Open Access
ARTICLE
Haiyang Ding1,2,3,4,5, Xiaohua Yang1,2,3,4,5, Lina Xu1,2,3,4,5, Shouhai Li1,2,3,4,5, Jianling Xia1,2,3,4,5, Mei Li1,2,3,4,5,*
Journal of Renewable Materials, Vol.8, No.1, pp. 1-11, 2020, DOI:10.32604/jrm.2020.08165
Abstract Thermosetting polyurethanes are widely used in various fields owing to
their excellent elasticity, strength and solvent resistance. Three environmental
friendly propyl gallate-based self-healing polyurethanes were prepared from polyurethane prepolymers with varying isocyanate content. The thermal stabilities of the
polyurethanes were tested using thermogravimetric analysis. Their self-healing and
mechanical properties were analyzed using a universal testing machine and dynamic
thermomechanical analysis. The polyurethanes were found with high self-healing
ability and excellent mechanical properties due to the absence of phenolic carbamate.
These qualities improved with increased isocyanate content and the prolonged selfhealing time. We found, therefore, that the propyl gallate-based polyurethane has… More >
Open Access
ARTICLE
Haitao Li1,*, Huizhong Zhang1, Zhenyu Qiu1, Jingwen Su2, Dongdong Wei3, Rodolfo Lorenzo4, Conggan Yuan3, Hongzheng Liu5, Chungui Zhou6
Journal of Renewable Materials, Vol.8, No.1, pp. 13-27, 2020, DOI:10.32604/jrm.2020.09341
Abstract In order to investigate the basic mechanical properties and stress strain
relationship model for bamboo scrimber manufactured based on a new technique, a large quantities of experiments have been carried out. Based on the analysis of the test results, the following conclusions can be drawn. Two main
typical failure modes were classified for bamboo scrimber specimens both under
tension parallel to grain and tension perpendicular to grain. Brittle failure happened for all tensile tests. The slope values for the elastic stages have bigger discreteness compared with those for the specimens under tensile parallel to grain.
The failure modes for bamboo… More >
Open Access
ARTICLE
Maud Chemin, Céline Moreau, Bernard Cathala, Ana Villares*
Journal of Renewable Materials, Vol.8, No.1, pp. 29-43, 2020, DOI:10.32604/jrm.2020.07850
Abstract In this work, we studied the adsorption of modified cellulose nanocrystals onto solid surfaces by quartz crystal microbalance with dissipation monitoring
(QCM-D). Cellulose nanocrystals obtained from tunicate (CNC) were modified at
reducing end by amidation reactions. Two different functionalities were investigated: a polyamine dendrimer (CNC-NH2), which interacts with gold surface
by the amine groups; and a biotin moiety (CNC-Biot), which has a strong affinity
for the protein streptavidin (SAV). QCM-D results revealed different adsorption
behaviors between modified and unmodified CNCs. Hence, unmodified CNCs
covered almost all the surface forming a rigid and flat layer whereas reducing
end modified CNCs remained… More >
Open Access
ARTICLE
Yufeng Ma1, Xuanang Gong1, Puyou Jia2,*
Journal of Renewable Materials, Vol.8, No.1, pp. 45-55, 2020, DOI:10.32604/jrm.2020.08621
Abstract In order to improve the comprehensive performance of phenolic foam,
9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) was grafted
with itaconic acid (ITA) (DOPO-g-ITA) to modify microcrystalline cellulose
(MCC). DOPO-g-ITA modified MCC (DIMMCC) was used to prepare composite
phenolic foam (DCPF). The structures of DIMMCC were verified by Fourier
transform infrared spectroscopy (FT-IR). The microstructure and crystalline property were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD) respectively. Compared with MCC, the crystallinity of
DIMMCC was dramatically decreased, but the diffraction peak positions were
unchanged. Thermal stability was decreased, and Ti decreased by 45.0°C. The
residual carbon (600°C) was increased by 22.34%.… More >
Open Access
ARTICLE
Kunal Wazarkar, Anagha Sabnis*
Journal of Renewable Materials, Vol.8, No.1, pp. 57-68, 2020, DOI:10.32604/jrm.2020.07773
Abstract In the present research, cardanol based di-acrylic UV oligomer was
synthesized by thiol-ene coupling followed by ring opening reaction with glycidyl
methacrylate. The intermediate as well as final diacrylate materials were analyzed
by chemical as well as spectroscopic analysis. Further, ultraviolet (UV) radiation
curable formulations were prepared by replacing commercial epoxy acrylate with
synthesized UV oligomer in 10-50 wt% and applied on wood panels. The coated
films were then evaluated for their optical, mechanical, chemical and thermal
properties. Studies showed that up to 30 wt% amount of UV oligomer the coatings
exhibited at par mechanical and chemical properties. The stain… More >
Open Access
ARTICLE
Ali Abdelmoteleb1, Benjamin Valdez-Salas2, Ernesto Beltran-Partida2, Daniel Gonzalez-Mendoza3,*
Journal of Renewable Materials, Vol.8, No.1, pp. 69-78, 2020, DOI:10.32604/jrm.2020.08334
Abstract The aim of this study was to evaluate the antibacterial and antifungal
activities of eco-friendly synthesized silver nanoparticles. The silver nanoparticles
were synthesized by biological method using aqueous extract of Abronia villosa.
