Time-domain NMR study of the drying of hemicellulose extracted aspen (Populus tremuloides Michx.)

被引：21

作者：

Elder, Thomas ^{[1
]}

Houtman, Carl ^{[2
]}

机构：

[1] US Forest Serv, USDA, Southern Res Stn, Pineville, LA USA

[2] US Forest Serv, USDA, Forest Prod Lab, Madison, WI USA

来源：

HOLZFORSCHUNG | 2013年 / 67卷 / 04期

关键词：

aspen; moisture content; nuclear magnetic resonance (NMR); pretreatment; FURFURYLATED NORWAY SPRUCE; HOT-WATER EXTRACTION; ENZYMATIC-HYDROLYSIS; MAGNETIC-RESONANCE; MOISTURE-CONTENT; MODIFIED WOOD; ACID; FERMENTATION; PRETREATMENT; H-1-NMR;

D O I：

10.1515/hf-2012-0130

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The effect of hot water on aspen chips has been evaluated using time-domain low-field nuclear magnetic resonance (NMR) spectroscopy. At moisture contents above fiber saturation point, treated chips exhibit relaxation times of free water longer than for the control. This is consistent with the removal of hemicelluloses given the hydrophilicity of these polysaccharides. The rate of decrease in free water upon drying is greater for the pretreated samples. These results indicate that hot water treatment modifies both the chemical and physical properties of the chips and may therefore impact product manufacture and performance.

引用

页码：405 / 411

页数：7

共 26 条

[1] EFFECTS OF DIFFUSION ON FREE PRECESSION IN NUCLEAR MAGNETIC RESONANCE EXPERIMENTS [J].

CARR, HY ;

PURCELL, EM .

PHYSICAL REVIEW, 1954, 94 (03) :630-638

[2] A rapid modified method for compositional carbohydrate analysis of lignocellulosics by high pH anion-exchange chromatography with pulsed amperometric detection (HPAEC/PAD) [J].

Davis, MW .

JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 1998, 18 (02) :235-252

[3] A multinuclear magnetic resonance imaging (MRI) study of wood with adsorbed water: Estimating bound water concentration and local wood density [J].

Dvinskikh, Sergey V. ;

Henriksson, Marielle ;

Berglund, Lars A. ;

Furo, Istvan .

HOLZFORSCHUNG, 2011, 65 (01) :103-107

[4] Time domain-nuclear magnetic resonance study of chars from southern hardwoods [J].

Elder, Thomas ;

Labbe, Nicole ;

Harper, David ;

Rials, Timothy .

BIOMASS & BIOENERGY, 2006, 30 (10) :855-862

[5] Cellulose-water interactions during enzymatic hydrolysis as studied by time domain NMR [J].

Felby, Claus ;

Thygesen, Lisbeth G. ;

Kristensen, Jan B. ;

Jorgensen, Henning ;

Elder, Thomas .

CELLULOSE, 2008, 15 (05) :703-710

[6] Structure of thermally modified wood studied by liquid state NMR measurements [J].

Hietala, S ;

Maunu, SL ;

Sundholm, F ;

Jämsä, S ;

Viitaniemi, P .

HOLZFORSCHUNG, 2002, 56 (05) :522-528

[7] A larch based biorefinery: pre-extraction and extract fermentation to lactic acid [J].

Horhammer, Hanna ;

Walton, Sara ;

van Heiningen, Adriaan .

HOLZFORSCHUNG, 2011, 65 (04) :491-496

[8] Effects of decreasing carbohydrate content on properties of wood strands [J].

Hosseinaei, Omid ;

Wang, Siqun ;

Rials, Timothy G. ;

Xing, Cheng ;

Zhang, Yang .

CELLULOSE, 2011, 18 (03) :841-850

[9] Pilot trials of hemicelluloses extraction prior to thermomechanical pulp production: Part 1 [J].

Houtman, Carl ;

Horn, Eric .

TAPPI JOURNAL, 2011, 10 (05) :21-28

[10] Effect of Thermal Modification on Wood Cell Structures Observed by Pulsed-Field-Gradient Stimulated-Echo NMR [J].

Kekkonen, Paivi M. ;

Telkki, Ville-Veikko ;

Jokisaari, Jukka .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (43) :18693-18697

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