Open Access
REVIEW
Verónica L. Mucci1, M. E. Victoria Hormaiztegui2, Mirta I. Aranguren1,*
Journal of Renewable Materials, Vol.8, No.6, pp. 579-601, 2020, DOI:10.32604/jrm.2020.09455
Abstract The increasing pressure from consumers and policy makers to reduce
the use of synthetic polymers, whose production contributes to the depletion of
non-renewable resources and are usually non- biodegradable, has prompted the
efforts to find suitable bio-based sources for the production of polymers. Vegetable oils have been a frequently spotted in this search because they are versatile,
highly available and a low cost liquid biosource, which can be used in the synthesis of a wide plethora of different polymers and reactive monomers. Following
the same idea of reducing the environmental stress, the traditional polyurethanes
that are soluble in organic solvents… More >
Open Access
ARTICLE
Marion Thébault1, Larysa Kutuzova2, Sandra Jury1, Iris Eicher1, Edith-Martha Zikulnig-Rusch1, Andreas Kandelbauer2,*
Journal of Renewable Materials, Vol.8, No.6, pp. 603-630, 2020, DOI:10.32604/jrm.2020.09616
(This article belongs to this Special Issue: Renewable and Biosourced Adhesives)
Abstract Here, the effects of substituting portions of fossil-based phenol in phenol formaldehyde resin by renewable lignin from two different sources are investigated using a factorial screening experimental design. Among the resins
consumed by the wood-based industry, phenolics are one of the most important
types used for impregnation, coating or gluing purposes. They are prepared by
condensing phenol with formaldehyde (PF). One major use of PF is as matrix
polymer for decorative laminates in exterior cladding and wet-room applications.
Important requirements for such PFs are favorable flow properties (low viscosity),
rapid curing behavior (high reactivity) and sufficient self-adhesion capacity (high
residual… More >
Open Access
ARTICLE
Xing Zhou1,*, Xin Zhang1, Dong Wang1, Changqing Fang1,*, Wanqing Lei1, Zhigang Huang2, Yonghua Song1, Xinyu He1, Yingwei Huang1
Journal of Renewable Materials, Vol.8, No.6, pp. 631-645, 2020, DOI:10.32604/jrm.2020.010176
Abstract Cellulose plays a key role in abundant organic natural materials meeting the increasing demand for green and biocompatible products. The highly crystalline nanoscale component of cellulose nanocrystals has recently attracted great
attention due to the versatile performance as filler or matrix in producing functional materials. In this work, we prepared the waterborne polyurethane via a prepolymer process, and obtained cellulose and cellulose nanocrystals from waste
paper via a facile acid hydrolysis process. After that, the cellulose nanocrystals
were assembled into film and mixed with polyurethane to prepare flexible polyurethane/cellulose nanocrystals composite membrane with different soaking time.
The correlation between the… More >
Open Access
ARTICLE
N. S. B. Yusof1,2, S. M. Sapuan1,3,*, M. T. H. Sultan1,4, M. Jawaid1
Journal of Renewable Materials, Vol.8, No.6, pp. 647-660, 2020, DOI:10.32604/jrm.2020.08309
Abstract In this study, the best manufacturing process will be selected to build an
automotive crash box using green oil palm natural fibre-reinforced polyurethane
composite materials. This paper introduces an approach consist of technical
aspects (T), the economic point of view (E) and availability (A), and it’s also
called as TEA requirement. This approach was developed with the goal of assisting the design engineer in the selection of the best manufacturing process during
the design phase at the criteria selection stage. In this study, the TEA requirement
will integrate with the analytical hierarchy process (AHP) to assist decision
makers or manufacturing… More >
Open Access
ARTICLE
Nikolajs Vedernikovs*
Journal of Renewable Materials, Vol.8, No.6, pp. 661-674, 2020, DOI:10.32604/jrm.2020.09274
(This article belongs to this Special Issue: The 10th Conference on Green Chemistry and Nanotechnologies in Polymeric Materials (GCNPM 2019))
Abstract The main principles of the technological realisation of the furfural
obtaining process have been formulated by Ricard [1]. Based on his recommendations, all investigators proceeded from the assumption that the depolymerisation
of pentosans and the dehydration of pentoses in the one-step production of furfural from raw plant material must be accelerated with diluted catalyst solutions.
According to this theory, uniform impregnation of the raw material with a catalyst
solution is considered necessary. The reduction in the amount of the catalyst solution down to 30–40% of the mass of the dry raw material, suggested by Miner
et al. [2], made the… More >
Open Access
ARTICLE
Dragomir Vassilev1,*, Nadezhda Petkova2, Yulian Tumbarski3, Milena Koleva1, Panteley Denev2
Journal of Renewable Materials, Vol.8, No.6, pp. 675-686, 2020, DOI:10.32604/jrm.2020.09279
(This article belongs to this Special Issue: The 10th Conference on Green Chemistry and Nanotechnologies in Polymeric Materials (GCNPM 2019))
Abstract Undenicylic acid (10:1) is known as an antifungal agent and an active
ingredient of many topical medicines [1–6]. The present research investigates the preparation of aliphatic esters of 10-undecylic acid with butanol and i-amyl alcohol by
the conventional and ultrasound-assisted syntheses as well as the structural elucidation of the resulting compounds, by FTIR and NMR spectroscopy. The antimicrobial
properties of the obtained 10-undecylenic esters were tested against Gram-positive
bacteria (Staphylococcus aureus; Enterococcus faecalis; Listeria monocytogenes),
Gram-negative bacteria (Escherichia coli; Salmonella sp.) and filamentous fungi
(Penicillium sp.; Aspergillus niger; Fusarium moniliforme) using the conventional
agar-well diffusion assay. The results demonstrated that… More >
Open Access
ARTICLE
Jialiang Zhang1, Zhenwen Zhang2, Keting Tong1, Jianmin Wang2, Yushun Li3,*
Journal of Renewable Materials, Vol.8, No.6, pp. 687-702, 2020, DOI:10.32604/jrm.2020.09513
(This article belongs to this Special Issue: Bio-composite Materials and Structures)
Abstract The steel-bamboo composite structure is a newly developed structure,
combining phyllostachys pubescens (also called Moso bamboo) plywood and
cold-formed thin-walled steel with structural adhesive. The reliability of steelbamboo interface is the premise of composite effect. 13 specimens were prepared
to investigate the failure modes and mechanism of the steel-bamboo interface on
the basis of push-out test, and the strain difference analysis method was proposed
to study the distribution of shear stress. The results show that the main failure
modes of steel-bamboo interface are adhesion failure and splitting of bamboo plywood. The shear stress is not evenly distributed along the longitudinal… More >
Open Access
ARTICLE
Lixia Gao1, Sheng Shi1,2,*, Wensheng Hou1, Shuhua Wang1, Zhifeng Yan1, Chao Ge1
Journal of Renewable Materials, Vol.8, No.6, pp. 703-713, 2020, DOI:10.32604/jrm.2020.09055
(This article belongs to this Special Issue: Renewable materials for sustainable development)
Abstract In this study, waste cotton fabric was used as cellulose raw material and
pretreated in aqueous NaOH/urea solution system to investigate the effect of
NaOH/urea pretreatment solution on the hydrolysis of cotton fiber. The cotton
fiber was pretreated with different conditions of aqueous NaOH/urea solution,
and the pretreated cotton fiber was hydrolyzed under the same conditions as
the original cotton fiber. The results of characterization analysis showed that water
retention value of pretreated cotton fiber was higher than that of unpretreated sample. Moreover, the cotton fiber presented both a convoluted structure and a coarser
surface, XRD results suggested that the… More >