MXene-Polymer Composite Material Using Hydrogen Bond Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current MXene/polymer composite materials fail to achieve both high electrical conductivity and high strength simultaneously, with most exhibiting significantly lower conductivity than pure MXene films.
Innovation Solution
A conductive composite material comprising particles of MXene, where the MXene layers are modified with hydroxyl groups, fluorine, chlorine, oxygen, or hydrogen atoms, and a polymer material that includes hydrogen acceptors like fluorine, chlorine, oxygen, or nitrogen atoms, and hydrogen donors such as hydroxyl groups or secondary amino groups, with a volume ratio of MXene particles between 19% and 95%, forming hydrogen bonds to enhance conductivity and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If MXene particles are mixed with polymer materials to form composite materials, then strength and flexibility are improved, but electrical conductivity is significantly reduced
Solution Approach 1:
The patent changes the chemical parameters of the polymer material by selecting specific functional groups (hydrogen donors like hydroxyl groups and hydrogen acceptors like carbonyl groups) to enable hydrogen bonding with MXene. This parameter change allows the composite to maintain high electrical conductivity (68%-79% of pure MXene) while achieving high strength, resolving the contradiction between mechanical strength and electrical conductivity
Solution Approach 2:
The patent creates a composite material system combining MXene particles with specifically selected polymer materials that have hydrogen bonding capabilities. The composite structure maintains the conductive network of MXene while the polymer matrix provides mechanical strength through hydrogen bonds, simultaneously achieving both high strength and high electrical conductivity
2Reliability
If high content of MXene (90 mass %) is used in composite film, then electrical conductivity is maintained, but mechanical strength is insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the polymer matrix by selecting materials with specific hydrogen bonding groups. This allows the use of lower MXene content (19-95 volume ratio) while maintaining both electrical conductivity and mechanical strength through enhanced interfacial hydrogen bonding, resolving the contradiction between conductivity and strength
3Reliability
If annealing treatment is applied to remove polar groups on MXene surface, then electrical conductivity increases, but EMI shielding effectiveness is reduced
Solution Approach 1:
The patent performs preliminary action by pre-modifying the MXene surface with terminal groups (T in MmXnTx) that can form hydrogen bonds with the polymer matrix. This preliminary surface modification ensures that the MXene particles maintain both high electrical conductivity and EMI shielding effectiveness without requiring post-processing annealing that would remove the beneficial polar groups
Solution Approach 2:
The patent creates a composite material where the interface between MXene and polymer is optimized through hydrogen bonding. This composite structure allows the retention of polar groups on MXene surface, maintaining both electrical conductivity and EMI shielding effectiveness simultaneously, avoiding the need for annealing treatment that sacrifices EMI shielding
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 composite material achieves high electrical conductivity, maintaining 68% to 79% of pure MXene's conductivity while ensuring high strength, with the optimal MXene volume ratio above 19% ensuring electrical conductivity of at least 280 S/cm and up to 15000 S/cm, suitable for applications like electrodes and EMI shields.
Implementation Method 1
a polymer material that includes a hydrogen acceptor that is at least one selected from the group consisting of a fluorine atom, a chlorine atom, an oxygen atom, or a nitrogen atom, and a hydrogen donor that is a hydroxyl group and/or a secondary amino group
Data Source
AI summary
A conductive composite material that includes: particles of a layered material including one or plural layers, wherein the one or plural layers include a layer body represented by: MmXn, where M is at least one metal of Group 3, 4, 5, 6, or 7, X is a carbon atom, a nitrogen atom, or a combination thereof, n is not less than 1 and not more than 4, m is more than n but not more than 5, and a modifier or terminal T exists on a surface of the layer body, where T is at least one of a hydroxyl group, a fluorine atom, a chlorine atom, an oxygen atom, or a hydrogen atom; and a polymer material that includes a hydrogen acceptor and a hydrogen donor, a ratio of the particles of the layered material is more than 19% by volume but not more than 95% by volume.