Pressure-sensitive hydrogels

Studies on pressure-sensitive hydrogels are quite scarce. Pressure investigations were done on the following polymers poly(N-isopropyl acrylamide), poly(N-n-propylacrylamide), and poly(N,N-diethylacrylamide), all of which are... 

Two kinds of temperature-sensitive hydrogel microvalves have been shown in the literature. The first kind of microvalve uses a monolithic piece of hydrogel, which swells and shrinks as a function of temperature to open or close a microchannel. An example of such a microvalve was shown by Yu et al. [4]. Actuation times are relatively short at 3.5-5 s and a holding pressure of 1.38 MPa was reported. 

Washington, D.C., 20th-24th Aug.2000, p. 1667-8 RHEOLOGY OF PRESSURE-SENSITIVE ADHESIVE HYDROGELS DESIGNED FOR SKIN APPLICATION... 

The glucose-induced osmotic swelling pressure of the PBA-containing, glucose-sensitive hydrogel can be measured by confining it between a porous membrane and the diaphragm of a miniature pressure transducer. In this... 

Herber, S., Bomer, J., Olthuis, W., Bergveld, P. and van den Berg, A. (2005) A miniaturized carbon dioxide gas sensor based on sensing of pH-sensitive hydrogel swelUng with a pressure sensor. Biomedical Microdevices, 7,197-204. 

---