The Effect of Fiber Surface Lignin on Interfiber Bonding
2006
Shao, Z. | Li, K.
It has been speculated in several studies that lignin would impair interfiber bonding when present on the fiber surface due to the hydrophobic nature of lignin. Several experiments were devised in the present study to compare the internal bond strength and specific bond strength of pulp fibers with different surface lignin concentrations. The pulp samples used included unbleached and fully bleached kraft pulp, CTMP pulp with different middle lamella coverage on the fibers, and fully bleached pulp with lignin adsorbed on the fiber surface. With all of the pulp samples used, the internal bond strength was reduced markedly when lignin was present on the fiber surface; but the relative bonded area was not affected significantly.
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