Journals / JRM / Vol.7, No.11


    A Review on Date Palm Tree: Properties, Characterization and Its Potential Applications

    Mehdi Jonoobi1,*, Masoud Shafie1, Younes Shirmohammadli1, Alireza Ashori2, Hamid Zarea- Hosseinabadi1, Tizazu Mekonnen3
    Journal of Renewable Materials, Vol.7, No.11, pp. 1055-1075, 2019, DOI:10.32604/jrm.2019.08188
    Abstract Date palm (phoenix dactylifera), which is mostly found in the middle east countries such as Iran, Iraq, Saudi Arabia, and the United States (California) that play a significant role in the economical and the environmental condition in those areas. The main purpose of planting dates is its fruit, which is consumed as fresh, dried or processed forms. There are approximately 100 million date palm trees in the worldwide that 62 million of these trees located in the Middle East and North Africa. In Saudi Arabia only, 15000 tons of date palm leaves is prepared as waste materials. The leaves of… More >


    Steam Exploded Peanut Shell Fiber as the Filler in the Rigid Polyurethane Foams

    Zehui Ju1, Qian He1, Tianyi Zhan1, Haiyang Zhang1,*, Lin Sun1, Lu Hong1, Xinyi Shi2, Xiaoning Lu1,*
    Journal of Renewable Materials, Vol.7, No.11, pp. 1077-1091, 2019, DOI:10.32604/jrm.2019.07525
    Abstract In this study, steam exploded peanut shell fibers (SE-PSFs) were utilized to fabricate with rigid polyurethane foam (RPUF) in order to improve sound absorption performance and hydrothermal weather resistance. Optimized method of SE treatment, RPUF preparation and flame retardant treatment were selected to prepare SE-PSF/RPUF composites in this experiment. Physical and mechanical properties including density, water absorption capacity, thickness swelling rate, compressive strength, thermal conductivity and average sound absorption coefficient of SE-PSF/RPUF were investigated and compared with the control (PRUF). The results showed that the density, water absorption capacity, thickness swelling rate and thermal conductivity showed an increasing trend with… More >


    Thermal Responses of Woods Exposed to High Temperatures Considering Apparent Thermo-Physical Properties

    Yun Zhang1, Lingfeng Zhang2, Zhiwei Shan3, Lu Wang1,*, Weiqing Liu1
    Journal of Renewable Materials, Vol.7, No.11, pp. 1093-1108, 2019, DOI:10.32604/jrm.2019.07335
    (This article belongs to this Special Issue: Bio-composite Materials and Structures)
    Abstract It is well known that the use of woods as construction materials can embody carbon content of structural members, which can enhance the urban sustainability. However, due to the combustibility of wood, its current application is restricted. To broaden the application of wood, its thermal responses exposed to fire (high temperature) is investigated in this study. Firstly, the wood kinetic parameters are determined by coats-redfern method using thermal gravimetric (TGA) data. Secondly, the density and thermal conductivity are obtained from parallel and series models. Thirdly, the specific heat capacity formula is presented considering latent and decomposition heat, which can be… More >


    Development of Biocomposites of MCC Extracted From Non-Wood Sources

    T. Dipin1, T. V. Jinitha1, E. Purushothaman1,*
    Journal of Renewable Materials, Vol.7, No.11, pp. 1109-1119, 2019, DOI:10.32604/jrm.2019.07636
    Abstract The present work mainly focuses on the estimation of various components and the extraction of microcrystalline cellulose (MCC) from non- wood sources like Country Almond/Badam shell through acid hydrolysis. This hydrolyzed MCC was successfully used as reinforcement for development of biocomposites. Country Almond/Badam trees are found all over Kerala, India and they give nuts once in a year. Usually the nut shells are discarded and are becoming one of the sources of agricultural waste. During this investigation various components were isolated from the Country Almond shells and they were characterised using different spectral and analytical techniques thereby the composition of… More >


    Characterization of Manmade and Recycled Cellulosic Fibers for Their Application in Building Materials

