Open Access
ARTICLE
Nina Graupner1,*, Koranat Narkpiban2,5, Thiprada Poonsawat3, Porntip Tooptompong4, Jörg Müssig1
Journal of Renewable Materials, Vol.7, No.8, pp. 693-711, 2019, DOI:10.32604/jrm.2019.06785
Abstract Toddy palm fruit have an apparent density below 0.8 g/cm³ and offer an interesting lightweight construction potential in polylactide (PLA) composites reinforced with 37 mass-% fibres. Single fibre bundles show similar mechanical properties compared with coir: tensile strength of 240 MPa, Young´s modulus of 3.8 GPa and an elongation at break of 31%. However, density and diameter (~ 50 μm) of fruit fibre bundles are significantly lower. The compression moulded composites have a density of 0.9 g/cm³ and achieved an unnotched Charpy impact strength of 12 kJ/m², a tensile strength of 25 MPa, Young’s modulus of 1.9 GPa and an… More >
Open Access
ARTICLE
Chaokun Hong1a,2, Haitao Li1a,2,*, Rodolfo Lorenzo3, Gang Wu1b, Ileana Corbi4, Ottavia Corbi4, Zhenhua Xiong5, Dong Yang1a,2, Huizhong Zhang1a,2
Journal of Renewable Materials, Vol.7, No.8, pp. 713-730, 2019, DOI:10.32604/jrm.2019.07647
Abstract Bamboo is a green construction material in line with sustainable development strategies. The use of raw bamboo in architecture has existed since ancient times. In the long development years of original bamboo buildings, many areas in the world gradually formed unique bamboo buildings, which have become an important local cultural feature. For building structures, joints are the key to ensure structural load transfer. Because of hollow and thin-walled material property of bamboo, the connection in raw bamboo buildings has always been a major difficulty and problem in the application of bamboo, which seriously hinders the development of original bamboo structures.… More >
Open Access
ARTICLE
Md. Anwar Hossain1,2, Lee Hwei Voon1,*
Journal of Renewable Materials, Vol.7, No.8, pp. 731-748, 2019, DOI:10.32604/jrm.2019.04703
Abstract Synthesizing polyol-based ester from biomass feedstocks for the preparation of biolubricant overcomes the dependence on petroleum oil usage. Albeit biomass-derived bio-oil is an alternative for the production of polyol ester, upgrading is essential prior to use as biolubricant. Levulinic acid (LA), obtained from bio-oil was applied for the catalytic esterification with two polyols, e.g., trimethylolpropane (TMP) and pentaerythritol (PE), in the presence of mixed-ligand Ni(II), Co(II), and Fe(II) complexes as catalyst. New mixed-ligand coordination complexes with empirical formula; [Ni(Phe)(Bpy)Cl].H2O, [Co(Phe)(Bpy)Cl].H2O, and [Fe(Phe)(Tyr)Cl].H2O were synthesized by the reaction of ligands [L-phenylalanine (Phe), 4,4'-bipyridine (Bpy), and L-tyrosine (Tyr)] with metal chloride salts… More >
Open Access
ARTICLE
Rakesh Kumar1,*, Reshma Praveen1, Shikha Rani1, K. Sharma2, K. P. Tiwary3,*, K. Dinesh Kumar4
Journal of Renewable Materials, Vol.7, No.8, pp. 749-761, 2019, DOI:10.32604/jrm.2019.06286
Abstract ZnSe nanoparticles have been synthesized by microwave assisted method by using zinc chloride, selenium powder and ethylene diamine. The synthesized nanoparticles have been characterized structurally by FT-IR and XRD as well as morphological characterization was done by scanning electron microscope (SEM). The crystallite size after synthesis was obtained around 30 nm for pure ZnSe nanocrystallites. However, from SEM micrograph, agglomerated ZnSe nanoparticles of irregular shapes were observed. The as-synthesized ZnSe nanoparticles at different contents (1 to 5% w/w w.r.t SPI) were incorporated into soy protein isolate (SPI) to produce reinforced SPI films by solution casting method. The ZnSe nanoparticles incorporated… More >
