One-pot synthesis, characterization and properties of acid-catalyzed resorcinol/formaldehyde cross-linked silica aerogels and their conversion to hierarchical porous carbon monoliths

被引:36
作者
Chen, Ke [1 ]
Bao, Zhihao [1 ]
Du, Ai [1 ]
Zhu, Xiurong [1 ]
Shen, Jun [1 ]
Wu, Guangming [1 ]
Zhang, Zhihua [1 ]
Zhou, Bin [1 ]
机构
[1] Tongji Univ, Shanghai Key Lab Special Microstruct Mat & Techno, Shanghai 200092, Peoples R China
基金
中国国家自然科学基金;
关键词
Silica aerogels; Resorcinol/formaldehyde; Acid-catalyzed; Hybrid materials; Porous carbon; CHEMISTRY;
D O I
10.1007/s10971-012-2722-x
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A rapid and facile synthesis of resorcinol/formaldehyde cross-linked silica (RF/SiO2) aerogels was carried out in one pot based on an acid-catalyzed route, instead of the previously reported base-catalyzed ones. The gelation time was reduced to several hours at room temperature while it took several days even under heating conditions in the base-catalyzed ones. The interpenetrating network of RF/SiO2 aerogels showed similar porous structures with those of silica aerogels or RF aerogels. Their thermal conductivity was as low as that of the typical glass wool materials. The mechanical properties are characterized by dynamic mechanical analysis and compression testing. At room temperature, the results of compression testing show that the compressive Young's modulus or ultimate failure strength of RF/SiO2 aerogel specimen is higher than that of native SiO2 aerogels with a similar density. The one-pot method improves the efficiency and reduces the cost of RF/SiO2 aerogels. The hierarchical porous carbon monoliths are also converted from carbonized RF/SiO2 aerogels by an additional HF treatment. Hence, they could be further explored as multifunctional candidate materials for thermal, mechanical, and electrochemical applications.
引用
收藏
页码:294 / 303
页数:10
相关论文
共 30 条
[1]   Silica/C composites prepared by the sol-gel method.: Influence of the synthesis parameters on textural characteristics [J].
Aguado-Serrano, J ;
Rojas-Cervantes, ML ;
López-Peinado, AJ ;
Gómez-Serrano, V .
MICROPOROUS AND MESOPOROUS MATERIALS, 2004, 74 (1-3) :111-119
[2]   Synthesis and characterization by FTIR spectroscopy of silica aerogels prepared using several Si(OR)4 and R"Si(OR′)3 precursors [J].
Al-Oweini, Rami ;
El-Rassy, Houssam .
JOURNAL OF MOLECULAR STRUCTURE, 2009, 919 (1-3) :140-145
[3]   Advanced carbon aerogels for energy applications [J].
Biener, Juergen ;
Stadermann, Michael ;
Suss, Matthew ;
Worsley, Marcus A. ;
Biener, Monika M. ;
Rose, Klint A. ;
Baumann, Theodore F. .
ENERGY & ENVIRONMENTAL SCIENCE, 2011, 4 (03) :656-667
[4]   Mechanically reinforced silica aerogel nanocomposites via surface initiated atom transfer radical polymerizations [J].
Boday, Dylan J. ;
Keng, Pei Yuin ;
Muriithi, Beatrice ;
Pyun, Jeffrey ;
Loy, Douglas A. .
JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (33) :6863-6865
[5]   Flexible, low-density polymer crosslinked silica aerogels [J].
Capadona, Lynn A. ;
Meador, Mary Ann B. ;
Alunni, Antonella ;
Fabrizio, Eve F. ;
Vassilaras, Plousia ;
Leventis, Nicholas .
POLYMER, 2006, 47 (16) :5754-5761
[6]   Ultralow density silica aerogels prepared with PEDS [J].
Chao, Xu ;
Jun, Shen ;
Bin, Zhou .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2009, 355 (08) :492-495
[7]   Synthesis of ultrahigh-pore-volume carbon aerogels through a "reinforced-concrete" modified sol-gel process [J].
Chen, Qingjun ;
Long, Donghui ;
Chen, Liang ;
Liu, Xiaojun ;
Liang, Xiaoyi ;
Qiao, Wenming ;
Ling, Licheng .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2011, 357 (01) :232-235
[8]   Hydroxylated cyclophosphazene/silica hybrid materials:: Synthesis and characterization [J].
Dirè, S ;
Facchin, G ;
Ceccato, R ;
Guarino, L ;
Sassi, A ;
Gleria, M .
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS, 2002, 12 (3-4) :59-78
[9]   Advances in Tailoring Resorcinol-Formaldehyde Organic and Carbon Gels [J].
ElKhatat, Ahmed M. ;
Al-Muhtaseb, Shaheen A. .
ADVANCED MATERIALS, 2011, 23 (26) :2887-2903
[10]   ACOUSTIC PROPERTIES AND POTENTIAL APPLICATIONS OF SILICA AEROGELS [J].
GIBIAT, V ;
LEFEUVRE, O ;
WOIGNIER, T ;
PELOUS, J ;
PHALIPPOU, J .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1995, 186 :244-255