Microstructural investigations of carbon foams derived from modified coal-tar pitch
نویسندگان
چکیده
منابع مشابه
Carbon Foam Production from a Thermo- Chemically Modified Commercial Coal Tar Pitch
Introduction The unique properties of carbon foam mainly depend on the precursor features and synthesis conditions. For the highly thermal and electrical conductive carbon foam, an anisotropic pitch precursor is required [1, 2]. A lot of factors influence the foaming process, but temperature and pressure are the most critical aspects [3]. The aim of the present investigations is to adjust by ap...
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Poly(carbosilane) or PCS, {–CH2–SiH(CH3)–}n, is used as a Si-bearing precursor in combination with a coal tar pitch to study thermally induced transformations toward SiC-modified carbon composites. Following mixing of the components in the molten pitch at 160oC, the mixture is heated under argon atmosphere at 500oC yielding a solid carbonizate that is further subjected to separate pyrolysis exp...
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This paper presents a novel method of manufacturing carbon foams from coals with a bimodal porosity structure (macroand microporosity), by means of a carbonisation process at 450 or 475 °C that produces the carbon foam, followed by chemical activation with zinc chloride at 500 °C. The activation agent influences the development of macroporosity during the foaming step and gives rise to micropor...
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Adsorption of m-aminophenol and p-nitrophenol from aqueous solution on activated carbon synthesized on the base of industrial by product (coal tar pitch) and furfural was investigated. The adsorption capacity of the activated carbon and its oxidized modification is related to the surface area and composition of the prepared materials, as well as to the nature of the adsorbents. Despite the mode...
متن کاملControl of microstructural heterogeneities in carbon nanotube foams
Arrays of aligned carbon nanotubes (CNTs) under compression are known to exhibit a dissipative hysteretic response similar to classical foams. Here, we control the microstructure of the arrays during synthesis using a variable supply of carbon source and catalyst. We control CNT alignment and density along the array height, creating bands of highand low-density regions. We study the dynamic res...
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ژورنال
عنوان ژورنال: Micron
سال: 2016
ISSN: 0968-4328
DOI: 10.1016/j.micron.2016.07.006