The main methods for producing a polyacrylonitrile precursor, methods for producing carbon fiber, its properties, and applications are presented. Patent research in the field of polyacrylonitrile precursor and carbon fiber. Technological problems in the subject area are identified, namely the development of technologies and equipment for producing high-strength carbon fiber, the development of technologies and equipment to reduce the cost of carbon fiber production, the development of technologies for improving the quality of carbon fiber-based composites, and the main ways to solve them are given. Ways to solve them are developing a technology for producing a polyacrylonitrile precursor for producing high-strength carbon fibers by the wet spinning method, developing a “dry-wet” method for producing polyacrylonitrile, developing high-performance equipment for producing technical polyacrylonitrile precursor in the form of bundles, developing technologies and equipment for efficient regeneration and utilization waste, heat and emissions from the production of carbon fibers, the development of new compositions of precursors and the transition to materials with a higher linear density, optimization of the structure of carbon fiber reinforced plastic to increase strength, the development of technologies and the creation of production of modern types of binders, including the addition of nanoparticles. The main methods for modifying the surface of a carbon fiber that are currently existing are considered., {"references": ["1.\tMachalaba N.N., Genis A.V. State and prospects of research and production activities of FGUP (Federal State Unitary Enterprise \"VNIISV\" (SCIENTIFIC RESEARCH INSTITUTE OF SYNTHETIC FIBER). Chemical fibers. 2011. No.1. P.3-10.", "2.\tSviridov A.A., Varshavsky V.Y., Seleznev A.N. and etc. Structural and thermal characteristics of polyacrylonitrile fibres as raw material for production of carbon fibres. Chemical fibers. 2009. No.4. P.14-16.", "3.\tP. Morgan. Carbon fibers and their composites. Boca Ration: Taylor&Francis. 2005. 1153p", "4.\tPerepelkin K.E. Carbon fibres with specific physical and physicochemical properties based on hydrated cellulose and polyacrylonitrile precursors. Chemical fibers. 2002. No.4. P.32-40.", "5.\tKomarova T.V. Carbon fiber: text of lectures. \u041c.: D.I. Mendeleev University of Chemical Technology of Russia 1994. 52p", "6.\tHolding company \"Composite\" [Electronic resource]. Access mode: http://compozit.su (accessed date: 15.01.2020).", "7.\tAizenstein E.M. The synthetic fibers and threads market in the second half of 2007. Chemical fibers. 2008. No.2. P.3-10.", "8.\tAizenstein E.M. The world and Russian markets for chemical fibres and thread in 2007. Chemical fibers. 2008. No.6. P.49-59.", "9.\tAizenstein E.M. Polyester fibers continue to have a strong lead in the global balance of textile raw materials. Chemical fibers. 2009. No.1. P.5-10.", "10.\tAizenstein E.M. The world and domestic chemical fiber industry in 2013. Chemical fibers. 2014. No.5. P.3-7.", "11.\tAizenstein E.M. Polyester fibers in 2012. Chemical fibers. 2014. No.1. P.3-6.", "12.\tAizenstein E.M. Chemical fibers in 2012 in the world and Russian markets. Chemical fibers. 2013. No.6. P.3-8.", "13.\tAizenstein E.M. The world production of chemical fibers in 2011. Chemical fibers. 2012. No.3. P.3-7.", "14.\tSidorenko Y.N. Structural and functional fiber composite materials: tutorial. Tomsk: TSU Publishing House. 2006. 107p.", "15.\tR. Eslani Farsani, A. Shokuhfar, A. Sedghi. Carbon fiber fabricating process based on commercial wet-spun polyacrylonitrile fibers. Chemical fibers. 