Open Access
ARTICLE
Kaoutar Kara1,*, Fatiha Ouanji2, El Mostapha LOTFI1, Mohammed El Mahi1, Mohamed Kacimi2
Journal of Renewable Materials, Vol.7, No.1, pp. 1-7, 2019, DOI:10.32604/jrm.2019.00016
Abstract A tricalcium phosphate (TCP) material was produced from sardine and mackerel waste using a heat treatment method after a Soxhlet extraction to obtain the non-soluble portion of fish waste. The bones were annealed at temperatures between 400°C and 1200°C. The thermal analysis (TG-DTA) was carried out to investigate the thermal stability of TCP and to confirm the removal of organic matter from the raw fish. The calcined bones were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and field emission scanning electron microscopy (FE-SEM). The calcium to phosphorous weight ratio was determined by ICP- AES. FT-IR and XRD… More >
Open Access
ARTICLE
Galia Moreno, Karla Ramirez, Marianelly Esquivel, Guillermo Jimenez*
Journal of Renewable Materials, Vol.7, No.1, pp. 9-20, 2019, DOI:10.32604/jrm.2019.00017
Abstract Poly(lactic acid) (PLA) composite films reinforced with microcrystalline cellulose (MCC) extracted from pineapple leaf fibers (PALF) were prepared by a solution casting procedure. In an attempt to improve the interaction between PLA and cellulose, two approaches were adopted; first, poly(ethylene glycol) (PEG) was used as a surfactant, and second, the cellulosic fibers were pre-treated using tert-butanol (TBA). Lignocellulosic and cellulosic substrates were characterized using Fourier transform infrared (FTIR), wide-angle X-ray scattering (WAXS), and thermogravimetrical analysis (TGA). MCC from PALF showed good thermal stability, left few residues after decomposing, and exhibited high crystallinity index. Mechanical, thermal and thermomechanical properties of the… More >
Open Access
ARTICLE
E. M. Ciannamea1,*, L. A. Castillo2,3, R. A. Ruseckaite1, S. E. Barbosa2,3
Journal of Renewable Materials, Vol.7, No.1, pp. 21-30, 2019, DOI:10.32604/jrm.2019.00043
Abstract Blends of gelatin (Ge) plasticized with varying amounts of glycerol (Gly), buffer solution pH 10 and epoxidized soybean oil (ESO) to enhance hydrophobicity were prepared by mixing and injection-molding. Blends were characterized by rheological tests and microscopy to select optimal conditions for scaling up their processing. The effect of each component on rheological response was analyzed using parallel plate geometry. Coating of gelatin specimens with PDMS during rheological tests led to reliable and reproducible results since water evaporation was prevented. A gradual increment in ESO concentration led to blends with increased degree of phase separation, as evidenced by optical and… More >
Open Access
ARTICLE
Azam Sardari1,2, Ali Asghar Sabbagh Alvani1,2,3,*, Seyed Reza Ghaffarian1,2
Journal of Renewable Materials, Vol.7, No.1, pp. 31-40, 2019, DOI:10.32604/jrm.2019.00045
Abstract In this study, three sorts of polyols were successfully synthesized from castor oil using a Dean-Stark quick, eco-friendly and high-efficiency method. For this purpose, castor oil was epoxidized in the presence of two types of catalysts including γ-alumina and formic acid, named as ECOAl and ECOF, respectively. Epoxidized castor oils were then characterized by use of hydrogen nuclear magnetic resonance (H-NMR) and oxirane oxygen content analysis. The relative percentages of conversion double bond to oxirane were obtained 96% and 74% for ECOAl and ECOF, respectively. Ring opening reaction of ECOAl was performed by two types of saponified castor oil as… More >
Open Access
ARTICLE
Yang Yu1, Ramiz Boy1,2,*, Richard Kotek1
Journal of Renewable Materials, Vol.7, No.1, pp. 41-55, 2019, DOI:10.32604/jrm.2019.00105
Abstract Current industrial methods for dissolution of cellulose in making regenerated cellulose products are relatively expensive, toxic and dangerous and have environmental problems coming with the hazard chemical wastes. To solve these problems, a novel ethylenediamine and potassium thiocyanate (ED/KSCN) solvent system was developed, that is economical, ecofriendly, and highly efficient. The ED/KSCN solvent system was proven to be a suitable solvent for fabricating cellulose (blended with other polymers) membranes. In this study, gluten was used to develop nonporous membranes with cellulose. The method of casting these membranes provided better ones than the former researchers’ techniques. These composite membranes’ physical and… More >
Open Access
ARTICLE
Lu Cui1,2,*, Xihuai Qiang1,2
Journal of Renewable Materials, Vol.7, No.1, pp. 57-71, 2019, DOI:10.32604/jrm.2019.00118
Abstract Based on a novel triazine compound, the properties of tanned leather and commercial feasibility in pilot scale have been investigated. Then this novel approach tanning was compared with conventional chrome tanning: in the condition of less-salt pickling and chrome free, the physicochemical properties including thermal stability and mechanical strength were analyzed. Meanwhile, the surface roughness and fiber dispersion were evaluated as well. The results show that the thermal stability and mechanical strength of the triazine compound tanned leather are similar to conventional chrome tanned leather, the fiber bundle is well-dispersed and much evener than that of chrome treating. The optimized… More >
Open Access
ARTICLE
Ingrid Souza Vieira da Silva1, Natália Soares Prado1, Patrícia Gontijo de Melo2, Danilo Campion Arantes3, Mara Zeni Andrade4, Harumi Otaguro1, Daniel Pasquini1,*
Journal of Renewable Materials, Vol.7, No.1, pp. 73-87, 2019, DOI:10.32604/jrm.2019.00042
Abstract In this work, nine different types of edible coating based on pectin, cellulose nanocrystals, glycerol, and essential oil of lemongrass were prepared and used to coat strawberries with a film formed directly on the surface of the coated fruit. The effects of the different edible coatings on refrigerated fruits in terms of weight loss, titratable acidity, total soluble solids, pH, and anthocyanin content was evaluated after 2 days, 4 days, 6 days, and 8 days of storage. Application of the edible coatings reduced the weight loss of the coated strawberries and the anthocyanin content. The total soluble solids content of… More >
Open Access
ARTICLE
B. Benobeidallah1, A. Benhamida1, A. Dorigato2,*, A. Sola3, M. Messori3, A. Pegoretti2
Journal of Renewable Materials, Vol.7, No.1, pp. 89-102, 2019, DOI:10.32604/jrm.2019.00136
Abstract Various amounts (up to 10 wt%) of palygorskite nanofibers functionalized by 3-aminopropyltriethoxysilane (APTES) coupling agent were used to reinforce polyamide 11 nanocomposites prepared by melt compounding. The covalent bonding of the silane on the palygorskite surface was confirmed by infrared spectroscopy and thermogravimetric analysis. X-ray diffraction revealed the retention of the α-form of polyamide crystals upon the addition of both natural and silane treated palygorskite nanorods. All the investigated nanocomposites showed an improvement of the thermal stability, especially when surface treated palygorskite nanofibers were considered. Tensile tests and dynamic mechanical thermal analyses on the prepared materials evidenced how the incorporation… More >
Login
Register
Submit a Paper
Propose a Special lssue