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Synthesis of monolithic carbon aerogels with high mechanical strength via ambient pressure drying without solvent exchange
Yang, Zhi1,2; Li, Jian1; Xu, Xiaojing3; Pang, Shengyang1; Hu, Chenglong1; Guo, Penglei1,2; Tang, Sufang1; Cheng, Hui-Ming1
Corresponding AuthorTang, Sufang(sftang@imr.ac.cn)
2020-08-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume50Pages:66-74
AbstractA simple, fast and cost-effective method for monolithic carbon aerogels (CAs) preparation was proposed through sol-gel polycondensation of resorcinol with formaldehyde in a basic aqueous solution followed by ambient pressure drying without solvent exchange, and carbonization. The microstructure and network strength of CAs were tailored by adjusting the catalyst concentration ([resorcinol]/[sodium carbonate] in the range of 300-2000), water content ([deionized water]/[resorcinol] equals to 17 and 24, respectively), and gelation temperature (T(gel )in the range of 30-90 degrees C). Resultantly, the CAs with a wide range of density (0.30-1.13 g/cm(3)), high specific surface area (465-616 m(2)/g), high compressive strength (6.5-147.4 MPa) and low thermal conductivity (0.065-0.120 W m(-1) K-1) were obtained in this work. Moreover, the largesized CAs (100 x 100 x 20 mm(3)) can also be prepared by this method since the formed robust skeleton network can resist shrinkage/collapse of pore structure and prevent cracking during drying. The improved mechanical strength and monolithic forming abilities could be mainly attributed to the uniform arrangement of carbon particles and pores, fine particle size, abundant network structure and enhanced particle neck. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordCarbon aerogels Ambient pressure drying High mechanical strength Thermal insulation
Funding OrganizationMajor Program ofAerospace Advanced Manufacturing Technology Research Foundation of NSFC ; CASC, China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; Research Fund of Youth Innovation Promotion Association of CAS, China ; National Key R&D Program of China
DOI10.1016/j.jmst.2020.02.013
Indexed BySCI
Language英语
Funding ProjectMajor Program ofAerospace Advanced Manufacturing Technology Research Foundation of NSFC ; CASC, China[U1537204] ; National Natural Science Foundation of China[51802313] ; National Natural Science Foundation of China[51902315] ; National Science and Technology Major Project[2017-VI-0020-0093] ; Research Fund of Youth Innovation Promotion Association of CAS, China[2014171] ; National Key R&D Program of China[2018YFF01013600]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000537588800007
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/139133
Collection中国科学院金属研究所
Corresponding AuthorTang, Sufang
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
3.China Acad Launch Vehicle Technol, Aerosp Business Dept, Beijing 100076, Peoples R China
Recommended Citation
GB/T 7714
Yang, Zhi,Li, Jian,Xu, Xiaojing,et al. Synthesis of monolithic carbon aerogels with high mechanical strength via ambient pressure drying without solvent exchange[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,50:66-74.
APA Yang, Zhi.,Li, Jian.,Xu, Xiaojing.,Pang, Shengyang.,Hu, Chenglong.,...&Cheng, Hui-Ming.(2020).Synthesis of monolithic carbon aerogels with high mechanical strength via ambient pressure drying without solvent exchange.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,50,66-74.
MLA Yang, Zhi,et al."Synthesis of monolithic carbon aerogels with high mechanical strength via ambient pressure drying without solvent exchange".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 50(2020):66-74.
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