# US 2019/0378628 A1 · Method for developing radiation shielding compositions

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- Number: US 2019/0378628 A1
- Document ID: US20190378628A1
- Status: Published application
- Kind: A1
- Application number: 16/003,034
- Filed: 2018-06-07
- Published: 2019-12-12
- Earliest claimed: 2018-06-07
- Assignees: King Saud University
- Applicants: King Saud University
- Inventors: SALAH UD-DIN KHAN; SAJJAD HAIDER; USMA ALI RANA
- Web page: https://patentgrep.com/patent/US20190378628A1

## CPC

- G21F 1/106: {metallic dispersions}
- C08K 3/08: Metals
- C08K 2003/0837: {Bismuth}
- C08K 2201/001: Conductive additives
- G21F: PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR (radiation protection by pharmaceutical means A61K8/00, A61Q17/04; in cosmonautic vehicles B64G1/54; combined with a reactor G21C11/00; combined with X-ray tubes H01J35/16; combined with X-ray apparatus H05G1/02)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A computational method for development of radiation shielding compositions, as described herein, can include selecting at least one polymer and at least one metal for each of a plurality of radiation shielding compositions, selecting a polymer:metal ratio for each composition, performing computational analysis to calculate an attenuation coefficient associated with a given radiation dose for each composition, identifying a best candidate composition for radiation shielding based on the calculated attenuation coefficients, and preparing a radiation shielding material including the at least one polymer, the at least one metal, and the polymer metal ratio associated with the best candidate composition.

## Claims

### Claim 1

A method for development of radiation shielding compositions, comprising the steps of:
performing computational analysis on a computer to calculate a gamma radiation attenuation coefficient for at least nine distinct compositions, each of the compositions having a polymer matrix and functionalized particles of a single metal homogeneously dispersed in the polymer matrix in concentrations of 2%, 4%, 6%, 8%, and 10% w/w, respectively, in order to determine a concentration of the metal in the polymer matrix resulting in a maximum attenuation coefficient, thereby identifying the composition with optimal radiation shielding, wherein the polymer matrix comprises a polymer selected from the group consisting of polyacrylonitrile, polyethylene, and polyparaphenylene terephthalamide and the metal particles are selected from the group consisting of lead, gadolinium, and bismuth;
preparing a radiation shielding material using the composition identified as having optimal radiation shielding by computational chemistry; and
repeating the steps of performing computational analysis and preparing a radiation shielding material for metals having radiation attenuating properties and having different toxicities and different weight, wherein the repetitive steps are performed and calculated for a plurality of energy levels, the energy levels range from 3,000 MeV to 50,000 MeV.

### Claim at position 2

2-18. (canceled)

### Claim 19 (depends on 1)

The method for development of radiation shielding compositions according to claim 1, further comprising displaying the calculated attenuation coefficients for each of the compositions at each of the concentrations and at each of the energy levels.