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  • Open Access

    ARTICLE

    Natural Additive for Reducing Formaldehyde Emissions in Urea-Formaldehyde Resins

    Flávio Pereira1, João Pereira2, Nádia Paiva3, João Ferra3, Jorge Manuel Martins1,4, Fernão D. Magalhães1, and Luísa Carvalho1,4*

    Journal of Renewable Materials, Vol.4, No.1, pp. 41-46, 2016, DOI:10.7569/JRM.2015.634128

    Abstract This work studies the use of soy protein as a natural formaldehyde scavenger in wood particleboard production. The protein is incorporated in two forms: a) as a powder, during the blending process of wood particles with urea-formaldehyde binder resin, and b) as an aqueous solution, added at different times during resin synthesis. Analysis of variance (ANOVA) was used to evaluate the signifi cance level of two effects (amount of added soy and time of addition) on internal bond strength, thickness swelling, and formaldehyde content of the resulting panels. The results showed that soy protein can More >

  • Open Access

    ARTICLE

    Superhydrophobic and Oleophobic UV-Curable Surface Engineering of Cellulose-Based Substrates

    José M. R. C. A. Santos*, Ana R. Sampaio, Joana Branquinho

    Journal of Renewable Materials, Vol.4, No.1, pp. 31-40, 2016, DOI:10.7569/JRM.2015.634123

    Abstract Cellulose-based materials are one of the most widely used materials provided by nature to mankind. In particular, cotton fi bers have been used for millennia to produce clothing items. This wide usage stems from the inherent properties of cotton fabrics such as hydrophilicity and permeability to water vapor. However, increasingly sophisticated uses for cotton-based clothing (e.g., technical textiles) demand specifi c properties such as hydrophobicity and oleophobicity for repellent functions. The current surface treatments used to attain these functionalities are based on thermally initiated polymerization reactions, using water-based formulations. Thus, the current technologies are energy-… More >

  • Open Access

    ARTICLE

    Ultrasound-Assisted Synthesis of Sucrose and Fructooligosaccharides Esters as Bio-Plasticizers

    Dragomir Vassilev1*, Nadezhda Petkova2, Milena Koleva1, Panteley Denev2

    Journal of Renewable Materials, Vol.4, No.1, pp. 24-30, 2016, DOI:10.7569/JRM.2015.634125

    Abstract This article presents the results obtained by the ultrasound-assisted synthesis of sucrose and fructooligosaccharides (FOS) esters with fatty acids (palmitic and 10-undecylenic), the identifi cation of the products and the study of their possible application as plasticizers in plastics processing. Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (1H and 13C NMR) spectroscopy were used to identify the synthesized carbohydrate esters. The plasticizing effect of the sucrose palmitate applied in polyvinyl chloride (PVC) was evaluated by the glass transition temperatures; the decrease of the Tg with the increase of the ester content could be accepted as… More >

  • Open Access

    ARTICLE

    Polymers from Biobased-Monomers: Macroporous Itaconic Xerogels Prepared in Deep Eutectic Solvents

    Szczepan Bednarz*, Angelika Wesołowska, Magdalena Trątnowiecka, Dariusz Bogdał

    Journal of Renewable Materials, Vol.4, No.1, pp. 18-23, 2016, DOI:10.7569/JRM.2015.634131

    Abstract New methods of preparation of crosslinked polymers from itaconic acid as a renewable monomer have been explored. Synthesis of hydrogels and xerogels from the acid in deep eutectic solvents (DESs) are described and some basic properties of the materials are reported. Most importantly, a surfactant-free method of creation of macroporous poly(itaconic-co-bisacrylamide) by phase separation polymerization in binary mixture of the DES and poly(ethylene glycol) is demonstrated. More >

  • Open Access

    ARTICLE

    Preparation of β-Cyclodextrin/Latex Dispersion for Coating of Cellulose Fabric

    Monique de Alvarenga Pinto Cotrim1*, Jessyca Aparecida Paes Dutra2, Suzana Gonçalves Carvalho2, Janaina Cecília Oliveira Villanova2, Eliane Ayres1

    Journal of Renewable Materials, Vol.4, No.1, pp. 9-17, 2016, DOI:10.7569/JRM.2015.634122

    Abstract In recent years there has been an increasing demand for the application of natural products to address problems in the environment. The use of products derived from renewable resources can provide a sustainable strategy to replace totally or partially synthetic products. Cymbopogon, commonly known as lemongrass, is a tropical grass cultivated mostly for its essential oil, which has demonstrated several bioactivities, including antibacterial and antifungal properties. In the present work the formation of inclusion complex between β-cyclodextrin (β-CD) and lemongrass essential oil (LGEO) as well as its fi xation onto cotton fabric were investigated. Inclusion More >

  • Open Access

    ARTICLE

    Influence of the Extraction Temperature on the Properties of Biopolymers Obtained from Tannery Wastes