    Nadezda Stevulova1,*, Viola Hospodarova1, Adriana Estokova1, Eva Singovszka1, Marian Holub1, Stefan Demcak1, Jaroslav Briancin2, Anton Geffert3, Frantisek Kacik3, Vojtech Vaclavik4, Tomas Dvorsky4
    Journal of Renewable Materials, Vol.7, No.11, pp. 1121-1145, 2019, DOI:10.32604/jrm.2019.07556
    Abstract The aim of this study was to characterize two types of cellulosic fibers obtained from bleached wood pulp and unbleached recycled waste paper with different cellulose content (from 47.4 percent up to 82 percent), to compare and to analyze the potential use of the recycled fibers for building application, such as plastering mortar. Changes in the chemical composition, cellulose crystallinity and degree of polymerization of the fibers were found. The recycled fibers of lower quality showed heterogeneity in the fiber sizes (width and length), and they had greater surface roughness in comparison to high purity wood pulp samples. The high… More >


    Mechanical Properties of a Eucalyptus-Based Oriented Oblique Strand Lumber for Structural Applications

    Jiawei Chen1, Haibei Xiong1,*, Zhifang Wang1, Linqing Yang2
    Journal of Renewable Materials, Vol.7, No.11, pp. 1147-1164, 2019, DOI:10.32604/jrm.2019.07642
    (This article belongs to this Special Issue: Bio-composite Materials and Structures)
    Abstract Wood and wood-based composite materials have gained increasing attention in the sustainable building industry because of their renewability and environmental friendliness. Oriented oblique strand lumber (Eucalyptus Strand Wood, ESWood), which is manufactured from fast-growing small diameter eucalyptus wood (Eucalyptus urophylla × E. grandis), is introduced in this paper. Small clear specimen tests were conducted to determine the mechanical properties of ESWood material while full-scale component tests were performed to observe the structural performance of ESWood beams. A comparison of mechanical properties of ESWood with other wood/bamboo-based materials is then reported. From the results presented herein, it appears that the strength… More >


    Material Selection of a Natural Fibre Reinforced Polymer Composites using an Analytical Approach

    M. Noryani1, 3, 5, S. M. Sapuan1, 2,*, M. T. Mastura4, 5, M. Y. M. Zuhri1, E. S. Zainudin1
    Journal of Renewable Materials, Vol.7, No.11, pp. 1165-1179, 2019, DOI:10.32604/jrm.2019.07691
    Abstract Material selection has become a critical part of design for engineers, due to availability of diverse choice of materials that have similar properties and meet the product design specification. Implementation of statistical analysis alone makes it difficult to identify the ideal composition of the final composite. An integrated approach between statistical model and micromechanical model is desired. In this paper, resultant natural fibre and polymer matrix from previous study is used to estimate the mechanical properties such as density, Young’s modulus and tensile strength. Four levels of fibre loading are used to compare the optimum natural fibre reinforced polymer composite… More >


    Study on the Preparation and Adsorption Property of Polyvinyl Alcohol/Cellulose Nanocrystal/Graphene Composite Aerogels (PCGAs)

    Yan Wu1,*, Xinyu Wu1, Feng Yang2,*, Li Xu1, Meng Sun1
    Journal of Renewable Materials, Vol.7, No.11, pp. 1181-1195, 2019, DOI:10.32604/jrm.2019.07493
    (This article belongs to this Special Issue: Renewable Polymer Materials and Their Application)
    Abstract The cellulose nanocrystals/graphene composite aerogel (CGA) and polyvinyl alcohol/cellulose nanocrystals/graphene composite aerogel (PCGA) were prepared by suspension titration, tert-butanol solution replacement and freeze-drying successively. The removal rates of methyl blue (MB) from water by CGA and PCGA were evaluated and the effects of additions, adsorption time, reaction temperature and pH value of CGA and PCGA on MB removal rate were discussed. It was found that the optimal concentrations of both CGA and PCGA were 2 g∙L-1 in the adsorption reaction process and the adsorption equilibrium was reached within 120 min. The higher the initial pH value of MB solution is,… More >


