Article
Materials Science, Paper & Wood
Yizhong Cao, Chuhang Xu, Shuwei Xu, Haili Chen, Yutao Yan, Yifan Chen, Qiang Wu, Siqun Wang
Summary: The mechanical performance of wood-phenol formaldehyde (PF) adhesive interphase is significantly reduced after freeze-thaw cycles (FTCs), mainly due to cracks and weakened cell walls in the wood-PF interphase. The FTCs disrupt the aggregations of cellulose macromolecules and decrease the structural integrity of the wood-PF interphase.
Article
Construction & Building Technology
Yizhong Cao, Chuhang Xu, Qijun Zhang, Chunde Jin, Siqun Wang, Qiang Wu
Summary: The rise of green high-rises has led to the need for improving the mechanical performance and durability of engineered wood-based composites. This study used nanoindentation analyses and finite element analysis to investigate the fracture behaviors and mechanical properties of microscale wood-adhesive interphases composed of different cell wall layers and phenol-formaldehyde adhesive. The results revealed evident cracks and bending in the microscale wood-adhesive interphase, which were caused by stress concentration at the interfacial interlock between the cell walls and adhesive.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Biomedical
Shinpei Takahashi, Jun Zhou, Wurihan, Naofumi Shimomura, Yu Kataoka, Chie Watanabe, Yo Shibata, Takahiro Funatsu, Ping Gao, Takashi Miyazaki
Summary: The study found that 4-MET is a better co-monomer than HEMA in MDP-based dental adhesives to enhance chemical bonding properties while maintaining interface rigidity. Modulus mapping and nanoindentation can be used to evaluate the performance of the adhesive-dentin interface.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Zhenrui Li, Shimin Chu, Yu Zhang, Lanying Lin, Xing'e Liu
Summary: This study aimed to evaluate the influence of adhesive distribution with different variables on the transforming interface properties. The results showed that the physiochemical structure and micromechanics performance were significantly affected by adhesive types, grain directions, or wood cells. The improvement in mechanical properties could be attributed to chemical fixing and physical filling, which helped avoid stress concentration and protect the cell walls.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Boxiang Zhan, Long Zhang, Yongqi Deng, Lifeng Yan
Summary: A preparation method for a lignin-based composite adhesive was presented in this paper. The adhesive showed excellent performance, including high adhesive strength, good flame retardance, and outstanding thermal insulation and photothermal properties. It can also be used to process wood chips into regenerated wood.
Article
Engineering, Chemical
Babureddy Ramachandrareddy, Hendrikus W. G. van Herwijnen, Greeley Beck, Ronny Bredesen, Johannes Konnerth
Summary: According to Eurocode/ European standard, the design of timber structures and wood-based panels for different expected uses is divided into various service classes, taking into account the moisture ranges that may be encountered. It has been observed that the moisture content in the adherend significantly affects the bond lines of wood-adhesive joints. In this study, nanoindentation was used to investigate the influence of moisture on the mechanical properties of commonly used wood adhesive systems. The results showed that different adhesive systems exhibited varying degrees of stability under different relative humidity levels.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2022)
Article
Forestry
Dong Xing, Xinzhou Wang, Siqun Wang
Summary: The effects of temperature-dependent quasi-static mechanical properties and creep deformation of heat-treated wood were studied using Berkovich depth-sensing indentation. High temperature heat treatment improved wood cell wall hardness and reduced creep rate. The Burgers model was found to be well suited for studying creep behavior of heat-treated wood cell walls at different temperatures.
Article
Engineering, Mechanical
Jianli Zhou, Dongfeng Li, Jin Zhang, Zheng Zhong
Summary: The study investigates the interphase mechanical behaviors of the nickel/yttria-stabilized zirconia (Ni/YSZ) system, serving as an anode material in solid oxide fuel cells, using nanoindentation experiments and molecular dynamics simulations. The results show that the interface effect enhances the Young's modulus and hardness of Ni near the Ni/YSZ interface, while reducing these properties in YSZ near the interface. The MD simulations explain these effects by considering the different transport capabilities of deformations generated in Ni and YSZ across the interface. Based on the simulation results, models are proposed to predict the interphase hardness and Young's modulus of the Ni/YSZ system.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Physical
Tao Liang, Qing Yu, Ziliang Yin, Songyi Chen, Ye Liu, Yanping Yang, Hongbo Lou, Baolong Shen, Zhidan Zeng, Qiaoshi Zeng
Summary: This study investigates the spatial resolution of nanoindentation mapping on metallic glasses (MGs) using a Berkovich indenter. The results show that a maximum spatial resolution of approximately 200 nm can be achieved with a normalized indentation spacing of 10. These findings are important for the study of heterogeneity in MGs using nanoindentation.
Article
Materials Science, Paper & Wood
Yizhong Cao, Chuhang Xu, Shuwei Xu, Haili Chen, Yujing Nie, Yutao Yan, Yifan Chen, Qiang Wu
Summary: This study investigated the effects of alternating UV irradiation on engineered wood products. The results showed that UV irradiation activated the phenol ring in lignin and phenol formaldehyde adhesive, resulting in the generation of reactive oxygen species and triggering the oxidation and degradation of wood.
WOOD MATERIAL SCIENCE & ENGINEERING
(2023)
Article
Construction & Building Technology
Chunlei Dong, Shang Zhang, Jie Wang, Ying Hei Chui
Summary: Furfurylation treatment of wood can effectively reduce creep deformation, and furfurylated wood exhibits different creep performance compared to untreated wood in various stress levels and relative humidity environments.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yonghui Zhou, David Hui, Yuxuan Wang, Mizi Fan
Summary: This article presents the assessment of mechanical properties of rubber-wood-plastic composites (RubWPC) and their correlations. The results showed that the composites treated with multiple coupling agents exhibited superior interfacial bonding quality and nanomechanical property.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Materials Science, Composites
Zhaozhe Yang, Jian Chen, Xun Zhan, Guomin Wu, Zhenwu Kong
Summary: A novel green and high-strength wood fiber/waterborne epoxy resin composite with high fiber content, low-cost, and simple processing was developed. The composite exhibited superior mechanical properties and thermal performance compared to traditional composites, and showed significant potential in various applications.
POLYMER COMPOSITES
(2023)
Article
Environmental Sciences
Carine Setter, Uasmim Lira Zidanes, Eduardo Helio de Novais Miranda, Flavia Maria Silva Brito, Lourival Marin Mendes, Jose Benedito Guimaraes Junior
Summary: The study aimed to develop multilayer plywood with two forest species and two types of adhesive, evaluating their influence on physical and mechanical properties. Results showed that forest species had a greater impact on plywood properties, with panel density positively affecting mechanical properties and negatively impacting water absorption.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Multidisciplinary Sciences
Pierre Kibleur, Benjamin Blykers, Matthieu N. Boone, Luc Van Hoorebeke, Joris Van Acker, Jan Van den Bulcke
Summary: The use of dual-energy X-ray CT (DECT) combined with elemental mapping enables the 3D identification of doped resin inside wood fiberboards, guiding efforts to improve the durability of wood-based panels.
SCIENTIFIC REPORTS
(2022)