Preparation and Shielding Performance of Gadolinium-Bismuth-Epoxy Composite Coatings

Yan-he Wu; Yu-shuai Cheng; Zheng-ke Wang

doi:10.11777/j.issn1000-3304.2025.25241

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Preparation and Shielding Performance of Gadolinium-Bismuth-Epoxy Composite Coatings

Research Article | 更新时间：2026-04-01

- Preparation and Shielding Performance of Gadolinium-Bismuth-Epoxy Composite Coatings
- Acta Polymerica Sinica Vol. 57, Issue 4, Pages: 927-938(2026)
- 作者机构：
  
  浙江大学高分子科学与工程学系杭州 310058
- 作者简介：
  
  Zheng-ke Wang, E-mail: wangzk@zju.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25241
  CLC：
- CSTR：32057.14.GFZXB.2025.7547
- Received：25 October 2025，
  
  Accepted：30 December 2025，
  
  Online First：11 February 2026，
  
  Published：20 April 2026
- 稿件说明：
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吴岩河, 程玉帅, 王征科. 钆-铋-环氧复合涂层制备及其射线屏蔽性能研究. 高分子学报, 2026, 57(4), 927-938.

Wu, Y. H.; Cheng, Y. S.; Wang, Z. K. Preparation and shielding performance of gadolinium-bismuth-epoxy composite coatings. Acta Polymerica Sinica (in Chinese), 2026, 57(4), 927-938.
吴岩河, 程玉帅, 王征科. 钆-铋-环氧复合涂层制备及其射线屏蔽性能研究. 高分子学报, 2026, 57(4), 927-938. DOI： 10.11777/j.issn1000-3304.2025.25241. CSTR： 32057.14.GFZXB.2025.7547.

Wu, Y. H.; Cheng, Y. S.; Wang, Z. K. Preparation and shielding performance of gadolinium-bismuth-epoxy composite coatings. Acta Polymerica Sinica (in Chinese), 2026, 57(4), 927-938. DOI： 10.11777/j.issn1000-3304.2025.25241. CSTR： 32057.14.GFZXB.2025.7547.

摘要

针对传统铅基屏蔽材料在40~88 keV能区屏蔽效率低、生物毒性强，及现有环氧基屏蔽材料因填料团聚致力学性能劣化等问题，本研究提出“核壳结构优化-表面化学键合”策略，制备了改性钆-铋-环氧复合屏蔽涂层. 首先以氧化钆、氧化铋为核，制备了Bi@Si/Gd@Si核壳结构纳米颗粒，再以KH550表面修饰，使纳米颗粒表面富含氨基，最后与环氧树脂复合，经超声分散及热固化处理，制得复合屏蔽涂层. 填料提高了复合涂层的热稳定性和力学性能，50%负载量的复合涂层粘接强度达25.80 MPa；对

129

I源的X射线屏蔽效率为93.8%，屏蔽

137

Cs源的

射线一半强度所需理论厚度为3.63 cm. 该涂层同时具备高黏合强度和优异的X/

射线屏蔽效率，可以通过喷涂等方式应用于金属设备表面，在核电站、太空防护等领域具有广阔的应用前景.

Abstract

To resolve the problems of traditional lead-based substrates

such as low shielding efficiency in the energy range of 40-88 keV

biological toxicity

and the deterioration of mechanical properties caused by filler agglomeration in epoxy matrix

we put forward a "core-shell structure optimization-surface chemical bonding" strategy to fabricate gadolinium-bismuth-epoxy composite shielding coatings. Using gadolinium oxide and bismuth oxide as the cores

Bi@Si/Gd@Si core-shell nanoparticles were synthesized. Subsequently

the amino groups were introduced onto the surface of the nano

particles through KH550 modification. Finally

these nanoparticles were compounded with epoxy resin. After ultrasonic dispersion and a heat curing process

the gadolinium-bismuth-epoxy composite shielding coatings were successfully fabricated. Both the thermal stability and mechanical properties of the composite coatings were enhanced by incorporation of fillers. The bonding strength of the composite coatings (with 50% filler loading) reached 25.80 MPa. The X-ray shielding efficiency of the coatings for

129

I source was 93.8%. The theoretical thickness required to half shielding of the intensity of

-rays from

137

Cs source was 3.63 cm. This coating combined high bonding strength and excellent shielding efficiency could be applied to the equipment

via

spraying or other techniques

thus presenting broad application prospects in fields such as nuclear power plants and space station protection.

关键词

Keywords

references

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