Hard Shell Microencapsulated Latent Heat Transport Materials
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Solution Overview
Problem
Conventional microencapsulated latent heat materials face challenges with mechanical strength and heat resistance, making it difficult to recover and transport high-temperature waste heat effectively.
Innovation Solution
Development of hard shell microencapsulated latent heat transport materials using non-porous hollow silica particles coated with silica, which encapsulate phase change materials capable of phase transitions up to 600 °C, enhancing mechanical strength and heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional microencapsulated latent heat materials are used, then heat transportation is enabled, but mechanical strength and heat resistance are insufficient for high-temperature applications
Solution Approach 1:
The patent employs a composite shell structure combining silica (inorganic) and polymer (organic) materials. The silica component provides high-temperature stability and mechanical strength, while the polymer component ensures encapsulation integrity. This composite approach resolves the contradiction by integrating materials with complementary properties to achieve both heat resistance and mechanical strength simultaneously.
Solution Approach 2:
The patent modifies the shell composition parameters by incorporating silica particles into the polymer matrix, changing the material parameters to enhance thermal stability. By adjusting the silica content and distribution, the shell can withstand high temperatures while maintaining structural integrity, thus resolving the contradiction between heat resistance and mechanical strength.
2Reliability
If polymer shells are used for microencapsulation, then latent heat material containment is achieved, but mechanical strength and heat resistance deteriorate at high temperatures
Solution Approach 1:
The patent creates a hybrid shell system where silica particles are embedded in a polymer matrix. The silica provides thermal stability and structural support at high temperatures, while the polymer ensures proper encapsulation of the latent heat material. This composite structure maintains containment integrity even when exposed to elevated temperatures that would degrade pure polymer shells.
Solution Approach 2:
The patent applies different material properties to different regions of the shell. The silica-rich regions provide heat resistance and structural strength, while the polymer-rich regions ensure encapsulation functionality. This local differentiation of material quality allows the shell to simultaneously achieve containment integrity and heat resistance.
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 hard shell microencapsulated latent heat transport materials can efficiently recover and transport high-temperature waste heat, offering improved mechanical strength and heat resistance, enabling applications in various temperature ranges and environments.
Implementation Method 1
a latent heat material that changes its phase from solid to liquid by melting at a desired temperature
Implementation Method 2
the phase change material inside the non-porous hollow silica particle does not include a super cooling prevention agent and has a super cooling degree smaller than that of the phase change material
Implementation Method 3
hard shell microencapsulated latent heat transport materials using non-porous hollow silica particles coated with silica, which encapsulate phase change materials capable of phase transitions up to 600 °C, enhancing mechanical strength and heat resistance
Implementation Method 4
non-porous hollow silica particles encapsulating a phase change material
Data Source
Figure 1
Figure 2(a)~2(f)
Figure 3~4
AI summary
Provided is a latent heat transfer material that is micro-encapsulated, said material exhibiting superior mechanical strength and heat resistance. A production method for the latent heat transfer material that is micro-encapsulated in a hard shell comprises: 1) a step in which a perforate hollow silica particle is manufactured; 2) a step in which the phase change material is sealed inside the perforate hollow silica particle by inserting the perforate hollow silica particle in a molten solution of the phase change material and repeatedly subj ecting the same to vibrations such as ultrasound oscillations; 3) a step in which the perforate hollow silica particle having the phase change material sealed within is washed in a saturated aqueous solution of the phase change material; and 4) a step in which perhydropolysilazane is used to coat the outer shell of the perforate hollow silica particle with silica.