| 摘要 |
Disclosed is a method and system for controlling the flow of an organic liquid by flowing an organic liquid through a pipe having an upstream end with an unconstricted portion and and a downstream end with a constricted portion, the constricted portion having an inner diameter that is at least 10% smaller than the inner diameter of the unconstricted portion, and a porous plug formed of sol-gel derived particles in the pipe, the plug having a length at least two times the diameter of the pipe. Also disclosed is a method and system, the system including a housing having a liquid inlet and a liquid outlet and containing a sol-gel derived composition and a liquid pressure sensitive control means operatively connected to the liquid inlet for controlling the flow of the organic liquid, contacting the sol-gel derived composition to actuate the liquid pressure sensitive control means and controlling the flow of the organic liquid in response to the actuation.
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