Electrospun Fiber-Reinforced Ceramic Composites with Gel Dispersion
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Solution Overview
Problem
Existing methods for incorporating electrospun fibers into ceramic composites fail to fully utilize their advantages due to the compact nature of non-woven mats, limited dispersibility, and strict experimental requirements, leading to diminished flexibility and ineffective dispersion within the matrix.
Innovation Solution
The method involves electrospinning organic polymer fibers into a liquid or gel collector, where ceramic precursors are added to form a solid ceramic matrix around the fibers, using techniques like wet-electrospinning and Immersed Electro-Hydrodynamic Direct-Writing (I-EHD), allowing for high dispersibility and uniform distribution of fibers in the ceramic matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional electrospinning with solid collectors is used, then fibers can be collected as non-woven mats, but the compact nature of the mats diminishes fiber flexibility and prevents effective dispersion in the matrix
Solution Approach 1:
The patent introduces a liquid or gel collector as an intermediary medium between the electrospinning process and the final ceramic matrix. This liquid/gel collector receives the electrospun fibers in a dispersed state, preventing the compact mat formation that occurs with solid collectors. The liquid/gel medium maintains fiber flexibility and enables uniform distribution, which is then preserved during subsequent ceramic matrix formation through gel-casting or slurry mixing processes.
2Adaptability or versatility
If mechanical cutting or ultrasonication is used to create short electrospun fiber reinforcement, then fibers can be incorporated into composites, but strict experimental requirements are needed and dispersibility is limited
Solution Approach 1:
The patent performs preliminary dispersion of electrospun fibers in a liquid or gel collector before the ceramic matrix formation process. By establishing uniform fiber distribution in the liquid/gel medium beforehand, the need for complex post-processing steps like mechanical cutting or ultrasonication is eliminated. This preliminary dispersion action simplifies the overall experimental protocol while ensuring good fiber distribution in the final composite.
3Ease of operation
If wet-electrospinning with liquid bath collector is used, then fibers achieve loose packed structures with high dispersibility, but this approach has not been explored in composite manufacturing
Solution Approach 1:
The patent extends the application of wet-electrospinning from its traditional use in tissue engineering to composite manufacturing. By demonstrating that liquid bath collectors can effectively disperse electrospun fibers and that these dispersed fibers can be successfully integrated into ceramic matrices through gel-casting or slurry mixing, the patent makes this technique universally applicable across different fields, including composite materials manufacturing.
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 results in ceramic composites with improved mechanical properties, such as increased hardness, elastic response, fracture toughness, and reduced porosity, suitable for applications requiring tough and lightweight materials.
Implementation Method 1
Electrospinning is a versatile and efficient approach for generating micro- and nano-fibers with extremely high aspect ratios and surface areas
Implementation Method 2
the adoption of a liquid bath collector has been exploited for the purpose of expediting the coagulation of fibers
Implementation Method 3
curing the inorganic ceramic precursors and the curing agent to form an organic polymer fiber-reinforced ceramic
Data Source
AI summary
Methods for the production of ceramic composites in which three-dimensional (3D) printed organic polymer fibers are embedded in an amorphous inorganic ceramic matrix are provided. The composites are made by electrospinning the organic polymer fibers and collecting them in a liquid or gel collector. Ceramic precursors added to the liquid collector after the fibers are collected, or present in the gel collector during the electrospinning, are then cured to form a solid ceramic matrix around the organic polymer fibers to produce an organic polymer fiber-reinforced ceramic.