Synthesis of silver nanoparticles was confirmed by color change and characterized
using UV-visible spectroscopy, scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), dynamic light scattering (DLS), and zeta
potential analysis. The SEM analysis revealed the presence of spherical silver
nanoparticles of the size range 21 to 33 nm. Synthesized silver nanoparticles were
used to evaluate their antibacterial effects at different concentrations (25, 50, 75
and 100 µg/ml)… More >
Open Access
ARTICLE
Jianglin Zhao1, Xiaotong Zhang1, Weiwei Lei1, Xingqi Ji1, Xin Zhou1,2,*, Yong Xu1,2
Journal of Renewable Materials, Vol.8, No.1, pp. 79-88, 2020, DOI:10.32604/jrm.2020.08761
Abstract Amorphophallus konjac is rich in glucomannan, which can be hydrolyzed
into glucose and mannose, thereby acting as an economic raw material for the acquisition of glucose and mannose. The total sugar yield was 91.2% when konjac powder
was treated with 0.75% hydrochloric acid at 121°C for 1 h. Thus, dilute acid hydrolysates of konjac powder were used as a carbon source for obtaining value-added
products. Here we showed that the microbial production of ethanol and mannonic
acid was obtained by employing Candida shehatae (C. shehatae) and Gluconobacter
oxydans (G. oxydans). Through a step-by-step bioprocess, glucose is the first selectively converted… More >
Open Access
ARTICLE
Xiaodong Wang1,2, Meng Su2, Chuntai Liu2, Changyu Shen2, Xianhu Liu2,*
Journal of Renewable Materials, Vol.8, No.1, pp. 89-99, 2020, DOI:10.32604/jrm.2020.08493
Abstract Poly (vinyl alcohol) (PVA)/reduced graphene oxide (rGO) nanocomposites is prepared by the immersion of PVA/graphene oxide (GO) nanocomposites
in the reducing agent aqueous solution. The PVA/graphene nanocomposites can
be used as scaffold after treatment by chemical crosslinking agents. The surface
hydrophilicity of the nanocomposite scaffolds decreased with the addition of
GO or rGO by measuring the contact angles of scaffolds. The electrical conductivity of PVA/rGO nanocomposite scaffold increased with rGO content increased.
The highest conductivity of PVA/rGO nanocomposite scaffolds with 10 wt% rGO
could reach to 12.16 × 10−3 S/m. The NIH-3T3 fibroblasts attach and grow well
on the surface… More >
Open Access
ARTICLE
Abdelghani Hassainia1, Hamid Satha1,*, Boufi Sami2
Journal of Renewable Materials, Vol.8, No.1, pp. 101-111, 2020, DOI:10.32604/jrm.2020.07725
Abstract Two methods were used to produce chitosan by deacetylation of chitin
which was extracted from Agaricus bisporus stipes. The first one gives chitosan 1
with low yield of 2.5%, degree of acetylation (DA) of 4%, molecular weight
(MW) of 2.973 × 105 (g/mol). The second route produces chitosan 2 with higher
yield of 41%, degree of acetylation (DA) of 17.23%, molecular weight (MW) of
2.939 × 105 (g/mol). Both chitosans were characterized by XRD, FTIR, 1
H-NMR
spectroscopy nuclear magnetic resonance of proton. The molecular weight (MW)
was determined by size exclusion chromatography (SEC). Thermal analysis
shows that both chitosans… More >
Login
Register
Submit a Paper
Propose a Special lssue