Natural Fiber Composite Panel Lignin Removal
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Solution Overview
Problem
The commercialization of natural fiber reinforced composite sheet materials is limited due to challenges in extracting purified natural fibers from renewable plant sources with mechanical properties comparable to man-made reinforcing materials.
Innovation Solution
A method involving treating plant sources with solvents, processing the natural fibers into a sheet-like orientation, and applying a polymeric material to form a composite sheet, which includes steps like soaking, steaming, removing lignin, and heating with thermoplastic material to create a composite panel with oriented bamboo fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If natural fibers are extracted from renewable plant sources to replace traditional reinforcing materials, then environmental sustainability and weight reduction are improved, but extraction difficulty and manufacturing complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-treating the natural fibers with chemical solutions (such as alkali treatments) before composite formation. This pre-treatment removes impurities and prepares the fiber surface for better polymer adhesion, simplifying the overall manufacturing process while maintaining fiber integrity and reducing extraction difficulty
Solution Approach 2:
The patent utilizes parameter changes by modifying chemical parameters (pH, temperature, concentration of treating solutions) during fiber extraction and treatment. These parameter adjustments optimize the extraction process to achieve purified fibers with desired mechanical properties while controlling manufacturing complexity
2Adaptability or versatility
If natural fibers are used as reinforcing materials, then weight savings and design flexibility are improved, but mechanical properties comparable to man-made materials deteriorate
Solution Approach 1:
The patent applies local quality by treating different portions of the natural fiber differently - the fiber core maintains its structural integrity while the surface undergoes chemical modification to enhance adhesion. This localized treatment improves mechanical properties without compromising the fiber's natural flexibility and design adaptability
Solution Approach 2:
The patent creates a composite material system where natural fibers are combined with polymeric matrices through controlled impregnation. The resulting composite leverages the lightweight and flexible nature of natural fibers while the polymer matrix provides structural support and enhances overall mechanical properties
3Strength
If natural fibers are processed into purified form with mechanical properties comparable to man-made materials, then mechanical strength is improved, but processing complexity and cost increase
Solution Approach 1:
The patent extracts only the essential components needed for strength - removing lignin and other impurities from natural fibers through selective chemical treatments. This extraction process purifies the fibers while maintaining their structural integrity, achieving mechanical strength comparable to man-made materials without excessive processing complexity
Solution Approach 2:
The patent uses chemical intermediaries (such as alkali solutions and coupling agents) to facilitate the treatment process. These intermediaries enable effective fiber purification and surface modification without requiring complex processing equipment, bridging the gap between simple natural fiber processing and high-performance composite production
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 scalable and cost-effective commercialization of natural fiber composite panels with improved mechanical properties, suitable for various applications, maintaining fiber integrity and length, and offering advantages in weight savings and design flexibility.
Implementation Method 1
treating a plant source comprising natural fibers with a solvent
Implementation Method 2
applying a polymeric material to the arranged natural fibers
Implementation Method 3
binding the processed bamboo with the thermoplastic material by heating and compressing the processed bamboo and thermoplastic material together in the mold
Data Source
AI summary
A reinforced composite panel and method of making the composite panel uses processed natural fibers such as bamboo along with a polymeric material. The method includes the steps of: treating a plant source comprising natural fibers with a solvent and processing the treated plant source. The processing step can include arranging the natural fibers into a sheet-like orientation in a variety of ways. A polymeric material is then applied to the natural fibers to form a composite sheet, and the composite panel can be formed from one or more composite sheets.