Thermoradiationally Modified Polytetrafluoroethylene as a Basis for Membrane Fabrication: Resistance to Hydrogen Penetration, the Effect of Ion Treatment on the Chemical Structure and Surface Morphology, Evaluation of the Track Radius

Lev Vladimirovich Moskvitin; Ol'ga Alekseevna Koshkina; Sergei Vital'evich Slesarenko; Mikhail Aleksandrovich Arsentyev; Leonid Izrailevich Trakhtenberg; Sergei Mikhailovich Ryndya; Eldar Parpachevich Magomedbekov; Alexander Sergeevich Smolyanskii

doi:10.3390/membranes13010101

Thermoradiationally Modified Polytetrafluoroethylene as a Basis for Membrane Fabrication: Resistance to Hydrogen Penetration, the Effect of Ion Treatment on the Chemical Structure and Surface Morphology, Evaluation of the Track Radius

Membranes (Basel). 2023 Jan 12;13(1):101. doi: 10.3390/membranes13010101.

Authors

Lev Vladimirovich Moskvitin^{1

2}, Ol'ga Alekseevna Koshkina³, Sergei Vital'evich Slesarenko², Mikhail Aleksandrovich Arsentyev², Leonid Izrailevich Trakhtenberg^{3

4

5}, Sergei Mikhailovich Ryndya⁶, Eldar Parpachevich Magomedbekov¹, Alexander Sergeevich Smolyanskii¹

Affiliations

¹ High Energy Chemistry and Radioecology Department, D. Mendeleev University of Chemical Technology of Russia, Moscow 125047, Russia.
² Technology Department, Quantum R LLC, Moscow 125319, Russia.
³ Laboratory of Functional Nanocomposites, N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Science, Moscow 119991, Russia.
⁴ Laboratory of Chemical Kinetics, Chemical Department, Lomonosov Moscow State University, Moscow 119991, Russia.
⁵ Department of Chemical Physics, Moscow Institute of Physics and Technology (State University), Dolgoprudny 141700, Russia.
⁶ Laboratory of Integrated Technology of Semiconductor Devices of the Center for Radio Photonics and Microwave Technologies of the Institute of Nanotechnologies in Electronics, Spintronics and Photonics of National Research Nuclear University MEPhI, Moscow 115409, Russia.

Abstract

A study of the properties of thermoradiationally modified polytetrafluoroethylene and its importance for use as the basis of polymer membranes is presented. The hydrogen permeability of a TRM-PTFE film was studied in comparison with an original PTFE film, and showed a three-fold decrease in hydrogen permeability. Further, TRM-PTFE films were irradiated with accelerated Xe ions with an energy of 1 MeV with fluences from 1 × 10⁸ to 1 × 10¹¹. The changes induced by ion treatment were analyzed by infrared spectroscopy of disturbed total internal reflection (IR-ATR) and by atomic force microscopy (ASM). IR-ATR indicated the absence of destruction in the fluence range from 1 × 10⁸ to 3 × 10¹⁰ cm^-2 (in the area of isolated tracks) and the beginning of overlap of latent tracks on fluences from 3 × 10¹⁰ to 1 × 10¹¹ cm^-2. Topographic images with AFM showed layered lamellar structures that collapsed at a fluence of 10⁸ cm^-2. The destruction was accompanied by a decrease in roughness about seven times the size of the track core observed by the ASM method, fully corresponding to the value obtained on the basis of calculations using modeling in an SRIM program.

Keywords: accelerated ions; cross-linking; fabrication of the pore structure; modelling; modification; polytetrafluoroethylene.

Grants and funding

This study was carried out with the support of the Ministry of Higher Education and Science of the Russian Federation within the framework of State Assignment No. FSSM-2020-0004.