Article
Materials Science, Paper & Wood
Krishna Prasad Kandel, Menuka Adhikari, Madhav Kharel, Girja Mani Aryal, Shiva Pandeya, Mahesh Kumar Joshi, Bipeen Dahal, Bhoj Gautam, Bhanu Bhakta Neupane
Summary: In this research, alkali was extracted from wood ash and used to process lignocellulose fiber obtained from Sterculia villosa. The findings showed that the fiber treated with wood-ash alkali had similar mechanical strength to the fiber treated with sodium hydroxide, indicating that wood-ash alkali treatment could be a low-cost method for processing lignocellulose biomass.
Article
Engineering, Civil
Fabrizia Cilento, Daniele Losanno, Luigi Piga
Summary: Classical rubber seismic isolators reinforced with steel shims are rarely used for housing buildings due to their large size, heavy weight, and high cost. In recent years, fiber reinforced elastomeric isolators (FREIs) have been investigated as a promising alternative. This study designed and manufactured novel reclaimed-rubber FREIs reinforced with low cost fabrics, showing promising performance and providing a technical basis for the development of low-cost and environmentally friendly seismic isolators for housing buildings.
Review
Forestry
Duy Linh Nguyen, Jan Luedtke, Martin Nopens, Andreas Krause
Summary: This article presents and discusses the available studies on utilization of waste wood (WW) resource for wood-based panel production. The majority of WW research was from Europe and focused on recycled material from particleboard. Particleboard was identified as the primary option for wood-based panel production using waste wood. There was a lack of research on recycling plywood. Physical and chemical contaminants varied depending on the origin of the recycled wood, and the properties of wood-based panels decreased with higher proportions of waste wood content.
EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS
(2023)
Article
Construction & Building Technology
Peifeng Su, Qingli Dai, Miaomiao Li, Yunxiang Ma, Jiaqing Wang
Summary: In this study, plastic-rubber compound modified mortar (PRM) and recycled steel fiber (RSF)-reinforced plastic-rubber modified mortar (PRSRM) samples were prepared and tested to evaluate their mechanical properties and drying shrinkage. The results showed that the addition of RSF increased the compressive strength of the mortar, while the PR improved its flexural behavior and reduced drying shrinkage length change. This sustainable material design promotes the full recycling of waste tires in cement-based materials.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
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
Forestry
Emre Birinci, Alperen Kaymakci
Summary: The aim of this study is to investigate the effects of processing technology, nanomaterials, and coupling agents ratio on the properties of wood-polymer nanocomposites. Extrusion and dry blending methods were used to prepare samples with wood flour, MAPP, ZnO nanoparticles, and polypropylene. The mechanical properties of the nanocomposites were significantly improved with the addition of ZnO and MAPP. The extrusion method resulted in better mechanical results due to the more homogeneous structure of the nanocomposites. The thermal stability of the nanocomposites improved with the addition of ZnO and MAPP. The storage and loss modulus values indicate that the processing technology is a key factor in the resistance of the nanocomposite materials.
Article
Chemistry, Physical
Qiang Su, Jin-Ming Xu, Yong-Dong Wang
Summary: Orthogonal experiments were conducted to study hybrid fiber rubber concrete (HFRC) and compared its mechanical properties with ordinary concrete. The study found that basalt fiber had the strongest influence on the strength of HFRC, and the combination of different fibers could significantly improve its strength. However, an increase in rubber volume ratio led to a gradual decrease in strength. The toughening and cracking resistance mechanism of fiber in HFRC was analyzed using SEM and EDS, and the strength of HFRC was predicted through a model.
Article
Construction & Building Technology
Sarun Muntongkaw, Sompratthana Pianklang, Nuchnapa Tangboriboon
Summary: By adding Typha angustifolia fiber and natural rubber-latex compound, the physical, thermal, and mechanical properties of gypsum ceiling composites can be enhanced, making them suitable for thermal insulation and construction decorative materials.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Computer Science, Information Systems
Seongyong Hur, David Kim, Chaehyun Lee, Dongil Choi
Summary: With the growth of the robotics industry, there is increasing demand for reducers that provide efficient torque increase while reducing motor speed. Compound planetary reducers are effective in robots as they offer high gear ratios in a smaller volume. Conventional reducers are designed by determining gear dimensions and calculating efficiency through dynamic analysis, resulting in time-consuming repeated designing and analysis. This study proposes an optimization approach using the Sequential Least Squares Programming (SLSQP) method to obtain results quickly. The SLSQP method is suitable for compound planetary friction reducers as it provides optimization results as real numbers with no constraints on gear dimension selection.
Article
Polymer Science
Charles Darko
Summary: This study reveals that an increase in oil amounts in EPDM compounds leads to a decrease in crosslink density and storage modulus, while increasing the elongation at break after tensile testing. Furthermore, compounds with high oil amounts release oil particles when dissolved in toluene solutions, resulting in increased swell ratios.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Chemistry, Physical
Hailong Xu, Yang Yang, Lifen Li, Baoyu Liu, Xiubo Fu, Xiaohui Yang, Yan Cao
Summary: This study investigated the influence of fiber particle size on the mechanical properties of a wood-plastic composite (WPC). Different sizes of wood fibers were used to reinforce high-density polyethylene (HDPE), either separately or in combination. The results showed that the smallest fiber size resulted in the lowest flexural and tensile properties, but the highest impact strength. Using a blend of fiber sizes led to improved mechanical properties, with composites containing a mix of 20-40 mesh and 40-80 mesh fibers exhibiting the best flexural and tensile performance.
Article
Polymer Science
Yulia Tertyshnaya, Svetlana Karpova, Maksim Moskovskiy, Aleksey Dorokhov
Summary: The study found that the addition of NR content results in an increase in the average fiber diameter, while the linear and surface densities show slight changes. Thermal characteristics analysis revealed that the glass transition temperature of PLA increased by 2-5 degrees C, and the melting temperature increased by 2-4 degrees C in the presence of natural rubber. Additionally, the elongation at break value increased by 3.5 times compared to pure PLA when NR content was 15 wt.%.
Article
Construction & Building Technology
Hui Lin, Hui Liu, Yue Li, Xiangming Kong
Summary: This paper investigates the use of wood fiber as a reinforcing material to improve the toughness of silicoaluminophosphate geopolymer. The results show that the incorporation of wood fiber effectively reduces brittleness and increases fracture toughness. However, the addition of wood fiber negatively impacts the setting and hardening behavior, reaction degree, and compressive strength of silicoaluminophosphate geopolymer.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Materials Science, Composites
Fanghui Wang, Huan Wang, Zhongying Wang, Dexin Liu, Jing Li
Summary: Polyaniline and polyaniline-silica composites synthesized using chemical oxidation polymerization were studied for their effect on the mechanical properties of hydrogenated nitrile rubber. The results showed that filling the polyaniline-silica composites into the rubber improved the dispersion of silica and enhanced the mechanical properties of the rubber.
POLYMER COMPOSITES
(2022)
Article
Crystallography
Yushan Liu, Jianyong Pang, Qiaoqiao Chen, Weijing Yao
Summary: This study investigated the hybrid-fiber reinforced rubber concrete to reduce brittle failure in high-stress soft rock roadways. It found that rubber particle content, fiber type and content significantly impact the concrete's performance, and optimizing the mix proportions can lower the probability of brittle failure in support structures.
