Titanium Dioxide Nanofiber Window Screen for Dust Filtration and Ventilation

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Solution Overview

Problem

Existing insect screens fail to effectively prevent the entry of harmful fine dust while maintaining air ventilation and providing protection against pests, leading to increased respiratory disease risks and reduced indoor air quality.

Innovation Solution

A titanium dioxide-filled nano dustproof window screen comprising a first fabric made of polyacrylonitrile carbon fibers, a nanofiber web of polyvinylidene fluoride and reduced titanium dioxide, and a second fabric of polyethylene terephthalate fibers, laminated together to enhance dust collection, air ventilation, flame resistance, and NOx removal efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If existing insect screens are used to provide pest protection and air ventilation, then insect protection and ventilation are achieved, but harmful fine dust enters the house

Engineering Contradiction:

Improvefine dust entryVSAvoidair ventilation

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent employs a nanofiber web with controlled porosity and pore size distribution to physically block fine dust particles while allowing air molecules to pass through. The nanofiber structure creates a tortuous path that captures dust particles through interception and impaction, achieving dustproof performance without significantly compromising air ventilation.

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The patent uses a composite structure consisting of multiple layers including insect screen fabric, nanofiber web, and support fabric. This composite material approach combines the pest-blocking capability of traditional insect screens with the fine dust filtration capability of nanofibers, while the support fabric provides structural integrity. The synergistic combination resolves the contradiction between dustproofing and ventilation.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If a denser screen structure is used to block fine dust, then dust collection efficiency improves, but air ventilation decreases

Engineering Contradiction:

Improvedust collection efficiencyVSAvoidair ventilation

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The patent transitions from traditional 2D planar screen structures to a 3D nanofiber web structure with controlled thickness and porosity. This dimensional change allows the creation of a filtration medium that provides extended filtration path length and increased surface area for dust capture, while maintaining adequate air permeability through optimized pore structure and thickness control.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent applies different structural characteristics to different regions and layers of the window screen. The nanofiber web has high density and small pore sizes in regions where dust capture is critical, while maintaining overall porosity for ventilation. The insect screen fabric provides coarse filtration for insects, while the nanofiber layer provides fine dust filtration, creating localized quality variations that optimize both dust collection and ventilation.

Inventive Principle:

Principle #3Local quality

3Ease of manufacture

If traditional insect screen materials are used, then manufacturing simplicity is maintained, but flame-resistant performance is insufficient

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidflame-resistant performance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent modifies the chemical composition and physical parameters of the screen materials to achieve flame resistance. The nanofiber web incorporates materials with inherent flame-retardant properties, and the composite structure is designed to resist ignition and slow combustion propagation. These parameter changes in material composition maintain manufacturability through established nanofiber deposition techniques while significantly improving flame-resistant performance.

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 screen achieves excellent dust collection efficiency, air ventilation, flame-resistant performance, and NOx removal efficiency, while maintaining visible light transmittance.

Implementation Method 1

a nanofiber web, and a second fabric laminated on top of one another

Methodology Applied

Scientific EffectFiltration: Filter (physical)

Implementation Method 2

titanium dioxide-filled nano dustproof window screen that is capable of blocking external pollutants such as fine dust, ultrafine dust, and yellow dust, while having excellent air ventilation, flame-resistant performance, nitrogen oxides (NOx) removal efficiency

Methodology Applied

Scientific EffectPhotocatalytic oxidation: Photo-oxidation

Data Source

PatentUS20260070308A1Using titanium dioxide nanofibers to create air-cleaning and dust-proof windows

Publication Date: 2026.03.12 CLEARCHANG

AI summary

The present inventive concept relates to an air purification and nano dustproof window screen that is made of titanium dioxide nanofibers, more specifically to a titanium dioxide-filled nano dustproof window screen that is capable of blocking external pollutants such as fine dust, ultrafine dust, and yellow dust, having excellent air ventilation, flame-resistant performance, NOx removal efficiency, and visible light transmittance.