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New method for synthesis of carbon foam on the base of mixture of coal tar pitch and furfural without using pressure and stabilization treatment
Diamond and Related Materials ( IF 4.1 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.diamond.2020.108066
Ivanka Stoycheva , Boyko Tsyntsarski , Miglena Vasileva , Bilyana Petrova , Georgi Georgiev , Temenuzhka Budinova , Urszula Szeluga , Slawomira Pusz , Angelina Kosateva , Nartzislav Petrov

Abstract Carbon foam is an advanced porous material with multiple high-technology applications, due to its cell structure, light weight, high thermal stability, high thermal and electrical conductivity, as well as exceptional electromagnetic and acoustic properties. This work is dedicated to development of a new method for synthesis of carbon foam from a mixture of organic substances with suitable chemical properties and appropriate oxidation treatment, which allows synthesis of foam without the use of high pressure and stabilization step. The appropriate treatment conditions (thermo-oxidative modification with conc. H2SO4 or conc. HNO3 of mixtures of furfural and industrial coal tar pitch in different proportions), allowing the formation of porous structure of the resulting carbon foam, are established. The properties of the synthesized carbon foam can be controlled by varying the composition of the starting mixture and the type of oxidant. The formation mechanism of the porous structure of carbon foams is considered. Obtained carbon foam samples are characterized by XRD, Scanning Electron Microscopy, TG and DSC analysis, elemental analysis. The proposed new, less energy consuming synthesis method enables the production of carbon foam with very good physico-chemical properties.

中文翻译:

一种以煤焦油沥青和糠醛混合物为原料不经加压稳定处理合成碳泡沫的新方法

摘要 碳泡沫是一种先进的多孔材料,具有泡孔结构、重量轻、热稳定性高、导热和导电性高以及优异的电磁和声学特性,具有多种高科技应用。这项工作致力于开发一种由具有合适化学性质和适当氧化处理的有机物质混合物合成碳泡沫的新方法,该方法允许在不使用高压和稳定步骤的情况下合成泡沫。适当的处理条件(用浓 H2SO4 或浓 HNO3 以不同比例的糠醛和工业煤焦油沥青的混合物进行热氧化改性),允许形成所得碳泡沫的多孔结构。合成碳泡沫的性质可以通过改变起始混合物的组成和氧化剂的类型来控制。考虑了碳泡沫多孔结构的形成机制。获得的碳泡沫样品通过XRD、扫描电子显微镜、TG和DSC分析、元素分析进行​​表征。所提出的新的、能耗更低的合成方法能够生产具有非常好的物理化学特性的碳泡沫。
更新日期:2020-11-01
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