2006. No.5. P.32-33.", "16.\tN. Yusof, A.F. Ismail. Preparation and characterization of polyacrylonitrile / acrylamide-based activated carbon fibers developed using a solvent-free coagulation process. International Journal of Chemical and Environmental Engineering. 2010. No.1 \u0420.79-84.", "17.\tRogovin Z.A. Fundamentals of chemical fiber chemistry and technology. \u041c.: Chemistry. 1974. Vol.2. 344p", "18.\tUstinova T.P., Zaitseva N.L. Polyacrylonitrile (PAN) fibers: technology, properties, application fit: course of lectures. Saratov: Saratov State Technical University. 2002. 40p", "19.\tPerepelkin K.E. Carbon-chain synthetic fibers. \u041c.: Chemistry. 1973. 589p", "20.\tVarshavsky V.Y. Carbon fibers. \u041c.: Federal State Unitary Enterprise \"PIK VINITI\". 2007. Edition 2. 500p.", "21.\tKaverov A.T., Selivanova L.F. and etc. Changes in the structure and physical and mechanical properties of polyacrylonitrile fiber during heat treatment. Moscow International Composites Conference: abstracts. M. 1990. P.9.", "22.\tKaverov A.T. Relation between structure and properties of polyacrylonitrile and carbon fibers. Scientific and technical collected book of M.V. Keldysh.NIITP (Scientific Research Institute of Precision Instruments). 1987. P.62-72.", "23.\tSerkov A.T., Budnitsky G.A., Radishevsky M.B. and etc. Ways for improving the technology of carbon fiber producing. Chemical fibers. 2003. No.2. P.26-30.", "24.\tRadishevsky M.B., Serkov A.T., Budnitsky G.A. and etc. Improvement of the production technology.for high-strength and high-modulus carbon fibers. Chemical fibers. 2005. No.5. P.11-15.", "25.\tZlatoustova L.A. Obtaining of polyacrylonitrile tows for carbon fibers: Dissertation \u2026 \u0441andidate of chemical sciences: 05.17.06. M. 2006. 271p", "26.\tBaurova N.I., Zorin V.A., Prikhodko V.M. Evaluation of the influence of carbon fiber structural defects on their sensory properties by electron microscopy scanning methods. Chemical fibers. 2014. No.5. P.13-17.", "27.\tPatent 2549075 Russian Federation, International Patent Classification7 D01D 5/00, D01F 6/18, B01D 43/00. Method of polymer isolation from solution while forming a pan-precursor to obtain carbon fibers. Kulichikhin Valery Grigorievich, Semakov Alexander Vasilievich, Malkin Alexander Yakovlevich, Skvortsov Ivan Yurievich; patent applicant and patent holder Federal State Budgetary Institution of Science A.V. Topchiev Institute of Petrochemical Synthesis of the Order of the Red Banner of Labor of the Russian Academy of Sciences. No. 2013137256/12; pending 09.08.2013; published 20.04.2015; Bulletin No.11. 10p.", "28.\tPatent 2541473 Russian Federation, International Patent Classification7 D01D 1/02, D01F 6/18. Method for obtaining of a copolymer solution based on acrylonitrile in n-methylmorpholine-n-oxide. Makarov Igor Sergeevich, Golova Lyudmila Konstantinovna, Kuznetsova Lyudmila Kuzminichna, Shlyakhtin Andrey Vladimirovich, Nifantyev Ilya Eduardovich, Kulichikhin Valery Grigorievich; patent applicant and patent holder Federal State Budgetary Institution of Science A.V. Topchiev Institute of Petrochemical Synthesis of the Order of the Red Banner of Labor of the Russian Academy of Sciences. No. 2013126904/04; pending 13.06.2013; published 20.02.2015; Bulletin No.5. 8p.", "29.