Location: Commodity Utilization ResearchTitle: Molecular level comparison of water extractives of maple and oak
|SLEIGHTER, RACHEL - Old Dominion University|
|HATCHER, PATRICK - Old Dominion University|
|LIU, SHASHA - Chinese Research Academy Of Environmental Sciences|
|WU, FENGCHANG - Chinese Research Academy Of Environmental Sciences|
|ZOU, HAIXUAN - University Of Maine|
Submitted to: Forest Products Society
Publication Type: Proceedings
Publication Acceptance Date: 5/30/2019
Publication Date: 6/25/2019
Citation: He, Z., Sleighter, R.L., Hatcher, P.G., Liu, S., Wu, F., Zou, H., Olanya, O.M. 2019. Molecular level comparison of water extractives of maple and oak. In: Proceedings of the 73rd Forest Products Society(FPS) International Convention, June 25-28, 2019, Atlanta, Georgia. 5 p.
Interpretive Summary: Wood extractives can change the wettability and the curing properties of wood adhesives, thus affecting the gluing bond strength and performance. Maple and oak are two wood substrates frequently used in wood adhesive studies. Increased knowledge on the water extractives of the two types of wood would be helpful in our understanding of their potential, thus improving the strategies of wood-adhesive bonding. In this work, the chemical composition of the water extractives was compared and characterized by ultraviolet/visible spectroscopy (UV/vis) and ultrahigh resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). Analysis of the resulting data indicated that both extractives mainly fell into the lignin- and carbohydrate-like compounds with minor tannin-like and lipid-like substances. In the meantime, some differences in chemical composition between the extractives of the two types of wood were observed. Nine of the 10 most abundant formulas (5 each wood) could be assigned specific bioactive chemical compounds related to tree and other plant biomass per literature comparison. Thus, data and observations in this work not only increase the knowledge of wood chemistry for exploration of bioactive chemicals in wood extractives, but also provide some information for further application FT-ICR MS for chemical markers useful in profiling and identification of wood types and sources.
Technical Abstract: Besides cellulose, hemicellulose, and lignin as the main structural components of cell walls, wood contains other non-structural substances known as extractives. Extractives in wood have crucial functions in protecting living trees from destructive pests and also contribute to wood color and fragrance. Some extractive components show specific biological activities with medical applications. The extractives also play important roles in wood processing and related applications. Wood extractives may be extracted by water and/or organic solvents. To increase our understanding and knowledge of water extractives, two types of wood, maple and oak, were extracted by water, in this research. The chemical composition of the water extractives were compared and characterized by ultraviolet/visible (UV/vis) spectroscopy and ultrahigh resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) using both negative and positive electrospray ionization modes. Preliminary analysis of the resulting data indicated that both extractives were mainly into the lignin- and carbohydrate-like compound categories, with some minor contributions from tannin-like and lipid-like substances. Other differences in the chemical composition between the extractives of the two wood types were observed. Information derived from this work increases the knowledge of wood chemistry for exploration of bioactive chemicals in wood extractives, and also provides the basis for further application FT-ICR MS for chemical markers with utility in profiling and identification of wood types and sources.