Title:
METHOD OF CONTROLLING FLUID
Document Type and Number:
WIPO Patent Application WO/2005/032707
Kind Code:
A1
Abstract:
A method of controlling the fluid flow in a microchannel, the microchannel at least a region of its surface having a hydrophilization part constituted of a substance capable of lowering a water contact angle upon being irradiated with light, which method is characterized in that it comprises (1) irradiating the hydrophilization part with light to thereby lower the water contact angle of the surface thereof (hydrophilization step); (2) causing a water contact angle control material containing a water contact angle increasing substance capable of providing a surface of water contact angle larger than the water contact angle of the hydrophilization part after the water contact angle lowering to discharge the water contact angle increasing substance (discharge step); and (3) bringing the discharged water contact angle increasing substance into contact with the surface of the hydrophilization part and adhering the water contact angle increasing substance to the surface to thereby increase the water contact angle of the hydrophilization part (hydrophobization step). There is further provided a valve utilizing this method. Thus, a fluid control method and valve by which hydrophilization and hydrophobization in the microchannel can be easily performed in noncontact form without any mobile part become available.
Inventors:
NAGAI HIDENORI (JP)
WAKIDA SHINICHI (JP)
TAKAHASHI JUNKO (JP)
WAKIDA SHINICHI (JP)
TAKAHASHI JUNKO (JP)
Application Number:
PCT/JP2004/014499
Publication Date:
April 14, 2005
Filing Date:
October 01, 2004
Export Citation:
Assignee:
NAT INST OF ADVANCED IND SCIEN (JP)
DAIKIN IND LTD (JP)
NAGAI HIDENORI (JP)
WAKIDA SHINICHI (JP)
TAKAHASHI JUNKO (JP)
DAIKIN IND LTD (JP)
NAGAI HIDENORI (JP)
WAKIDA SHINICHI (JP)
TAKAHASHI JUNKO (JP)
International Classes:
B01J19/00; B01L3/00; F15C5/00; F16K99/00; G01N27/447; (IPC1-7): B01J19/00; G01N37/00
Foreign References:
| JP2003230829A | 2003-08-19 | |||
| JP2003047832A | 2003-02-18 | |||
| JP2001158606A | 2001-06-12 | |||
| JPH10267801A | 1998-10-09 | |||
| JP2001158606A | 2001-06-12 | |||
| JP2756474B2 | 1998-05-25 | |||
| JP2865065B2 | 1999-03-08 |
Other References:
J. MOORTHY ET AL., SENSORS AND ACTUATORS B, vol. 75, 2001, pages 223 - 229
See also references of EP 1683570A4
See also references of EP 1683570A4
Attorney, Agent or Firm:
Asahina, Sohta (2-22 Tanimachi 2-chome, Chuo-k, Osaka-shi Osaka, JP)
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