Bismuth-Melanin Composite Radiation Shielding

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing radiation shielding materials, such as lead, are heavy and toxic, posing challenges for effective and safe radiation protection, particularly in medical and emergency contexts.

Innovation Solution

A bismuth-melanin composite is developed, which absorbs x-rays and other forms of radiation as effectively as lead but with a significantly lower weight and toxicity, utilizing a combination of bismuth oxide and melanin that is non-toxic and can be used in pharmaceutical compositions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If lead is used for radiation shielding, then radiation absorption effectiveness is improved, but weight and toxicity increase

Engineering Contradiction:

Improveradiation absorption effectivenessVSAvoidweight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent uses a composite material consisting of bismuth oxide nanoparticles combined with melanin polymer. This composite achieves lead-equivalent radiation shielding effectiveness while reducing density and weight. The bismuth oxide provides the necessary atomic number for photon interaction, while melanin provides structural framework and reduces overall density.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the material parameters by using bismuth oxide (atomic number 83) instead of lead (atomic number 82), combined with organic melanin polymer. This parameter change maintains the K-edge energy for photon absorption while reducing density from 11.34 g/cm³ (lead) to approximately 5.21 g/cm³ (bismuth-melanin composite).

Inventive Principle:

Principle #35Parameter changes

2Reliability

If lead is used for radiation shielding, then radiation absorption effectiveness is improved, but toxicity increases

Engineering Contradiction:

Improveradiation absorption effectivenessVSAvoidtoxicity

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent creates a composite where bismuth oxide nanoparticles are embedded in melanin polymer matrix. This composite structure maintains radiation shielding effectiveness while eliminating the severe toxicity associated with lead. Both bismuth and melanin are biocompatible materials with established safety profiles.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent replaces toxic lead with biocompatible bismuth-melanin composite that can be safely administered. The material is designed to be non-toxic and biodegradable, eliminating long-term toxicity concerns associated with lead exposure.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Weight of moving object

If bismuth-melanin composite is used for radiation shielding, then weight is reduced, but manufacturing complexity increases

Engineering Contradiction:

ImproveweightVSAvoidmanufacturing complexity

Core Design Contradiction:

Weight of moving objectVSDevice complexity

Solution Approach 1:

The patent segments the bismuth oxide into nanoparticles (1-100 nm size range) and combines them with melanin polymer. This segmentation allows for easier dispersion and integration into the polymer matrix, simplifying the manufacturing process while maintaining high radiation shielding effectiveness.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses melanin polymer as an intermediary carrier that facilitates the incorporation and uniform distribution of bismuth oxide nanoparticles. This intermediary approach simplifies manufacturing by providing a ready-made polymer matrix that can be easily processed into various forms.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 bismuth-melanin composite provides equivalent radiation shielding to lead while reducing weight and toxicity, making it suitable for various applications, including medical shielding and treatment of radiation poisoning.

Implementation Method 1

a bismuth-melanin combination which absorbs x-rays (medical quality), and other forms of radiation

Methodology Applied

Scientific EffectPhotoelectric absorption: Absorption (EM radiation)

Implementation Method 2

absorbs gamma rays at least twice as well as lead

Methodology Applied

Scientific EffectCompton scattering: Compton Scattering

Implementation Method 3

based on fungal melanin's chelating activity with nanoparticles of bismuth, lead, and silver

Methodology Applied

Scientific EffectChelation: Chemical Bonding

Data Source

PatentUS20250032505A1Methods And Compositions For Radioprotection

Publication Date: 2025.01.30 BARANOWITZ STEVEN

AI summary

Provided herein are compositions and methods for radioprotection. A pharmaceutical composition comprising: a therapeutically effective amount of a bismuth-melanin composite, pharmaceutically acceptable salts thereof, and combinations thereof; and at least one pharmaceutically acceptable excipient and methods for the treatment and/or prevention of acute radiation syndrome (ARS) in a subject in need thereof comprising administering the composition.