Micro cellulose fiber complex
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Solution Overview
Problem
Conventional resin compositions containing fine cellulose fibers lack sufficient transparency and mechanical strength, and existing methods do not adequately address both requirements simultaneously.
Innovation Solution
A fine cellulose fiber composite is developed, where fine cellulose fibers are connected with an ethylene oxide/propylene oxide (EO/PO) copolymer moiety or a propylene oxide (PO) polymer moiety via an amide bond, enhancing dispersibility and affinity within a resin, thereby achieving improved transparency and mechanical strength when blended with thermoplastic or curable resins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If fine cellulose fibers are used in resin compositions, then mechanical strength is improved, but transparency deteriorates
Solution Approach 1:
The cellulose fibers are segmented into fine dimensions with an average fiber size of 0.1 to 200 nm, transforming bulk cellulose into nanoscale fibers that can disperse uniformly in resin without significantly blocking light transmission, thus maintaining transparency while providing reinforcement
Solution Approach 2:
The patent creates a composite material system where fine cellulose fibers are combined with specific resin matrices through surface modification. The fibers are treated with silane coupling agents or other surface treatments to improve interfacial adhesion, enabling the composite to achieve both enhanced mechanical strength and maintained transparency through optimized phase distribution
2Strength
If fine cellulose fibers are added to resin compositions, then mechanical strength is improved, but aggregate formation increases
Solution Approach 1:
The patent controls critical parameters including fiber aspect ratio (length to diameter ratio), surface chemistry, and dispersion concentration. By optimizing these parameters—specifically maintaining aspect ratios within certain ranges and controlling fiber surface energy through modification—the patent achieves uniform dispersion that prevents aggregation while maximizing reinforcement efficiency
Solution Approach 2:
Surface modification agents such as silane coupling agents, surfactants, or polymer coatings are introduced as intermediaries between the cellulose fibers and the resin matrix. These intermediaries improve interfacial compatibility and adhesion, preventing fiber aggregation and ensuring uniform stress transfer, thereby maintaining compositional stability while enhancing mechanical properties
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 composite provides resin compositions with enhanced mechanical strength, transparency, heat resistance, and dimensional stability, while minimizing aggregate formation when used with plasticizers or thermoplastic/curable resins.
Implementation Method 1
fine cellulose fibers being connected with the polymer via an amide bond
Data Source
AI summary
A fine cellulose fiber composite containing fine cellulose fibers and a polymer having an ethylene oxide/propylene oxide (EO/PO) copolymer moiety or a propylene oxide (PO) polymer moiety, the fine cellulose fibers being connected with the polymer via an amide bond. The fine cellulose fiber composite of the present invention has high dispersibility in the resin and can exhibit an effect of increasing strength, so that the fine cellulose fiber composite is suitably used as various fillers, and the like. Also, the resin composition of the present invention containing a dispersion of the fine cellulose fiber composite can be suitably used in various industrial applications such as daily sundries, household electric appliance parts, wrapping materials for household electric appliance parts, and automobile parts.