Influence of activation modes on the specific surface and development of a microporous structure of viscose-based carbon fibers
https://doi.org/10.17073/1997-308X-2015-4-34-39
Abstract
Specific surface and porous structure of carbon fibers based on viscose produced by the Krasnoyarsk Plant of Chemical Fibers are investigated by low-temperature nitrogen absorption using an ASAP 2020 device. The dependence of their specific surface and character of the pore-size distribution on the modes of gas-phase activation in the carbon dioxide stream at 900°C is shown. It is established that the adsorption surface of carbon fibers can grow from 0,3 to 1900 m2/g in the course of activation. It is revealed that an increase in the activation time leads to an increase in the specific surface of fibers due to the appearance of numerous new micropores and development of the microporous structure.
About the Authors
V. A. Gorina
АО «Научно-исследовательский институт конструкционных материалов на основе графита «НИИграфит», г. Москва
Russian Federation
Russian Federation
researcher of Testing Centre of SC «Research Institute of Graphite-Based structural Materials “NIIgraphit”» (111524, Russia, Moscow, Elektrodnaya str., 2)
E. G. Cheblakova
АО «Научно-исследовательский институт конструкционных материалов на основе графита «НИИграфит», г. Москва
Russian Federation
Cand. Sci. (Tech.), superior of Testing Centre SC “NIIgraphit”.
Russian Federation
Cand. Sci. (Tech.), superior of Testing Centre SC “NIIgraphit”.
References
1. Kostikov V.I. Uglerod-uglerodnye kompozitsionnye materialy [The carbon-carbon composites]. Zhurnal Vsesoyuznogo khimicheskogo obshchestva im. D.I. Mendeleeva. 1989. Vol. 34. No. 5. P. 492—499.
2. Uglerodnye volokna i uglekompozity [Carbon fiber and uglekompozity]. Ed. E.Fittser. Moscow: Mir, 1988.
3. Zolkin P.I., Ostrovskiy V.S. Uglerodnye materialy v meditsine [Carbon materials in medicine]. Moscow: Metallurgizdat, 2014.
4. Fenelonov V.B. Poristyi uglerod [The porous carbon]. Novosibirsk: IK SO RAN, 1995.
5. Kuznetsov B.H. Sintez i primenenie uglerodnyh sorbentov [Synthesis and use of carbon adsorbents]. Moscow: Himiya, 1999.
6. Lyashenko S.E., Soboleva I.V., Drobyshev V.M. Issledovanie svoistv sinteziruemyh uglevoloknistyh adsorbentov na osnove gidrattsellyuloznogo volokna s tsel’yu upravleniya protsessom aktivatsii [Studying the properties of carbon fiber synthesized adsorbents based on rayon to manage the activation process]. Uspehi sovremennogo estestvoznaniya. 2014. No.1. P. 70—73.
7. Gorina V.A., Cheblakova E.G., Zolkin P.I. Vliyanie rezhimov termicheskoy obrabotki na udel’nuyu poverhnost’ i poristuyu strukturu uglerodnyh volokon na osnove viskozy [Effect of heat treatment on the specific surface area and pore structure of the carbon fibers based on viscose]. Poroshkovaya metallurgiya. 2012. No. 4. P.62—65.
8. Fridman L.I. Uglevoloknistye adsorbenty, teoreticheskie osnovy polucheniya [Carbon fiber adsorbents, theoretical bases of reception]. Khimicheskie volokna. 2010. No. 5. P. 30—32.
9. Shibagaki K., Motojima S., Umemoto Y., Nishitanib Y. Outermost surface microstructure of as-grown, heat-treated and partially oxidized carbon microcoils. Carbon. 2001. Vol. 39. P. 1337—1342.
10. Beck N.V., Meech S.E., Norman P.R., Pears L.A. Characterisation of surface oxides on carbon and their influence on dynamic adsorbtion. Carbon. 2002. Vol. 40. P. 531—540.
11. Shibagaki K., Motojima S. Surface properties of carbon micro-coils oxidized by a low concentration of oxygen gas. Carbon. 2000. Vol. 38. P. 2087—2093.
12. Horvath G., Kawazoe K. Characterization of powder surfaces. J. Chem. Eng. Jap. 1983. Vol. 16. No. 6. P. 470—474.
13. Zielke U., Huttinger K.J., Hoffman W.P. Surface-oxidized carbon fibers. Surface structure and chemistry. Carbon. 1996. Vol. 34. P. 983—998.
14. Greg S., Sing K. Adsorbtsiya, udel’naya poverhnost’, poristost’ [Adsorption, surface area and porosity]. Moscow: Mir, 1984.
15. Dubinin M.M. Adsorbtsiya i poristost’. In: Sovremennye problemy teorii adsorbtsii [Adsorption and porosity. In: Modern problems of the theory of adsorption]. Moscow: Nauka, 1995. P. 34—42.
Review
For citations:
Gorina V.A., Cheblakova E.G. Influence of activation modes on the specific surface and development of a microporous structure of viscose-based carbon fibers. Powder Metallurgy аnd Functional Coatings (Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional'nye Pokrytiya). 2015;(4):34-39. (In Russ.) https://doi.org/10.17073/1997-308X-2015-4-34-39
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