thermal oxidation aging
Solution Approach 1:
The patent uses reduced graphene oxide as a filler to create a composite rubber material. The reduced graphene oxide forms a three-dimensional network structure within the nitrile rubber matrix, providing reinforcement that maintains mechanical properties even after thermal oxidation aging. This composite approach allows the material to simultaneously achieve high temperature resistance, aging resistance, and preserved strength.
Solution Approach 2:
The patent modifies the chemical structure of graphene oxide by reducing it to reduced graphene oxide, changing its electrical conductivity, mechanical strength, and thermal stability parameters. This parameter change transforms graphene oxide from a material with limited practical application to one that can effectively reinforce rubber and maintain mechanical properties under thermal stress.
2Adaptability or versatility
If conventional nitrile rubber is used in high temperature environment, then basic sealing function is achieved, but excessive cross-linking occurs reducing mechanical properties
Solution Approach 1:
The reduced graphene oxide forms a stable three-dimensional network structure that acts as a physical barrier and reinforces the rubber matrix. This network structure prevents excessive cross-linking of rubber molecules at high temperatures, maintaining the material's mechanical behavior while allowing it to function in high temperature environments.
Solution Approach 2:
The reduced graphene oxide acts as an intermediary between the rubber molecules and the thermal environment. It absorbs and disperses thermal energy, preventing direct thermal degradation of the rubber polymer chains and controlling the cross-linking process to maintain mechanical properties.
3Strength
If filler is added to nitrile rubber to improve mechanical properties, then strength increases, but interface compatibility problems occur between filler and rubber
Solution Approach 1:
The patent changes the surface properties of graphene oxide through reduction, altering its electrical conductivity, hydrophobicity, and surface energy. These parameter changes improve the interfacial compatibility between the filler and the non-polar nitrile rubber matrix, ensuring strong adhesion and uniform stress distribution throughout the composite material.
Solution Approach 2:
The reduced graphene oxide serves as an intermediary that bridges the polar graphene structure and the non-polar rubber matrix. The reduction process creates a surface chemistry that is more compatible with hydrocarbon-based polymers, facilitating strong interfacial bonding and preventing filler-rubber separation.
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 resulting tooth-scar-free tooth blocks exhibit improved mechanical properties, temperature resistance, and enhanced filler-rubber compatibility, reducing wear and extending the lifespan of drilling tools.
Implementation Method 1
The reduced graphene oxide forms a three-dimensional network structure in the nitrile rubber, improving the interface compatibility between the filler and the rubber
Implementation Method 2
enhanced filler-rubber compatibility
Implementation Method 3
the high temperature environment will accelerate the aging process of the nitrile rubber, which will cause the rubber to be excessively cross-linked and reduce the hardness, tensile strength and other properties
Implementation Method 4
The reduced graphene oxide forms a three-dimensional network structure in the nitrile rubber
Data Source
AI summary
Disclosed is a reduced graphene oxide nitrile rubber, comprising the following components in parts by weight: 100-140 parts of nitrile rubber, 30-90 parts of a reduced graphene oxide nitrile rubber masterbatch, 1.8-2.52 parts of a vulcanizing agent, 1.2-1.68 parts of a vulcanization accelerator, 5-7 parts of a vulcanization activator, 17-23.8 parts of a plasticizer, 2-2.8 parts of antioxidant, 59-86.6 parts of a filler, 0.1-0.14 parts of a curing agent, and 2-2.8 parts of dichlorophenol. The reduced graphene oxide nitrile rubber has excellent mechanical properties, a wide applicable temperature range, and strong stability in use, which excellently addresses the poor mechanical properties of the nitrile rubber in the prior art due to high temperature in use and the interfacial compatibility issue between the filler and the rubber.