    M.A. Pérez-Limiñana*, M.M. Sánchez-Navarro, M.J. Escoto-Palacios, F. Arán-Aís, C. Orgilés-Barceló

    Journal of Renewable Materials, Vol.4, No.1, pp. 3-8, 2016, DOI:10.7569/JRM.2015.634119

    Abstract The tanning i ndustry generates very large quantities of industrial wastes. The advancement of European policy and legislation protecting the environment has prompted the transformation of tannery solid waste materials into valuable co-products, useful to be recycled or employed in other industries. The objective of this work is to obtain gelatine from tannery wastes, in order to reuse it as natural microencapsulating agent in the production of active materials with functional properties. Concretely, this paper focuses on the influence of the extraction temperature on gelatine properties and its microencapsulating ability. An alternative enzymatic pre-treatment to More >

  • Open Access

    EDITORIAL

    Editorial

    Filomena Barreiro, Ana Vera Machado

    Journal of Renewable Materials, Vol.4, No.1, pp. 1-1, 2016, DOI:10.7569/JRM.2016.634101

    Abstract a special issue containing 12 papers is presented here.The Guest Editors of this special issue are grateful to Alessandro Gandini, co-editor in-chief of the Journal of Renewable Materials, Linda Mohr, the Journal Editors’ assistant, as well as to the entire journal team for their valuable contributions that made this excellent work possible. Last but not least, our sincere appreciation to the contributing authors for the work performed and to all the reviewers involved, for their critical and con-structive comments on the submitted manuscripts.A special acknowledgement to Martin Scrivener for his constant follow-up and support.We look More >

  • Open Access

    ARTICLE

    Differential Responses of Cultured MC3T3-E1 Cells to Dynamic and Static Stimulated Effect of Microgravity in Cell Morphology, Cytoskeleton Structure and Ca2+ Signaling

    Mingzhi Luo1,2, Peili Yu1, Yang Jin3, Zhili Qian1, Yue Wang1, Jingjing Li1, Peng Shang2*, Linhong Deng1*

    Molecular & Cellular Biomechanics, Vol.13, No.2, pp. 137-157, 2016, DOI:10.3970/mcb.2016.013.155

    Abstract Random positioning machine (RPM) and diamagnetic levitation are two essential ground-based methods used to stimulate the effect of microgravity in space life science research. However, the force fields generated by these two methods are fundamentally different, as RPM generates a dynamic force field acting on the surface in contact with supporting substrate, whereas diamagnetic levitation generates a static force field acting on the whole body volume of the object (e.g. cell). Surprisingly, it is hardly studied whether these two fundamentally different force fields would cause different responses in mammalian cells. Thus we exposed cultured MC3T3-E1… More >

  • Open Access

    ARTICLE

    3D Bio-Plotted Composite Scaffold Made of Collagen Treated Hydroxyapatite-Tricalciumphosphate for Rabbit Tibia Bone Regeneration

    Pranav S. Sapkal1*, Abhaykumar M. Kuthe1, Divya Ganapathy2, Shantanu C. Mathankar3, Sudhanshu Kuthe4

    Molecular & Cellular Biomechanics, Vol.13, No.2, pp. 115-136, 2016, DOI:10.3970/mcb.2016.013.131

    Abstract Biphasic calcium phosphate scaffolds with 20/80 HA/TCP ratio were fabricated using the 3D-Bioplotting system to heal critical size defects in rabbit tibia bone. Four different architectures were printed in a layer by layer fashion with lay down patterns viz. (a) 0°– 90°, (b) 0°– 45°– 90°– 135°, (c) 0°–108°– 216° and (d) 0°– 60°– 120°. After high-temperature sintering scaffolds were coated with collagen and were further characterized by (FTIR) Fourier Transform Infrared Spectroscopy, (SEM) Scanning Electron Microscopy, (XRD) X-Ray diffraction, Porosity analysis and Mechanical testing. Scaffold samples were tested for its ability to induce cytotoxicity… More >

  • Open Access

    ARTICLE

    Development of a Device in Detection of Glaucoma for Rural Eye Care Using Additive Manufacturing and TRIZ

    Mahesh B. Mawale1,*, Abhaykumar Kuthe2, Dr. Padma Pawane3, Sandeep W. Dahake2, Jyotilal S2

    Molecular & Cellular Biomechanics, Vol.13, No.2, pp. 105-114, 2016, DOI:10.3970/mcb.2016.013.119

    Abstract Purpose: The main purpose of this study is to develop a device for the indicative measurement of intraocular pressure (IOP) of eyeball, a key cause for glaucoma. In early diagnosis and treatment of glaucoma accurate measurement of IOP is important. The methods and devices which are available for the measurement of IOP have their own limitations which cause discomfort to the patients during measurement and needs anesthesia. There is a dare need of a device for the measurement of intraocular pressure by making the contact of plunger with closed eyelid eliminating the need of anesthesia… More >

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