Abstract
A new type of layer-by-layer (LBL) self-assembled films of a lignin-based polymer (GCL1-JB) with Poly(4-vinylpyridine) (P4VP) has been obtained via hydrogen bonding interaction. Fourier-transform infrared spectroscopy results confirmed a strong hydrogen bonding between GCL1-JB and P4VP. And the hydrodynamic radius of the GCL1-JB/P4VP mixture was larger than individual polymer due to the hydrogen bonding. The adsorption characteristics of GCL1-JB self-assembled films based on hydrogen bonding or electrostatic interaction were investigated by UV–vis spectrophotometry and atomic force microscopy, respectively. Compared to the GCL1-JB self-assembled films based on electrostatic interaction, that based on hydrogen bonding has a larger adsorbed amount, a faster adsorption transfer rate from dipping solution to the substrate surface and a larger surface roughness. This study gives significant information to understand the adsorption characteristics of lignin-based polymers on the solid surface via different driving forces.
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