\tPatent 2702642 Russian Federation, International Patent Classification7 D01F 6/18. Non-woven heat-insulating fire-resistant arc-resistant material. Makhov Sergey Alexandrovich, Mezentseva Elena Viktorovna, Gontar Viktor Anatolyevich, Nazartsev Andrey Andreevich, Ivanov Vladislav Viktorovich; patent applicant and patent holder Limited Liability Company \"Termopol\". No. 2019110895; pending 11.04.2019; published 09.10.2019; Bulletin No.28. 12p.", "30.\tPatent 2497587 Russian Federation, International Patent Classification7 B01J 21/18, B01J 23/40, B01D 71/00, B82B 3/00, C07B 35/04. Method of making membrane catalyst and method of hydrocarbon dehydration using obtained catalyst. Ermilova Margarita Meerovna, Efimov Mikhail Nikolaevich, Zemtsov Lev Mikhailovich, Karpacheva Galina Petrovna, Orekhova Natalya Vsevolodovna, Tereshchenko Gennady Fedorovich; patent applicant and patent holder Federal State Budgetary Institution of Science A.V. Topchiev Institute of Petrochemical Synthesis of the Order of the Red Banner of Labor of the Russian Academy of Sciences. No.2011145690/05; pending 11.11.2011; published 10.11.2013; Bulletin No.31. 17p", "31.\tPatent 2647861 Russian Federation, International Patent Classification7 C08F 2/06, C08F 2/38, C08F 220/44, C08F 6/00, D01D 5/06, D01F 9/22. Polyacrylonitrile (PAN) polymers with a low polydispersity index (IPD) and carbon fibers made therefrom. Tan Lungui, Thomas Alan D., Harmon Billy D; patent applicant and patent holder SITEK INDUSTRIES INC. No.2016129965; pending 21.11.2014; published 21.03.2018; Bulletin No.9. 25p.", "32.\tPatent 206457564 China, International Patent Classification7 D01D13/02; D01D5/06. PAN precursor coagulating bath corridor degree of depth gradual change formula adjusting device. Liu Hui; Lian Xinshu, Kong Lingqiang, Leng Xiaogui; patent applicant and patent holder PETROCHINA CO LTD. \u2116201621313428; \u043e\u043f\u0443\u0431\u043b. 01.09.2017.", "33.\tPatent 106480515 China, International Patent Classification7 D01D1/10, D01F9/12. Filtering device for PAN-based carbon fiber precursor spinning. Meng Fanjun, Meng Zishun; patent applicant and patent holder HARBIN TIANSHUN CHEMICAL TECH DEV CO LTD. \u2116 201610926380; published 08.03.2017.", "34.\tPatent 104231158 China, International Patent Classification7 C08F218/08, C08F220/06, C08F220/44, C08F222/02, C08F4/40, C08F6/06, D01D10/02, D01D5/06, D01F6/40, D01F9/22. Preparation method of PAN precursor for carbon fiber. Ouyang Qin, Chen Yousi; patent applicant and patent holder NINGBO INST MATERIALS TECHNOLOGY & ENG CAS. No.201310232529; published 24.12.2014.", "35.\tPatent 101161094 Korea, International Patent Classification7 C08F20/44, D01D1/02, D01F6/18, D01F9/22. The method for preparing the dope of pan precursor for carbon fiber. Choi Sheong Hyun, Bang Yun Hyuk, Wang Young Soo; patent applicant and patent holder HYOSUNG CORP. No. 20100138321; published 29.06.2012.", "36.\tVarshavsky V.Y., Mayanov E.P., Gaberling A.V. Polyacrylonitrile fibers and carbon fibers based thereon as nanostructured materials. Composites and nanostructures. 2009. No.4. P.19-27.", "37.\tRibeiro, Luiz Claudio Pardini, Nilton Pereira Alves, Carlos Alberto Rios Brito J\u00fanior. Pol\u00edmeros Tan, Lianjiang Investigating the Spinnability in the Dry-Jet Wet Spinning of PAN Precursor Fiber. Lianjiang Tan, Huifang Chen, Ding Pan, Ning Pan. Journal of Applied Polymer Science. 2008. Vol.110 P.1997-2000.", "38.\tRibeiro, R. F., Pardini, L. C., Alves, N. P., & Brito J\u00fanior, C. A. R. (). Thermal Stabilization study of polyacrylonitrile fiber obtained by extrusion. Pol\u00edmeros. 2015. 25(6). P.523-530. doi:10.1590/0104-1428.1938", "39.\tGenis A.V., Kuznetsov A.V. The relationship between the filler activity and the polymer matrix structure with the properties of the fibrous composite material. Plastics. 