Cellulose Nanofiber Absorbent Composition with Viscous Derivative
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dry cellulose nanofibers have low dispersibility in water due to high aggregation liability, which limits their absorption performance in absorbent applications.
Innovation Solution
An absorbent composition comprising cellulose nanofibers and a cellulose derivative with specific viscosity and degree of etherification, mixed and dried to enhance dispersibility and absorption capacity, with a preferred ratio of cellulose nanofibers to cellulose derivative for improved absorption performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dry cellulose nanofibers are used, then absorption performance is improved, but dispersibility in water deteriorates due to high aggregation liability
Solution Approach 1:
The patent introduces a water-soluble polymer as an intermediary substance that mediates between the cellulose nanofibers and water. This polymer prevents aggregation of nanofibers while maintaining their absorption capabilities, effectively resolving the contradiction between good dispersibility and high absorption performance
Solution Approach 2:
The patent creates a composite material system consisting of cellulose nanofibers combined with water-soluble polymers. This composite approach allows the system to simultaneously achieve the dispersibility of the polymer component and the absorption performance of the nanofiber component, resolving the technical contradiction
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 composition exhibits excellent absorption performance, capable of retaining a significant amount of water and suitable for use in absorbent articles like diapers, with enhanced dispersibility and absorption capacity.
Implementation Method 1
the cellulose derivative having a viscosity of 1000 mPa·s or higher as measured in a 1 mass % aqueous solution at 25° C.
Implementation Method 2
The composition exhibits excellent absorption performance, capable of retaining a significant amount of water
Data Source
AI summary
An absorbent composition containing cellulose nanofibers and a cellulose derivative and a method for making the same are disclosed. The cellulose derivative has a viscosity of 1000 mPa·s or higher in a 1 mass % aqueous solution at 25° C. and a degree of etherification of less than 0.9. The cellulose derivative is preferably at least one member selected from the group consisting of carboxymethyl cellulose, carboxyethyl cellulose, a carboxymethyl cellulose salt, and a carboxyethyl cellulose salt, more preferably a carboxymethyl cellulose salt, even more preferably sodium carboxymethyl cellulose.