.png){kind=icon}
.png){kind=icon}
Return
Effect of kraft and organosolv lignin on cross-linked poly(vinyl alcohol)/chitosan-based membranes for energy applications
.png){kind=icon}
PRE
AI
M
H
J
A
DOI：10.1007/s00289-026-06616-x.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Poly(vinyl alcohol)/chitosan (PVA/CS) composite membranes containing 20 wt%CS glycerol were prepared by solvent casting and cross-linked with 30 wt%PVA sulfosuccinic acid (SSA) via hot pressing. This study investigates the combined effects of the addition of 5 wt%CS kraft lignin (KL) or organosolv lignin (OL) and thermal cross-linking conditions (110 °C for 2 h or 120 °C for 3 h, at 25 kg·cm−2) on the physicochemical and ion transport properties of the membranes. Although lignin is more hydrophobic than the PVA/CS blend, the incorporation of KL or OL disrupts the hydrogen-bonding network, leading to a less cohesive polymer structure and increased water uptake. Nevertheless, when the membrane undergoes cross-linking, lignin particles actively participate in forming a compact network that favours SSA retention, leading to higher gel content and enhanced resistance to swelling, thermal decomposition, and proton-transport-induced degradation, particularly under more severe conditions. In particular, the systems containing KL exhibit greater consumption of hydroxyl groups during cross-linking and a higher incorporation of sulfonic acid groups, thereby enhancing proton diffusion and proton conductivity. These findings demonstrate that integrating lignin coupled with a controlled thermal cross-linking is an effective strategy for tailoring PVA/CS composites for energy-related applications.
Keywords:
Poly(vinyl alcohol) (PVA)
Chitosan (CS)
Lignin
Cross-linking
Composites
Sulfosuccinic acid (SSA)
Journal
IF:
4
Papers:
8.5K
Citations:
1.5W
Organization
Cited Papers