Cellulosic Material with Redox-Active Functional Groups
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Solution Overview
Problem
Cellulose materials are underutilized, with their advantageous characteristics not fully exploited, particularly in terms of hydrophilicity and hydrophobicity adjustment and ink removal after fixation.
Innovation Solution
A cellulosic material with a cellulose derivative containing a functional group capable of reversible redox reactions, such as ferrocene or viologen structures, is introduced, allowing for adjustable hydrophilicity or hydrophobicity and enabling ink removal through redox reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cellulose is used to produce paper products and fibers in the related art, then the material utilization is limited to conventional applications, but the advantageous characteristics of cellulose such as hydrophilicity and hydrophobicity are not fully utilized
Solution Approach 1:
The patent applies parameter changes by introducing functional groups capable of reversible redox reactions into the cellulose derivative. This allows the hydrophilicity/hydrophobicity balance to be dynamically adjusted through oxidation-reduction reactions, transforming cellulose from a static material into one with tunable properties. The functional groups undergo redox reactions that change their charge state, thereby altering the overall hydrophilicity of the cellulose derivative and enabling versatile applications beyond conventional paper and fiber products.
Solution Approach 2:
The patent creates a composite material structure by combining cellulose backbone with redox-active functional groups (such as ferrocene or viologen structures). This composite approach integrates the inherent advantages of cellulose (biocompatibility, degradability, abundance) with the dynamic properties of redox-active compounds, resulting in a material that exhibits both biological friendliness and adjustable hydrophilicity/hydrophobicity for expanded application possibilities.
2Ease of operation
If ink is fixed to a recording medium, then the recorded information is permanent, but the ink cannot be removed for repetitive recording or information erasure
Solution Approach 1:
The patent applies dynamics by incorporating redox-responsive functional groups into the cellulose derivative structure. These functional groups can reversibly switch between oxidized and reduced states, causing dynamic changes in the recording medium's surface properties. When the functional groups undergo redox reactions, they alter their charge and hydrophilicity, which enables the fixed ink to be released or removed. This dynamic behavior allows the recording medium to transition between ink-retention and ink-release states, facilitating both permanent recording and erasure/repetitive recording functions.
Solution Approach 2:
The patent enables discarding and recovering by using the redox reaction capability of the functional groups to control ink adhesion. In the oxidized state, the functional groups maintain strong ink fixation for permanent recording. When reduced, they release the ink, allowing for erasure and repetitive recording. This reversible process enables the system to discard fixed ink when needed while recovering the recording medium for reuse, balancing permanent fixation with erasability.
3Stability of the object's composition
If a functional group is introduced into cellulose through a double bond, then the degree of freedom of the functional group is limited, but this may cause deformation of the cellulosic member
Solution Approach 1:
The patent applies local quality by strategically introducing redox-functional groups at specific locations on the cellulose backbone (such as at the C6 position). This localized functionalization ensures that the redox reactions occur at controlled sites, minimizing unwanted side reactions and reducing the risk of deformation. The functional groups are positioned to participate in redox reactions while maintaining the overall structural integrity of the cellulose chain, thus balancing compositional stability with dimensional accuracy.
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 solution allows for effective adjustment of hydrophilicity or hydrophobicity in cellulosic materials and members, facilitating ink removal and enabling repetitive recording while ensuring mechanical strength and durability, making them suitable for recording media and confidential information storage.
Implementation Method 1
the cellulose derivative has a functional group capable of reversibly performing a redox reaction introduced thereinto
Data Source
AI summary
A cellulosic material contains a cellulose derivative, in which the cellulose derivative has a functional group capable of reversibly performing a redox reaction introduced thereinto. The cellulose derivative preferably has at least one of a ferrocene structure and a viologen structure as the functional group.