Lignin Nanoparticle Dispersion Process via pH and Heat
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Solution Overview
Problem
Current methods for preparing lignin nanoparticles are inefficient, costly, and environmentally hazardous due to the use of organic solvents and hazardous chemicals, limiting their economic viability and environmental sustainability.
Innovation Solution
A mild and simple process for preparing lignin nanoparticle dispersions in water without the use of solvents or hazardous chemicals, involving the combination of lignin with a base and water to form a stable dispersion, which can be heated to create lignin nanoparticle dispersions that are stable and suitable for various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods using organic solvents and hazardous chemicals are employed to prepare lignin nanoparticles, then the nanoparticles can be produced, but the process becomes environmentally hazardous and costly
Solution Approach 1:
The patent converts the traditionally harmful black liquor byproduct from kraft pulping into a valuable raw material for producing lignin nanoparticles. Instead of discarding or burning the hazardous waste stream, the process extracts and utilizes lignin from this waste material, transforming an environmental liability into an eco-friendly nanoparticle production method that eliminates the need for separate organic solvents and hazardous chemicals
2Adaptability or versatility
If derivatization methods are used to increase lignin functionality, then the thermal stability and application range improve, but the process complexity and cost increase due to intensive processing and hazardous chemicals
Solution Approach 1:
The patent employs parameter changes by adjusting pH levels and applying controlled heat treatment to achieve lignin nanoparticle formation and functional modification. Instead of using complex derivatization chemistry with hazardous reagents, the process utilizes changes in physical parameters (pH, temperature) to control nanoparticle formation, size, and functional properties, thereby reducing process complexity while maintaining versatility
3Productivity
If lignin nanoparticles are produced using traditional methods, then the particles can be obtained, but the production cost increases and economic viability decreases
Solution Approach 1:
The patent implements self-service by using the lignin itself and components from the black liquor matrix to facilitate nanoparticle formation and stabilization. The natural lignin structures and associated compounds in black liquor serve as both the nanoparticle precursor and the dispersing medium, eliminating the need for expensive external solvents, surfactants, or stabilizing agents, thereby significantly reducing production costs while maintaining high productivity
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 produces cost-effective, environmentally friendly lignin nanoparticle dispersions that can impart rinse-resistant and hydrophilic properties to surfaces, enhancing their functionality and economic value.
Implementation Method 1
heating the lignin composition while stirring to a temperature in the range of from about 30 to about 100 °C
Implementation Method 2
impart rinse-resistant adsorption of the lignin nanoparticles to a substrate
Data Source
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AI summary
A mild, simple process of preparing lignin nanoparticle dispersions is disclosed. Additionally, compositions and methods of making lignin nanoparticle—polymer complexes comprising derivatized and/or non-derivatized lignin nanoparticle dispersions and water soluble and/or water dispersible polymers are disclosed. Further, methods of using at least one of the lignin nanoparticle dispersions, derivatized lignin nanoparticle dispersions, and/or the lignin nanoparticle—polymer complex to impart rinse-resistant properties, such as hydrophilic properties, to substrates, or function as tunable nanoparticle surfactants are disclosed.