2016. No.11-12. P.27-32.", "40.\tNebratenko M.Y., Naumova Y.A., Filatov Y.N. Organic solvents and spinning solution properties. Bulletin \"Fine Chemical Technologies\" 2008. Vol.3. No.3. P.32-39.", "41.\tRyauzov A.N., Gruzdev V.A., Baksheev I.P. Chemical fiber production technology. \u041c.: Chemistry. 1980. 448p", "42.\tFilatov Y.N. Electrospinning of fibrous materials (EPI-process). \u041c.: Oil and Gas. 1997. 297p", "43.\tM.S.A. Rahaman, A.F. Ismail, A. Mustafa. A review of heat treatment on polyacrylonitrile fiber. Polymer Degradation and Stability. 2007. Vol.92 P.1421-1432.", "44.\tKorchina L.V., Zubova N.G., Ustinova T.P. Investigation of the influence of pan-tow modification parameters with sizing compounds on its properties. Bulletin of Saratov State Technical University. 2014. No.2. P.83-86.", "45.\tAthirah Eleyas, Sharifah Shahnaz Syed Bakar, Norzilah Binti Abdul Halif, Shuhaida Binti Yahud. \u0422he effect of flow rate, concentration, and voltage on diameter of pan precursor fiber by electrospinning technique. Journal of Built Environment, Technology and Engineering. 2017. Vol.2 P.71-78.", "46.\tYang Sha, Wei Liu, Yue Li1, Weiyu Cao. Formation Mechanism of Skin-Core Chemical Structure within Stabilized Polyacrylonitrile Monofilaments. Nanoscale Research Letters. 2019. P.1-7.", "47.\tYu Wang, Yuanjian Tong, Bowen Zhang, Hua Su, Lianghua Xu. Formation of Surface Morphology in Polyacrylonitrile (PAN) Fibers during Wet-Spinning. Journal of Engineered Fibers and Fabrics. 2018. Vol.2 P.52-57.", "48.\tSimamura S. Carbon fibers. \u041c.: Mir. 1987. 304p.", "49.\tZazulina Z.A., Druzhkina T.V. Fundamentals of chemical fiber technology. \u041c.: Chemistry. 1985. 303p.", "50.\tFitzer E. Carbon fibers and carbon composites. \u041c.: Mir. 1988. 336p.", "51.\tBerkovich A.K., Sergeev V.G., Medvedev V.A., Malakho A.P. Synthesis of acrylonitrile-based polymers. PAN and carbon fiber production technology. Tutorial of the Moscow State University. M. 2010. 63p.", "52.\tAnanin S.V., Ananyeva E.S., Markin V.B. Composite materials. Tutorial Altai State Technical University. Barnaul. 2007. 94p.", "53.\tMatrenin S.V., Ovechkin B.B. Composite materials and polymer-based coatings. Tutorial, Tomsk. 2008. 197p.", "54.\tUse of composite materials in engineering, ed. B. Naughton. Composite materials. \u041c.: Mechanical engineering. 1978. Vol.3. 511p.", "55.\tSato K., Tanaka E. Carbon-based composite materials reinforced with carbon fiber. Jidosha gijutsu. 1988. Vol.42. No.6. P.673-678.", "56.\tKudryavtsev G.I. Reinforcing chemical fibers for composite materials. \u041c.: Chemistry. 1992. 328p.", "57.\tKadantseva A.I., Tverskoy V.A. Carbon fibers. Tutorial of the Moscow Lomonosov Institut of Fine Chemical Technologies. 2008. 55p", "58.\tDestruction and fatigue. Ed. L. Brautman. Composite materials. \u041c.: Mechanical engineering. 1978. Vol.5. 294p.", "59.\tMechanics of composite materials. Ed. J. Sendetski. Composite materials. \u041c.: Mir. 1978. Vol.2. 132p", "60.\tComposite materials with a metal matrix. Ed. K. Kreider. Composite materials. \u041c.: Mechanical engineering. 1978. Vol.4. 503p.", "61.\tInterfaces in metal matrix composites. Ed. Metcalfe. Composite materials. \u041c.: Mir. 1978. Vol.1. 438p.", "62.\tVasiliev V.V., Protasov V.D., Bolotin V.V. Composite materials. Hand book. \u041c.: Mechanical engineering. 1990. 512p.", "63.\tInterfaces in polymer matrix composites. Ed. E. Plueddemann Composite materials. \u041c.: Mir. 1978. Vol.6. 275p.", "64.