Modification of Properties of Natural Cellulose-Containing Composite Materials by Fluoroelastomers and Tetrafluoroethylene Telomers

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UDС

544.54:678.743

DOI:

10.17238/issn0536-1036.2018.2.122

Abstract

The paper presents the study of the surface modification process of cellulose-containing materials (wood veneer and paper) by fluorinated polymers. The solutions of a copolymer of hexafluoropropylene with vinylidene fluoride of grade F-26, and solutions of radiation-synthesized telomeres of tetrafluoroethylene of the Cherflon brand (TF-4) are used to modify the properties of materials. Changes in the physical and mechanical properties of treated and raw materials, as well as the protective effect of applied fluoropolymers on fire resistance and the ability of the studied objects to retain the internal chemical components of the composites during their model extraction by organic solvents (a mixture of methanol and chloroform) are studied. The tensile strength along the fibers treated with 5 % F-26 solution of pine, beech and birch samples is 136, 158 and 140 MPa, respectively, and those treated with TF-4 are 145, 162, 148 MPa against 103, 140 and 136 MPa for the original samples. Surface treatment of paper samples leads to their hardening by 20…45 %. A study of the extractability of protected materials by chromatography-mass spectrometry shows that applying a protective surface film of fluoropolymers reduces possible losses of substances to the extract by 10...150 %, and changes the chemical composition of the extractable composition, in which the compounds of natural fatty acids, carbonitriles, benzofurans, amides and quinones predominate. The test of direct flame effect on cellulose-containing materials confirms that the application of a fluorinated coating to 20...50 °С increases their fire resistance and allows varying decorative properties of materials.

Authors

A.N. Ivankin¹, Doctor of Chemical Sciences, Professor
V.G. Sanaev¹, Doctor of Engineering Sciences, Professor
G.A. Gorbacheva¹, Candidate of Engineering Sciences, Associate Professor
A.K. Ageev_¹, Student
D.P. Kiryukhin², Doctor of Chemical Sciences, Professor
G.A. Kichigina², Candidate of Chemical Sciences, Senior Research Officer
P.P. Kushch², Candidate of Chemical Sciences, Senior Research Officer

Affiliation

¹Bauman Moscow State Technical University, Pervaya Institutskaya ul., 1, Mytishchi, Moscow region, 141005, Russian Federation; e-mail: aivankin@inbox.ru, aivankin@mgul.ac.ru
²Institute of Problems of Chemical Physics of the Russian Academy of Sciences, pr. Akademika Semenova, 1, Chernogolovka,142432, Russian Federation

Keywords

wood veneer, paper, vinylidene fluoride-hexafluoropropylene copolymer, F-26, tetrafluoroethylene telomers, TF-4

For citation

Ivankin A.N., Sanaev V.G., Gorbacheva G.A., Ageev A.K., Kiryukhin D.P., Kichigina G.A., Kushch P.P. Modification of Properties of Natural Cellulose-Containing Composite Materials by Fluoroelastomers and Tetrafluoroethylene Telomers. Lesnoy zhurnal [Forestry journal], 2018, no. 2, pp. 122–132. DOI: 10.17238/issn0536-1036.2018.2.122

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Received on November 18, 2017