The bridging conformations of double-end anchored polymer-surfactants destabilize a hydrogel of lipid membranes
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چکیده
Double-end-anchored poly-ethylene-glycol-surfactants ~DEA-PEG-surfactants! induce the gelation of lyotropic lamellar La phases stabilized by undulation forces. The physical hydrogel (La ,g) derives its viscoelasticity from the proliferation of defects at a mesoscopic level. The DEA-PEG-surfactants assume both looping and bridging conformations. The existence of novel bridging conformations is indicated by the coexistence of two lamellar phases and the limited swelling of the La and La ,g phases. Modeling of the polymer decorated membranes demonstrates the existence of bridging and yields a rapidly decreasing density of bridging conformations with increasing interlayer spacing. © 2001 American Institute of Physics. @DOI: 10.1063/1.1399061#
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تاریخ انتشار 2001