The influences of intramolecular cyclization on the crosslinking reaction processes and the gel′s swelling ratio in polyvinyl alcohol (PVA)-glutaraldehyde(GA) system were studied. The results show that the intramolecular cyclization is a very important factor that has influence on the formation of PVA networks. The lower PVA concentration, the higher intramolecular cyclization degree and higher critical gelation mixing molecular molar ratio of CHO to OH(r_ c ) were obtained . The intramolecular cyclization fractions were increased with the decrease of PVA concentration. Equilibrium swelling ratio decreased with the increase of PVA concentration at the same extent of reaction and the increase of crosslinker concentration at the same PVA concentration. The formation of network can be adjusted with the change of the PVA concentration or the crosslinker concentration.
Amphiphilic alkyl (dodecyl and hexadecyl)-2-hydroxy-3-chloropropyl phosphates (C 12 - and C 16 -AHCP) were synthesized, and then alkyl glycidyl phosphates (C 12 - and C 16 -AGP) were quantitatively obtained by the treatment of AHCP with NaOH in order to prepare a novel vesicle which has reactive and polymerizable epoxy group on its membrane surface. The bilayer vesicles were formed by ultrasonication of aqueous dispersion of C 16 -AHCP or C 16 -AGP, but the vesicles composed of C 12 -AHCP and C 12 -AGP were not obtained by the same treatment. Both of C 16 -AHCP and C 16 -AGP bilayer vesicles are only stable at pH 5—10 or the ionic strength below 0.15. The gel-filtration chromatography and the UV-Vis absorption spectroscopic studies on Co(Ⅱ) tetrakis(propyloxycarbonyl)phthalocyanine as a lipophilic probe indicated that the phthalocyanine was effectively incorporated into the C 16 -AHCP bilayer membranes and predominantly present in a monomeric state in the membranes, which is much different from its leading diameric state in SDS micelle and ethanol.
