Anionic Cellulose Nanofiber Powder for Stable Redispersion
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Solution Overview
Problem
Dried cellulose nanofiber powders exhibit variability in redispersion time and dispersibility due to particle size, water content, and bulk density variations, leading to inconsistent performance in applications.
Innovation Solution
Forming a powder with specific particle size, bulk density, and particle size distribution sharpness, along with controlled water content, to ensure consistent and efficient redispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cellulose nanofibers are dried to form a dried product, then packaging, storage, and transportation costs are reduced, but redispersion time becomes variable and dispersibility deteriorates
Solution Approach 1:
The patent applies preliminary action by controlling particle size (1-500 μm) and bulk density (0.2-0.55 g/cm³) during the drying process to pre-establish optimal redispersion characteristics. This preliminary optimization of physical parameters ensures that when water is added later, the nanofibers redisperse quickly and uniformly without forming lumps, thus reducing variable redispersion time while maintaining the cost benefits of dried storage
Solution Approach 2:
The patent employs parameter changes by precisely controlling multiple parameters including particle size distribution, bulk density, and water content (≤20% by mass) of the dried powder. By optimizing these parameters within specific ranges, the patent achieves a balance where the dried powder maintains low cost for storage and transportation while simultaneously achieving consistent and rapid redispersion performance
2Quantity of substance
If cellulose nanofibers are dried to form a dried solid, then water required for stability is reduced, but hydrogen bonds form between fibers causing poor redispersion
Solution Approach 1:
The patent applies preliminary action by controlling particle size (1-500 μm) and bulk density (0.2-0.55 g/cm³) during the drying process to pre-establish optimal redispersion characteristics. This preliminary optimization of physical parameters ensures that when water is added later, the nanofibers redisperse quickly and uniformly without forming lumps, thus reducing variable redispersion time while maintaining the cost benefits of dried storage
Solution Approach 2:
The patent employs parameter changes by precisely controlling multiple parameters including particle size distribution, bulk density, and water content (≤20% by mass) of the dried powder. By optimizing these parameters within specific ranges, the patent achieves a balance where the dried powder maintains low cost for storage and transportation while simultaneously achieving consistent and rapid redispersion performance
3Ease of manufacture
If powder particle size and bulk density are not controlled, then manufacturing simplicity is maintained, but redispersion consistency deteriorates
Solution Approach 1:
The patent applies preliminary action by controlling particle size (1-500 μm) and bulk density (0.2-0.55 g/cm³) during the drying process to pre-establish optimal redispersion characteristics. This preliminary optimization of physical parameters ensures that when water is added later, the nanofibers redisperse quickly and uniformly without forming lumps, thus reducing variable redispersion time while maintaining the cost benefits of dried storage
Solution Approach 2:
The patent employs parameter changes by precisely controlling multiple parameters including particle size distribution, bulk density, and water content (≤20% by mass) of the dried powder. By optimizing these parameters within specific ranges, the patent achieves a balance where the dried powder maintains low cost for storage and transportation while simultaneously achieving consistent and rapid redispersion performance
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 anionically modified cellulose nanofiber powder achieves uniform redispersion with minimal time variation and excellent dispersibility, enhancing handling and application efficiency.
Implementation Method 1
When an aqueous dispersion of cellulose nanofibers is dried to form a dried solid, hydrogen bonds are formed between fibers of fine cellulose fibers
Data Source
AI summary
A powder containing an anionically modified cellulose nanofiber having an average fiber diameter of 3 nm to 500 nm, in which the powder has a water content of less than or equal to 20% by mass, an average particle size of 1 to 500 µm, a loose bulk density of 0.2 to 0.55 g/cm3, and a particle size distribution sharpness of 1.6 to 2.9.