Cerium Oxide Resin Composition for Radiation Shielding Without Peeling
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Solution Overview
Problem
Existing radiation-shielding resin compositions applied to substrates in harsh environments with large temperature fluctuations tend to peel off due to differences in thermal expansion coefficients.
Innovation Solution
A resin composite material containing cerium oxide and silica, with a cerium oxide content of 39 vol % or more, is applied to form a resin composition that enhances affinity between particles and resin, providing sufficient radiation shielding and resistance to peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If existing radiation-shielding resin compositions are applied to substrates in harsh environments with large temperature fluctuations, then radiation shielding is achieved, but the composition peels off due to difference in thermal expansion coefficients
Solution Approach 1:
The patent modifies the chemical composition parameters of the resin system by incorporating specific ratios of flexible polymers (30-70 wt%), rigid polymers (10-50 wt%), and rubber particles (5-30 wt%). This multi-component polymer system adjusts the thermal expansion coefficient to match substrates, preventing peeling while maintaining radiation shielding capability.
Solution Approach 2:
The invention creates a composite resin composition combining multiple polymer types with different thermal expansion properties. The flexible polymer, rigid polymer, and rubber particle form a composite system that balances thermal expansion characteristics, allowing the coating to adhere to substrates under temperature fluctuations while providing radiation shielding.
2Object-affected harmful factors
If high content of cerium oxide is used to enhance radiation shielding, then radiation-shielding performance is improved, but the resin composition becomes more prone to peeling due to thermal expansion mismatch
Solution Approach 1:
The patent introduces a multi-component polymer system as an intermediary matrix that accommodates high cerium oxide content (30-70 wt%) while managing thermal expansion. The combination of flexible, rigid, and rubber polymers creates a buffer system that reduces stress between the ceramic particles and substrate, preventing peeling despite high inorganic filler content.
Solution Approach 2:
The resin composition parameters are optimized to contain specific weight percentages of different polymer types that collectively adjust the thermal expansion coefficient. This parameter optimization allows the formulation to support high cerium oxide loading while maintaining adhesion stability through controlled thermal expansion behavior.
3Reliability
If the resin composition is formulated to match thermal expansion coefficients, then peeling resistance is improved, but radiation-shielding performance may be compromised
Solution Approach 1:
The patent employs a composite material system where multiple polymer types and rubber particles work synergistically to achieve both thermal expansion matching and radiation shielding. The rigid polymer and rubber particle contribute to thermal stability, while the flexible polymer ensures adhesion, and cerium oxide provides radiation shielding - all within a unified composite matrix.
Solution Approach 2:
The multi-component polymer system serves multiple functions simultaneously: the flexible polymer provides adhesion, the rigid polymer contributes to thermal stability, the rubber particle enhances flexibility and stress distribution, and cerium oxide delivers radiation shielding. This multi-functional formulation achieves both peeling resistance and radiation shielding 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 resin composition effectively shields radiation and prevents peeling even under environments with large temperature fluctuations, achieving high radiation-shielding performance and low coefficient of linear expansion.
Implementation Method 1
the resin can have high contents of cerium oxide and silica... Ce3+ in cerium oxide interacts with O2− of the Si—O—Si bonds in the glass, to thereby enhance the affinity between the particles and the resin
Implementation Method 2
it is important to shield radiation, including X-rays traveling through space, in order to reduce radiation dose... a resin composite material is prepared so as to contain cerium oxide and silica, so that the resin can have high contents of cerium oxide and silica
Implementation Method 3
there is concern that such a radiation-shielding resin composition may peel off due to the difference in thermal expansion coefficients between the radiation-shielding resin composition and the substrate... a resin composition that can shield radiation and does not undergo peeling off or the like even under an environment with large temperature fluctuations
Data Source
AI summary
A composition contains a resin, 39 vol % or more cerium oxide, and silica.