    Comparison of Dilute Organic Acid Pretreatment and a Comprehensive Exploration of Citric Acid Pretreatment on Corn Cob

    Hui Qiao1, Jingzhao Cui1, Shuiping Ouyang1, Jinjie Shi2, Jia Ouyang1,3,*
    Journal of Renewable Materials, Vol.7, No.11, pp. 1197-1207, 2019, DOI:10.32604/jrm.2019.07735
    (This article belongs to this Special Issue: Renewable Polymer Materials and Their Application)
    Abstract As an important agricultural waste, corn cob is one of the most abundant lignocellulosic biomass. In this work, dilute acid pretreatment using seven different organic acids were compared for compositional analysis of corn cob. The first pKa of organic acids, influenced by the number and type of the side group and distance between two carboxylic groups, played a crucial role in the pretreatment effect. Citric acid was found to have better pretreatment performance than other tested dicarboxylic acids. Under the condition of 30 mM, 160°C and 60 min, the level of xylose reached 22.64 g/L in pretreatment liquid, and the… More >


    Extraction, Optical Properties and Bio-Imaging of Fluorescent Composition From Moso Bamboo Shoots

    Jinlai Yang1,2,3, Liangru Wu1,2,3,*, Yanhong Pan1,2,3, Hao Zhong1,2,3
    Journal of Renewable Materials, Vol.7, No.11, pp. 1209-1219, 2019, DOI:10.32604/jrm.2019.07896
    (This article belongs to this Special Issue: Renewable Polymer Materials and Their Application)
    Abstract A novel fluorescent composition was firstly isolated from natural winter fresh Moso bamboo shoots, and its optical properties were fully investigated by fluorescence spectroscopy. It could emit strong blue light both in solid and solution state, providing high fluorescence intensity in ethanol. The solution’s concentration and addition of water greatly affected the fluorescence intensity, high concentration and addition of much water could quench fluorescence. Apoptosis results showed that the fluorescent extract (0-25 mg/L) could not induce apoptosis of Hela cells. Confocal fluorescent microscopic imaging in human hepatocellular carcinoma cells (HepG2) was realized using the fluorescent extract, it could dye the… More >


    Systematically Monitoring, Relational Database and Technology Roadmapping for Trends and Innovation Opportunities in Biopolymers

    Selma B. Jaconis1,*, Augusto T. Morita2, Paulo L. A. Coutinho3, Suzana Borschiver1
    Journal of Renewable Materials, Vol.7, No.11, pp. 1221-1230, 2019, DOI:10.32604/jrm.2019.00025
    Abstract In recent years environmental and sustainability concerns have impacted the global chemical industry and instituted a rush to produce products from renewable raw materials. This dynamic, complex and turbulent organizational scenario, around themes touching on the issue of sustainable development model, was created involving a large number of different actors: chemical/petrochemical industries, agroindustry companies, oil/gas companies, brand owners and end users, biotechnology startups, governments, universities and society. This paper proposed the application of a structured and dynamic method of technological prediction for biopolymers in three levels: systematic monitoring process, relational database and the “alive” Technology Roadmapping visualization tool. The main… More >


    Study on Thermal Insulation Performance of Cross-Laminated Bamboo Wall

    Qingfang Lv1,*, Weiyang Wang1, Ye Liu1
    Journal of Renewable Materials, Vol.7, No.11, pp. 1231-1250, 2019, DOI:10.32604/jrm.2019.08345
    (This article belongs to this Special Issue: Bio-composite Materials and Structures)
    Abstract In recent years, bamboo, as a green building material, has attracted more and more attention worldwide. Inspired by the investigation of cross-laminated timber in structural systems, a new engineered cross-laminated bamboo (CLB) consisting of the cross lamination of bamboo scrimber plates is proposed in this paper. To evaluate its potential in structural applications, the thermal insulation performances of the CLB walls and CLB walls with the EPS foam plate were studied and evaluated by the temperature-controlled box-heat flow meter method. Test results indicated that the thermal insulation performance improved with the increase of thickness, but different wall configurations had little… More >

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