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The vascular bundle system in the nodal region is a net-like structure composed of horizontal and axial vascular bundles. This structure of bamboo nodes facilitates the tangential and axial transport of moisture and nutrients. The high resolution X-ray CT technologies can produce non-destructive, in situ images for bamboo nodes, thus realizing the visualization of the intricate internal structure of bamboos.

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  • Open Access

    ARTICLE

    Physical Properties of SiC Nanostructure for Optoelectronics Applications

    Mayyadah H. Mohsin1, Najwan H. Numan2, Evan T. Salim1,*, Makram A. Fakhri2,*
    Journal of Renewable Materials, Vol.9, No.9, pp. 1519-1530, 2021, DOI:10.32604/jrm.2021.015465
    (This article belongs to this Special Issue: Current Advances in Green Nanomaterials Applications)
    Abstract A SiC nanofilms have been deposited and investigated on quartz and silicon substrates using pulsed laser deposition technique with the 300 pulses of Nd: YAG laser at two different laser wavelengths of 1064 nm and 532 nm. The structural, morphological, and optical properties of the deposited nanostructure SiC were prepared and characterized as a function of the wavelengths of the used laser. The structural result shows four different pecks at (111), (200), (220), and (311) planes related to Nano SiC. The transmission result presents that the optical energy gap value for the SiC nanostructure is depended on the wavelength of… More >

    Graphic Abstract

    Physical Properties of SiC Nanostructure for Optoelectronics Applications

  • Open Access

    ARTICLE

    Visualizing Complex Anatomical Structure in Bamboo Nodes Based on X-ray Microtomography

    Elin Xiang1,2, Shumin Yang1,*, Chunjie Cao3, Xinge Liu1, Guanyun Peng4, Lili Shang1, Genlin Tian1, Qianli Ma1, Jianfeng Ma1
    Journal of Renewable Materials, Vol.9, No.9, pp. 1531-1540, 2021, DOI:10.32604/jrm.2021.015346
    Abstract In recent years, bamboo has been widely used in a broad range of applications, a thorough understanding of the structural characteristics of bamboo nodes is essential for better processing and manufacturing of biomimetic materials. This study investigated the complex anatomical structure for the nodes of two bamboo species, Indocalamus latifolius (Keng) McClure and Shibataea chinensis Nakai, using a high-resolution X-ray microtomography (μCT). The results show that the vascular bundle system in the nodal region of I. latifolius and S. chinensis is a net-like structure composed of horizontal and axial vascular bundles. Furthermore, the fiber sheath surrounding metaxylem vessels tended to… More >

  • Open Access

    ARTICLE

    Effect of Doped Alkali Metal Ions on the SO2 Capture Performance of MnO2 Desulfurization Materials at Low Temperature

    Xing Li1,3, Yugo Osaka2,*, Hongyu Huang1, Takuya Tsujiguchi2, Akio Kodama2
    Journal of Renewable Materials, Vol.9, No.9, pp. 1541-1553, 2021, DOI:10.32604/jrm.2021.015514
    (This article belongs to this Special Issue: New Trends in Sustainable Materials for Energy Conversion, CO2 Capture and Pollution Control)
    Abstract Sulfur dioxide (SO2) emissions from diesel exhaust pose a serious threat to the environment and human health. Thus, desulfurization technology and the performance of desulfurization materials must be improved. In this study, MnO2 was modified with various alkali metal ions using the impregnation method to enhance its SO2 capture performance. The composites were characterized intensively by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, and Brunauer-Emmett-Teller theory. The SO2 capture performance of these composites were measured via thermogravimetry, and the effect of doping with alkali metal ions on the SO2 capture performance of MnO2 was investigated. Results showed that… More >

  • Open Access

    ARTICLE

    Control on Gradient Adhesive Loading of Porous Laminate: Effects on Multiple Performance of Composites with Bamboo Bundle and Sliver

