Article
Engineering, Chemical
Supparoek Boopasiri, Noottiyaporn Suwantrakrit, Pongdhorn Sae-Oui, Chomsri Siriwong
Summary: Bagasse ash (PBA) has been studied as a filler for natural rubber (NR), showing semi-reinforcing effects due to its large particle size. Adding surface modifying agents such as TESPT and ENR slightly improved mechanical properties of NR vulcanizates filled with PBA.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Polymer Science
Khrongkhwan Yotkuna, Rungsima Chollakup, Tanawat Imboon, Venkatramanan Kannan, Sirikanjana Thongmee
Summary: This study aimed to enhance the mechanical properties and improve flame-retardant properties of natural rubber (NR) composites by utilizing sugarcane bagasse mixed with rubber compound, as well as adding magnesium hydroxide (MH) and aluminum hydroxide (ATH). The results showed that sugarcane bagasse improved the mechanical properties and flame-retardant property of the composites, while the addition of both MH and ATH increased the efficiency of flame retardant. The study also found that the addition of these materials influenced the cure time, scorch time, Mooney viscosities, tensile strength, elongation at break, microhardness, and the modulus at 100% and 300% of the composites.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Materials Science, Characterization & Testing
Takayuki Saito, Masaki Yamano, Kazumi Nakayama, Seiichi Kawahara
Summary: Rubber-state nuclear magnetic resonance (NMR) spectroscopy was used to quantitatively analyze crosslinking junctions and uncrosslinked pendant sulfidic groups in natural rubber (NR) vulcanizates with two different formulations. The resulting NR vulcanizates were characterized to determine crosslink density, number of sulfur atoms at crosslinking junctions, and structure of crosslinking junctions. Signals in rubber-state C-13 and H-1 NMR spectra were assigned to specific groups using two-dimensional NMR spectroscopy, allowing for estimation of the proportion of CH linking to sulfur at the crosslinking junctions.
Article
Polymer Science
Thu Ha Nguyen, Van Chuc Tran, Manh Trung Nguyen, Anh Quan Cao, Thi Thuy Tran
Summary: In this work, a green material based on epoxidized natural rubber and modified cellulose was prepared through an eco-friendly procedure. The structural and performance characteristics of the material were investigated. It was found that the blend of modified cellulose and epoxidized natural rubber exhibited superior mechanical properties, thermal stability, and waterproofing, which could be attributed to the presence of polyacrylonitrile and its enhanced compatibility between the rubber and cellulose phases. The study highlights the potential of this green material for various applications.
Article
Environmental Sciences
Giovanni Barrera Torres, Guilhermi Dognani, Deuber Lincon da Silva Agostini, Renivaldo Jose dos Santos, Flavio Camargo Cabrera, Carlos Mario Gutierrez Aguilar, Fabio Friol Guedes de Paiva, Silvio Rainho Teixeira, Aldo Eloizo Job
Summary: The study demonstrated that the use of a specific coupling agent and curing alternative system can improve the interaction between sugarcane bagasse ash and natural rubber, enhancing the properties of the composite materials. These findings encourage further research to develop new industrial processes for waste reuse.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Materials Science, Composites
Guowei Chen, Azin Adibi, Dylan Jubinville, Tizazu H. Mekonnen
Summary: Epoxidized natural rubber (ENR) bio-composites filled with hemp hurd were fabricated and analyzed for their thermomechanical and physical properties. The reactive mixing of ENR and hemp hurd resulted in epoxy ring opening and ether bonding. Sulfur vulcanization involved both ENR and hemp fillers. The optimized formulation showed significant improvement in hardness, tensile strength, and modulus compared to the ENR baseline.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Textiles
Dalia Saber, Asmaa H. Abdelnaby, Ayman M. Abdelhaleim
Summary: Research on replacing synthetic fibers with natural fibers as reinforcements in thermoplastic composites has grown rapidly in recent years. The main objective is to develop an eco-friendly and cost-effective composite material using sugarcane bagasse as natural fiber and low-density polyethylene as the matrix by injection molding technique. The study explores the impact of sugarcane bagasse content, chemical treatment, and the addition of maleic anhydride coupling agent on the composite's degradation under ultraviolet radiation and thermal conditions. The results show that the addition of maleic anhydride improves the thermal degradation temperature and provides significant resistance to degradation by ultraviolet exposure when compared to unmodified composites. The addition of carbon black particles further enhances the resistance to degradation by ultraviolet exposure.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
R. K. Gond, Tejas Pramod Naik, Manoj Kumar Gupta, Inderdeep Singh
Summary: Nanocellulose was isolated from sugarcane bagasse fibers using a chemo-mechanical method, and bionanocomposites based on PLA were prepared by injection molding with varying weight percentages of nanocellulose. The mechanical, thermal and dynamic mechanical properties, as well as water absorption behavior, of the bionanocomposites were studied. A significant improvement in thermal stability, water resistance, and mechanical performance was observed in the bionanocomposites with 2 wt. % of nanocellulose. The content of nanocellulose had a significant impact on the mechanical properties of the bionanocomposites.
