The Journal of Renewable Materials (JRM) is an interdisciplinary journal publishing original research covering all aspects of renewable materials, namely bio-based materials, sustainable materials, green chemistry and including recycling and recovery of spent materials. The scope of the journal is devoted to reports of new and original experimental and theoretical research in the areas of materials, engineering, physics, bioscience, processing, environmental science and chemistry, which are related to the critical renewable and recyclable applications.
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Manuscripts submitted to old submission system before 25 June 2023 will continue to undergo normal review process in old submission system. New submissions after 25 June 2023 must be made through new submission system.
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Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3595-3612, 2023, DOI:10.32604/jrm.2023.030005
(This article belongs to this Special Issue: New Trends in Bio-oil Production, Conversion and Utilization )
Abstract A new method of pretreatment of corn straw with Phanerochaete chrysosporium combined with pyrolysis was
proposed to improve the quality of bio-oil. The characterization results demonstrated that microbial pretreatment
was an effective method to decrease the lignin, which can achieve a maximum removal rate of 44.19%. Due to the
destruction of biomass structure, the content of alkali metal and alkaline earth metal is reduced. Meanwhile, the
depolymerized biomass structure created better pyrolysis conditions to promote the pyrolysis efficiency, increase
the average decomposition rate of pyrolysis and reduce the residue. In fast pyrolysis, because of the enrichment of
cellulose and the… More >
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Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3613-3624, 2023, DOI:10.32604/jrm.2023.028111
(This article belongs to this Special Issue: Natural Fibre Composites: Design, Materials Selection and Fabrication)
Abstract The residual resources of ramie fiber-based textile products were used as raw materials. Ramie fiber felt (RF) was
modified by NaClO2 aqueous solution and then impregnated with water-based epoxy resin (WER). RF/WER
transparent composite materials were prepared by lamination hot pressing process. The composite materials’color
difference, transmittance, haze, density, water absorption, and mechanical properties were determined to assess
the effects of NaClO2 treatment and the number of ramie fiber layers on the properties of the prepared composites. The results showed significantly improved optical and mechanical properties of the RF/WER transparent
composites after NaClO2 treatment. With the increase of ramie fiber… More >
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Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3625-3645, 2023, DOI:10.32604/jrm.2023.030373
Abstract Water repellant, flexible biofoams using tannin esterified with various fatty acid chains, namely lauric, palmitic
and oleic acids, by reaction with lauryl chloride, palmitoyl chloride, and oleyl chloride were developed and their
characteristics compared with the equivalently esterified rigid biofoams. Glycerol, while initially added to control
the reaction temperature, was used as a plasticizer yielding flexible biofoams presenting the same water repellant
character that the equivalent rigid foams. Acetaldehyde was used as the cross-linking agent instead of formaldehyde, as it showed a better performance with the esterified tannin. The compression results showed a significant
decrease of the Modulus of Elasticity… More >
Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3647-3657, 2023, DOI:10.32604/jrm.2023.028438
(This article belongs to this Special Issue: Biochar Based Materials for a Green Future)
Abstract Hydrochar prepared with four typical biowastes, pine wood, food waste, digested sewage sludge, and Chlorella
were applied for the promotion of anaerobic digestion. The gas production and substrate composition were analyzed associated with the hydrochar characteristics. The results suggested that Chlorella hydrochar (C-C) showed
the highest cumulative yield of methane (approximately 345 mL) with high total organic carbon (TOC) removal
efficiency and low volatile fatty acids (VAFs) concentration. Especially, food waste hydrochar (F-C) showed a poor
effect on anaerobic digestion and aroused 1.4–1.6 g/L accumulation of VAFs, in which the toxic components may
account for the low efficiency. The C-C… More >
Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3659-3680, 2023, DOI:10.32604/jrm.2023.029220
Abstract Methanation is an effective way to efficiently utilize product gas generated from the pyrolysis and gasification of
organic solid wastes. To deeply study the heat transfer and mass transfer mechanisms in the reactor, a successful
three-dimensional comprehensive model has been established. Multiphase flow behavior and heat transfer
mechanisms were investigated under reference working conditions. Temperature is determined by the heat release
of the reaction and the heat transfer of the gas-solid flow. The maximum temperature can reach 951 K where the
catalyst gathers. In the simulation, changes in the gas inlet velocity and catalyst flow rate were made to explore… More >
Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3681-3692, 2023, DOI:10.32604/jrm.2023.027671
Abstract The treatment of wheat straw is very difficult, and its utilization rate is very low; accumulation causes air pollution and
even fire. To make full use of wheat straw resources, we examined how using different physical and chemical methods
