MXene Coating Film for EMI Shielding via Organosilane Modification

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Solution Overview

Problem

MXene's hydrophilic surface characteristics hinder its dispersion in hydrophobic organic solvents, leading to low wettability and dispersibility, which complicates achieving sufficient electrical conductivity and effective EMI shielding in industrial applications.

Innovation Solution

Surface-modifying MXene with an organosilane compound enhances compatibility and dispersibility in organic solvents, resulting in a coating film with low resistance and high electrical conductivity, and an EMI shielding composite with improved surface properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If MXene is dispersed in organic solvent, then electrical conductivity and EMI shielding effectiveness are improved, but wettability and dispersibility of MXene surface to organic solvent deteriorate

Engineering Contradiction:

Improveelectrical conductivityVSAvoiddispersibility

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent introduces a surface modifier as an intermediary substance that bridges the hydrophilic MXene surface and hydrophobic organic solvent. This modifier improves wettability and dispersibility, enabling sufficient electrical conductivity and EMI shielding effectiveness in organic solvent-based coatings.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the surface properties of MXene by controlling the content of surface modifier (0.1-10 wt%) to optimize the balance between hydrophilicity and hydrophobicity. This parameter adjustment enables MXene to disperse properly in organic solvents while maintaining electrical conductivity.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If MXene surface is modified with organosilane compound, then wettability and dispersibility in organic solvent are improved, but complexity of surface modification process increases

Engineering Contradiction:

ImprovewettabilityVSAvoidsurface modification process

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent optimizes the content of organosilane compound (0.1-10 wt%) to achieve sufficient wettability and dispersibility without excessive complexity in the modification process. This parameter control allows practical application while maintaining improved surface properties.

Inventive Principle:

Principle #35Parameter changes

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 surface-modified MXene exhibits enhanced wettability and homogenous dispersion in organic solvents, leading to a coating film with high density, low resistance, and high electrical conductivity, effectively addressing the challenges of previous MXene-based materials.

Implementation Method 1

MXene surface-modified with an organosilane compound

Methodology Applied

Scientific EffectSurface modification: Chemical Bonding

Implementation Method 2

enhances compatibility and dispersibility in organic solvents

Methodology Applied

Scientific EffectDispersion: Dispersion (of waves)

Implementation Method 3

exhibits enhanced wettability and homogenous dispersion in organic solvents

Methodology Applied

Scientific EffectWettability: Wetting

Data Source

PatentEP3564325B1Coating composition, coating film, and composite for shielding electromagnetic wave

Publication Date: 2020.11.04 LG CHEM LTD

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AI summary

A coating composition includes MXene surface-modified with an organosilane compound; and an organic solvent, a coating film including MXene surface-modified with an organosilane compound, and an EMI shielding composite including MXene surface-modified with an organosilane compound.