REVERSIBLE ON-OFF SWITCH FUNCTION OF ION-TRACK PORES FOR THERMORESPONSIVE FILMS BASED ON COPOLYMERS CONSISTING OF DIETHYLENEGLYCOL-BIS-ALLYLCARBONATE AND ACRYLOYL-L-PROLINE METHYL-ESTER
M. Yoshida et al., REVERSIBLE ON-OFF SWITCH FUNCTION OF ION-TRACK PORES FOR THERMORESPONSIVE FILMS BASED ON COPOLYMERS CONSISTING OF DIETHYLENEGLYCOL-BIS-ALLYLCARBONATE AND ACRYLOYL-L-PROLINE METHYL-ESTER, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 122(1), 1997, pp. 39-44
Intelligent chemical valves responding to a slight change of temperatu
re were created by the combination of ion beam-chemical etching techni
que and a novel material consisting of an ion track detector material
diethyleneglycol-bis-allylcarbonate (CR-39) and a thermo-responsive ge
l acryloyl-L-proline methyl eater (A-ProOMe). The changes in size of i
on-track pores in etched films were measured microscopically by repeti
tion between 0 and 30 degrees C at 24-h intervals for a 50 mu m thick
copoly(CR-39/A-ProOMe, 60/40 mol%) film which was obtained by etching
in aqueous 6M NaOH solution at 60 degrees C after an 11.6 MeV/n Pb-208
ion irradiation and, as a result, it was found that the pore size in
the film obtained by etching for 10 min is reversibly changed from a p
erfectly closed pore at 0 degrees C to a fully opened pore with a diam
eter of 0.30 mu m at 30 degrees C.