超细纤维-稀土元素复合X射线防护材料的制备及性能  

Preparation and properties of microfiber-rare earth elements composites as X-ray protective materials

作　　者：闫林萍 沈悦[1] 李昊 庄君新 钟睿[4] 廖学品[1,2] 石碧[1,2] YAN Linping;SHEN Yue;LI Hao;ZHUANG Junxin;ZHONG Rui;LIAO Xuepin;SHI Bi(College of Biomass Science and Engineering,Sichuan University,Chengdu 610065,China;National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University,Chengdu 610065,China;Mingxin Menoroka(Jiangsu)New Material Co.,Ltd.,Xuzhou 221000,Jiangsu,China;Institute of Atomic Energy Science,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学轻工科学与工程学院,成都610065 [2]四川大学制革清洁技术国家工程实验室,成都610065 [3]明新孟诺卡(江苏)新材料有限公司,江苏徐州221000 [4]四川大学原子能科学研究所,成都610065

出　　处：《材料工程》2023年第4期167-176,共10页Journal of Materials Engineering

摘　　要：超细纤维(MF)与天然皮革具有相似的结构。将La,Ce,Gd,Er四种稀土元素,通过植物单宁负载到超细纤维表面,制备了可穿戴超细纤维基X射线防护材料(RE-MF),并对其进行了X射线屏蔽性能测试。紫外吸收光谱(UV-Vis)、傅里叶红外光谱(FT-IR)、光电子能谱(XPS)、扫描电子显微镜(SEM)等分析结果表明,通过植物单宁不仅能够成功地将稀土元素负载到超细纤维表面,而且能够实现稀土元素在纤维表面的均匀分布。X射线屏蔽性能测试结果表明,在光子能量100 keV以内,负载四种稀土元素的超细纤维材料都具有良好的X射线屏蔽性能,且屏蔽效率随着负载量和厚度的增加而增大,在20~80 keV能量段,2.6 mm Gd_(4)-MF对X射线的屏蔽效率可达60%,接近0.25 mm厚度的铅板,可代替铅板成为无毒、柔软的可穿戴X射线防护材料。力学性能测试结果表明,超细纤维基X射线防护材料保持了超细纤维原有的良好力学性能,有望在X射线防护领域得到广泛应用。Microfiber(MF)has a similar structure to natural leather.Four rare earth(RE)elements,La,Ce,Gd,and Er,were loaded onto the surface of microfibers through plant tannins to prepare a wearable microfiber-based X-ray shielding material(RE-MF),and the X-ray shielding performance was tested.The analysis results of ultraviolet absorption spectroscopy(UV-Vis),Fourier transform infrared spectroscopy(FT-IR),photoelectron spectroscopy(XPS),and scanning electron microscopy(SEM)indicate that the rare earth elements can be uniformly loaded onto the surface of ultrafine fibers using plant tannins.The test results of X-ray shielding performance show that within the photon energy of 100 keV,the microfiber materials loaded with four rare earth elements have good X-ray shielding performance,and the shielding efficiency is increased with the increase of the loading amount of rare earth element and the thickness of microfiber.In the 20-80 keV energy range,the shielding efficiency of 2.6 mm Gd_(4)-MF is up to 60%against X-rays,nearly equal to that of 0.25 mm lead plate but with non-toxicity,softness and wearability features.The test results of mechanical properties show that the microfiber-based X-ray protective material maintains the original good mechanical properties of microfibers,and is expected to be widely used in the field of X-ray protection.

关 键 词：超细纤维(MF) X射线 稀土元素 防护材料 屏蔽效率 

分 类 号：O644[理学—物理化学]