Photoreceptor Protective Layer Composition for Solubility and Hardness
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Solution Overview
Problem
Existing compounds with electron transporting structures have insufficient solubility in organic solvents, mechanical strength, and electrical properties, leading to suboptimal performance in protective layers of electrophotographic photoreceptors.
Innovation Solution
A compound with a perylene diimide skeleton and specific side chains, or a combination of compounds with conjugated skeletons, is used to form a protective layer with improved solubility, mechanical strength, and electron transporting properties, enhancing the photoreceptor's electrical and mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If existing compounds with electron transporting structures are used to form a protective layer, then the photoreceptor can be manufactured, but the compound has insufficient solubility in organic solvents
Solution Approach 1:
The patent modifies the molecular structure of electron transporting compounds by changing parameters such as introducing specific side chains (e.g., alkyl groups with 4-20 carbon atoms) and modifying the core structure (triphenylamine, carbazole, oxadiazole units). These parameter changes improve solubility in organic solvents while maintaining or enhancing electrical properties like electron mobility and charge transport capability.
Solution Approach 2:
The patent creates composite protective layers by combining electron transporting compounds with hole transporting materials, resins, and other functional materials. This composite approach allows the protective layer to achieve both good solubility (through the resin matrix) and excellent electrical properties (through the synergistic combination of electron and hole transporting materials).
2Strength
If existing compounds with electron transporting structures are used to form a protective layer, then the photoreceptor can be manufactured, but the protective layer has insufficient mechanical strength
Solution Approach 1:
The patent forms composite protective layers by combining electron transporting compounds with hole transporting materials and resins. The resin component (e.g., polyurethane, epoxy, silicone) provides mechanical strength and structural integrity, while the electron transporting compound maintains electrical properties. This composite structure resolves the contradiction between mechanical strength and electrical performance.
Solution Approach 2:
The patent assigns different functions to different components within the protective layer: the resin provides mechanical strength and structural support, the electron transporting compound ensures electrical conductivity and charge transport, and the hole transporting material facilitates hole mobility. This local differentiation of quality allows each component to optimize its specific function without compromising overall 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 compound forms a protective layer with high hardness, elastic deformation rate, and excellent solubility, resulting in a photoreceptor with improved residual potential property and surface flatness.
Implementation Method 1
a compound having an electron transporting structure and at least three polymerizable functional groups in one molecule
Implementation Method 2
X represents a perylene diimide skeleton... the compound has electron transporting property
Implementation Method 3
The compound of the present invention has excellent solubility in organic solvents
Data Source
AI summary
The present disclosure relates to a compound having one or more polymerizable functional groups.