Evaluating the Potential of Birch Bark Suberinic Acids for Solid Wood Impregnation  

作　　者：Daniela Godina Guntis Sosins Aigars Paze Janis Rizikovs Raimonds Makars Andreas Treu 

机构地区：[1]Latvian State Institute of Wood Chemistry,Biorefinery Laboratory,Riga,LV-1006,Latvia [2]Norwegian Institute of Bioeconomy Research,Department Wood Technology,Høgskoleveien 8,Ås,1433,Norway

出　　处：《Journal of Renewable Materials》2025年第1期147-161,共15页可再生材料杂志(英文)

基　　金：supported according to contract No.5.1.1.2.i.0/1/22/A/CFLA/007 between“Forest Sector Competence Centre of Latvia”Ltd.;the Central Finance and Contracting Agency which dated 20th January of 2023.

摘　　要：Instead of the traditional linear model of taking,making,and disposing,the circular bio-economy promotes a regenerative approach.Although there is potential to create valuable products like betulin,lupeol,and suberinic acids(SA)from outer birch bark,many industries,such as plywood and pulp,often choose to incinerate substan-tial amounts of leftover birch bark to meet their energy needs.This highlights the importance of obtaining valu-able products from wood.The objective of this study was to examine various fractions of SA and assess their potential for wood impregnation.The fractions included SA potassium salts in ethanol(SAK-EtOH)and water(SAK-H2O),SA suspension in water(SAS-H2O)and dried SA,which was subsequently diluted in ethanol(DSA-EtOH).There is significant potential for utilizing SA in wood treatment formulations as a sustainable alternative to harmful petroleum-derived chemicals.This approach not only addresses environmental concerns but also enhances the functionality of wood in construction applications,such as improving impregnation for moisture and fungal protection.Among the solutions tested,the ethanol solution of SA,specifically DSA-EtOH,showed the highest weight percent gain(WPG)and the greatest leaching resistance.GPC analysis showed that SA salts in ethanol(SAK-EtOH)and water(SAK-H2O)predominantly consist of low molecular fractions and each process(acidification and drying)reduces the low molecular content in the sample.This suggests that SA polymerizes after drying,making it necessary to dissolve it in ethanol to meet the requirements for impregnation.Further opti-mization,including adjustments in the concentration of the SA ethanol solution and the curing temperature,is essential to identify the optimal conditions for more in-depth impregnation studies.

关 键 词：Birch bark suberinic acids solid wood impregnation 

分 类 号：O62[理学—有机化学]