Controlled Liquid Flow in a Microfluidic Network with Pressure Sensitive Valves based on Polydimethylsiloxane (PDMS)/Neodymium (NdFeB) Composites
Abstract(#br)We present the application of a composite material, consisting of a ferromagnetic neodymium powder and a silicone elastomer, alone to realize a microfluidic network with pressure sensitive passive valves. The mixing ratio of the composite and the degree of magnetization can be utilized to adjust the switching point of each single valve. By combining differently adjusted valves within a microfluidic network it is possible to realize a sort of liquid logic and to control the flow in the network just by changing the inward flow respectively pressure.