Phenol-formaldehyde reactivity with lignin in the wood cell wall

Daniel J. Yelle; John Ralph

Treesearch

Phenol-formaldehyde reactivity with lignin in the wood cell wall

Informally Refereed

Authors:

Daniel J. Yelle, John Ralph

Year:

2016

Type:

Full Proceedings

Station:

Forest Products Laboratory

Source:

Proceedings of the International Conference on Polyphenols, July 11-15, 2016, Vienna, Austria. Ed.: Krebs, Heinz A. Publisher: Book-of-Abstracts.com. pp. 170-171.

Download (PDF 310 KB)

Download (PDF 310 KB): https://research.fs.usda.gov/download/treesearch/52911.pdf

Abstract

Latewood from Pinus taeda was reacted with alkaline phenol–formaldehyde (PF) adhesive and characterised using two-dimensional ¹H–¹³C solution-state nuclear magnetic resonance (NMR) spectroscopy so that chemical modification of the wood cell wall polymers, after PF resol curing, could be elucidated. The results showed depletion in native lignin linkages via alkaline hydrolysis along with confirmation of newly formed diarylmethanes (methylene bridges) between guaiacyl lignin units and phenolic methylols.

Keywords

Lignin, NMR, adhesives, phenol-formaldehyde

Citation

Yelle, Daniel J.; Ralph, John. 2016. Phenol-formaldehyde reactivity with lignin in the wood cell wall. In: Proceedings of the International Conference on Polyphenols; Krebs, Heinz A., Ed. 11-15 July 2016. Vienna, Austria. Ed.: Publisher: Book-of-Abstracts.com. pp. 170-171.