Open Access
ARTICLE
Fadhel Aloulou1,*, Sabrine Alila2, Habib Sammouda1
Journal of Renewable Materials, Vol.7, No.8, pp. 763-774, 2019, DOI:10.32604/jrm.2019.04071
Abstract The influence of nanofiberwood on the properties of the fresh condition of cement based mortars is not known in detail, despite recent advances in nanocellulose technology and it is related composite materials. Nanofiber wood from industrial waste, produced by high-pressure homogenization, was used as cement partial replacement for cement paste at a content ranging from 0% to 2% by weight of cement. The effect of the nanofiber wood content on the porosity, the compressive strength and the degree of hydration of the cement was investigated. Results have shown an improvement in the compressive strength by more than 50% with 1%… More >
Open Access
ARTICLE
Gouni Thirupathiah1, Sukanya Satapathy1, Aruna Palanisamy1,*
Journal of Renewable Materials, Vol.7, No.8, pp. 775-785, 2019, DOI:10.32604/jrm.2019.06399
Abstract An acidic cation exchange resin has been used to prepare epoxidised castor oil (ECO) which was used as a co-plasticizer with epoxidised soyabean oil (ESBO) for processing polyvinyl chloride (PVC). The structure of ECO was confirmed and its physico chemical properties were evaluated. PVC/ (ESBO&ECO) blends were prepared by melt mixing and compression molded into sheets. The specimens were evaluated for tensile properties, impact strength and hardness. While the tensile strength did not vary much, the elongation reduced with the replacement of ESBO with ECO. Dynamic mechanical studies revealed that the glass transition temperature increased with incorporation of ECO, however,… More >
Open Access
ARTICLE
S. Najmeh Aboutorabi1, Majid Nasiriboroum,2,*, Pourya Mohammadi1, Hassan Sheibani1,*, Hossein Barani3
Journal of Renewable Materials, Vol.7, No.8, pp. 787-794, 2019, DOI:10.32604/jrm.2019.06438
Abstract Silver nanoparticles (AgNPs) were synthesized by a bio-reduction method using an aqueous extract of mullein leaves (Verbascum thapsus L.) functioning as reducing as well as a stabilizing agent. Various synthesis parameters such as reaction time, temperature and concentration of the extract were also studied for the synthesis of AgNPs. The so prepared AgNPs were characterized by various techniques including UV-Vis spectroscopy, X-ray diffraction, scanning electron microscopy (equipped with energy dispersive analysis of X-rays), and transmission electron microscopy. The electron microscopy images suggest the formation of polydispersed spherical AgNPs with average particle size of about 20 nm. The kinetic analysis revealed… More >
Open Access
ARTICLE
Changqing Fu1,2, Jiahui Wang1,2, Lie Chen1,2, Liang Shen1,2,*
Journal of Renewable Materials, Vol.7, No.8, pp. 795-805, 2019, DOI:10.32604/jrm.2019.07503
Abstract In this paper, a fully bio-based vinyl oligomer with high functionalities was successfully prepared from rapeseed oil by three modification steps: epoxidation of rapeseed oil, solvent-free and catalyst-free ring opening by 10-undecylenic acid followed by esterification with 10-undecenoyl chloride. Then, the renewable polymers were prepared by photo-polymerization of these modified vegetable oils with typical thiol monomers: pentaerythritol tetrakis (3-mercaptopropionate), pentaerythritol tris (3-mercaptopropionate) and 1,2-ethanedithiol. The synthesis of the vinyl oligomer was monitored by nuclear magnetic resonance and Fourier-transform infrared spectroscopy. The average number of the carbon-carbon double bonds of the resulting vinyl oligomer is high to be 7.2. The kinetic… More >
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