In a previous entry I did I had written about Thin Layer Chromatography, how it works, why it’s used, and the solvents used to separate the samples spotted on TLC plates. This is sort of a branch off of that blog, as there’s something new I wanted to talk about.
Wonder material graphene has revealed another of its extraordinary properties — University of Manchester researchers have found that it is superpermeable with respect to water.
Graphene is one of the wonders of the science world, with the potential to create foldaway mobile phones, wallpaper-thin lighting panels and the next generation of aircraft. The new finding at the University of Manchester gives graphene’s potential a most surprising dimension — graphene can also be used for distilling alcohol.
In a report published in Science, a team led by Professor Sir Andre Geim shows that graphene-based membranes are impermeable to all gases and liquids (vacuum-tight). However, water evaporates through them as quickly as if the membranes were not there at all.
This newly-found property can now be added to the already long list of superlatives describing graphene. It is the thinnest known material in the universe and the strongest ever measured. It conducts electricity and heat better than any other material. It is the stiffest one too and, at the same time, it is the most ductile. Demonstrating its remarkable properties won University of Manchester academics the Nobel Prize in Physics in 2010.
Now the University of Manchester scientists have studied membranes from a chemical derivative of graphene called graphene oxide. Graphene oxide is the same graphene sheet but it is randomly covered with other molecules such as hydroxyl groups OH-. Graphene oxide sheets stack on top of each other and form a laminate.
The researchers prepared such laminates that were hundreds times thinner than a human hair but remained strong, flexible and were easy to handle.
When a metal container was sealed with such a film, even the most sensitive equipment was unable to detect air or any other gas, including helium, to leak through.
It came as a complete surprise that, when the researchers tried the same with ordinary water, they found that it evaporates without noticing the graphene seal. Water molecules diffused through the graphene-oxide membranes with such a great speed that the evaporation rate was the same independently whether the container was sealed or completely open.
This is a petition on the Directgov website - this goes straight through to parliment and at the current time of posting it only has 21 signatures
I know a lot of people are reblogging the one sponsored by anonymous which is great but if you live in the UK, this is going to be your best best at getting yourself heard about ACTA - even if you don’t live in the UK or even the EU, PLEASE REBLOG THIS, as ACTA is something that not only affects Europe but the rest of the world as well and this could be one of the only opportunities for it to be downturned
America isn’t the only ones having problems, guys. The same way SOPA and PIPA threatened the future of all countries through example, ACTA is working on settling in as one of the many bricks in the wall.
Reblog, sign, do what you can.
why does this only have like 2000 signatures? sign!!
If you’re a British citizen, sign. It won’t let me.
“The mystical healing properties of tears are invoked in fairy tales and fantasies from Rapunzel to Harry Potter. So it may surprise you to hear that tears really are pretty powerful, on the microbial level at least.”—