Ionic Cellulose Derivatives for Inkjet Printing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cellulose materials have low solubility in solvents, making it difficult to prepare high concentration solutions and resulting in low dimensional accuracy and mechanical strength in shaped articles, especially when using methods like inkjet printing.
Innovation Solution
Incorporating an ionic moiety, such as an imidazolium salt structure, into cellulose derivatives to enhance solubility in polar solvents, allowing for higher concentration liquid compositions and improved ejection stability in inkjet methods, resulting in shaped articles with enhanced dimensional accuracy and mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cellulose is used to prepare liquid composition for shaped article production, then the material is environmentally friendly and biocompatible, but the solubility is low making it difficult to prepare high concentration solutions
Solution Approach 1:
The patent changes the chemical parameters of cellulose by introducing ionic moieties (such as imidazolium, pyridinium, or ammonium groups) at specific positions on the cellulose molecule. This chemical modification transforms cellulose from a poorly soluble natural polymer into a derivative with enhanced solubility in polar solvents, enabling preparation of high concentration solutions (e.g., 10-40% w/w) suitable for inkjet printing and other shaping processes.
Solution Approach 2:
The patent creates a composite structure at the molecular level by combining cellulose backbone with ionic functional groups. The resulting cellulosic material exhibits properties of both cellulose (biocompatibility, degradability) and ionic compounds (solubility in polar solvents, charge density), achieving a synergistic effect that resolves the solubility-concentration contradiction.
2Manufacturing precision
If high concentration cellulose solution is used to improve dimensional accuracy of shaped articles, then the mechanical strength improves, but the solubility and processability deteriorate
Solution Approach 1:
By modifying the chemical structure of cellulose to include ionic moieties, the patent changes the physical parameters of the material including solubility, viscosity, and processability. This enables the material to be processed at high concentrations (improving dimensional accuracy) while maintaining ease of manufacture through improved solubility and stability in liquid composition.
3Ease of manufacture
If cellulose is used in traditional paper products, then the material is easily processed and manufactured, but the advantageous characteristics of cellulose are not fully utilized
Solution Approach 1:
The patent transforms cellulose from a traditional paper-making material into a versatile platform for advanced applications by changing its chemical parameters. The introduction of ionic moieties enables new functionalities including inkjet printability, three-dimensional shaping, and enhanced mechanical properties, thereby expanding the adaptability of cellulose beyond traditional uses.
Solution Approach 2:
The modified cellulosic material achieves multi-functionality: it maintains the environmental benefits of cellulose while gaining improved solubility, enhanced mechanical strength, and compatibility with modern manufacturing processes like inkjet printing. This universal material can be applied in diverse fields including packaging, medical devices, and electronic components.
4Productivity
If inkjet method is used to shape cellulose materials, then the productivity is improved, but the ejection stability of composition containing cellulose is extremely difficult to achieve
Solution Approach 1:
The patent changes the rheological and chemical parameters of cellulose by introducing ionic moieties, which significantly improves the ejection stability of liquid composition in inkjet printing. The ionic groups enhance solubility and reduce aggregation, enabling stable droplet formation and consistent ejection, thereby making high-productivity inkjet shaping feasible with cellulosic 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
The use of cellulose derivatives with ionic moieties improves the solubility and mechanical properties of cellulose-based materials, enabling the production of shaped articles with higher dimensional accuracy and mechanical strength, while also simplifying the inkjet printing process.
Implementation Method 1
the solubility of the cellulose derivative in a polar solvent can be made more excellent
Data Source
AI summary
A cellulosic material contains a cellulose derivative, and the cellulose derivative contains an ionic moiety as a chemical structure common to an ionic liquid. It is preferred that the ionic moiety has an imidazolium salt structure. It is also preferred that the ionic moiety is introduced into a repeating unit of a polymer chain having a repeating structure introduced into a cellulose backbone structure of the cellulose derivative.