低场核磁共振技术在高分子材料中的应用  

Applications of Low-field Nuclear Magnetic Resonance Technology in Polymer Materials

作　　者：邬张玉 赵雪燕 雍怀松 何显儒[1] WU Zhangyu;ZHAO Xueyan;YONG Huaisong;HE Xianru(School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China;Institute of Chemical Materials,Chinese Academy of Engineering Physics,Mianyang 621900,China;Department of Molecules&Materials,University of Twente,Enschede 7500,Netherlands;Institute Theory of Polymers,Leibniz Institute of Polymer Research,Dresden 01069,Germany)

机构地区：[1]西南石油大学新能源与材料学院,四川成都610500 [2]中国工程物理研究院化工材料研究所,四川绵阳621900 [3]特文特大学分子材料系,荷兰恩斯赫德7500 [4]莱布尼茨聚合物研究所高分子物理研究部,德国德累斯顿01069

出　　处：《塑料工业》2025年第3期25-32,共8页China Plastics Industry

基　　金：国家自然科学基金项目(52073239)。

摘　　要：高分子材料由原子-链段-凝聚态多级结构组成,高分子链段的运动能力与凝聚态结构及宏观黏弹性都密切相关。低场核磁共振(LF-NMR)技术以氢质子为探针,能够原位、无损高效地表征含氢链段的运动特性。通过反演计算,可以进一步量化不同运动单元的占比及其弛豫时间。这项技术在高分子链段运动相关研究中展现了极大的应用潜力,包括相结构、组分比例、表界面相互作用力、交联网络及动力学演化等方面的研究。本文简述了低场核磁共振技术的测试原理,分类总结了低场核磁共振技术在高分子定性与定量分析中的应用,并探讨了其在应用中面临的问题与挑战。Polymers are long-chain molecules with multistage structures composed of atoms,chain segments and condensed states,the motility of polymer segments is tightly related to the condensed structure and viscoelasticity.Low-field nuclear magnetic resonance(LF-NMR)technology,which employs hydrogen protons as probes,enables in-situ,non-destructive,and efficient characterizations of the mobility of hydrogen-containing chain segments.Through inversion calculations,the proportions and relaxation times of different motional units could be quantified.This technology is a useful tool in the research fields related to polymer chain segment dynamics,including phase structures,composition ratios,interfacial interactions,crosslinking networks,dynamic evolutions and etc.This review provided a concise introduction to the fundamental principles of LF-NMR,summarized the LF-NMR applications in the qualitative and quantitative analysis of polymers,and discussed the problems and challenges in LF-NMR applications.

关 键 词：低场核磁共振 链段运动 弛豫时间 凝聚态结构 定性与定量分析 

分 类 号：TQ317.3[化学工程—高聚物工业]