Fibrous Cellulose Composite Resin Network Formation
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Solution Overview
Problem
The use of cellulose nanofibers as resin reinforcing materials is limited by poor dispersibility and inability to form a sufficient three-dimensional network, resulting in inadequate reinforcing effects due to irreversible aggregation caused by intermolecular hydrogen bonds.
Innovation Solution
The development of fibrous cellulose with an average fiber width of 0.1 μm or more, an average fiber length of 0.02 to 3.0 mm, and a fibrillation ratio of 1.0% or more, modified with functional groups and processed using a polybasic acid, to enhance dispersibility and form a strong three-dimensional network within the resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cellulose nanofiber is used as resin reinforcing material, then strength and elasticity are improved, but dispersibility in resin deteriorates due to irreversible aggregation from intermolecular hydrogen bonds
Solution Approach 1:
The invention changes the physical parameters of cellulose fibers by controlling fiber length (0.1-10 mm) and fibrillation ratio (5-50%), transforming cellulose from nanofiber scale to microfiber scale. This parameter change reduces intermolecular hydrogen bonding and improves dispersibility in resin while maintaining reinforcing effects.
Solution Approach 2:
The invention segments cellulose fibers into controlled lengths and fibrillation ratios, creating a hierarchical structure that balances dispersibility and reinforcing capability. The segmentation prevents excessive aggregation while maintaining sufficient fiber integrity for strength enhancement.
2Strength
If cellulose nanofiber is used to form three-dimensional network in resin, then reinforcing effect is enhanced, but network formation becomes insufficient due to poor dispersibility
Solution Approach 1:
By optimizing fiber length to 0.1-10 mm and fibrillation ratio to 5-50%, the invention creates cellulose microfibers that can effectively form three-dimensional networks in resin. These parameters enable sufficient network formation without the aggregation problems of nanofibers.
Solution Approach 2:
The invention creates a composite structure combining cellulose microfibers with resin matrix, where the controlled fiber morphology enables effective three-dimensional network formation. The composite structure achieves synergistic reinforcement while maintaining proper dispersibility.
3Adaptability or versatility
If average fiber width is specified as 2 to 15000 nm, then a wide range of fiber sizes are included, but the range is too broad to provide meaningful guidance for achieving sufficient reinforcing effect
Solution Approach 1:
The invention refines the fiber dimension parameters to average fiber width of 1-100 μm and average fiber length of 0.1-10 mm, providing precise control ranges that enable consistent manufacturing of cellulose microfibers with optimal reinforcing properties.
Solution Approach 2:
The invention specifies local quality parameters including fibrillation ratio (5-50%) alongside dimensional parameters, creating a comprehensive specification system that ensures both manufacturing precision and functional performance of cellulose reinforcing materials.
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 fibrous cellulose composite resin with improved resin reinforcing effects, achieving high strength and mechanical properties while maintaining ductility.
Implementation Method 1
the cellulose nanofiber irreversibly aggregates due to an intermolecular hydrogen bond derived from a hydroxyl group of a polysaccharide
Data Source
AI summary
A fibrous cellulose having a high resin reinforcing effect and a method for manufacturing the same, and a fibrous cellulose composite resin having high strength and a method for manufacturing the same. A fibrous cellulose has an average fiber width of 0.1 μm or more, an average fiber length of 0.02 to 3.0 mm, and a fibrillation ratio of 1.0% or more. A kneaded product of this fibrous cellulose and a resin is formed into a fibrous cellulose composite resin. In manufacturing the fibrous cellulose, a raw material fiber is defibrated so as to have an average fiber width of 0.1 μm or more, an average fiber length of 0.02 to 3.0 mm, and a fibrillation ratio of 1.0% or more. The fibrous cellulose obtained by this method and a resin are kneaded to manufacture a fibrous cellulose composite resin.