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  • Open Access

    ARTICLE

    Studies on Epoxidised Castor Oil as Co-Plasticizer with Epoxidised Soyabean Oil for PVC Processing

    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

    Synthesis of a Fully Biobased Polyfunctional Vinyl Oligomer and Their UV Cured Films Prepared via Thiol-ene Coupling

    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 >

  • Open Access

    ARTICLE

    Preparation of Antibacterial Cotton Wound Dressing By Green Synthesis Silver Nanoparticles Using Mullein Leaves Extract

    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

    Stabilization and Evaluation of Modified Nanofiber Flour Wood on the Properties of Cement-Baszd Mortar

    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

    ZnSe Nanoparticles Reinforced Biopolymeric Soy Protein Isolate Film

    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

    Review on Connections for Original Bamboo Structures

    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

    Toddy Palm (Borassus Flabellifer) Fruit Fibre Bundles as Reinforcement in Polylactide (PLA) Composites: An Overview About Fibre and Composite Characteristics

    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

    Compression Behaviors of Parallel Bamboo Strand Lumber Under Static Loading

    Haitao Li1,2,*, Zhenyu Qiu2, Gang Wu1,*, Dongdong Wei3, Rodolfo Lorenzo4, Conggan Yuan3, Huizhong Zhang1,2, Rong Liu1,2

    Journal of Renewable Materials, Vol.7, No.7, pp. 583-600, 2019, DOI:10.32604/jrm.2019.07592

    Abstract In order to investigate the influence of length and compression directions upon behaviour of parallel bamboo strand lumber (PBSL) specimens, 240 axial compression tests have been performed. With three similar one different typical failure modes, the mechanical performance for PBSL specimens under compression parallel to grain and perpendicular to grain are different as a whole. From the point of the characteristic values, the compression strength parallel to grain is 2.1 times of the compression strength perpendicular to grain. The elastic modulus for compression parallel to grain is 3.64 times of the compression strength perpendicular to grain. While the compression ratios… More >

  • Open Access

    ARTICLE

    Evaluation of Antioxidants, Total Phenolics and Antimicrobial Activities of Ethyl Acetate Extracts From Fungi Grown on Rice Straw

    Bahaa T. Shawky1, Mohammed Nagah1, Mosad A. Ghareeb2, Gamal M. El-Sherbiny3, Saad A. M. Moghannem3, Mohamed S. Abdel-Aziz1,*

    Journal of Renewable Materials, Vol.7, No.7, pp. 667-682, 2019, DOI:10.32604/jrm.2019.04524

    Abstract Rice straw (RS) collected from Egyptian agricultural environment (Al-Masied village-Alsharqia Governorate-Egypt) was used as substrate for three fungal isolates namely: 4b, 1Asp, Pleurotus ostreatus NRRL 3501 and mixed culture of (4b, 1Asp). Isolates number 4b and 1Asp were identified using the molecular technique (18S rRNA). Isolate 4b and 1Asp, were identified as Trichoderma saturnisporum MN1-EGY and Aspergillus niger MN2-EGY, respectively. Trichoderma saturnisporum MN1-EGY extract exhibited the highest antimicrobial activity compared to the other fungal extracts. Total phenolic, antimicrobial and antioxidant activities were also determined from the ethyl acetate extract of rice straw inoculated by these fungi. The antioxidant scavenging concentration(SC50)… More >

  • Open Access

    ARTICLE

    Influence and Dispersion of Nanofiber of Wood Modified on Properties of Cement Based Mortars

    Fadhel Aloulou1,*, Alila Sabrine2, Habib Sammouda1

    Journal of Renewable Materials, Vol.7, No.7, pp. 631-641, 2019, DOI:10.32604/jrm.2019.04070

    Abstract Wood nanofibers from industrial waste have been used as polymeric material to reinforce the cement paste to a content of up to 2% by weight of cement. The effect of the wood nanofibre content on the porosity, the compressive strength and the degree of hydration of the cement was studied. The results showed an improvement in compressive strength of over 50% with 1% of added fiberwood. Chemical modification of nanofiber wood by grafting alkyl chains to their surface can reduce the amount of water absorbed by the sample. Addition of an anionic additive (SDBS) to the mixing water improves the… More >

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