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• Graphite-based oil sorbents and flexible materials were prepared by an environment-friendly approach.
• Exfoliated graphite was prepared at room temperature and H2SO4 can be recycled in the preparation process.
• Self-molded graphite-based oil sorbents have a high oil sorption capacity and an excellent reused performance.
• Flexible graphite-based materials have high flexibility, high electrical and thermal conductivity.
Exfoliated graphite (EG) is promising oil sorbent as well as an intermediate product for the preparation of flexible graphite films (FGFs). It has been a critical challenge to energy conservation and pollution abatement for the traditional EG production technique. Here, we propose a simple and effective preparation method to acquire EG in which flake graphite is intercalated and exfoliated at room temperature, not involving any pollutant emission. The influence factors in the preparation process were explored, such as the amount of H2SO4 and H2O2, the temperature for the preparation of room temperature exfoliated graphite (RTEG). In contrast to the EG by high temperature exfoliation (HTEG), RTEG exhibits a homogeneous structure and a significantly increased volume and surface area. Moreover, EG blocks with high oil sorption capacity and excellent reuse performance can be obtained by RTEG method. Especially, FGFs fabricated by RTEG has high flexibility, thermal conductivity and electrical conductivity. It suggests that this environment-friendly technology is suitable for large-scale industrial implementation of graphite-based oil sorbents and flexible materials.
Sorokina NE, Redchitz AV, Ionov SG, Avdeev VV. Different exfoliated graphite as a base of sealing materials. J Phys Chem Solid 2006;67:1202-4.
Chung DDL. Flexible graphite for gasketing, adsorption, electromagnetic interference shielding, vibration damping, electrochemical applications, and stress sensing. J Mater Eng Perform 2000;9:161-3.
Chugh R, Chung DDL. Flexible graphite as a heating element. Carbon 2002;40:2285-9.
Song Y, Feng DY, Liu TY, Li Y, Liu XX. Controlled partial-exfoliation of graphite foil and integration with MnO2 nanosheets for electrochemical capacitors. Nanoscale 2015;7:3581-7.
Yazici MS, Krassowski D, Prakash J. Flexible graphite as battery anode and current collector. J Power Sources 2005;141:171-6.
Parvez K, Wu Z-S, Li R, Liu X, Graf R, Feng X, Muellen K. Exfoliation of graphite into graphene in aqueous solutions of inorganic salts. J Am Chem Soc 2014;136:6083-91.
Celzard A, Mareche JF, Furdin G. Modelling of exfoliated graphite. Prog Mater Sci 2005;50:93-179.
Wang JZ, Manga KK, Bao QL, Loh KP. High-yield synthesis of few-layer graphene flakes through electrochemical expansion of graphite in propylene carbonate electrolyte. J Am Chem Soc 2011;133:8888-91.
Geng XM, Guo YF, Li DF, Li WW, Zhu C, Wei XF, Chen ML, Gao S, Qiu SQ, Gong YP, Wu LQ, Long MS, Sun MT, Pan GB, Liu LW. Interlayer catalytic exfoliation realizing scalable production of large-size pristine few-layer graphene. Sci Rep 2013;3:6.
Lin S, Dong L, Zhang JJ, Lu HB. Room-temperature intercalation and similar to 1000-fold chemical expansion for scalable preparation of high-quality graphene. Chem Mater 2016;28:2138-46.
Liu T, Zhang RJ, Zhang XS, Liu K, Liu YY, Yan PT. One-step room-temperature preparation of expanded graphite. Carbon 2017;119:544-7.
Hou SY, Li JH, Huang XC, Wang XM, Ma LQ, Shen WC, Kang FY, Huang ZH. Silver nanoparticles-loaded exfoliated graphite and its anti-bacterial performance. Appl Sci-Basel 2017;7:11-20.
Bonnissel M, Luo L, Tondeur D. Compacted exfoliated natural graphite as heat conduction medium. Carbon 2001;39:2151-61.
Kim CY, Dang TML, Zhang YRN, Yang JF, Wang B. The alignment of AlN platelets in polymer matrix and its anisotropic thermal properties. J Materiomics 2019;5:679-87.
Chen GH, Wu DJ, Weng WU, Wu CL. Exfoliation of graphite flake and its nanocomposites. Carbon 2003;41:619-21.
