Tetrafluoroethylene Telomeres Used to Prepare Fluorine-Containing Hydrophobic Silica Fabric

• Published in: Inorganic materials : applied research 2018, Vol.9 (5), p.861-867
• Main Authors: Kichigina, G. A., Kushch, P. P., Krivonogova, E. A., Kiryukhin, D. P., Dorohov, V. G., Barelko, V. V.
• Format: Article
• Language: English
• Subjects: Absorption spectra; Acetone; Chemistry; Chemistry and Materials Science; Cloth; Feasibility studies; Fiberglass; Fluorine; Fluoropolymers; Hydrophobicity; Impregnation; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Lubricants; Materials for Ensuring Human Vital Activity and Environmental Protection; Materials Science; Pretreatment; Silicon dioxide; Telomerase
• ISSN: 2075-1133; 2075-115X
• DOI: 10.1134/S2075113318050155

Fluoroplastic varnished cloth is a fiberglass fabric that has been repeatedly impregnated with fluoroplastic suspension (F-4D) and treated thermally; it contains ~60–80% of fluoroplastic. In this work, silica fabric KT-11-13 has been used as the base for the production of varnished cloths with a low content of fluoropolymer, whereas solutions of tetrafluoroethylene telomeres with the general formula A–(CF 2 –CF 2 ) n –B synthesized by radiation in acetone ( n ~ 15, A, B being CH 3 COCH 2 , H, CH 3 ) and pentafluorochlorobenzene ( n ~ 70, A, B being C 6 F 5 , Cl) have been used as an impregnating medium. A hydrophobic material containing 5–10% of fluoropolymer has been obtained; the technique of pretreatment of industrial fabric from technical lubricant has been worked out; several methods for its removal have been suggested. Silica and aluminoborosilicate fabrics used as bases have been compared; the feasibility of using tetrafluoroethylene telomeres in аcetone and pentafluorochlorobenzene has been evaluated. The presence of a fluoropolymer coating providing hydrophobicity of silica fabric is indicated by IR absorption spectra.