Microfluidic Chip Engraved Patterns for Microplastic Analysis
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Solution Overview
Problem
Current methods for detecting and analyzing microplastic particles in drinking water are time-consuming, costly, and inefficient, particularly for particles smaller than 200 micrometers, as they do not effectively determine the physical properties and chemical nature of these particles.
Innovation Solution
A microfluidic chip with integrated filters and spectroscopy means that allows for high-throughput analysis of microplastic particles, including size, shape, and chemical composition, using a sorting chamber with engraved patterns to trap and separate particles by size, and alignment and analysis areas for real-time chemical determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional microscopy or chromatography methods are used to detect and analyze microplastic particles, then detection and identification can be achieved, but the process is time-consuming and costly
Solution Approach 1:
The device segments the analysis process into distinct functional modules: a sorting chamber with engraved patterns for size-based separation, multiple filters with different pore sizes for particle trapping, and an analysis chamber for chemical identification. This segmentation allows parallel processing of multiple particles simultaneously, reducing overall analysis time while maintaining detection precision
Solution Approach 2:
The sorting chamber with engraved patterns performs preliminary size-based separation of microplastic particles before they reach the analysis chamber. This preliminary action pre-concentrates particles of interest and removes larger debris, enabling faster and more efficient subsequent chemical analysis without compromising detection accuracy
2Measurement precision
If conventional analytical equipment is used for microplastic detection, then identification can be achieved, but the cost is high
Solution Approach 1:
The device replaces expensive conventional mechanical separation equipment with a microfabricated sorting chamber containing engraved patterns. These patterns create deterministic lateral displacement that separates particles by size without requiring complex mechanical moving parts, significantly reducing manufacturing cost while maintaining separation efficiency
Solution Approach 2:
The invention changes the scale parameter from conventional macro-scale filtration to micro-scale engraved patterns. This parameter change enables the use of standard semiconductor fabrication techniques for manufacturing, dramatically reducing device cost while improving identification accuracy through better particle confinement and analysis
3Quantity of substance
If standard filtration methods are used to concentrate microplastic particles, then particle accumulation can be achieved, but the required surface area is large
Solution Approach 1:
The device transitions from two-dimensional flat filtration to three-dimensional particle manipulation using vertically stacked engraved patterns and multiple filtration layers. This dimensional change allows particle concentration to occur in the vertical dimension, achieving high particle concentration on a small horizontal footprint area
4Measurement precision
If manual analysis methods are used for microplastic characterization, then detailed physical and chemical properties can be determined, but automation is lacking
Solution Approach 1:
The microfluidic device integrates multiple functions into a single automated platform: size-based sorting, particle concentration, chemical analysis, and data acquisition. This multi-functional integration automates the entire characterization process, eliminating manual intervention while maintaining comprehensive physical and chemical property determination
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
This solution enables rapid, cost-effective, and precise analysis of microplastic particles, concentrating them on a small surface for efficient detection and identification, optimizing speed and reducing the time and cost associated with current methodologies.
Implementation Method 1
at least one filter allowing the trapping of the microplastic particles in the flow to accumulate the microplastic particles in at least one stop area on the filter
Implementation Method 2
spectroscopy means for determining the chemical nature and quantities of the microplastic particles
Data Source
Figure 1a~1c
Figure 2a~2d
Figure 3a~3b
AI summary
A microfluidic chip (1) used for determining the physical properties and/or the chemical nature of at least two microplastic particles (3, 26, 28) suspended in a water liquid sample (4), the microplastic particles (3, 26, 28) having a size smaller than 200 micrometers, which comprises a first microfluidic channel (13) in which the microplastic particles flow, at least one filter (23) allowing the trapping of the microplastic particles (3, 26, 28) in the flow to accumulate the microplastic particles (3, 26, 28) in at least one stop area (24) on the filter (23), the filter (23) a being pattern engraved on the microfluidic chip (1), at least one output (19) downstream the filter (23), to exit the water sample (4) without the microplastic particles (3) from the microfluidic chip (1).