Bioactive Coating for Formaldehyde Conversion

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Solution Overview

Problem

Current methods for remediation of formaldehyde, a common environmental contaminant in building interiors, lack effective enzyme systems for converting formaldehyde into carbon dioxide, posing challenges in indoor air quality improvement.

Innovation Solution

A bioactive coating comprising immobilized alcohol/aldehyde oxidase (AOX) and formate oxidase (FOX) on a solid particulate support with a latex binder is developed, which catalyzes the conversion of formaldehyde to carbon dioxide, utilizing a proposed mechanism for enzymatic decomposition.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If immobilized enzymes are used for formaldehyde remediation, then formaldehyde conversion efficiency is improved, but enzyme identification and immobilization reliability remain unpredictable

Engineering Contradiction:

Improveformaldehyde conversion efficiencyVSAvoidenzyme system reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent changes the parameters of enzyme selection by specifically identifying alcohol/aldehyde oxidase and formate oxidase as the optimal enzyme combination for formaldehyde remediation. It also changes immobilization parameters by using silica-based particulate supports with specific surface areas and pore structures, creating predictable and reliable conditions for enzyme function.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite material system combining silica-based particulate supports with immobilized enzyme complexes. This composite structure provides both the mechanical support needed for immobilization and the catalytic activity for formaldehyde conversion, achieving reliable and efficient remediation.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If enzyme systems are developed for formaldehyde remediation, then indoor air quality improvement is achieved, but commercial availability and application scalability are limited

Engineering Contradiction:

Improveindoor air qualityVSAvoidcommercial applicability

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent develops a universal enzyme system that can be applied to multiple formaldehyde remediation scenarios including indoor air quality improvement, building material treatment, and environmental cleanup. The standardized silica-based support system allows for scalable production and application across different contexts.

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 coating efficiently converts formaldehyde to carbon dioxide within 24 hours, achieving high abatement efficiency with long-term stability and color stability, suitable for use in building interiors.

Implementation Method 1

a coating for conversion of formaldehyde to carbon dioxide comprises an alcohol/aldehyde oxidase (AOX) and a formate oxidase (FOX)

Methodology Applied

Scientific EffectEnzymatic oxidation: Oxidation

Implementation Method 2

both the alcohol/aldehyde oxidase and the formate oxidase are immobilized on a solid particulate support

Methodology Applied

Scientific EffectCatalysis: Catalysis

Data Source

PatentUS11597845B2Coating for aldehyde remediation and method of making

Publication Date: 2023.03.07 DOW GLOBAL TECHNOLOGIES LLC

AI summary

A coating for conversion of formaldehyde to carbon dioxide includes an alcohol/aldehyde oxidase and a formate oxidase immobilized on a solid particulate support; and a latex binder.