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      Effects of Carbonization Temperature on Mechanical and Thermal Insulation Properties of Carbon Aerogel Composites using Phenolic Fibers as Reinforcement

      1 , 1 , 1 , 1 , 1 , 1
      Journal of Nanomaterials
      Hindawi Limited

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          Abstract

          A series of carbon fiber-reinforced carbon aerogel composites (C/CAs) were prepared via carbonizing phenolic fibers impregnated organic aerogel at temperatures ranging from 1,000 to 1,600°C. Phenolic fiber as soft reinforcement shrinks synchronously with the aerogel matrix during the preparation process, which effectively avoided microcracks and achieved an excellent reinforcement effect. The effects of carbonization temperatures on the mechanical and thermal insulation properties of the C/CAs were investigated via pore structural and morphological analysis, as well as the characterization of mechanical strength and thermal conductivity. The results show that the compressive strength of C/CA is 1.26–2.14 MPa in xy-direction and 0.55–1.20 MPa in z-direction. The obtained bending strength range from 1.92 to 3.62 MPa with the carbonization temperature increase from 1,000 to 1,600°C. The thermal conductivity of C/CA-1000 at 1,800°C is 0.1637 W·m−1·K−1 while that of reached 0.2713 W·m−1·K−1 of C/CA-1600. Further study found that the change of porosity and pore size caused by the closure of micropores at high temperatures should be responsible for performance evolution.

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          Most cited references26

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          Physisorption of gases, with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)

          Gas adsorption is an important tool for the characterisation of porous solids and fine powders. Major advances in recent years have made it necessary to update the 1985 IUPAC manual on Reporting Physisorption Data for Gas/Solid Systems. The aims of the present document are to clarify and standardise the presentation, nomenclature and methodology associated with the application of physisorption for surface area assessment and pore size analysis and to draw attention to remaining problems in the interpretation of physisorption data.
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            Ultralight and fire-resistant ceramic nanofibrous aerogels with temperature-invariant superelasticity

            Ultralight and fire-resistant ceramic nanofibrous aerogels with temperature-invariant superelasticity to 1100°C.
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              Porous carbon xerogels with texture tailored by pH control during sol–gel process

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                Author and article information

                Contributors
                Journal
                Journal of Nanomaterials
                Journal of Nanomaterials
                Hindawi Limited
                1687-4129
                1687-4110
                February 12 2023
                February 12 2023
                : 2023
                : 1-9
                Affiliations
                [1 ]Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, 109 De Ya Rd, Changsha 410073, Hunan, China
                Article
                10.1155/2023/1113343
                da63955e-f514-430f-b601-cdb4f7addb5b
                © 2023

                https://creativecommons.org/licenses/by/4.0/

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