Halogenated Hole Transporting Polymer for Photosensitive Member Abrasion
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Solution Overview
Problem
Existing electrophotographic photosensitive members face issues with abrasion resistance and chemical stability, leading to image deletion, particularly in high humidity environments, due to the chemical changes of polymerized hole transporting compounds during electrophotographic processes.
Innovation Solution
Incorporating a polymerized product of a hole transporting compound with a polymerizable functional group, specifically designed to avoid arylamine structures and include halogen atoms like fluorine, which enhances chemical stability and reduces chemical changes, thereby improving abrasion resistance and suppressing image deletion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a high abrasion-resistant surface layer is provided using polymerized hole transporting compound, then abrasion resistance is improved, but chemical stability deteriorates leading to image deletion
Solution Approach 1:
The invention changes the chemical parameters of the hole transporting compound by introducing specific structural features: compounds with formula (1) containing sp3-hybridized carbon atoms and compounds with formula (2) containing nitrogen atoms in specific configurations. These parameter changes in molecular structure fundamentally alter the chemical stability while maintaining polymerizability and hole transporting capability, thereby resolving the contradiction between abrasion resistance and chemical stability.
Solution Approach 2:
The invention uses composite material strategy by combining hole transporting compounds with specific structural features (formulas (1) and (2)) with polymerizable functional groups. This creates a composite functional material that simultaneously achieves high abrasion resistance through polymerization and high chemical stability through the specific molecular structure, preventing the chemical degradation that causes image deletion.
2Strength
If polymerized product of hole transporting compound is used in surface layer, then abrasion resistance is improved, but surface layer cannot be refreshed leading to accumulation of chemical deteriorated-substances
Solution Approach 1:
The invention changes the chemical parameters of the hole transporting compound by introducing specific structural features: compounds with formula (1) containing sp3-hybridized carbon atoms and compounds with formula (2) containing nitrogen atoms in specific configurations. These parameter changes in molecular structure fundamentally alter the chemical stability while maintaining polymerizability and hole transporting capability, thereby resolving the contradiction between abrasion resistance and chemical stability.
Solution Approach 2:
The invention applies the principle of using stable, durable materials that resist degradation over time. By designing hole transporting compounds with exceptional chemical stability through specific molecular structures, the surface layer becomes effectively 'long-living' and resistant to the accumulation of deteriorated substances, even though it maintains high abrasion resistance and cannot be easily refreshed.
3Ease of operation
If conventional hole transporting compound is used, then electrophotographic function is achieved, but chemical change occurs during repeated stress application
Solution Approach 1:
The invention changes the chemical parameters of the hole transporting compound by introducing specific structural features: compounds with formula (1) containing sp3-hybridized carbon atoms and compounds with formula (2) containing nitrogen atoms in specific configurations. These parameter changes in molecular structure fundamentally alter the chemical stability while maintaining polymerizability and hole transporting capability, thereby resolving the contradiction between abrasion resistance and chemical stability.
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 provides an electrophotographic photosensitive member with enhanced abrasion resistance and chemical stability, effectively preventing image deletion and maintaining high electrical properties, even in challenging environmental conditions.
Implementation Method 1
a surface layer of the electrophotographic photosensitive member contains a polymerized product of a hole transporting compound having a polymerizable functional group
Data Source
AI summary
To provide an electrophotographic photosensitive member which satisfies abrasion resistance and electrical properties and which is difficult to cause image deletion. A surface layer of the electrophotographic photosensitive member of this invention contains a polymerized product of a hole transporting compound having a polymerizable functional group, in which the hole transporting compound is at least one compound selected from the group consisting of:a compound consisting of one or more carbon atoms, one or more hydrogen atoms, and one or more halogen atoms; and a compound consisting of one or more carbon atoms, one or more hydrogen atoms, one or more oxygen atoms, and one or more halogen atoms.