Functionalized Graphene with Monovalent and Bivalent Amines

Solution Overview

Problem

Conventional functionalized graphene with either monovalent or bivalent amines faces challenges such as poor kneadability and dispersibility with various solvents and resins, requiring specific solvents and resins, and involves high production costs and catalyst use, limiting its applications.

Innovation Solution

Functionalized graphene with both monovalent and bivalent amine groups chemically bonded to carbon materials like graphene or graphene oxide, providing amphiphilic properties for improved kneadability and dispersibility across a range of solvents and resins, achieved through a specific preparation method involving mixing amine solutions with carbon material dispersions and controlled molar ratios.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If monovalent amine alone is used to prepare functionalized graphene, then the preparation process is simple, but the amine functional group is not bonded to the graphene surface and alkylation occurs forming carbon chains, limiting application to hydrophobic solvents or polymer resins

Engineering Contradiction:

Improvepreparation process simplicityVSAvoidapplication range to solvents and resins

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent combines both monovalent amine and bivalent amine in the functionalization process. The bivalent amine provides bonding to the graphene surface while the monovalent amine provides the desired functional groups, achieving both effective functionalization and broad applicability to various solvents and resins.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The functionalized graphene contains a composite structure with both monovalent amine groups and bivalent amine groups attached to the graphene surface. This composite functional group structure enables both strong bonding to graphene and versatile application to different solvents and polymer resins.

Inventive Principle:

Principle #40Composite materials

2Reliability

If bivalent amine alone is used to prepare functionalized graphene, then bonding to graphene surface is achieved, but the process steps are increased due to catalyst use and pre-treatment, and production cost is high

Engineering Contradiction:

Improvebonding strength to graphene surfaceVSAvoidprocess steps and pre-treatment requirements

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines both monovalent amine and bivalent amine in the functionalization process. The bivalent amine provides bonding to the graphene surface while the monovalent amine provides the desired functional groups, achieving both effective functionalization and broad applicability to various solvents and resins.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If bivalent amine alone is used to prepare functionalized graphene, then bonding to graphene surface is achieved, but agglomerates are occurred through reduction process because reduction is performed after functionalization

Engineering Contradiction:

Improvebonding strength to graphene surfaceVSAvoiddispersion uniformity

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent combines both monovalent amine and bivalent amine in the functionalization process. The bivalent amine provides bonding to the graphene surface while the monovalent amine provides the desired functional groups, achieving both effective functionalization and broad applicability to various solvents and resins.

Inventive Principle:

Principle #5Merging (Combining)

4Device complexity

If conventional functionalized graphene with one amine type is used, then the structure is simple, but the kneadability and dispersibility with various solvents and resins are poor, requiring specific solvent and resin

Engineering Contradiction:

Improvefunctional group structure simplicityVSAvoidkneadability and dispersibility range

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by having different amine groups serve different functions: bivalent amine groups provide bonding to the graphene surface while monovalent amine groups provide interaction with various solvents and resins. This localized functional differentiation enables both strong bonding and broad versatility.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The functionalized graphene achieves multi-functionality by incorporating both monovalent and bivalent amine groups. The bivalent amine provides anchoring to graphene while the monovalent amine provides compatibility with various solvents and polymer resins, making the material universally applicable.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 functionalized graphene exhibits excellent electrical, thermal, and mechanical properties, with enhanced interfacial bonding strength and uniform dispersion in thermoplastic polymers, improving its applicability in various fields including electrostatic discharge, electromagnetic interference shielding, and heat radiation.

Implementation Method 1

a monovalent amine group and a bivalent or higher amine group which are bonded to the carbon material

Methodology Applied

Scientific EffectChemical bonding: Chemical Bonding

Data Source

PatentUS10934171B2Functionalized graphene comprising two or more types of amines, and preparation method therefor

Publication Date: 2021.03.02 DONGJIN SEMICHEM CO LTD

AI summary

Disclosed is a functionalized graphene containing two or more amines having excellent electrical, thermal and mechanical properties by allowing good interfacial bonding force and uniform dispersion with a thermoplastic polymer, and a method for preparing the functional graphene. The functionalized graphene comprises a carbon material selected from the group consisting of graphene, reduced graphene, graphene oxide, and mixture thereof; and a monovalent amine group and a bivalent or higher amine group which are bonded to the carbon material.