    Jianchao Deng1,2, Haiying Zhou2, Fuming Chen2, Shuangbao Zhang1,*, Ge Wang2,*
    Journal of Renewable Materials, Vol.9, No.9, pp. 1555-1570, 2021, DOI:10.32604/jrm.2021.015461
    (This article belongs to this Special Issue: Renewable building materials and properties)
    Abstract Elementary units “bamboo bundle” and “bamboo sliver” were processed and cross-linked as “bamboo-bundle veneer (BBV)” and “bamboo-sliver veneer (BSV)” for preparation of laminated composites. The concept of “high-content-adhesive surface treatment” was raised to improve boards’ performance, rather than increasing adhesive absorption of every layer’s porous unit. That is, some BBVs experienced an extra “dipping & drying” to absorb more resin (named “HBBV”). The effect of the amount of knitting threads was also discussed for influencing BBV’s quality. Results indicated that light transmittance of BBVs decreased as the amount of threads added from 3 to 8, while mechanical stiffness increased. Adding… More >

  • Open Access

    ARTICLE

    Characterization of the Flexural Behavior of Bamboo Beams

    Limin Tian1,2, Jianpeng Wei3, Jiping Hao1,*, Qiushuo Wang1
    Journal of Renewable Materials, Vol.9, No.9, pp. 1571-1597, 2021, DOI:10.32604/jrm.2021.015166
    (This article belongs to this Special Issue: Renewable building materials and properties)
    Abstract Bamboo is a renewable and environmentally friendly material often used for construction. This study investigates the flexural behavior of bamboo beams through theoretical and finite element (FE) analyses. Considering the material’s nonlinearity, a method of calculating load-deflection curves is proposed and validated via FE analysis. The interfacial slippage dominated by the shear stiffness of the interface between two bamboo poles significantly influences the flexural behavior of double-pole bamboo beams. Thus, the load-deflection curves for different shear stiffnesses can be obtained via theoretical and FE analyses. Subsequently, a novel configuration using diagonal steel bands to avoid slippage is presented. An inclination… More >

    Graphic Abstract

    Characterization of the Flexural Behavior of Bamboo Beams

  • Open Access

    ARTICLE

    Recycling of Mud Derived from Backwash Wastewater Coagulation as Magnetic Sodalite Sphere for Zn2+Adsorption

    Suiyi Zhu1, Manhong Ji1, Hongbin Yu1,*, Zhan Qu1, Jiakuan Yang2, Mingxin Huo1, Yi Wang1
    Journal of Renewable Materials, Vol.9, No.9, pp. 1599-1607, 2021, DOI:10.32604/jrm.2021.015189
    (This article belongs to this Special Issue: Current Advances in Green Nanomaterials Applications)
    Abstract

    Herein, we reported a method to prepare magnetic sodalite sphere by using the mud from backwash wastewater after polyaluminum chloride (PAC) coagulation. The results showed that approximately 100% of Fe in the wastewater was precipitated as flocculent iron mud (FM) by adding PAC. FM was converted to spherical magnetic sodalite (FMP) with a diameter of 3 μm via a facile alkali hydrothermal method without adding Al/Si resources or reductant. The product FMP had the saturated magnetization of 10.9 emu g−1 and high Zn2+ adsorption capacity of 50.6 mg g−1. Without coagulation with PAC, the removal rate of Fe from the… More >

    Graphic Abstract

    Recycling of Mud Derived from Backwash Wastewater Coagulation as Magnetic Sodalite Sphere for Zn<sup>2+</sup>Adsorption

  • Open Access

    ARTICLE

    Bamboo Nail: A Novel Connector for Timber Assemblies

    Yehan Xu, Zhifu Dong, Chong Jia, Zhiqiang Wang*, Xiaoning Lu*
    Journal of Renewable Materials, Vol.9, No.9, pp. 1609-1620, 2021, DOI:10.32604/jrm.2021.015193
    (This article belongs to this Special Issue: Renewable building materials and properties)
    Abstract

