Layer-by-Layer Self-Assembled Films of a Lignin-based Polymer through Hydrogen Bonding

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.

Tuning Mechanical Properties of Biobased Polymers by Supramolecular Chain Entanglement

“…M e is very high for polymers with bulky side groups from biomass such as soybean oil (>200 kDa), rosin acids (>90 kDa), and terpenes (>30 kDa). − A few strategies have been developed to overcome high M e : (1) the use of ultrahigh molecular weight polymers, (2) utilization of chain architectures such as block copolymers to allow for stress dissipation, ,− and (3) incorporation of physical or dynamic chemical cross-linking to induce chain entanglement. − Dynamic cross-linking is a viable approach with the aid of a wide variety of chemistries such as supramolecular interactions and exchangeable bonding. Supramolecular interactions such as hydrogen bonding (H-bonding) have been widely used as dynamic bonds to improve properties of polymers. − …”

Cephalopods Inspired Rapid Self-Healing Nanoclay Composite Coatings with Oxygen Barrier and Super-Bubble-Phobic Properties

“…LbL self-assembly is a powerful approach to the preparation of polymeric thin coatings, and the advantage is the ability to control coating thickness ranging from nano-to microscale and freely combine any substance, that can be dispersed in a solution, into the polyelectrolyte multilayer as an additive. 41,42 To understand the impact of MMT nanoclay, the number of bilayers was unified to 30-bilayer for all coatings, and the pH of each solution was unadjusted by additional acid/base. The actual coating thickness slightly varied depending on the concentration of MMT (Figure 2a).…”

UV-protection from chitosan derivatized lignin multilayer thin film

“…Other bio-based polyphenolic compounds, such as tannic acid and even sulfonated lignins, have demonstrated LbL growth via hydrogen bonds. [36][37][38] PDDA does not have either hydrogen bond donating or accepting sites, as it bears no functionality besides aliphatic carbons and quaternary ammonium groups. Since the PDDA/ lignin coating also grows layer-by-layer, it can be concluded that not all of the lm deposition is a result of hydrogen bonding.…”