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Title: Mobile monolithic polymer elements for flow control in microfluidic devices

Abstract

A cast-in-place and lithographically shaped mobile, monolithic polymer element for fluid flow control in microfluidic devices and method of manufacture. Microfluid flow control devices, or microvalves that provide for control of fluid or ionic current flow can be made incorporating a cast-in-place, mobile monolithic polymer element, disposed within a microchannel, and driven by either fluid or gas pressure against a retaining or sealing surface. The polymer elements are made by the application of lithographic methods to monomer mixtures formulated in such a way that the polymer will not bond to microchannel walls. The polymer elements can seal against pressures greater than 5000 psi, and have a response time on the order of milliseconds. By the use of energetic radiation it is possible to depolymerize selected regions of the polymer element to form shapes that cannot be produced by conventional lithographic patterning and would be impossible to machine.

Inventors:
; ;
Issue Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174999
Patent Number(s):
6782746
Application Number:
09/695,816
Assignee:
Sandia National Laboratories
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16K - VALVES
G - PHYSICS G01 - MEASURING G01F - MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING

Citation Formats

Hasselbrink, Jr., Ernest F., Rehm, Jason E., and Shepodd, Timothy J. Mobile monolithic polymer elements for flow control in microfluidic devices. United States: N. p., 2004. Web.
Hasselbrink, Jr., Ernest F., Rehm, Jason E., & Shepodd, Timothy J. Mobile monolithic polymer elements for flow control in microfluidic devices. United States.
Hasselbrink, Jr., Ernest F., Rehm, Jason E., and Shepodd, Timothy J. Tue . "Mobile monolithic polymer elements for flow control in microfluidic devices". United States. https://www.osti.gov/servlets/purl/1174999.
@article{osti_1174999,
title = {Mobile monolithic polymer elements for flow control in microfluidic devices},
author = {Hasselbrink, Jr., Ernest F. and Rehm, Jason E. and Shepodd, Timothy J.},
abstractNote = {A cast-in-place and lithographically shaped mobile, monolithic polymer element for fluid flow control in microfluidic devices and method of manufacture. Microfluid flow control devices, or microvalves that provide for control of fluid or ionic current flow can be made incorporating a cast-in-place, mobile monolithic polymer element, disposed within a microchannel, and driven by either fluid or gas pressure against a retaining or sealing surface. The polymer elements are made by the application of lithographic methods to monomer mixtures formulated in such a way that the polymer will not bond to microchannel walls. The polymer elements can seal against pressures greater than 5000 psi, and have a response time on the order of milliseconds. By the use of energetic radiation it is possible to depolymerize selected regions of the polymer element to form shapes that cannot be produced by conventional lithographic patterning and would be impossible to machine.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {8}
}

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Works referenced in this record:

Microflow devices and systems
journal, December 1994


Functional hydrogel structures for autonomous flow control inside microfluidic channels
journal, April 2000