Abstract
In order to provide the driving force for the collection and transport of the micro liquid in a microfluidic chip developed by our research group in earlier research,this paper presents a micro positive pressure generator based on the released gas by thermal decomposition of azobisisobutyronitrile(AIBN).The AIBN is fixed to a micro-heater and heated to 70 ℃ to produce a certain amount of positive pressure.Experimental measurements show that this micro positive pressure generator can obtain 182 kPa pressure with heating 8.7 mg of AIBN by a heating current of 900 mA.The designed micro positive pressure generator is a smaller size,pressure controllable and easy to produce,and obtained pressure can satisfy the requirements of transdermal interstitial fluid(ISF) extraction.
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