Porous Microsphere Flame Spheroidisation for Uniform High Yield
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Solution Overview
Problem
Existing methods for manufacturing porous microspheres are unsatisfactory in terms of yield, sphericity, and uniformity, and are often time-consuming and lack reproducibility.
Innovation Solution
A method involving the use of a feed powder mixed with blowing agents and subjected to a spheroidisation flame to produce porous microspheres, with controlled flame temperature and residence time, allowing for the production of uniform, spherical microspheres with controlled porosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to manufacture porous microspheres, then production can proceed with existing processes, but the yield is poor and sphericity and porosity are inconsistent
Solution Approach 1:
The patent applies parameter changes by controlling flame temperature, residence time, and feed powder characteristics to achieve consistent microsphere formation. By optimizing these parameters, the process produces microspheres with uniform sphericity and porosity while maintaining high yield, resolving the contradiction between manufacturing precision and productivity
Solution Approach 2:
The patent segments the manufacturing process into distinct controlled stages: feed powder preparation with specific size ranges (30-500 μm), controlled blending with blowing agents, and staged flame exposure. This segmentation allows each parameter to be optimized independently, achieving both high yield and consistent quality
2Reliability
If conventional manufacturing methods are used, then existing equipment can be utilized, but the process is time-consuming and lacks reproducibility
Solution Approach 1:
The patent implements preliminary action by pre-characterizing feed powder properties (particle size, morphology, composition) and pre-determining optimal flame parameters before production. This preparation ensures that each batch starts with known parameters, enabling reproducible results and reducing trial-and-error time
Solution Approach 2:
The patent employs feedback mechanisms by monitoring microsphere formation characteristics during flame exposure and adjusting process parameters accordingly. This real-time feedback ensures consistent reproduction of desired microsphere properties across multiple batches while maintaining efficient production timing
3Manufacturing precision
If multiple pre- and post-processing steps are applied, then microsphere properties can be adjusted, but the process complexity increases and time consumption rises
Solution Approach 1:
The patent merges multiple functions into the flame exposure step itself. The flame process simultaneously achieves spheroidization, porosity creation through blowing agent decomposition, and surface conditioning. This consolidation eliminates the need for separate pre- and post-processing steps, reducing complexity while maintaining manufacturing precision
Solution Approach 2:
The patent uses parameter changes within the flame process to achieve multiple objectives. By adjusting flame temperature, residence time, and fuel-to-oxidant ratio, the process controls microsphere size, porosity, and surface properties in a single integrated step, avoiding the need for multiple separate processing operations
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 method achieves high yields of uniformly spherical microspheres with desired porosity characteristics, enhancing their suitability for applications such as bone tissue regeneration and environmental filtration.
Implementation Method 1
applying at least one spheroidisation flame to the mixture, so as to produce the powder
Implementation Method 2
mixing the feed powder with one or more blowing agents to provide a mixture comprising feed powder particles and particles of one or more blowing agents
Data Source
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AI summary
A method of manufacture of a powder comprising, or consisting essentially of, microspheres, the method comprising: providing a feed powder; and applying at least one spheroidisation flame to the powder. The powder may be suitable for use in medical and/or non-medical applications.