Polymer Complex with Surface-Fibrillated Microcellulose Fibers
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Solution Overview
Problem
The production of nanocellulose fibers is complicated and costly, and they tend to aggregate, limiting their dispersion and reinforcing effect in polymer complexes, which affects the mechanical properties of the resulting materials.
Innovation Solution
A polymer complex is developed using microcellulose fibers with nanofibrils and fine particles, where the microcellulose fibers are fibrillated by growing fine particles without nano-sizing, and then complexed with a polymer matrix, enhancing mechanical properties and dispersibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If nanocellulose fibers are produced through traditional nanosizing processes, then reinforcing effect is improved, but production complexity and cost increase
Solution Approach 1:
The invention segments the cellulose fiber structure into microcellulose fibers with surface-raised nanofibrils, achieving nanoscale reinforcing effects without requiring complete nanosizing of the entire fiber structure. This segmentation allows retention of microfiber integrity while incorporating nanoscale elements for reinforcement.
Solution Approach 2:
The invention performs preliminary fibrillation action during the microcellulose fiber formation stage, raising nanofibrils on the fiber surface before final fiber assembly. This preliminary action eliminates the need for subsequent complex nanosizing processes.
2Strength
If nanocellulose fibers are used as reinforcing material, then mechanical properties are improved, but dispersibility deteriorates due to aggregation
Solution Approach 1:
The invention applies local quality by concentrating nanofibrils only on the surface of microcellulose fibers rather than requiring complete nanosizing throughout. This localized nanofibril formation improves dispersibility while maintaining reinforcing capabilities at the fiber-matrix interface.
Solution Approach 2:
The invention creates a composite structure combining microcellulose fibers with surface-raised nanofibrils, achieving a hierarchical composite that combines the dispersibility advantages of microfibers with the reinforcing advantages of nanofibrils.
3Stability of the object's composition
If cellulose fibers are complexed with polymers at high temperature, then complexation is improved, but fiber deterioration increases
Solution Approach 1:
The invention changes the temperature parameter during complexation by utilizing the high surface area and reactivity of surface-raised nanofibrils, which enable effective polymer complexation at lower temperatures, thereby preventing fiber deterioration while achieving sufficient complexation.
Data Source
Figure 1(a)~1(d)
Figure 2~3
Figure 4
AI summary
The present disclosure relates to a polymer complex. According to the present disclosure, there is provided a polymer complex capable of exhibiting excellent mechanical properties while being environmentally friendly by including cellulose fibers as a reinforcing material.