Title:
PREPARATION METHOD FOR TUNGSTEN/GADOLINIUM OXIDE PU COATING FABRIC WITH CORE-SHELL STRUCTURE FOR X AND Γ RAYS PROTECTION
Document Type and Number:
WIPO Patent Application WO/2022/166171
Kind Code:
A1
Abstract:
The present invention relates to a preparation method for a tungsten/gadolinium oxide PU coating fabric with a core-shell structure for X and γ rays protection. The method comprises the steps of formulating a dopamine salt solution, adding a buffer solution to adjust the pH value, then adding tungsten powder, followed by stirring, filtering, washing and drying to obtain W@PDA; adding the resulting W@PDA to a gadolinium nitrate solution, followed by stirring, filtering, and calcining at a high temperature to obtain a W@Gd2O3 powder with a core-shell structure; and adding the W@Gd2O3 powder to dimethylacetamide, then adding a certain amount of polyurethane resin adhesive, uniformly stirring same, and coating and drying the fabric. In the present invention, W@PDA is firstly prepared; since PDA has an extraordinary adhesion on the surfaces of different substances; after being coated with tungsten, the surface of PDA also contains a large number of polar groups, such as phenolic hydroxyl groups and amino groups, which provide abundant active sites for complexing Gd+, and results in a nitrogen-doped carbon layer by high-temperature calcination. Compared with the physical blending method with a single metal, the core-shell structure can have a synergistic protection in radiation protection, and effectively absorb secondary radiation generated by radiation while eliminating a weak protection zone. The PU resin coated fabric has relatively good wearability and mechanical properties, and the W@Gd2O3 powder has a good dispersibility in the PU resin, such that the final protective performance of the coated fabric is better.
Inventors:
YAO LIRONG (CN)
XIA YONG (CN)
YANG TAO (CN)
SUN TONG (CN)
PAN GANGWEI (CN)
XU SIJUN (CN)
JI TAO (CN)
GAO QIANG (CN)
XIA YONG (CN)
YANG TAO (CN)
SUN TONG (CN)
PAN GANGWEI (CN)
XU SIJUN (CN)
JI TAO (CN)
GAO QIANG (CN)
Application Number:
PCT/CN2021/114460
Publication Date:
August 11, 2022
Filing Date:
August 25, 2021
Export Citation:
Assignee:
UNIV NANTONG (CN)
International Classes:
D06N3/14; D06N3/00
Foreign References:
| CN112900110A | 2021-06-04 | |||
| CN111785967A | 2020-10-16 | |||
| CN108411618A | 2018-08-17 |
Other References:
TAO YANG, QIANG GAO, LIRONG YAO, DONG LIANG: "Preparation and Radiation Protection Property Study of Lead-free Protective Fabric", COTTON TEXTILE TECHNOLOGY, vol. 49, no. 7, 31 July 2021 (2021-07-31), pages 6 - 10, XP055956088, ISSN: 1000-7415
LEE HAESHIN, ET AL.: "Mussel-Inspired Surface Chemistry for Multifunctional Coatings", SCIENCE, AMERICAN ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE, US, vol. 318, 1 October 2007 (2007-10-01), US , pages 426 - 430, XP003031222, ISSN: 0036-8075, DOI: 10.1126/SCIENCE.1147241
LEE HAESHIN, ET AL.: "Mussel-Inspired Surface Chemistry for Multifunctional Coatings", SCIENCE, AMERICAN ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE, US, vol. 318, 1 October 2007 (2007-10-01), US , pages 426 - 430, XP003031222, ISSN: 0036-8075, DOI: 10.1126/SCIENCE.1147241
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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