用正电子湮没谱学技术表征一种有机-无机杂化膜

应用正电子湮没寿命谱(Positron annihilation lifetime spectroscopy,PALS)和正电子湮没符合多普勒展宽能谱(Coincidence Doppler broadening energy spectroscopy,CDBES)等正电子湮没谱学技术能从微观尺度上对聚合物-金属有机骨架材料杂化膜的微观结构进行表征。结果表明,随着金属有机骨架(Metal-Organic Frameworks,MOFs)添加量的增大,杂化膜中较小的和较大的自由体积的尺寸都减小了;杂化膜的正电子湮没符合多普勒展宽能谱显示,MIL-101(Material Institute La...

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Published in核技术 Vol. 38; no. 3; pp. 25 - 30
Main Author 王胜 杨静 田丽霞 于胜楠 曹兴忠 潘福生 姜忠义 于润升 王宝义 张鹏
Format Journal Article
LanguageChinese
Published 东华理工大学 南昌330013 2015
天津化学化工协同创新中心 天津300072
中国科学院高能物理研究所 北京100049%中国科学院高能物理研究所 北京100049%东华理工大学 南昌330013%天津大学化工学院绿色合成与转化教育部重点实验室 天津300072
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Summary:应用正电子湮没寿命谱(Positron annihilation lifetime spectroscopy,PALS)和正电子湮没符合多普勒展宽能谱(Coincidence Doppler broadening energy spectroscopy,CDBES)等正电子湮没谱学技术能从微观尺度上对聚合物-金属有机骨架材料杂化膜的微观结构进行表征。结果表明,随着金属有机骨架(Metal-Organic Frameworks,MOFs)添加量的增大,杂化膜中较小的和较大的自由体积的尺寸都减小了;杂化膜的正电子湮没符合多普勒展宽能谱显示,MIL-101(Material Institute Lavoisier-101)亚纳米粒子的加入使得正电子在聚二甲基硅氧烷(Poly(dimethyl siloxane),PDMS)氧原子上的偏向湮没效应减弱,部分正电子与来自MIL-101亚纳米粒子中金属原子的电子发生湮没,表明MOFs加入改变了聚合物基体自由体积周围的化学环境。
Bibliography:31-1342/TL
Positron annihilation, Free volume, Hybrid membrane, PDMS-MIL-IO1 (Poly (dimethyl siloxane)-Material Institute Lavoisier- 101)
WANG Sheng, YANG Jing, TIAN Lixia, YU Shengnan, CAO Xingzhong,PAN Fusheng, JIANG Zhongyi, YU Runsheng, WANG Baoyi, ZHANG Peng(1East China Institute of Technology, Nanchang 330013, China; 2Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; 3Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology Tianjin University, Tianjin 300072, China; 4Collaborative Innovation Center of Chemical Science and Engineering ( Tianjin ), Tianjin 300072, China)
Background: Due to the integration of the advantages of the inorganic filler phase and the polymer phase, the organic-inorganic hybrid membrane, which can overcome the trade-off effect between permeability and selectivity, is widely used in many areas. Purpose: The aim is to study the microstructure of the PDMS-MIL-101(Cr) (Poly (dimethyl siloxane
ISSN:0253-3219
DOI:10.11889/j.0253-3219.2015.hjs.38.030202