Multiscale wood micromechanics and size effects study via nanoindentation

Golovin, Yuri I.; Gusev, Alexander; Golovin, D. Yu.; Матвеев, С А; Tyrin, Alexander I.; Samodurov, A. A.; Коренков, В. В.; Vasyukova, I. A.; Yunaсk, Maria A.

doi:10.1016/j.jobab.2023.04.002

Cited by 7 publications

(1 citation statement)

References 41 publications

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“…Traditional furniture and architectural joints, like mortise and tenon, round dowel joints, metal connectors, and glue joints, while prevalent, face challenges like complex production processes, significant wood loss, metal corrosion, and low efficiency [16][17][18][19][20][21]. In order to solve these problems, wood welding technology, as an emerging environmentally friendly and efficient connection technology, has attracted the attention of researchers and industry [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effects of Dowel Rotation Welding Conditions on Connection Performance for Chinese Fir Dimension Lumbers

Zhong,

Li,

et al. 2024

Forests

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In this study, the rotating welding process of Chinese fir (Keteleeriafortunei) in Guizhou, China, was systematically analyzed. The effects of rotating welding conditions, including the dowel-to-guide hole diameter ratio, welding time, depth, base surface, angle, and dowel type, on the performance of welded Chinese fir were explored. Moreover, the physical and chemical changes oftheChinese fir interface during welding were revealed by Fourier-Transform Infrared Spectroscopy (FT-IR), X-ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). The results indicated the following: (1) The rotating welding technology can quickly achieve a strong connection between wood through friction heat without chemical adhesives and compared with traditional wood connection technology such as gluing or mechanical fixing;it has the advantages of simple operation, high production efficiency; and environmental friendliness. (2) Aftertherotating welding, the wood underwent significant pyrolysis, especially the degradation of hemicellulose. The heat generated in the welding process caused good melting and mechanical interlocking between the dowel and the wall of the guide hole, but it was also accompanied by afriction loss of the dowel and the substrate. (3) The welding parameters affected the wood’s connection strength and stability by altering heat production, distribution, transfer, and frictional losses. The impact of the dowel-to-guide hole diameter ratio had a great influence on the connection strength. When the diameter ratio was 1:0.7, the tensile strength was the highest, reaching 2.27 MPa. (4) The analyses of XPS, FTIR, XRD, and SEM proved thatthechemical composition changes at the interface, leading to a more structured crystalline bond and enhanced connection strength due to fiber entanglement and interlocking. This research providesatheoretical and experimental basis forthefurther innovation and development of wood processing technology and provides a new technical path forthegreen manufacturing of wood structure buildings.

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Section: Introductionmentioning

confidence: 99%

Effects of Dowel Rotation Welding Conditions on Connection Performance for Chinese Fir Dimension Lumbers

Zhong,

Li,

et al. 2024

Forests

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Colorful Room‐Temperature Phosphorescence Including White Afterglow from Mechanical Robust Transparent Wood for Time Delay Lighting

Lü,

Gao,

Shi

et al. 2024

Small Structures

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The preparation of mechanical robust organic room‐temperature phosphorescence (RTP) materials especially with white afterglow is attractive but rarely reported. Herein, a method to produce mechanical robust colorful RTP transparent wood (PTW) by infiltrating delignified wood with poly (vinyl alcohol) solutions containing arylboronic acids with various π conjugations is reported. The doubly rigid environment provided by the B─O covalent bonds and hydrogen bonds can stabilize the triplet excitons, leading to a ultralong lifetime of up to 2.13 s and excellent RTP emission stability (without obviously quenching over a month) of the target PTW. Besides, as a promising structural material for optical applications, the PTW shows combined advantages of multicolored persistent luminescence (from blue to green and then to red), good optical transmittance (≈90%), and striking mechanical strength (≈154 MPa). More importantly, by introducing appropriate amount of fluorescent dye rhodamine 6 G to the PTW with blue afterglow, white afterglow with a lifetime of 1.85 s is successfully achieve through triplet‐to‐singlet Förster resonance energy transfer. The PTW can function as afterglow window, anticounterfeiting label, and time delay lighting. This success paves the way for the development of mechanical robust, ecofriendly, and practical RTP materials.

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Light-responsive multimode luminescence in photochromism transparent wood for anti-counterfeiting application

Yang,

Tian,

Duan

et al. 2024

Industrial Crops and Products

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Multiscale wood micromechanics and size effects study via nanoindentation

Cited by 7 publications

References 41 publications

Effects of Dowel Rotation Welding Conditions on Connection Performance for Chinese Fir Dimension Lumbers

Effects of Dowel Rotation Welding Conditions on Connection Performance for Chinese Fir Dimension Lumbers

Colorful Room‐Temperature Phosphorescence Including White Afterglow from Mechanical Robust Transparent Wood for Time Delay Lighting

Light-responsive multimode luminescence in photochromism transparent wood for anti-counterfeiting application

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