Temperature-sensitive switch from composite poly(N-isopropylacrylamide) sponge gels
- BATTELLE (PACIFIC NW LAB)
Thermally sensitive polymers change their properties with a change in environmental temperature in a predictable and pronounced way. These changes can be expected in drug delivery systems, solute separation, enzyme immobilization, energy-transducer processes, and photosensitive materials. We have demonstrated a thermal-sensitive switch module, which is capable of converting thermal into mechanical energy. We employed this module in the control of liquid transfer. The thermally sensitive switch was prepared by cross-linking poly(N-isopropylacrylamide) (PNIPAAm) gel inside the pores of a sponge to generate the composite PNIPAAm/sponge gel. This gel, contained in a polypropylene tube, was inserted into a thermoelectric module equipped with a fine temperature controller. As the water flux through the composite gel changes from 0 to 6.6 x 10{sup 2} L m{sup -2} h, with a temperature change from 23 to 40 degrees C, we can reversibly turn on and off the thermally sensitive switch.
- Research Organization:
- Pacific Northwest National Lab., Richland, WA (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 15001452
- Report Number(s):
- PNNL-SA-31643; TRN: US200404%%136
- Journal Information:
- Journal of Applied Polymer Science, Vol. 75, Issue 14; Other Information: PBD: 1 Dec 1999
- Country of Publication:
- United States
- Language:
- English
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