Resin Modifier via Cellulose Nanofiber Amine Reaction
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Solution Overview
Problem
The existing methods for using cellulose nanofibers as resin modifiers fail to achieve a strong bonding with resin particles, leading to inadequate dispersion and reinforcing effects due to insufficient compatibility and bonding between cellulose nanofibers and resin.
Innovation Solution
A method involving the polymerization of ethylene unsaturated monomers in the presence of cellulose nanofibers, where the cellulose nanofibers are reacted with an amine or a quaternary ammonium salt compound, enhancing their compatibility and dispersion within the resin, and the use of oxidized or polyvalent carboxylic acid-modified cellulose nanofibers to improve bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cellulose nanofiber is simply mixed with resin, then the process is simple, but the reinforcing effect is insufficient due to poor compatibility
Solution Approach 1:
The patent introduces an intermediary substance (silane coupling agent or amine compound) that mediates between the hydrophilic cellulose nanofiber and hydrophobic resin. This intermediary forms chemical bonds with both materials, creating a bridge that improves compatibility and enables effective stress transfer, thereby resolving the contradiction between simple mixing and achieving reinforcing effect.
Solution Approach 2:
The patent modifies the surface properties of cellulose nanofiber by changing chemical parameters (introducing hydrophobic groups through silane modification or amine reaction). This parameter change in surface chemistry improves compatibility with resin while maintaining the nanofiber structure, allowing simple mixing to yield effective reinforcing results.
2Adaptability or versatility
If cellulose nanofiber is disposed at surface of resin particles, then compatibility improves, but bonding strength is insufficient
Solution Approach 1:
The patent employs silane coupling agents or amine compounds as intermediaries that chemically bond to both the cellulose nanofiber surface and resin matrix. This intermediary mechanism creates strong interfacial bonding while maintaining compatibility, resolving the contradiction between improved compatibility and insufficient bonding strength.
Solution Approach 2:
The patent creates a composite structure where modified cellulose nanofiber (with silane or amine groups) forms a hybrid interface with resin. This composite approach combines the advantages of different materials to achieve both compatibility and strong bonding, overcoming the limitations of simple surface disposal.
3Ease of manufacture
If cellulose nanofiber is not strongly bonded to resin particles, then processing is easier, but uniform dispersion is failed
Solution Approach 1:
The patent changes the surface energy and chemical parameters of cellulose nanofiber through silane modification or amine reaction. This parameter change creates appropriate surface properties that promote uniform dispersion in resin while maintaining processing ease, resolving the contradiction between processing ease and uniform dispersion stability.
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 approach results in a resin modifier that exhibits excellent modifying effects, with improved compatibility and dispersion of cellulose nanofibers within the resin, leading to enhanced mechanical properties and processing advantages.
Implementation Method 1
the cellulose nanofiber being reacted with an amine or a quaternary ammonium salt compound
Implementation Method 2
a process of polymerizing an ethylene unsaturated monomer in the presence of a cellulose nanofiber
Implementation Method 3
the oxidized cellulose being obtained from a cellulose-based raw material using, as an oxidant, a hypochlorous acid
Data Source
AI summary
A method of producing a resin modifier, the method comprising a process of polymerizing an ethylene unsaturated monomer in the presence of a cellulose nanofiber, the cellulose nanofiber being reacted with an amine or a quaternary ammonium salt compound.