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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Table 1 The characterization of technical lignins

From: Conversion of technical lignins to functional materials with retained polymeric properties

  Species Hydroxyl group Molecular weight References
Total Phenolic M w (×103) M n (×103) M w/M n
(mmol/g)a (mmol/g)a
Kraft lignin Softwood 6.5–8.6 2.7–3.5 1.1–45.7 0.5–7.7 2.2–13.4 [511]
  Hardwood 6.5–8.4 4.3–4.7 2.4–4.8 0.4–1.3 1.8–12.0 [5, 8, 12]
Lignosulfonate Softwood b 1.2–1.9 10.5–60.2 2.7–6.5 6.7–22.3 [6, 11, 13]
  Hardwood b 1.4–1.5 6.9–7.8 2.4–4.6 1.7–3.0 [11, 1315]
Ogranosolv lignin (ethanol) Softwood 6.3–10 2.7–3.1 2.9–5.4 1.8–3.1 1.6–1.8 [16, 17]
  Hardwood 5.7 2.8 2.0–2.6 1.3–1.6 1.5–1.6 [12, 17]
(Formic acid) Miscanthus 3.7–4.9 1.6–2.4 2.8 1.1 2.5 [6, 7, 18]
(Acetic acid) Hardwood 5.5–5.8 3.5–4.0 0.9 b b [19, 20]
(Acetic acid/formic acid) Wheat straw 3.4 1.0 2.2 1.6 1.3 [21]
  1. aSome data were modified unit from original references
  2. bNot available