Substrate treated with antimicrobial coating agent and preparation method thereof

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Solution Overview

Problem

Existing air purification filters face challenges in effectively fixing and utilizing inorganic antimicrobial agents on their surfaces, leading to difficulties in removing and sterilizing microorganisms like bacteria, viruses, and fungi due to the agents' particle form.

Innovation Solution

A substrate with an antimicrobial coating agent comprising urushiol and an inorganic antimicrobial agent, where the inorganic agent is fixed onto the surface through crosslinking, allowing for effective antimicrobial activity against various microorganisms, including Gram-positive and Gram-negative bacteria.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If inorganic-based antimicrobial agents are used in substrates such as air purification filters, then antimicrobial properties are imparted to the filter, but the agents exist in the form of particles with several micrometer units in size making it difficult to introduce them into the filter

Engineering Contradiction:

Improveantimicrobial propertiesVSAvoiddifficulty to introduce into filter

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the physical state of the inorganic antimicrobial agent from particle form to dissolved form in a coating solution, enabling it to be uniformly applied to the filter substrate. The agent is dissolved in a solvent to create a coating solution that can be easily introduced into the filter structure, then applied and dried to form a functional coating.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a coating solution as an intermediary medium to deliver the inorganic antimicrobial agent to the filter substrate. The coating solution acts as a carrier that facilitates the introduction of the agent into the filter, solving the problem of direct particle application being too coarse for filter structures.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a coating technique is used to impart antimicrobial properties, then the antimicrobial agent can be fixed on the surface of the substrate, but the coating may clog pores and reduce filtration efficiency

Engineering Contradiction:

Improveantimicrobial activityVSAvoidfiltration efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies a thin film coating technique where the inorganic antimicrobial agent is dissolved in a coating solution and applied as a thin layer on the filter surface. This thin film approach provides antimicrobial protection while maintaining pore openness and filtration efficiency, avoiding the clogging problem that would occur with thick coatings or particle application.

Inventive Principle:

Principle #30Flexible shells and thin films

3Ease of manufacture

If synthetic polymers are used as antimicrobial coating agents, then coating can be performed, but the process is less environmentally friendly and requires more complex polymerization conditions

Engineering Contradiction:

Improvecoating performanceVSAvoidenvironmental friendliness

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent employs a natural polymer coating agent that can be applied and dried to form a functional coating without requiring complex polymerization conditions. The coating agent is designed to be environmentally friendly while maintaining effective coating performance, eliminating the need for harsh synthetic polymerization processes.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 solution provides a stable, environmentally friendly, and chemically resistant antimicrobial coating that effectively fixes the inorganic antimicrobial agent, ensuring excellent antimicrobial activity without clogging pores, even after washing, and is suitable for use in air purification systems.

Implementation Method 1

the inorganic antimicrobial agent is fixed onto the surface of the substrate while urushiol being crosslinked

Methodology Applied

Scientific EffectCrosslinking: Chemical Bonding

Implementation Method 2

impregnating the substrate with the coating agent to perform high temperature polymerization

Methodology Applied

Scientific EffectThermal polymerization: Photopolymerisation

Data Source

PatentUS11814544B2Substrate treated with antimicrobial coating agent and preparation method thereof

Publication Date: 2023.11.14 LG CHEM LTD

AI summary

The present disclosure relates to a substrate in which an antimicrobial coating agent including urushiol and an inorganic antimicrobial agent is fixed and coated onto the surface, and a method for antimicrobial coating on the surface of the substrate.