Morphological and Mechanical Aspects of the Micro Defects in Relation to Deterioration of Wood

与木材劣化相关的微观缺陷的形态和力学方面

• 批准号: 01560187
• 负责人: FURUKAWA Ikuo
• 金额: $ 1.41万
• 依托单位: Tottori University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01560187/
• 关键词: Solid wood; Micro defect; Deterioration; Slip plane; Wood rot fungi; Chitosan; Morphology; Mechanical properties; 木材(ブナ); 生物劣化; COV(Coriolus versicolor); SEL(Serpula lacrymans); カビ類; 腐朽形態; 強度的性質; 細胞壁; 光学顕微鏡; 形態計測; 微小欠陥部

The purpose of this study is to clarify the morphological features of the slip planes and the incipient decay portion within the cell walls, and to evaluate the influence of their micro defects on mechanical properties of solid wood.The slip planes within cell walls were closely related to mechanical deterioration of wood. The presence of slip planes drastically decreased strength and toughness of solid wood. At the low precompression level, the slip planes distributed randomly and thinly. The slip planes tend to concentrate at the compression failure zones, as the precompression stress level increased. Final breakage of the precompression wood occurred at the compression failure zone, and the cracks always propagated through the slip-plane site.The cells walls were seriously decayed by the wood-rot fungi and bacteria. The chitosan-coated wood showed high resistance to decay by the fungi, and remarkable anti-fungal effect was recognized for COV and SEL. The chitosan-coated cell-wall showed no evidence of enzymatic degradation and adherence of fungus on the surface of the cell wall.

本研究的目的是阐明细胞壁内滑移面和初期腐朽部分的形态特征，并评价其微观缺陷对实木力学性能的影响，细胞壁内滑移面与木材的力学劣化密切相关。滑移面的存在大大降低了实木的强度和韧性。在低预压水平下，滑移面呈随机稀疏分布。随着预压应力水平的增加，滑移面趋于集中在压缩破坏区。预压后木材的最终破坏发生在压缩破坏区，裂纹总是通过滑移面部位扩展，细胞壁被木腐菌和细菌严重腐蚀。结果表明，壳聚糖涂层木材具有较强的抗真菌性，对COV和SEL有显著的抑制作用，且未发现真菌的酶降解和粘附现象。

项目成果

古川郁夫・山本進: "甲殻類チキン質を用いた木材の改質 キトサン処理木材の防腐効力の評価" 鳥取大学演習林研究報告. No.19. (1990)

Ikuo Furukawa 和 Susumu Yamamoto：“使用甲壳类鸡肉材料的木材改性和壳聚糖处理木材的防腐功效评估”鸟取大学研究森林研究报告第 19 号（1990 年）。

古川郁夫: "キトサン処理木材の木材腐朽菌に対する耐朽性" 木材保存. (1990)

Ikuo Furukawa：“经壳聚糖处理的木材对木材腐烂真菌的抵抗力”木材防腐（1990）。

石原 肇・古川 郁夫・作野 友康・岸本 潤: "キトサン処理木材の微生物による材質変化(1)" 第39回日本木材学会大会研究発表要旨. 111 (1989)

Hajime Ishihara、Ikuo Furukawa、Tomoyasu Sakuno、Jun Kishimoto：“壳聚糖处理木材中微生物引起的材料变化 (1)” 日本木材学会第 39 届年会研究报告摘要 111 (1989)。

古川 郁夫・石原 肇・中下 典昭: "キトサン塗布処理材の木材腐朽菌に対する耐朽性について" 木材保存. 16(5). 245-252 (1990)

Ikuo Furukawa、Hajime Ishihara、Noriaki Nakashita：“关于壳聚糖涂层木材对木材腐烂真菌的抵抗力”《木材防腐》16(5)。

I. FURUKAWA, H. ISHIHARA and N. NAKASHITA: "Decay resistance of chitosan-coated woods against wood decaying fungi" Wood Preservation. 16(5). 245-252 (1990)

I. FURUKAWA、H. ISHIHARA 和 N. NAKASHITA：“壳聚糖涂层木材对木材腐烂真菌的抗腐性”木材防腐。