Novel Liquid extraction method for detecting Native-wood Formaldehyde
| dc.contributor.author | Tasooji, Mohammad | en |
| dc.contributor.committeechair | Frazier, Charles E. | en |
| dc.contributor.committeemember | Roman, Maren | en |
| dc.contributor.committeemember | Renneckar, Scott Harold | en |
| dc.contributor.department | Forest Resources and Environmental Conservation | en |
| dc.date.accessioned | 2016-11-29T07:00:13Z | en |
| dc.date.available | 2016-11-29T07:00:13Z | en |
| dc.date.issued | 2014-06-06 | en |
| dc.description.abstract | New vigorous regulations have been established for decreasing the allowable formaldehyde emissions from nonstructural wood based composites. Two main sources of formaldehyde emission in non-structural wood based composites are adhesive and wood. Adhesives are quite well known and great efforts have been conducted to decrease their formaldehyde content; however formaldehyde emission from wood has received little attention and it is not completely understood. Wood-borne formaldehyde emission exists in a complex equilibrium in wood matrix. The reaction between formaldehyde and wood hydroxyl groups/water can hinder the complete formaldehyde extraction. In order to have a complete formaldehyde extraction, a stronger nucleophile than hydroxyl and water groups is needed. In this study cross-linked poly (allylamine) (PAA) beads were synthesized and used as a strong nucleophile to extract all the biogenic and synthetic free-formaldehyde within the woody matrix of never-heated and heat-treated Virginia pines; the results were compared to simple water extraction. A new formaldehyde capturing device was also developed using a serum bottle. Results showed that there was no advantage of using PAA beads over simple water extraction for extracting woody matrix free-formaldehyde. This means that simple water extraction can extract all the free-formaldehyde from the woody matrix. It was also found that thermal treatment resulted in generating more wood-borne formaldehyde. The other important finding was the new developed formaldehyde capturing device. The device was very promising for detecting wood-borne formaldehyde from very small pieces of wood (5-70 mg) and can be very useful in future studies. | en |
| dc.description.degree | Master of Science | en |
| dc.format.medium | ETD | en |
| dc.identifier.other | vt_gsexam:3199 | en |
| dc.identifier.uri | http://hdl.handle.net/10919/73511 | en |
| dc.publisher | Virginia Tech | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject | Native-wood formaldehyde emission | en |
| dc.subject | liquid extraction | en |
| dc.subject | poly (allylamine) beads | en |
| dc.subject | water extraction | en |
| dc.title | Novel Liquid extraction method for detecting Native-wood Formaldehyde | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | Forest Products | en |
| thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
| thesis.degree.level | masters | en |
| thesis.degree.name | Master of Science | en |
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