to treat the wheat straw which can improve its strength abilities, or enhance the activity of wheat straw ash. In terms of
concrete additives, it can reduce the amount of cement used. In this paper, we found that alkali treatment can significantly improve the tensile strength of wheat straw fiber, but polyvinyl alcohol treatment has no obvious effect
on the strength… More >
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Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3693-3709, 2023, DOI:10.32604/jrm.2023.027748
(This article belongs to this Special Issue: Active and Intelligent Food Packaging Films)
Abstract The issue of plastic pollution has attracted widespread social attention. Gelatin is valued as a degradable bio-based
material, especially as an edible active packaging material. However, the commonly used solution-casting filmforming technology limits the mass production of gelatin films. In order to improve the production efficiency
and enhance the commercial value of gelatin films, in this study, fish gelatin (FG) particles were successfully
blended with essential oils (EOs) to prepare active films by melt extrusion technique, a common method for commercial plastics, and applied to bread preservation. FG and EOs showed good compatibility with each other. The
elongation at break… More >
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Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3711-3723, 2023, DOI:10.32604/jrm.2023.027826
Abstract Thermal alkaline hydrolysis is a common pretreatment method for the utilization of excess activated sludge
(EAS). Owing to strict environment laws and need for better energy utilization, new methods were developed
in this study to improve the efficiency of pretreatment method. Direct thermal hydrolysis (TH), pasteurized thermal hydrolysis (PTH), and alkaline pasteurized thermal hydrolysis (PTH + CaO and PTH + NaOH) methods
were used to treat EAS. Each method was compared and analyzed in terms of dissolution in ammonium nitrogen
(NH4
+
-N) and soluble COD (SCOD) in EAS. Furthermore, the removal of tetracycline resistance genes (TRGs)
and class 1… More >
Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3725-3738, 2023, DOI:10.32604/jrm.2023.027895
Abstract Screw connection is a type most commonly applied to timber structures. As important commercial tree species in
China, Masson pine and Chinese fir have the potential to prepare wood structures. In this study, the effects of the
diameter of the self-tapping screw and the guiding bores on the nail holding performance on different sections of
Masson pine and Chinese fir dimension lumbers were mainly explored. The results showed that: (1) The nail
holding strength of the tangential section was the maximum, followed by that of the radial section, and that
of the cross section was the minimum. (2) The nail… More >
Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3739-3750, 2023, DOI:10.32604/jrm.2023.028090
(This article belongs to this Special Issue: Carbon-Based Nanomaterials from Renewable Materials: Synthesis, Properties and Applications)
Abstract Biomass-derived carbon dots (C-dots) are considered a very important carbon material in metal ion detection of
their small environmental impact, simple preparation process, and relatively low cost. A green approach for
synthesizing biomass-derived C-dots from Chenpi using a hydrothermal method without further processing is
proposed in the present study. The as-synthesized C-dots show excellent fluorescence properties, superior resistance to UV irradiation photobleaching, and high photostability in salt-containing solutions. The C-dots were
used in the form of label-free fluorescent probes for sensitively detecting Hg2+ selectively. The outcome relationship behaved linearly and was established based on a given range between 10–300 nM… More >
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Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3751-3767, 2023, DOI:10.32604/jrm.2023.028987
(This article belongs to this Special Issue: Sustainable Concrete with Recyclable Materials)
Abstract Waste Glass (WGs) and Coir Fiber (CF) are not widely utilized, even though their silica and cellulose content can
be used to create construction materials. This study aimed to optimize mortar compressive strength using
Response Surface Methodology (RSM). The Central Composite Design (CCD) was applied to determine the optimization of WGs and CF addition to the mortar compressive strength. Compressive strength and microstructure
testing with Scanning Electron Microscope (SEM), Fourier-transform Infrared Spectroscopy (FT-IR), and X-Ray
Diffraction (XRD) were conducted to specify the mechanical ability and bonding between the matrix, CF, and
WGs. The results showed that the chemical treatment of… More >
Graphic Abstract
Open Access
ARTICLE
Journal of Renewable Materials, Vol.11, No.10, pp. 3769-3787, 2023, DOI:10.32604/jrm.2023.029270
Abstract Secondary lignocellulosic biomass has proved to be useful as an energy source through its oxidation by means of
combustion processes. In accordance with the above, in this paper, we wanted to study the ash from urban pruning residues that are generated in cities in the Neotropics. Species such as Licania tomentosa, Azadirachta indica,
Ficus benjamina, Terminalia catappa, Leucaena leucocephala, Prosopis juliflora and Pithecellobium dulce were
selected because they have been previously studied and showed potential for thermal energy generation. These
materials were calcined in an oxidizing atmosphere and characterized by X-ray diffraction and fluorescence, scanning electron microscopy with microchemistry, BET… More >
Graphic Abstract