摘要
为了不明显增加材料厚度的同时提升屏蔽性能,通过等体积浸渍法将钡(Ba^(2+))负载到天然皮革(NL)的多层级结构中得到钡/天然皮革(Ba/NL),并将分散有纳米氧化钆(Gd_(2)O_(3))的水性聚氨酯涂饰剂均匀涂覆于Ba/NL的粒面,得到钆-钡/天然皮革复合X射线屏蔽材料(Gd-Ba/NL)。X射线屏蔽性能研究表明,施加含钆涂层后,1.5 mm厚的Gd_(1.80)-Ba_(2.32)/NL具有与2.6 mm的Ba_(2.32)/NL相近的屏蔽效率;得益于Gd和Ba的协同作用,Gd_(1.80)-Ba_(2.32)/NL对能量为16~48 keV的X射线的屏蔽效率达到70%以上,对能量为65和83 keV的X射线的质量衰减系数与0.25 mm铅板的作用相当。此外,Gd_(1.80)-Ba_(2.32)/NL具有穿戴舒适度高、力学性能佳的优势,其密度仅为铅衣的1/3,透水汽性是铅衣的12倍,抗张强度和撕裂强度分别是国家标准要求的2倍和3倍,是一种可用于替代铅衣的有潜力的可穿戴X射线屏蔽材料。
To enhance the shielding performance of materials without significantly increasing the thickness,barium(Ba)was initially incorporated into the hierarchical structure of natural leather(NL)through the equal volume impregnation strategy(Ba/NL),and the waterborne polyurethane finishing agent with well-dispersed nano-gadolinium-oxide(Gd_(2)O_(3))was uniformly coated on the grain surface of Ba/NL to fabricate X-ray shielding material(Gd-Ba/NL).X-ray shielding performance results showed that the 1.5-mm-thick Gd1.80-Ba2.32/NL could provide an equivalent level of shielding efficiency to 2.6-mm-thick Ba_(2.32)/NL.The synergistic effect of Gd and Ba contributed to a shielding efficiency exceeding 70%for the X-rays in the energy range of 16-48 keV,and provided a comparable mass attenuation coefficient for the X-rays in the energy of 65 and 83 keV to that of 0.25 mm lead plate.Furthermore,Gd_(1.80)-Ba_(2.32)/NL exhibited several advantages,including superior wearable comfortableness and excellent mechanical strength.Notably,it possessed a density that is only 1/3 of lead apron,while offering a water vapor permeability 12 times higher than that of lead apron.Its tensile strength and tearing strength surpassed national standards by 2 and 3 folds,respectively.Consequently,Gd1.80-Ba2.32/NL holds great potential as a wearable X-ray shielding material capable of replacing traditional lead apron.
作者
李昊
吴承承
王志新
王亚平
廖学品
石碧
LI Hao;WU Chengcheng;WANG Zhixin;WANG Yaping;LIAO Xuepin;SHI Bi(National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University,Chengdu 610065,China;Key Laboratory of Leather Chemistry and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China;Zhongjin Irradiation Chengdu Co.,Ltd.,Chengdu 611930,China.)
出处
《皮革科学与工程》
CAS
北大核心
2024年第3期9-16,共8页
Leather Science and Engineering
基金
国家自然科学基金(22278279)
中国博士后科学基金(2023M742493)。
关键词
天然皮革
钡
钆
可穿戴
X射线屏蔽材料
natural leather
barium
gadolinium
wearable
X-ray shielding material
