Abstract
The surfaces of pressure groundwood (PGW), thermomechanical pulp (TMP),
and chemithermomechanical pulp (CTMP) were studied by atomic force microscopy
(AFM), x-ray photoelectron spectroscopy (XPS), contact angle measurement,
and polyelectrolyte adsorption. The combination of these methods yielded a
comprehensive picture of the chemistry, adhesive properties and morphology of
the fiber surfaces and how they were affected by washing, peroxide bleaching,
dithionite bleaching, and ozone treatment. Overall, the fiber surfaces were
found to be very heterogeneous. Sulfite treatment in the production of CTMP
pulp, peroxide bleaching under alkaline conditions, and ozone treatment
modified especially the lignin and/or the pectins so that more acidic groups
were introduced into the pulps. The adhesion between water and fibers
increased when hydrophobic extractives (pitch) were removed by extraction
with dichloromethane.
| Original language | English |
|---|---|
| Title of host publication | Characterization of Lignocellulosic Materials |
| Publisher | Wiley-Blackwell |
| Chapter | 3 |
| Pages | 36-59 |
| ISBN (Electronic) | 978-1-4443-0542-5 |
| ISBN (Print) | 978-1-4051-5880-0 |
| DOIs | |
| Publication status | Published - 2008 |
| MoE publication type | A3 Part of a book or another research book |