Polyimide Additive Manufacturing via Dual-Source Radiation Curing
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Solution Overview
Problem
Current 3D inkjet printing technologies face limitations in using polyimides due to their slow solidification time and inferior properties in additive manufacturing, particularly in achieving high thermal stability and mechanical properties.
Innovation Solution
A method involving the dispensing of a polyimide precursor formulation using a printing head with ultraviolet and infrared radiation to accelerate the curing process, allowing for the formation of polyimide layers with improved properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional 3D inkjet printing is used with polyimide materials, then the material can be deposited, but the solidification time is slow and mechanical properties are inferior
Solution Approach 1:
The patent applies preliminary action by incorporating photoinitiators and thermal curing agents into the polyimide formulation before printing. This allows the material to be pre-prepared for rapid curing, enabling fast solidification upon exposure to UV or thermal energy during the printing process, thereby resolving the contradiction between slow solidification and mechanical property development.
Solution Approach 2:
The patent changes the chemical and physical parameters of the polyimide formulation by incorporating specific photoinitiators, crosslinking agents, and adjusting molecular weight distribution. These parameter changes enable the material to transition from a slow-curing state to a rapidly curable state while maintaining or enhancing mechanical properties, thus resolving the time-quality contradiction.
2Temperature
If polyimide materials are used in additive manufacturing, then thermal stability can be achieved, but curing speed is slow
Solution Approach 1:
The patent introduces photoinitiators and thermal curing catalysts as intermediary substances that mediate between the polyimide precursor and the final cured structure. These intermediaries enable rapid curing through photopolymerization or catalyzed reactions, allowing the system to achieve both high thermal stability (inherent to polyimide) and fast curing speed (enabled by the intermediary agents).
Solution Approach 2:
The patent creates composite formulations by combining polyimide precursors with photoinitiators, crosslinking agents, and other functional additives. This composite approach allows the material to exhibit both the thermal stability characteristic of polyimide and the rapid curing properties provided by the photopolymerization or catalyzed reaction components, thus resolving the contradiction between thermal performance and curing speed.
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
This approach enables the rapid solidification and enhanced mechanical properties of polyimide-based 3D objects, overcoming the limitations of existing technologies by achieving faster curing and improved structural integrity.
Implementation Method 1
applying to the layer ultraviolet radiation and infrared radiation from two different radiation sources
Implementation Method 2
applying to the layer ultraviolet radiation and infrared radiation from two different radiation sources
Data Source
AI summary
A method of additive manufacturing of a three-dimensional object, comprises: dispensing from a first array of nozzles a modeling material formulation containing a polyimide precursor to form a layer in a configured pattern corresponding to a shape of a slice of the object; applying to the layer ultraviolet radiation and infrared radiation from two different radiation sources; and repeating the dispensing and the application of radiation to form a plurality of layers in configured patterns corresponding to shapes of other slices of the object. Optionally, an additional modeling material formulation or a support material formulation is dispensed from a second array of nozzles.