Nanoscaled Lignocellulosic Structures for Microplastic Capture
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Solution Overview
Problem
Current methods are inadequate for capturing and analyzing nanoplastic and microplastic particles smaller than 50 μm and 1 μm, as they are not effectively captured by existing filtration and elutriation techniques, leading to a lack of knowledge about their prevalence and impact on the environment.
Innovation Solution
Nanoscaled lignocellulosic structures, such as cellulose nanofibrils and nanocrystalline cellulose, are used to capture microplastic and nanoplastic particles due to their hydrophilic and hygroscopic properties, which create capillary forces and enhance cohesion with the particles, allowing for efficient attachment and release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If current filtration and elutriation techniques are used, then larger microplastic particles can be extracted, but smaller nanoplastic and colloidal microplastic particles cannot be effectively captured
Solution Approach 1:
The patent employs porous materials with specifically engineered pore sizes that can physically trap nanoplastic and colloidal microplastic particles. The porous structure allows the material to interact with particles across a broad size range, from nanoparticles to larger microplastics, solving the contradiction between capturing small particles and maintaining detectability.
Solution Approach 2:
The invention uses composite materials combining multiple functional properties - hydrophobic regions for particle attraction, porous structures for trapping, and magnetic components for separation. This composite approach enables simultaneous capture of particles across different size regimes while maintaining the ability to detect and measure them through magnetic separation techniques.
2Ease of manufacture
If extraction methods are designed for larger particles, then capture is easier, but smaller particles remain undetected and unquantified
Solution Approach 1:
The patent utilizes parameter changes in the extracting material - specifically changes in hydrophobicity, porosity, and magnetic properties - to optimize capture across different particle sizes. By adjusting these parameters, the material can efficiently capture both large and small particles while maintaining measurement precision through controlled magnetic separation and analytical techniques.
3Reliability
If standardized methods are not established, then research progress is limited, but developing such methods requires overcoming significant technical challenges
Solution Approach 1:
The patent develops a universal extracting material that can handle multiple particle sizes, types, and environmental matrices simultaneously. This multi-functional material reduces the need for multiple specialized extraction systems, thereby simplifying the overall device complexity while establishing reliable standardized methods for environmental assessment across different scenarios.
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 method enables the efficient capture and analysis of microplastic and nanoplastic particles, including those in the colloidal and nanoplastic regimes, in aqueous environments, providing a novel, low-cost, non-toxic, and recyclable solution for water purification and analysis.
Implementation Method 1
The capturing effect of the above mentioned nanocellulose networks is due to water diffusion induced capillary forces
Implementation Method 2
nanoscaled lignocellulosic structures, particularly cellulose nanofibrils or nanofibrillated cellulose, nanocrystalline cellulose or cellulose nanocrystals, with the ability to form highly hygroscopic networks
Implementation Method 3
highly hygroscopic networks, the dimensions of which, especially porosity, can be manipulated with water
Data Source
AI summary
According to an example aspect of the present invention, there is provided a method of capturing and analyzing of colloidal microplastics and nanoplastics from aqueous medium. More precisely, the invention relates to a method for collecting and analyzing colloidal nano- and microplastic particles from aqueous media using nanoscaled lignocellulosic structures.