MATERIALS TECHNOLOGY
(2022)
Article
Polymer Science
Xing Tian, Jie Hu, Xin Sun, Yongxin Duan, Min Jiang
Summary: By adding three kinds of Zn-containing Zeolitic Imidazolate Frameworks (Zn-ZIFs) into natural rubber (NR), it was found that ZIF-8 showed the best performance in accelerating vulcanization and improving mechanical properties of NR at lower temperature. The addition of ZIF-8 significantly enhanced the strength and crosslinking density of NR.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Construction & Building Technology
Ana Claudia dos Santos, Flavio Gatti Cardoso, Rodrigo Jose da Silva, Honoria de Fatima Gorulho, Tulio Hallak Panzera
Summary: This study investigates the use of short bagasse fibers to reinforce cement composites and promote recycling of sugarcane residues. The addition of stearic acid and castor oil as fiber modifiers improves the hydrophobic character of the fibers. Experimental design shows that composites with 2 wt% stearic acid-treated fibers achieve optimal mechanical and physical properties. Mechanical responses increase by up to 22.25%, while physical responses reduce by up to 20.46% compared to a reference mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Polymer Science
Yihu Song, Guangxu Wu, Junbiao Peng, Chunsheng Zhang, Dangling Wang, Qiang Zheng
Summary: Rubber processing industries are looking for ecofriendly activators to reduce usages of zinc oxide (ZnO) and emissions of volatile organic compounds. This study investigates the use of low cost deep eutectic solvents (DESs) for regulating vulcanization kinetics and mechanical behaviors of natural rubber (NR) gums. A highly active DES based on choline chloride/thiourea (1/3) pair (CCT) is found to effectively reduce the amount of ZnO activator used and improve the strength of vulcanizates at lower vulcanization temperatures. The crosslinking density and tensile strength of the vulcanizates can be independently regulated by the introduction of DESs and variation of vulcanization temperature, allowing for the customization of elasticity and dissipation properties in an energy-saving vulcanization approach.
Article
Materials Science, Characterization & Testing
Pablo Resende Oliveira, Sergio Luiz Moni Ribeiro Filho, Tulio Hallak Panzera, Andre Luis Christoforo, Luis Miguel Pereira Durao, Fabrizio Scarpa
Summary: The study found that the amount and size of discarded rubber particles have a significant impact on the physical and mechanical properties of the hybrid polymer composite, while the length and treatment of bagasse fibers have a lesser effect on the strength and stiffness of the composite material. The presence of sugarcane bagasse increases the compressive toughness of the hybrid composites.
POLYMERS & POLYMER COMPOSITES
(2021)
Article
Polymer Science
Xin Guo, Zhiyu Ma, Haisong Wang, Yanna Lv
Summary: The novel bio-based packaging film designed with bagasse pith hemicellulose as main substrate materials and PAE as strengthening agent successfully overcomes the wet strength and hydrophilic properties issues of hemicellulose films, improving barrier and strength properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Agricultural Engineering
Chotiwit Sriwong, Suwimon Boonrungsiman, Prakit Sukyai
Summary: Biocomposite cellulose-based scaffolds combined with hydroxyapatite were successfully developed from sugarcane bagasse for tissue engineering. The scaffolds showed appropriate porosity and low degradation rate. Cell viability, proliferation, and differentiation experiments demonstrated that the cellulose combined HA scaffolds promoted the growth and differentiation of bone cells. The results indicated that sugarcane bagasse-derived cellulose is an ideal material for bone scaffolding applications.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Polymer Science
Jingyi Wang, Hongbing Jia
Summary: In this study, a carbon-silica dual-phase filler/natural rubber vulcanizate was prepared using mechanical blending, and the dispersion of the filler in the rubber matrix and its effects on the rubber network structure were investigated.