Gu WT, Zhang W, Li XM, Zhu HW, Wei JQ, Li Z, Shu QK, Wang C, Wang KL, Shen WC, Kang FY, Wu DH. Graphene sheets from worm-like exfoliated graphite. J Mater Chem 2009;19:3367-9.
Sridhar V, Jeon JH, Oh IK. Synthesis of graphene nano-sheets using eco-friendly chemicals and microwave radiation. Carbon 2010;48:2953-7.
Wen P, Fan MJ, Yang DS, Wang Y, Cheng HL, Wang JQ. An asymmetric supercapacitor with ultrahigh energy density based on nickle cobalt sulfide nanocluster anchoring multi-wall carbon nanotubes hybrid. J Power Sources 2016;320:28-36.
Malas A, Das CK. Influence of modified graphite flakes on the physical, thermo-mechanical and barrier properties of butyl rubber. J Alloys Compd 2017;699:38-46.
Hou D, Liu Q, Wang X, Quan Y, Qiao Z, Yu L, Ding S. Facile synthesis of graphene via reduction of graphene oxide by artemisinin in ethanol. J Materiomics 2018;4:256-65.
Peng W, Zhang J, Lei D, Chang S, Lu H. Interlayer polymerization in chemically expanded graphite for preparation of highly conductive, mechanically strong polymer composites. Chem Mater 2017;29:3412-22.
Focke WW, Badenhorst H, Ramjee S, Kruger HJ, Van Schalkwyk R, Rand B. Graphite foam from pitch and expandable graphite. Carbon 2014;73:41-50.
Wei XH, Liu L, Zhang JX, Shi JL, Guo QG. Mechanical, electrical, thermal performances and structure characteristics of flexible graphite sheets. J Mater Sci 2010;45:2449-55.
Zhang LL, Li HH, Shi YH, Fan CY, Wu XL, Wang HF, Sun HZ, Zhang JP. A novel layered sedimentary rocks structure of the oxygen-enriched carbon for ultrahigh-rate-performance supercapacitors. ACS Appl Mater Interfaces 2016;8:4233-41.
Iamprasertkun P, Krittayavathananon A, Sawangphruk M. N-doped reduced graphene oxide aerogel coated on carboxyl-modified carbon fiber paper for high-performance ionic-liquid supercapacitors. Carbon 2016;102:455-61.
Sun X, Zou Y, Nikiforova V, Kurths J, Walther D. The complexity of gene expression dynamics revealed by permutation entropy. BMC Bioinf 2010;11:607-22.
Stankovich S, Piner RD, Nguyen ST, Ruoff RS. Synthesis and exfoliation of isocyanate-treated graphene oxide nanoplatelets. Carbon 2006;44:3342-7.
Yukselen-Aksoy Y, Kaya A. Comparison of methods for determining specific surface area of soils. J Geotech Geoenviron Eng 2006;132:931-6.
Hong XH, Chung DDL. Exfoliated graphite with relative dielectric constant reaching 360, obtained by exfoliation of acid-intercalated graphite flakes without subsequent removal of the residual acidity. Carbon 2015;91:1-10.
Umukoro EH, Peleyeju MG, Ngila JC, Arotiba OA. Towards wastewater treatment: photo-assisted electrochemical degradation of 2-nitrophenol and orange Ⅱ dye at a tungsten trioxide exfoliated graphite composite electrode. Chem Eng J 2017;317:290-301.
He J, Song LZ, Yang HX, Ren XH, Xing LF. Preparation of sulfur-free exfoliated graphite by a two-step intercalation process and its application for adsorption of oils. J Chem 2017;8.
Inagaki M. Materials science and engineering of carbon: fundamentals. Beijing: Tsinghua University Press; 2014.
Wei T, Fan ZJ, Luo GL, Zheng C, Xie DS. A rapid and efficient method to prepare exfoliated graphite by microwave irradiation. Carbon 2009;47:337-9.
Cunningham BD, Huang J, Baird DG. Review of materials and processing methods used in the production of bipolar plates for fuel cells. Int Mater Rev 2007;52:1-13.
Hoi YM, Chun DDL. Flexible graphite as a compliant thermoelectric material. Carbon 2002;40:1134-6.
Py X, Olives R, Mauran S. Paraffin/porous-graphite-matrix composite as a high and constant power thermal storage material. Int J Heat Mass Tran 2001;44:2727-37.
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