\tJ.B. Donnet, T.K. Wang, S. Rebouillat, J.C.M. Peng. Carbon fibers, 3rd ed. New York: Marcel Dekker. 1998. P.161-229.", "65.\tBushuev Y.G. Carbon-carbon composite materials. \u041c.: Mir. 1994. 128p.", "66.\tM.R. Alexander, F.R. Jones. Electrochemical modification of surface properties of carbon fibers. Carbon. 1994. Vol.32 P.785", "67.\tKimura S., Yasuda E. Composite materials of the carbon-carbon system. Netsu seri. 1986. Vol.26. No.4. P.284-288.", "68.\tM.R. Alexander, F.R. Jones. ToF SIMS and XPS studies of carbon fiber surface during electrolytic oxidation in 17O/18O enriched aqueous electrolytes. Carbon. 1996. Vol.34 P.1093", "69.\tPatent 4637925, USA Ultra high strength carbon fiber. H. Toh\u0433u, M. Yohji, H. Tomitake. Toray Ind., Inc.. No.854979. pending 23.04.86, published 21.01.87.", "70.\tKikuchi S. Modern developments in the field of carbon-carbon composite materials. Nippon fukugo zaire gakkai shi. 1985. Vol.2. No.2. P.56-64.", "71.\tE. Theodoridou, A. D. Jannakoudakis. Carbon fibre-supported noble metal catalysts: optimization of fibre pretreatment. Phys. Chem. N.F. 1982. Vol.132 P.175", "72.\tPatent 5589055 USA Method for preparing carbon fibers. M. Kobayashi, M. Itoh, Y. Matsuhisa, K. Shimizu. International Patent Classification 6 C 25 F 1/00. Toray Ind., Inc.. No.460917; pending 5.6.95; published 31.12.96.", "73.\tM. Blazewicz, S. Blazewicz, C. Wajler. Chemically and physically functionalized carbon composites \u2013 a prospective material for tissue treatment. Ceram. Int. 1994. Vol.20 P.99-103.", "74.\tKomarova T.V. Carbon fibers. Text of lectures. D.I. Mendeleev University of Chemical Technology of Russia 1994. 52p.", "75.\tC.U. Jr. Pittman, G.-R. He, B.Wu, S.D. Gardner. Chemical modification of carbon fiber surfaces by nitric acid oxidation followed by reaction with tetra ethylenepentamine. Carbon. 1997. Vol.35 P.317-331.", "76.\tW. Zhihong, U. Charles, Jr. Pittman. Reactions of defined oxidized carbon fiber surfaces with model compounds and polyurethane elastomers. Carbon. 1995. Vol.33 P.597-605.", "77.\tS.K. Eung, H.L. Tae, J.K. Eun, Y. Jin-San. Surface Modification of Carbon Fiber and the Mechanical Properties of the Silicone Rubber. Carbon Fiber Composites. Journal of Applied Polymer Science. 2012. Vol.126 P.410-418.", "78.\tTikhomirov A.S., Sorokina N.E., Avdeev V.V. Modification of the carbon fiber surface with nitric acid solutions. Inorganic materials 2011. No.6. P.684-688.", "79.\tF. Severinia, L. Formarob, M. Pegoraroa. Chemical modification of carbon fiber surfaces. Carbon. 2002. No.40 P.735-741.", "80.\tRashkovan I.A. The effect of surface modification on carbon fibers properties and the realization of their strength in unidirectional polymer composites. Autoabstract, Mytishchi. 1993.", "81.\tS. Lee, T.R. Kim, A.A. Ogale. Surface and structure modification of carbon nanofibers. Synth. Mater. 2007. Vol.157 P.644-650.", "82.\tR.J. Dienfendorf, E. Tokorsky. High-performance carbon fibers. Polym. Eng. Sci. 1975. Vol.15 P.150-159.", "83.\tC.U. Pittman, Jr. Wu, Z. Jiang, et al. Reactivities of amine functions grafted to carbon fiber surface by tetra ethylenepentamine. Designing interfacial bonding. Carbon. 1997. Vol.35 P.929-943.", "84.\tA.J. Klein. Carbon-carbon composites. Metal prog. 1986. Vol.130 No.5 P.64-68.", "85.\tD. Lozano-Castello, D. Cazola-Amoros. Usefulness of CO2 adsorption at 273K for the characterization of porous carbons. Carbon. 2004. Vol.42 P.1233-1242.", "86.\tP. Bajaj, A. Dhawan. PAN-based activated carbon fibers: Production, characterization and applications. Indian jour. Of Fibre & Textile research. 