Potential of Organosolv Lignin Based Materials in Pressure Sensitive Adhesive Applications

Abstract

Blending lignin with other polymers has long been utilized as a potent approach to explore novel applications for lignin. Yet, combinations of organosolv lignin (OSL) with superplasticizer have been hardly explored as a potential to design novel material properties. In this study, a commercial superplasticizer, a polycarboxylate polyether (PCE) is blended with a beech-based organosolv lignin, and their miscibility and adhesive properties are studied over the entire compositional range. All blend compositions exhibit a single glass transition temperature (T g) that follows the Kwei model of miscible polymer blends, while a thermal stabilization effect is evidenced in blends containing up to 50% lignin. Fourier transform infrared spectroscopy (FTIR) investigations reveal specific interactions between functional groups in PCE and lignin OH groups as molecular basis for miscibility. The rheological properties, tackiness, and adhesive peel strength suggest that these blends have potential as a base formulation for pressure sensitive adhesive applications, albeit needing some fine-tuning.

Environmentally sustainable, high-performance lignin-derived universal adhesive

“…The lower glass transition temperature of the lignin-based adhesive can support the crosslinking of lignin. 26 The functionalization or crosslinking of lignin to the lignin-based adhesive is also validated by thermogravimetric analysis (Fig. S1B †), as the crosslinked functionalities of the adhesive started to degrade at a lower temperature relative to those in lignin.…”

Mesoporous Manganese Oxide/Lignin-Derived Carbon for High Performance of Supercapacitor Electrodes

“…The absorption bands at wavenumbers 1710 cm −1 and 1620 cm −1 show a peak which indicates a stretching vibration of the unconjugated C=O and C=C frame of the benzene aromatic group [ 1 , 21 , 29 ]. The lignin constituent group is also shown to have bending properties at the 1518 cm −1 guacyl (G) component, aromatic rings at the G and S lignin units (1272–1263 cm −1 and 1330–1326 cm −1 ) [ 30 ], a C-O-C band center position (1025 cm −1 ) [ 31 ], and C-O-C vibrations that are influenced by the hydrogen band (1103 cm −1 ). In the FTIR spectrum of lignin, there is a syringyl (S) at 809 cm −1 .…”

Recent progress of biomass based self‐healing polymers

“…Lignin widely exists in nature, and it has become a new trend to introduce it into polymer materials 54–57 . So as to solve the problem of incompatibility with resin caused by lignin hyperbranched structure, lignin molecules are modified to improve the solubility of lignin.…”