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Penetration of poly(ethylene glycol) into wood cell walls of red pine
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Dragica Jeremic
Published/Copyright:
April 26, 2007
Abstract
Penetration of poly(ethylene glycol) (PEG) with a wide range of molecular weights into cell walls of red pine wood was investigated. The study included bulking measurements and visualization of diffusion of brominated PEG by scanning transmission electron microscopy coupled to an energy-dispersive X-ray analyzer (STEM-EDXA) and a time-of-flight secondary ion mass spectrometer (ToF-SIMS). Both bulking and visualization techniques were in agreement, showing that all molecular weights of the polymer (PEG 1000, PEG 8000, and PEG 20000) are capable of penetrating cell walls. ToF-SIMS was more sensitive than STEM-EDXA, allowing visualization of lower amounts of brominated PEG. A trend to higher concentrations of PEG in the middle lamellae was observed.
Keywords: bulking; cell wall; diffusion; molecular weight; MW; PEG; penetration; polyethylene glycol; scanning transmission electron microscopy; secondary ion mass spectrometry; STEM; time of flight; ToF-SIMS
Received: 2006-5-20
Accepted: 2007-3-7
Published Online: 2007-04-26
Published in Print: 2007-5-1
©2007 by Walter de Gruyter Berlin New York
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Keywords for this article
bulking;
cell wall;
diffusion;
molecular weight;
MW;
PEG;
penetration;
polyethylene glycol;
scanning transmission electron microscopy;
secondary ion mass spectrometry;
STEM;
time of flight;
ToF-SIMS
Articles in the same Issue
- To all readers, authors and subscribers
- Vapor-phase diethyl oxalate pretreatment of wood chips: Part 1. Energy savings and improved pulps
- Vapor-phase diethyl oxalate pretreatment of wood chips: Part 2. Release of hemicellulosic carbohydrates
- Size exclusion chromatographic and UV-VIS absorption analyses of unbleached and bleached softwood kraft pulps using LiCl/1,3-dimethyl-2-imidazolidinone as a solvent
- A new method for the titration of free phenolic groups in pulps
- Adsorption of water-soluble organic dyes on ferrofluid-modified sawdust
- Mechanical properties and creep behavior of lyocell fibers by nanoindentation and nano-tensile testing
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- Penetration of poly(ethylene glycol) into wood cell walls of red pine
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- Improved quantitative determination of benzalkonium chloride in treated wood by liquid chromatography
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