1997. Vol.22 P.222-235.", "87.\tApplication 62149971, Japan. Method for making a high strength carbon fiber. Noriaki T., Tohru H., Tomiso H .; Tore K. pending 25.12.85, published 3.07.87.", "88.\tSinelnikova R.M. Thermoelectric treatment of carbon fibers and technology for making of high-strength carboplastics. Autoabstract, Moscow. 1998.", "89.\tApplication 6276075 Japan, International Patent Classification4 D 06 M 10/00. Method for carbon fiber reinforcement. Uno H., Asai H., Nakano F. Mitsubishi rayon k. k . No.62-7008; pending 14.1.87; published 30.11.87.", "90.\tM. Fujihira, T. Osa. New challenges in organic electrochemistry. Prog. Batteries Solar Cells. 1979. Vol.2 P.244", "91.\tW. Song, C. Zhao-Hui. Influence of heat treatment on physical-chemical properties of PAN based carbon fiber. Ceram. Int. 2006. Vol.32 P.291-295.", "92.\tY. Eyiti, S. Kimura. Carbon-carbon composite materials. Tanso. 1987. No.130. P.22-33.", "93.\tAfanasyev A.V., Rabinsky L.N., Sershak P.V. Experimental determination of deformation and strength characteristics of polymer composite materials. Mechanics of composite materials and structures. 2010. Vol.16. No.2. P.214-222.", "94.\tSolodilov V.I., Gorbatkina Y.A. Properties of unidirectional carbon plastics based on epoxy resin modified with polysulfone or epoxyurethane oligomer. Mechanics of composite materials and structures. 2008. Vol.14. No.2. P.36-41.", "95.\tPatent 2534794 Russian Federation, International Patent Classification7 D01F 9/22, D04G 5/00. Method of fibrous PAN material binding during the stages of carbon fiber production thereof. Verbets Dmitry Borisovich, Kartazaeva Zoya Valerievna, Nikolaeva Anastasia Vasilievna, Shcherbakova Tatyana Sergeevna; patent applicant and patent holder Open Joint Stock Company \"Scientific research institute of graphite-based construction materials\". No.2013112659/05; pending 21.03.2013; published 10.12.2014; Bulletin No.34. 8p.", "96.\tPatent 2605973 Russian Federation, International Patent Classification7 D01F 9/24, D01F 6/74, C01B 31/02. Fiber is a precursor for carbon fibers, carbon fiber and method for making carbon fiber. Irisawa Toshihira, Hatori Hiroaki, Soneda Yasushi, Kodama Masaya; patent applicant and patent holder NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY. No.2015125543; pending 25.11.2013; published 10.01.2017; Bulletin No.1. 26p", "97.\tPatent 2694030 Russian Federation, International Patent Classification7 C08J 5/06,C08J 5/24, D06M 13/07, C08L 79/08,C08K 7/02. Sized carbon fiber and method for its production. Bulgakov Boris Anatolyevich, Babkin Alexander Vladimirovich, Kepman Alexey Valerievich, Avdeev Victor Vasilievich, Dzhevakov Pavel Borisovich, Korotkov Roman Fedorovich; patent applicant and patent holder Closed Joint Stock Company \"Institute of New Carbon Materials and Technologies\". No. 2017137965; pending 31.10.2017; published 08.07.2019; Bulletin No.19. 30p", "98.\tPatent 2034813 Russian Federation, International Patent Classification7 C04B 35/56. Composite material. Emyashev A.V., Kostikov V.I., Kolesnikov S.A.; patent applicant and patent holder State Research Institute of graphite-based structural materials. No.5055630/33; pending 11.07.1992; published 10.05.1995.", "99.\tPatent 2560362 Russian Federation, International Patent Classification7 D01F 9/12. High-modulus carbon fiber with a modified surface for reinforcing composites and method for its modification. Nikolai Mikhailovich Chernenko, Dmitry Nikolayevich Chernenko, Natalya Yurievna Beilina, Pavel Gennadievich Elizarov, Anatoly Mikhailo