Super liquid-repellent gas membranes for carbon dioxide capture and heart-lung machines.
In a gas membrane, gas is transferred between a liquid and a gas through a microporous membrane. The main challenge is to achieve a high gas transfer while preventing wetting and clogging. With respect to the oxygenation of blood, haemocompatibility is also required. Here we coat macroporous meshes with a superamphiphobic-or liquid repellent-layer to meet this challenge. The superamphiphobic layer consists of a fractal-like network of fluorinated silicon oxide nanospheres; gas trapped between the nanospheres keeps the liquid from contacting the wall of the membrane. We demonstrate the capabilities of the membrane by capturing carbon dioxide gas into a basic aqueous solution and in addition use it to oxygenate blood. Usually, blood tends to clog membranes because of the abundance of blood cells, platelets, proteins and lipids. We show that human blood stored in a superamphiphobic well for 24 h can be poured off without leaving cells or adsorbed protein behind.
Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany.
Maxime
M
Paven
Periklis
P
Papadopoulos
Susanne
S
Schöttler
Xu
X
Deng
Volker
V
Mailänder
Doris
D
Vollmer
Hans-Jürgen
HJ
Butt
D001773:Blood Cells / Q000166:cytology / Q000187:drug effects; D002245:Carbon Dioxide / Q000097:blood*; D002448:Cell Adhesion / Q000187:drug effects; D020099:Coated Materials, Biocompatible / Q000737:chemistry* / Q000494:pharmacology; D004058:Diffusion; D004867:Equipment Design; D005461:Fluorine / Q000737:chemistry; D006355:Heart-Lung Machine; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D054118:Nanospheres / Q000737:chemistry / Q000648:ultrastructure; D010100:Oxygen / Q000097:blood*; D012822:Silicon Dioxide / Q000737:chemistry
D020099:Coated Materials, Biocompatible; D008567:Membranes, Artificial; D002245:Carbon Dioxide; D005461:Fluorine; D012822:Silicon Dioxide; D010100:Oxygen