Study on surface adhesion of Plasma modified Polytetrafluoroethylene hollow fiber membrane

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Chen, Jiangrong^1 ; Zhang, Huifeng^1 ; Liu, Guochang^1 ; Guo, Chungang^1 ; Lv, Jinglie^1 ; Zhangb, Yushan^1

Institute of Seawater Desalination and Multipurpose Utilization, State Oceanic Administration, Tianjin

300192, China^1

关键词: Composition analysis;    Hollow fiber membrane modules;    Hollow fiber membranes;    Low surface energy;    Plasma treatment method;    Polytetrafluoroethylene (PTFE);    Pristine membranes;    Surface activities;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/2/022024/pdf
DOI  :  10.1088/1755-1315/108/2/022024

来源: IOP

【 摘 要 】

Polytetrafluoroethylene (PTFE) is popular membrane material because of its excellent thermal stability, chemical stability and mechanical stability. However, the low surface energy and non-sticky property of PTFE present challenges for modification. In the present study, plasma treatment was performed to improve the surface adhesion of PTFE hollow fiber membrane. The effect of discharge voltage, treatment time on the adhesion of PTFE hollow fiber membrane was symmetrically evaluated. Results showed that the plasma treatment method contributed to improve the surface activity and roughness of PTFE hollow fiber membrane, and the adhesion strength depend significantly on discharge voltage, which was beneficial to seepage pressure of PTFE hollow fiber membrane module. The adhesion strength of PTFE membrane by plasma treated at 220V for 3min reached as high as 86.2 N, far surpassing the adhesion strength 12.7 N of pristine membrane. Furthermore, improvement of content of free radical and composition analysis changes of the plasma modified PTFE membrane were investigated. The seepage pressure of PTFE membrane by plasma treated at 220V for 3min was 0.375 MPa, which means that the plasma treatment is an effective technique to improve the adhesion strength of membrane.