Prediction model based on chemical composition change for the mechanical degradation of Korean pine (Pinus koraiensis) after brown-rot fungi (Gloeophyllum trabeum) invasion
Prediction model based on chemical composition change for the mechanical degradation of Korean pine (Pinus koraiensis) after brown-rot fungi (Gloeophyllum trabeum) invasion
复制标题
基于化学成分变化的褐腐真菌（Gloeophyllum trabeum）入侵后红松（Pinus koraiensis）机械降解的预测模型
DOI：
10.1515/hf-2021-0082
复制
发表时间：
2021-11
期刊：
影响因子：
2.4
通讯作者：
Xingxia Ma
中科院分区：
文献类型：
--
作者：
Lipeng Zhang;Qifang Xie;Liujie Yang;Yajie Wu;Xingxia Ma
为了根据化学成分变化预测红松遭受褐腐后力学性能的变化，制备了252个样本，并使用褐腐真菌密粘褶菌进行了为期14周的实验室加速腐朽试验。对质量损失、顺纹抗压强度、顺纹抗拉强度和抗弯强度进行了测试。然后每两周进行一次化学成分分析和扫描电子显微镜观察。结果表明，样本的质量损失率随着腐朽时间的增加而增加，且与样本体积呈负相关。强度损失率与腐朽时间和质量损失率呈正相关。14周后，顺纹抗压、抗拉和抗弯样本的平均强度损失率分别达到32%、41%和41%。发现强度退化对纤维素和半纤维素含量的变化敏感。此外，基于纤维素和半纤维素含量的变化提出了数学回归模型，以定量预测红松遭受褐腐后强度的退化。
In order to predict the mechanical properties of Korean pine after brown-rot decay based on its chemical composition change, 252 samples were prepared and exposed to a 14-week accelerated laboratory decay test using the brown-rot fungus Gloeophyllum trabeum. The mass loss, parallel-to-grain compressive strength, parallel-to-grain tensile strength and bending strengths were tested. Then chemical components and scanning electron micrograph analysis were conducted every two weeks. Results indicated that the mass loss rates of the samples increased with the increasing decay time and were negatively correlated with the sample volume. The strength loss rates were positively correlated with the decay time and mass loss rates. After 14weeks the average strength loss rates of the parallel-to-grain compressive, tensile and bending samples reached 32%, 41% and 41%, respectively. Strengths degradation was found sensitive to the change of cellulose and hemicellulose contents. Further, mathematical regression models were proposed based on the content changes of the cellulose and hemicellulose to quantitatively predict the degradation of the strengths of Korean pine after brown-rot decay.
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