Featured Research

from universities, journals, and other organizations

Microfluidic Device Tests Fluid Compatibility

Date:
April 16, 2006
Source:
National Institute of Standards and Technology
Summary:
To help industrial engineers improve their ability to systematically test new product formulations, researchers at the National Institute of Standards and Technology (NIST) have developed a microfluidic instrument that quickly measures "interfacial tension." Reporting on their work in the March issue of the journal Lab on a Chip, the researchers say they expect that the device will be especially useful for testing interfaces between complex fluids for applications with scarce amounts of the fluids to be tested.

A new NIST microfluidic instrument measures the mixing compatibility of complex liquids by observing how drops of one fluid flowing within a "river" of a second fluid change in shape as they travel through channels of various sizes.
Credit: S.Hudson/NIST

The key to a great party is inviting guests who mix well and don't instill tension among their fellow revelers. The key to a great detergent, cosmetic, paint or other complex liquid product is pretty much the same--include components that mix well and don't have high levels of what scientists call "interfacial tension," a tendency to bead up and pull away from each other.

To help industrial engineers improve their ability to systematically test new product formulations, researchers at the National Institute of Standards and Technology (NIST) have developed a microfluidic instrument that quickly measures interfacial tension.

The instrument is relatively simple and includes a series of channels ranging from 700 micrometers to 50 micrometers wide. Fluids are pumped toward a "T" intersection where drops of one liquid are pinched off and flow along a "river" of the second liquid. As the spherical drops flow through constriction points in the channel, they speed up and elongate. The degree to which the drops stretch out depends on the interfacial tension between the two fluids. High levels of tension exert more pressure on the drops, keeping them more nearly spherical.

Just as the mood of a party goes through stages, the tension between newly mixed liquids can change over time, and the device tracks these changes as the drops move downstream through the channel. A camera captures 100 pictures per second to record the changes, and an algorithm analyzes the data and produces a measurement in approximately 1 second.

Reporting on their work in the March issue of the journal Lab on a Chip, the researchers say they expect that the device will be especially useful to test fresh interfaces for applications with scarce amounts of the fluids to be tested such as custom-synthesized materials from combinatorial chemistry.

Funding for the research was provided by NIST, ICI/National Starch, and Proctor and Gamble.

*J.T. Cabral and S.D. Hudson. Microfluidic approach for rapid multicomponent interfacial tensiometry. Lab on a Chip. March 2006.


Story Source:

The above story is based on materials provided by National Institute of Standards and Technology. Note: Materials may be edited for content and length.


Cite This Page:

National Institute of Standards and Technology. "Microfluidic Device Tests Fluid Compatibility." ScienceDaily. ScienceDaily, 16 April 2006. <www.sciencedaily.com/releases/2006/04/060415111054.htm>.
National Institute of Standards and Technology. (2006, April 16). Microfluidic Device Tests Fluid Compatibility. ScienceDaily. Retrieved July 25, 2014 from www.sciencedaily.com/releases/2006/04/060415111054.htm
National Institute of Standards and Technology. "Microfluidic Device Tests Fluid Compatibility." ScienceDaily. www.sciencedaily.com/releases/2006/04/060415111054.htm (accessed July 25, 2014).

Share This




More Matter & Energy News

Friday, July 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

TSA Administrator on Politics and Flight Bans

TSA Administrator on Politics and Flight Bans

AP (July 24, 2014) TSA administrator, John Pistole's took part in the Aspen Security Forum 2014, where he answered questions on lifting of the ban on flights into Israel's Tel Aviv airport and whether politics played a role in lifting the ban. (July 24) Video provided by AP
Powered by NewsLook.com
Creative Makeovers for Ugly Cellphone Towers

Creative Makeovers for Ugly Cellphone Towers

AP (July 24, 2014) Mobile phone companies and communities across the country are going to new lengths to disguise those unsightly cellphone towers. From a church bell tower to a flagpole, even a pencil, some towers are trying to make a point. (July 24) Video provided by AP
Powered by NewsLook.com
Algonquin Power Goes Activist on Its Target Gas Natural

Algonquin Power Goes Activist on Its Target Gas Natural

TheStreet (July 23, 2014) When The Deal's Amanda Levin exclusively reported that Gas Natural had been talking to potential suitors, the Ohio company responded with a flat denial, claiming its board had not talked to anyone about a possible sale. Lo and behold, Canadian utility Algonquin Power and Utilities not only had approached the company, but it did it three times. Its last offer was for $13 per share as Gas Natural's was trading at a 60-day moving average of about $12.50 per share. Now Algonquin, which has a 4.9% stake in Gas Natural, has taken its case to shareholders, calling on them to back its proposals or, possibly, a change in the target's board. Video provided by TheStreet
Powered by NewsLook.com
Robot Parking Valet Creates Stress-Free Travel

Robot Parking Valet Creates Stress-Free Travel

AP (July 23, 2014) 'Ray' the robotic parking valet at Dusseldorf Airport in Germany lets travelers to avoid the hassle of finding a parking spot before heading to the check-in desk. (July 23) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

    Health News

      Environment News

        Technology News



          Save/Print:
          Share:

          Free Subscriptions


          Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

          Get Social & Mobile


          Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

          Have Feedback?


          Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
          Mobile: iPhone Android Web
          Follow: Facebook Twitter Google+
          Subscribe: RSS Feeds Email Newsletters
          Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins