Title:
PROCESS FOR PRODUCING POROUS SILICA, AND POROUS SILICA
Document Type and Number:
WIPO Patent Application WO/2011/108649
Kind Code:
A1
Abstract:
Provided is porous silica which can be easily obtained so as to have various shapes, has excellent transparency, is capable of being obtained as nanoparticles, and can be obtained at a high efficiency even when a cationic surfactant having 7 or less carbon atoms is used. A cationic surfactant having a C2-7 hydrophobic moiety is dispersed in an alkoxysilane, and water having a pH regulated to 0-2 is added thereto in an amount of 2-4 equivalents to the alkoxysilane. The alkoxysilane is mildly hydrolyzed to obtain monolithic mesoporous silica having a pore diameter of 0.5-2 nm, excluding 2 nm. Addition of an organic silane to the system renders delicate control of pore diameter possible. By adding polyethylene glycol to the synthesis system, monolithic mesoporous silica nanoparticles are obtained. A precursor solution which has not gelled is: (1) dropped into a basic aqueous solution to obtain mesoporous silica beads or the like; (2) applied to a substrate by spin coating to obtain a thin film; or (3) ejected by means of a spinner to obtain a fiber.
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Inventors:
IMAI HIROAKI (JP)
OAKI YUYA (JP)
WATANABE HIROTO (JP)
OAKI YUYA (JP)
WATANABE HIROTO (JP)
Application Number:
PCT/JP2011/054928
Publication Date:
September 09, 2011
Filing Date:
March 03, 2011
Export Citation:
Assignee:
TOKYO METRO IND TECH RES INST (JP)
UNIV KEIO (JP)
IMAI HIROAKI (JP)
OAKI YUYA (JP)
WATANABE HIROTO (JP)
UNIV KEIO (JP)
IMAI HIROAKI (JP)
OAKI YUYA (JP)
WATANABE HIROTO (JP)
International Classes:
C01B37/00
Foreign References:
| JP2003335515A | 2003-11-25 | |||
| JP2009013142A | 2009-01-22 | |||
| JP2009269767A | 2009-11-19 |
Other References:
J.S.BECK; J.C.VARTULI; G.J.KENNEDY; C.T.KRESGE; W.J.ROTH; S. E. SCHRAMM, CHEM. MATER., vol. 6, 1994, pages 1816
T. SAWADA; T. YANO; N. ISSHIKI; T. ISSHIKI; M. IWAMOTO, BULL. CHEM. SOC. JPN., vol. 81, 2008, pages 407
YAN DI; XIANGJU MENG; LIFENG WANG; SHOUGUI LI; FENG-SHOU XIAO, LANGMUIR, vol. 22, 2006, pages 3068
RENLIANG WANG; SHUHUA HAN; WANGUO HOU; LIXIN SUN; JUN ZHAO; YOUSHAO WANG, J. PHYS. CHEM. C, vol. 111, 2007, pages 10955
K. KOSUGE; S. KUBO; N. KIKUKAWA; M. TAKEMORI, LANGMUIR, vol. 23, 2007, pages 3095
HAIFENG YANG; QIHUI SHI; BOZHI TIAN; SONGHAI XIE; FUQIANG ZHANG; YAN YAN; BO TU; DONGYUAN ZHAO, CHEM. MATER., vol. 15, 2003, pages 536
JEROME BABIN; JULIEN IAPICHELLA; BENOIT LEFEVRE; CHRISTINE BIOLLEY; JEAN-PIERRE BELLAT; FRANCOIS FAJULAA; ANNE GALARNEAU, NEW J. CHEM., vol. 31, 2007, pages 1907
See also references of EP 2543636A4
T. SAWADA; T. YANO; N. ISSHIKI; T. ISSHIKI; M. IWAMOTO, BULL. CHEM. SOC. JPN., vol. 81, 2008, pages 407
YAN DI; XIANGJU MENG; LIFENG WANG; SHOUGUI LI; FENG-SHOU XIAO, LANGMUIR, vol. 22, 2006, pages 3068
RENLIANG WANG; SHUHUA HAN; WANGUO HOU; LIXIN SUN; JUN ZHAO; YOUSHAO WANG, J. PHYS. CHEM. C, vol. 111, 2007, pages 10955
K. KOSUGE; S. KUBO; N. KIKUKAWA; M. TAKEMORI, LANGMUIR, vol. 23, 2007, pages 3095
HAIFENG YANG; QIHUI SHI; BOZHI TIAN; SONGHAI XIE; FUQIANG ZHANG; YAN YAN; BO TU; DONGYUAN ZHAO, CHEM. MATER., vol. 15, 2003, pages 536
JEROME BABIN; JULIEN IAPICHELLA; BENOIT LEFEVRE; CHRISTINE BIOLLEY; JEAN-PIERRE BELLAT; FRANCOIS FAJULAA; ANNE GALARNEAU, NEW J. CHEM., vol. 31, 2007, pages 1907
See also references of EP 2543636A4
Attorney, Agent or Firm:
TSUTSUI, Yamato et al. (JP)
Tsutsui Daiwa (JP)
Tsutsui Daiwa (JP)
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