Multilayer Radiation Shielding Composite for Space Structural Panels
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Solution Overview
Problem
Existing materials lack comprehensive protection against radiation, physical damage, and thermal stress in space environments, failing to meet the stringent requirements for space travel and habitation beyond Earth's atmosphere.
Innovation Solution
A composite multifunctional material comprising layers of thermoplastic polymers doped with boron or lithium compounds, metal/metal oxide layers, and structural layers, designed to provide radiation shielding, structural support, and protection against atomic oxygen, micrometeoroids, and thermal stress, manufactured through 3D printing or traditional molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional aluminum or plastic panels are used for interior vehicle trim, then manufacturing cost and ease of manufacture are improved, but radiation shielding capability deteriorates
Solution Approach 1:
The patent applies composite materials by combining aluminum alloy substrate with radiation-absorbing particles (bismuth oxide, tungsten oxide, or manganese dioxide) dispersed within a polymer matrix. This composite structure provides both the structural integrity of metal and the radiation shielding properties of high-Z materials, resolving the contradiction between ease of manufacture and radiation shielding capability.
Solution Approach 2:
The patent changes the chemical composition parameters of the shielding layer by incorporating specific ratios of radiation-absorbing particles (20-80 wt%) combined with polymers and coupling agents. This parameter optimization enables the material to achieve effective radiation attenuation while maintaining processability and manufacturing feasibility.
2Object-affected harmful factors
If lead or depleted uranium are used for radiation shielding, then radiation shielding capability is improved, but weight and toxicity worsen
Solution Approach 1:
The patent applies local quality by distributing radiation-absorbing particles selectively within specific regions of the panel structure rather than using homogeneous dense materials throughout. The particles are concentrated in the shielding layer where radiation protection is needed, while other structural regions maintain lighter composition, thus reducing overall weight while preserving radiation shielding capability.
Solution Approach 2:
The patent replaces expensive, toxic, and dense materials like lead and depleted uranium with lighter, non-toxic alternatives such as bismuth oxide, tungsten oxide, and manganese dioxide combined with polymers. These alternative materials provide comparable radiation shielding with reduced weight and environmental hazards.
3Object-affected harmful factors
If lead or depleted uranium are used for radiation shielding, then radiation shielding capability is improved, but ease of disposal and environmental impact worsen
Solution Approach 1:
The patent replaces toxic materials like lead and depleted uranium with non-toxic or low-toxicity alternatives including bismuth oxide, tungsten oxide, and manganese dioxide combined with polymer matrices. These materials can be more easily disposed of or recycled without severe environmental contamination, while maintaining effective radiation shielding properties.
Solution Approach 2:
The patent converts the harmful toxicity and environmental persistence of traditional shielding materials into beneficial properties by selecting alternatives that are less toxic, more environmentally friendly, and potentially recyclable. The high-Z radiation-absorbing particles are combined with biocompatible polymers to create a shielding material that protects against radiation while minimizing harmful environmental impacts.
4Object-affected harmful factors
If radiation shielding panels are added to vehicle interiors, then radiation shielding capability is improved, but structural strength and rigidity may deteriorate
Solution Approach 1:
The patent applies composite materials by creating a multi-layer structure where an aluminum alloy substrate provides structural strength and rigidity, while a separate shielding layer containing radiation-absorbing particles provides radiation protection. The coupling agent ensures strong interfacial bonding between layers, preventing delamination and maintaining overall structural integrity despite the addition of the shielding function.
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 composite material effectively shields against various types of radiation, including charged particles, photons, and thermal neutrons, while offering structural support and protection against atomic oxygen, micrometeoroids, and thermal stress, meeting the demands of space travel and habitation.
Implementation Method 1
a radiation absorbing particle dispersed in a polymer matrix
Data Source
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AI summary
A composite material comprising a first shielding layer (210); at least one metal containing layer (208) over the first shielding layer; and a second shielding layer (206) over said at least one metal containing layer opposite of the first shielding layer; wherein the first shielding layer (210) and the second shielding layer (206) each and/or in combination with other layers of the composite material provide the composite material with radiation shielding characteristics.