NDLI: Glass-Transition Temperature Profile Measured in a Wood Cell Wall Using Scanning Thermal Expansion Microscope (SThEM)

Content Provider	Springer Nature Link
Author	Antoniow, J. S. Maigret, J. E. Jensen, C. Trany, N. Chirtoc, M. Beaugrand, J.
Copyright Year	2012
Abstract	This study aims to assess the in situ spatial distribution of glass-transition temperatures (T $_{g}$) of the main lignocellulosic biopolymers of plant cell walls. Studies are conducted using scanning thermal expansion microscopy to analyze the cross-section of the cell wall of poplar. The surface topography is mapped over a range of probe-tip temperatures to capture the change of thermal expansion on the sample surface versus temperature. For different temperature values chosen between 20 °C and 250 °C, several quantitative mappings were made to show the spatial variation of the thermal expansion. As the glass transition affects the thermal expansion coefficient and elastic modulus considerably, the same data line of each topography image was extracted to identify specific thermal events in their topographic evolution as a function of temperature. In particular, it is shown that the thermal expansion of the contact surface is not uniform across the cell wall and a profile of the glass-transition temperature could thus be evidenced and quantified corresponding to the mobility of lignocellulosic polymers having a role in the organization of the cell wall structures.
Starting Page	2167
Ending Page	2172
Page Count	6
File Format	PDF
ISSN	0195928X
Journal	International Journal of Thermophysics
Volume Number	33
Issue Number	10-11
e-ISSN	15729567
Language	English
Publisher	Springer US
Publisher Date	2012-09-29
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biopolymers Cellulose Glass transition Hemicellulose Lignin Local glass temperature distribution Scanning thermal expansion microscopy Water content Condensed Matter Physics Mechanics Physical Chemistry Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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