摘要
为探究糠醇应用于饱水考古木材加固中的效果及机理,通过对糠醇加固考古木材的质量增加率(WPG)、色度、绝干干缩率、抗胀(缩)率(ASE)、平衡含水率进行分析,探究糠醇对饱水考古木材的加固效果;并通过扫描电子显微镜、荧光显微镜、傅里叶变换红外光谱,表征糠醇树脂在考古木材中的分布及糠醇加固考古木材的化学组分变化,探讨糠醇对饱水考古木材的加固机理。结果表明:糠醇进入考古木材胞壁内并固化形成糠醇树脂,糠醇树脂填充充胀细胞壁,阻碍了水分进入,糠醇得以加固饱水考古木材。当糠醇浸渍液的质量分数为50%时,加固后考古木材WPG达到最大值(269%),此时表面色差值为2.66,即无明显表面颜色变化。未加固考古木材及质量分数为10%,30%和50%的糠醇浸渍液加固考古木材的体积绝干干缩率分别为78.00%,4.23%,1.52%和1.43%,加固考古木材的ASE均为90%~100%。未加固考古木材及质量分数为10%,30%和50%的糠醇浸渍液加固考古木材,在环境相对湿度为84.20%时的水吸附量分别为13.27%,3.89%,4.08%和4.10%。糠醇加固考古木材的尺寸稳定性提高、吸湿性降低,且不同质量分数的糠醇浸渍液造成的差异较小。研究证明,糠醇加固饱水考古木材有效提高了尺寸稳定性并降低了吸湿性,是一种有效的饱水考古木材加固方法,为饱水考古木材保护与加固提供了一种新手段。
This study investigated the effects and mechanisms of furfuryl alcohol(FA)in reinforcing waterlogged archaeological wood by analyzing the weight percent gain(WPG),chromaticity,oven-dry shrinkage rate,antiswelling efficiency(ASE),and equilibrium moisture content of FA-treated archaeological wood.The reinforcement effects of FA on waterlogged archaeological wood were evaluated.Additionally,the distribution of FA resin within the wood and the chemical composition changes of the treated wood were analyzed using scanning electron microscopy,fluorescence microscopy,and Fourier-transform infrared spectroscopy.These analyses provided valuable insights into the mechanisms by which FA reinforces waterlogged archaeological wood.The results showed that FA successfully entered the wood and cured it to form a FA resin,which filled cell walls of the wood and blocked the entrance of water,so that FA was able to successfully strengthen the waterlogged archaeological wood.When the mass fraction of FA was 10%,the FA resin did not yet fully fill and swell the cell walls.However,when the mass fractions were 30%and 50%,the cell walls were more filled with FA resin,with minimal differences observed between these two groups of archaeological wood under electron microscopy.At the FA mass fraction of 50%,the absolute dry WPG of the impregnated archaeological wood reached the maximum value of 269%,and the surface color difference value was 2.66,i.e.,no obvious change in the surface color.Volumetric shrinkages of control and archaeological wood samples impregnated with 10%,30%and 50%FA solutions were 78.00%,4.23%,1.52%and 1.43%,respectively.The ASEs of the impregnated archaeological wood were all in the range of 90%to 100%.The water vapor adsorptions at 84.20%relative humidity were 13.27%,3.89%,4.08%and 4.10%for the control and archaeological wood samples impregnated with 10%,30%and 50%FA solutions,respectively.The dimensional stability and hygroscopicity of archaeological wood samples impregnated with FA solutions increased and decreased,respectively,and the differences caused by different FA mass fractions were small.This study verified that the FA impregnation of waterlogged archaeological wood effectively improved its dimensional stability and hygroscopicity,which can serve as a novel and effective method to preserve waterlogged archaeological wood.
作者
徐创
杨季雨
王新洲
冷魏祺
潘彪
XU Chuang;YANG Jiyu;WANG Xinzhou;LENG Weiqi;PAN Biao(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China;Zhejiang Fangyuan Test Group Co.Ltd.,Hangzhou 310018,China)
出处
《林业工程学报》
北大核心
2026年第1期53-62,共10页
Journal of Forestry Engineering
基金
国家自然科学基金(32001259)。
关键词
饱水考古木材
糠醇
加固
尺寸稳定性
吸湿性
waterlogged archaeological wood
furfuryl alcohol
reinforcement
dimensional stability
hygroscopicity
