摘要
高分子膜可用于水处理分离、气体分离、光电膜和医用膜等多个领域,具有重要的研究意义。扫描电镜是表征膜结构和形貌的重要技术手段,实验中发现基膜使用高分子纤维层层压制的膜样品在液氮中韧性强无法脆断,膜截面扫描电镜测试结果不理想。针对这一类膜截面制样难成功率低的问题,根据冷冻切片机的原理,本文提出四种简单易操作的膜截面样品制样技巧,利用剪刀、手术刀等小工具在液氮中将膜断开,或将膜在液氮中撕开、弯折。通过三种不同结构的膜验证制样技巧的适用性,扫描电镜测试的膜截面结构和形貌均比较理想。该方法有效地提高膜截面样品的制样成功率,对研究者制备基于扫描电镜表征的理想膜截面样品有一定的借鉴性。
Polymeric membrane can be used in water treatment separation,gas separation,photoelectric membrane,medical membrane and other fields,which is of an great research significance.Scanning electron microscopy(SEM) is an important technology to characterize the membranes’ structure and morphology.In the experiment,it was found that the substrate film pressed layer by layer with polymer fiber had strong toughness and could not be brittle broken in liquid nitrogen.The SEM results could not be used for further study.According to the principle of freezing microtome,four kinds of sample preparation techniques used for membranes’ section have been realized.The membranes were disconnected in liquid nitrogen by scissors,scalpel and other small tools.It also can be teared or bend in liquid nitrogen.The applicability of sample preparation methods has been verified by three membranes with different structures and the SEM results are of satisfactory.These methods can effectively improve the success rate of membranes’ section samples,and can be helpful for researchers to obtain ideal membranes’ section samples characterized by SEM.
作者
陈茜
李少杰
丛铁
魏丽娟
CHEN Xi;LI Shao-jie;CONG Tie;WEI Li-juan(Instrumental Analysis&Research Center,Dalian University of Technology,Panjin Liaoning 124221;School of Chemical Engineering,Dalian University of Technology,Panjin Liaoning 124221,China)
出处
《电子显微学报》
CAS
CSCD
北大核心
2022年第2期194-198,共5页
Journal of Chinese Electron Microscopy Society
基金
大连理工大学基本科研业务费(No.DUT19JC54)。
关键词
高分子膜
膜截面
扫描电镜
polymeric membrane
the membranes’section
scanning electron microscope
