Preparation and thermal properties of layered porous carbon nanotube/epoxy resin composite films

Abstract

A floating-catalyst spray pyrolysis method was used to synthesize carbon nanotube (CNT) thin films. With the use of ammonium chloride as a pore-former and epoxy resin (EP) as an adhesive, CNT/EP composite films with a porous structure were prepared through the post-heat treatment. These films have excellent thermal insulation (0.029--0.048 W·m⁻¹·K⁻¹) at the thickness direction as well as a good thermal conductivity (40--60 W·m⁻¹·K⁻¹) in the film plane. This study provides a new film material for thermal control systems that demand a good thermal conductivity in the plane but outstanding thermal insulation at the thickness direction.

Keywords

carbon nanotube composite film / layered porous structure / thermal insulation / thermal conductivity / pore-former

References

[1] Kaynakli O. A study on residential heating energy requirement and optimum insulation thickness. Renewable Energy, 2008, 33(6): 1164–1172

[2] Ghazi Wakili K, Binder B, Vonbank R. A simple method to determine the specific heat capacity of thermal insulations used in building construction. Energy and Building, 2003, 35(4): 413–415

[3] Osmani M, Glass J, Price A D F.Architects’ perspectives on construction waste reduction by design. Waste Management, 2008, 28(7): 1147‒1158

[4] Song J, Liu Y, Chen L, . Current research status and development of thermal insulating materials in the world. Materials Review, 2010, 24(S1): 378–380, 394 (in Chinese)

[5] Adamczyk J, Dylewski R. The impact of thermal insulation investments on sustainability in the construction sector. Renewable & Sustainable Energy Reviews, 2017, 80(3): 421–429

[6] Kistler S S. Coherent expanded aerogels and jellies. Nature, 1931, 127(3211): 741

[7] Hüsing N, Schubert U. Aerogels — airy materials: chemistry, structure, and properties. Angewandte Chemie International Edition, 1998, 37(1‒2): 22–45

[8] Maamur K N, Jais U S, Yahya S Y S. Magnetic phase development of iron oxide-SiO₂ aerogel and xerogel prepared using rice husk ash as precursor. Ieice Technical Report Component Parts & Materials, 2010, 103(1217): 294–301

[9] Stocker B, Baiker A. Zirconia aerogels: effect of acid-to-alkoxide ratio, alcoholic solvent and supercritical drying method on structural properties. Journal of Non-Crystalline Solids, 1998, 223(3): 165–178

[10] Hirashima H, Kojima C, Kohama K, . Oxide aerogel catalysts. Journal of Non-Crystalline Solids, 1998, 225(225): 153–156

[11] Gan L, Xu Z, Feng Y, . Synthesis of alumina aerogels by ambient drying method and control of their structures. Journal of Porous Materials, 2005, 12(4): 317–321

[12] Aravind P R, Shajesh P, Soraru G D, . Ambient pressure drying: a successful approach for the preparation of silica and silica based mixed oxide aerogels. Journal of Sol-Gel Science and Technology, 2010, 54: 105–117

[13] Dong Z, Yan J, Tu H, . Studying on the preparation and application of silica aerogel composites for thermal insulation. New Chemical Materials, 2005, 33(3): 46–48

[14] Peng B, Locascio M, Zapol P, . Measurements of near-ultimate strength for multiwalled carbon nanotubes and irradiation-induced crosslinking improvements. Nature Nanotechnology, 2008, 3(10): 626–631

[15] Stankovich S, Dikin D A, Dommett G H, . Graphene-based composite materials. Nature, 2006, 442(7100): 282–286

[16] De Volder M F, Tawfick S H, Baughman R H, . Carbon nanotubes: present and future commercial applications. Science, 2013, 339(6119): 535–539

[17] Zhang H, He X, Li Y. Synthesis and characterization of SiO₂ thermal insulation aerogel doped CNTs. Rare Metal Materials and Engineering, 2007, 36(S1): 567–569 (in Chinese)

[18] Kohlmeyer R, Lor M, Deng J, . Preparation of stable carbon nanotube aerogels with high electrical conductivity and porosity. Carbon, 2011, 49(7): 2352–2361

[19] Wu Z S, Yang S, Sun Y, . 3D nitrogen-doped graphene aerogel-supported Fe₃O₄ nanoparticles as efficient electrocatalysts for the oxygen reduction reaction. Journal of the American Chemical Society, 2012, 134(22): 9082–9085

[20] Dong L, Yang Q, Xu C, . Facile preparation of carbon nanotube aerogels with controlled hierarchical microstructures and versatile performance. Carbon, 2015, 90: 164–171

[21] Mikhalchan A, Fan Z, Tran T Q, . Continuous and scalable fabrication and multifunctional properties of carbon nanotube aerogels from the floating catalyst method. Carbon, 2016, 102: 409–418

[22] Jiang Y, Xu Z, Huang T, . Direct 3D printing of ultralight graphene oxide aerogel microlattices. Advanced Functional Materials, 2018, 28(16): 1707024

[23] Wu Z Y, Li C, Liang H W, . Ultralight, flexible, and fire-resistant carbon nanofiber aerogels from bacterial cellulose. Angewandte Chemie International Edition, 2013, 52(10): 2925–2929

[24] Chien H, Cheng W, Wang Y, . Ultrahigh specific capacitances for super capacitors achieved by nickel cobaltite/carbon aerogel composites. Advanced Functional Materials, 2012, 22(23): 5038–5043

[25] Si Y, Wang X, Yan C, . Ultralight biomass-derived carbonaceous nanofibrous aerogels with superelasticity and high pressure-sensitivity. Advanced Materials, 2016, 28(43): 9512–9518

[26] Lin Z, Zeng Z, Gui X, . Carbon nanotube sponges, aerogels, and hierarchical composites: Synthesis, properties, and energy applications. Advanced Energy Materials, 2016, 6: 1600554–26 pages)

[27] Xu W, Chen Y, Zhan H, . High-strength carbon nanotube film from improving alignment and densification. Nano Letters, 2016, 16(2): 946–952

[28] Sun H, Xu Z, Gao C. Multifunctional, ultra-flyweight, synergistically assembled carbon aerogels. Advanced Materials, 2013, 25(18): 2554–2560

Acknowledgements

This research was supported by the National Key R&D Program of China (2018YFA0208404), the National Natural Science Foundation of China (U1362104), and the Innovation Program of Shanghai Municipal Education Commission.

RIGHTS & PERMISSIONS

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