Catalyst-Free Acetylated Wood Flour Composition for Thermoforming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing compositions derived from woody biomass lack sufficient thermoplasticity and thermomechanical properties for effective thermoforming, and the use of catalysts in acetylation processes leads to quality deterioration in molded products.
Innovation Solution
A composition comprising acetylated wood flour, produced without catalyst residues, is manufactured through reduced pressure treatment, pressurization in a solvent with an acetylating agent, and acetylation at controlled temperatures and pressures, followed by optional grafting with a lactone compound to enhance thermoplasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If woody biomass is used as a raw material for biodegradable materials, then environmental friendliness is improved, but thermoplasticity and thermomechanical properties are insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of woody biomass through acetylation. The acetylation process changes the degree of substitution and molecular weight parameters, transforming the raw biomass into a material with improved thermoplasticity while maintaining biodegradability. This resolves the contradiction by chemically altering the material parameters to achieve both environmental friendliness and sufficient thermomechanical properties.
Solution Approach 2:
The patent creates composite materials by combining acetylated woody biomass with other components to achieve the desired thermoplasticity. The composite structure allows the biodegradable biomass base to maintain environmental friendliness while the added components or modified structure provides the necessary thermomechanical strength and formability.
2Productivity
If catalysts are used in acetylation processes to improve reaction efficiency, then productivity is improved, but quality deterioration occurs in molded products
Solution Approach 1:
The patent applies the extraction principle by removing catalysts from the acetylation process. Instead of using traditional catalysts that cause quality deterioration, the patent employs catalyst-free acetylation conditions or uses alternative acetylating agents that do not require catalysts. This eliminates the harmful catalyst residues while maintaining reaction efficiency through optimized process conditions such as temperature, pressure, and reaction time.
Solution Approach 2:
The patent uses an intermediary substance or mechanism to facilitate the acetylation reaction without requiring catalysts. This may involve using a different chemical pathway or intermediate compound that enables the acetylation to proceed efficiently without the need for catalysts that would otherwise contaminate the final product and cause quality issues.
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 resulting composition exhibits thermoplasticity comparable to petroleum-based materials, preventing quality deterioration and enabling the production of high-quality molded products with improved mechanical properties.
Implementation Method 1
acetylated wood flour produced without using an acetylation catalyst
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A composition contains an acetylated wood flour. This acetylated wood flour is substantially free of an inorganic acid ester bound to a cellulose main chain. A method of manufacturing the composition includes: treating a wood flour under reduced pressure; subjecting the wood flour treated under reduced pressure to pressurization treatment at an absolute pressure of 10 bar or more in an immersed state in a solvent containing an acetylating agent; and after the pressurization treatment, subjecting the wood flour to acetylation treatment by maintaining the solvent containing the wood flour and the acetylating agent at a temperature of 60 to 130°C in a pressurized state at an absolute pressure of 1.1 to 1.9 bar in an inert gas atmosphere.