ID
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chementator Briefs
Polyesters Customizing the macroscale properties of polyesters by using sidechain…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEENGINEERING PRACTICEENVIRONMENTAL MANAGEREQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More SHOW PREVIEWS

Comment

Dual-functioning MOFs maintain a comfortable room humidity

By Gerald Ondrey |

Researchers from the King Abdullah University of Science and Technology (KAUST; Thuwal, Saudi Arabia; www.kaust.edu.sa) have developed a metal-organic framework (MOF) material that can regulate the humidity levels within the “window” established by the American Society of Heating, Refrigeration and Air Conditioning Engineers. The materials may also find applications controlling the humidity in control rooms, aircraft cabins or other enclosed spaces.

Mohamed Eddaoudi and his team in the Advanced Membranes and Porous Materials Center assembled water-stable Y-shp-MOF-5, which is a highly connected MOF in which rare earth-metal-based clusters are connected by 12 organic linkers.

This material was found to selectively adsorb water, depending on the relative humidity (RH). When the RH exceeds 55%, the water adsorption increases dramatically, thereby reducing the humidity in the room. If the RH falls below 45%, the absorbed water is released. As a result, the MOFs can autonomously maintain the RH at the comfortable range of 45–65%, say the researchers. The material was shown to retain this behavior after more than 1,000 adsorption-desorption cycles.

The presence of the high proportion of organic (hydrophobic) linkers are thought to be responsible for the MOFs’ low water adsorption at low RH. “Only at higher water-vapor pressure is the hydrophobicity overcome, as water molecules form rapidly growing clusters within the MOF’s pores, says Abdul Halim, one of Eddaoudi’s doctoral students.

Eddaoudi says the team is pursuing the development of new MOFs with similar adsorption-desorption properties, but with superior water-uptake capacity. The details of the research are reported in a recent issue of the J. of the Am. Chem. Soc.n

Related Content
Commercial MOFs on the horizon
A partnership between materials company NuMat Technologies (Skokie, Ill.; www.numat-tech.com) and The Linde Group (Munich, Germany; www.the-linde-group.com) is set to…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Purdue University Saves $400,000 Annually with Local Vacuum Networks
Bag filter Housings/Vessels
Innovative Backwashable Media Filter
Automated Vertical Tower Filter Press
Visit VACUUBRAND at ACS in San Francisco!

View More

Live chat by BoldChat