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| Titel: |
The Role of Lignin in the Mechanical Permanence of Paper: Part II. Effect of Acid Groups |
| Auteur: |
Zou, X. Gurnagul, N. |
| Verschenen in: |
Journal of wood chemistry and technology |
| Paginering: | Jaargang 15 (1995) nr. 2 pagina's 247-262 |
| Jaar: |
1995-05-01 |
| Inhoud: |
The effect of sulphonic acid groups on the mechanical permanence of paper was studied by accelerated aging of thermomechanical pulp (TMP) that was sulphonated to different levels. Results showed that acid groups in the hydrogen form have a significant negative effect on the mechanical permanence of paper. However, neutralization of these groups by treatment with sodium hydroxide or calcium carbonate significantly improved the mechanical permanence of paper. Sulphonated mechanical pulp after washing with tap water has good mechanical permanence because the acid groups are mostly in the calcium form due to the ion exchange during washing. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 8 van 8 gevonden artikelen
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