WebJun 6, 2024 · Solid content and pH of the liquefied lignin-based PF resins varied in the range of 48.1–50.8% and 9.93–11.26, respectively, which were slightly lower than the values of a commercial PF resin (solid content was 51.4% and pH was around 11.3). In addition, it was observed that the LPF resins from the phenol-liquefied alkaline lignin had ... WebLignin extracted is optimum at the pH of 11 with lignin concentration of liquor of 1.85%. Other variables (ratio of volume of solvent to weight of solid, H2O2 concentration, temperature and time) were fixed at 9:1, 1.5, 100 oC for 3 h. The amount of silica extracted at different pH varied from 4315.0 ppm to 5022.4 ppm with an average of 4626.3
Lignin extraction and isolation methods - ScienceDirect
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Alkali lignin as a pH response bifunctional material with both ...
WebNov 17, 2024 · Lignin actually plays a two-fold role in cellulose degradation: as an oxidation catalyst (source of radicals) and as an anti-oxidant 26, 27. Recently, there has been … WebThe highest cohesive energy between the lignin nanofilms was measured in acidic conditions ( Wad = 1.96 ± 0.32 and 1.61 ± 0.38 mJ m −2 at pH 2.0 and 4.0, respectively), and this energy decreased as the pH increased ( Wad ∼ 0 mJ m −2 at both pH 7.0 and 10.0). WebNov 3, 2024 · Lignin modification was achieved by pH changes and pH-shifting. Cleavage of β-O-4 linkage was observed at pH 8.5 and pH 12, resulting in smaller particle sizes and … laverne howard