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  • Title: Deposition of pectin/poly-L-lysine multilayers with pectins of varying degrees of esterification.
    Author: Krzeminski A, Marudova M, Moffat J, Noel TR, Parker R, Wellner N, Ring SG.
    Journal: Biomacromolecules; 2006 Feb; 7(2):498-506. PubMed ID: 16471922.
    Abstract:
    The effect of pectin esterification on the assembly of multilayers consisting of poly-L-lysine (PLL) and pectin was studied using surface plasmon resonance (SPR), Fourier transform infrared-attenuated total reflection spectroscopy (FTIR-ATR), and a quartz crystal microbalance with dissipation monitoring (QCMD). With each layer deposited, there was a progressive increase in mass. The net charge of the multilayers was positive and increased with increasing degree of esterification of the pectin. Multilayer fabrication involved a limited fractionation of the pectin preparations, with the more highly esterified pectins having a weaker affinity for PLL. The multilayers were relatively hydrated structures with estimates of solids content in the range 10-32% w/w. The more highly esterified pectins had a tendency to form more hydrated structures, which showed a strong deswelling when PLL was added to a freshly deposited pectin layer.
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