Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 522-528 |
| Journal | Holzforschung |
| Volume | 56 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2002 |
| MoE publication type | A1 Journal article-refereed |
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Structure of thermally modified wood studied by liquid state NMR measurements. / Hietala, Sami; Maunu, Sirkka Liisa; Sundholm, Franciska; Jämsä, Saila; Viitaniemi, Pertti.
In: Holzforschung, Vol. 56, No. 5, 2002, p. 522-528.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Structure of thermally modified wood studied by liquid state NMR measurements
AU - Hietala, Sami
AU - Maunu, Sirkka Liisa
AU - Sundholm, Franciska
AU - Jämsä, Saila
AU - Viitaniemi, Pertti
PY - 2002
Y1 - 2002
N2 - Thermal modification is a technique to produce wood with increased dimensional stability and lower equilibrium moisture content. 2H NMR relaxation measurements and pulsed field gradient (PFG-NMR) methods are non-invasive spectroscopic techniques that can be used to measure the response of liquid confined in porous materials and yield information on the size and distribution of the pores. These methods were used to study the structure and changes in structure of thermally modified Scots pine wood. The 2H longitudinal relaxation measurements of wood samples at different moisture contents showed different relaxation times and relaxation time distribution in the thermally treated samples. The effect of the thermal treatments on the cell size in wood samples was studied by PFG-NMR measurements with different dwell times. The PFG-NMR measurements showed no clear change in the cell dimensions of the thermally modified samples compared with control samples taken from the same log.
AB - Thermal modification is a technique to produce wood with increased dimensional stability and lower equilibrium moisture content. 2H NMR relaxation measurements and pulsed field gradient (PFG-NMR) methods are non-invasive spectroscopic techniques that can be used to measure the response of liquid confined in porous materials and yield information on the size and distribution of the pores. These methods were used to study the structure and changes in structure of thermally modified Scots pine wood. The 2H longitudinal relaxation measurements of wood samples at different moisture contents showed different relaxation times and relaxation time distribution in the thermally treated samples. The effect of the thermal treatments on the cell size in wood samples was studied by PFG-NMR measurements with different dwell times. The PFG-NMR measurements showed no clear change in the cell dimensions of the thermally modified samples compared with control samples taken from the same log.
U2 - 10.1515/HF.2002.080
DO - 10.1515/HF.2002.080
M3 - Article
VL - 56
SP - 522
EP - 528
JO - Holzforschung
JF - Holzforschung
SN - 0018-3830
IS - 5
ER -