    Nail connection is widely used in engineering and construction fields. In this study, bamboo nail was proposed as a novel connector for timber assemblies. Penetration depth of bamboo nail into wood was predicted and tested. The influence of nail parameters (length, radius and ogive radius) on penetration depth were verified. For both tested and predicted results, the penetration depth of bamboo nail increased with the increasing length, radius or ogive radius. In addition, the effect of densification on penetration depth or mechanical properties was evaluated. 1.12 g/cm3 was a critical density when densification was needed, and further increment of density… More >

  • Open Access

    ARTICLE

    Carbonation Reaction of Lithium Hydroxide during Low Temperature Thermal Energy Storage Process

    Jun Li1,2,3, Tao Zeng1,2,3,*, Noriyuki Kobayashi4, Rongjun Wu4, Haotai Xu4, Lisheng Deng1,2,3, Zhaohong He1,2,3, Hongyu Huang1,2,3,*
    Journal of Renewable Materials, Vol.9, No.9, pp. 1621-2630, 2021, DOI:10.32604/jrm.2021.015231
    (This article belongs to this Special Issue: New Trends in Sustainable Materials for Energy Conversion, CO2 Capture and Pollution Control)
    Abstract In order to apply lithium hydroxide (LiOH) as a low temperature chemical heat storage material, the carbonation reaction of LiOH and the prevention method are focused in this research. The carbonation of raw LiOH at storage and hydration condition is experimentally investigated. The results show that the carbonation reaction of LiOH with carbon dioxide (CO2) is confirmed during the hydration reaction. The carbonation of LiOH can be easily carried out with CO2 at room temperature and humidity. LiOH can be carbonated at a humidity range of 10% to 20%, a normal humidity region that air can easily be reached. Furthermore,… More >

  • Open Access

    ARTICLE

    The Measurement of the Local Slip in Bamboo-Reinforced Concrete Beams Using Moment-Curvature and Bond-Stress

    Muhtar*
    Journal of Renewable Materials, Vol.9, No.9, pp. 1631-1646, 2021, DOI:10.32604/jrm.2021.015452
    (This article belongs to this Special Issue: Renewable building materials and properties)
    Abstract This paper presents a method of measuring local slip in bamboo-reinforced concrete beams. Local slips (so) are calculated by reducing the elongation of the bamboo reinforcement (ebo) with the elongation of the concrete (eco). The elongation of bamboo reinforcement (ebo) is determined in two ways, namely, read directly through a straingauge mounted on the bamboo reinforcement and calculated based on the force analysis or curvature moment as a control. The elongation of the concrete (eco) is calculated using force analysis or curvature moment. The process of calculating curvature moments and bond stress employs the Excel program. The steps in calculating… More >

    Graphic Abstract

    The Measurement of the Local Slip in Bamboo-Reinforced Concrete Beams Using Moment-Curvature and Bond-Stress

  • Open Access

    ARTICLE

    Structure, Dynamic-Mechanical and Acoustic Properties of Oil Palm Trunk Modified by Melamine Formaldehyde

    Tetti Novalina Manik1,2,*, Sulung Apria Nuki2, Nur Aini Fauziyah1, Mashuri1, Mochamad Zainuri1, Darminto1,*
    Journal of Renewable Materials, Vol.9, No.9, pp. 1647-1660, 2021, DOI:10.32604/jrm.2021.016089
    (This article belongs to this Special Issue: Renewable Material from Agricultural Waste and By-Product and Its Applications)
    Abstract The performance of oil palm trunk wastes from Banjarbaru of South Kalimantan was improved with the help of chemical modification in a two-step treatment. The first was formalization with formaldehyde solution with varying pH, and the second was impregnation with melamine-formaldehyde resin under 5 bar pressure for an hour. In these processes, the samples were cured at 120°C for 10 min and then dried in an oven at (103 ± 2)°C in order to attain a moisture content of less than 6%. These treatments improved the physical properties (density, moisture content, and volume swelling), mechanical resistance, dynamic-mechanical and acoustic performance… More >

    Graphic Abstract

    Structure, Dynamic-Mechanical and Acoustic Properties of Oil Palm Trunk Modified by Melamine Formaldehyde

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