Article
Materials Science, Biomaterials
Laura Neves de Alencar, Fabio Friol Guedes Paiva, Fernando Sergio Okimoto, Giovani Boaventura Bacarin, Guilherme Dognani, Leandra Oliveira Salmazo, Renivaldo Jose dos Santos, Flavio Camargo Cabrera, Aldo Eloizo Job
Summary: With the development of civil construction and population growth, policies need to be developed for managing and reusing generated residue. This study proposes using expanded natural rubber and eucalyptus filler as a composite material for acoustic insulation. The NR/W-40 foam exhibited enhanced acoustic insulation capacity, with a maximum absorption three times higher than natural rubber foam. The use of wood as a filler in rubber foam shows promise for acoustic insulation.
Article
Biotechnology & Applied Microbiology
Amanda da Costa Gomes, Laura Camargo Zibordi, Filipe Oliveira Granero, Valdecir Farias Ximenes, Nathalia Mariana Pavan, Luciana Pereira Silva, Cibely da Silva Martin Sonvesso, Aldo Eloizo Job, Nilson Nicolau, Regildo Marcio Goncalves da Silva
Summary: Food supplements from plants, such as Tribulus ter-restris, are rich in antioxidants and have the potential to prevent oxidative stress-related damages and diseases. The development of new formulations, including metallic nanoparticles, has enhanced the benefits of these supplements. The characterization of synthesized silver nanoparticles demonstrated their spherical shape and greater protective properties against oxidative stress.
FOOD AND BIOPRODUCTS PROCESSING
(2023)
Article
Physics, Multidisciplinary
Francilio Vieira Aguiar, Daniel Roger Bezerra Amorim, Rafael Marinho Bandeira, Iran da Silva Guimaraes, Aldo Eloizo Job, Deuber Agostini, Maria Leticia Vega, Helder Nunes da Cunha
Summary: In this study, self-standing films composed of polyaniline (PANI) and cashew nut shell liquid (t-CNSL) were characterized using various techniques. The addition of t-CNSL improved the roughness, thermal stability, and conductivity of the films. Chemical interactions between PANI and t-CNSL were observed, and t-CNSL acted as both a plasticizer and a dopant agent in the films. These findings provide an environmentally friendly method for enhancing the conductivity of PANI-based films.
BRAZILIAN JOURNAL OF PHYSICS
(2023)
Article
Construction & Building Technology
Alex Ramos da Silva, Fabio Friol Guedes de Paiva, Lucas Henrique Pereira Silva, Luis Fernando dos Santos, Gabrieli Roefero Tolosa, Aldo Eloizo Job, Adela Perez Galvin, Antonio Lopez-Uceda, Silvio Rainho Teixeira, Angela Kinoshita, Renivaldo Jose dos Santos
Summary: This study aimed to investigate the feasibility of using lubricating oil re-refining ash (LORR) as a pozzolanic material in mortar composites, and to determine the optimal replacement content. The results showed that LORR has high pozzolanic reactivity, contributing to the additional formation of calcium silicate hydrate gel. Up to 30% LORR replacement resulted in similar mechanical properties to the control mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Polymer Science
Carlos Toshiyuki Hiranobe, Gabrieli Roefero Tolosa, Gleyson Tadeu de Almeida Santos, Joao Pedro Jenson de Oliveira, Eduardo Roque Budemberg, Michael Jones da Silva, Flavio Camargo Cabrera, Aldo Eloizo Job, Leonardo Lataro Paim, Giovanni Barrera Torres, Renivaldo Jose dos Santos
Summary: The refrigeration industry generates millions of tons of waste polyurethane (PU) annually, causing environmental and health problems. This study explores the use of waste PU as filler in shoe soles made of styrene butadiene rubber (SBR) and natural rubber (NR). The interfacial interaction of the filler is evaluated using two methods, and the composites are found to have similarities to metallic materials in terms of stress-strain curves and exhibit a strong filler-rubber interaction, as indicated by the Lorenz-Park equation. Scanning Electron Microscopy and Fourier-Transform Infrared Spectroscopy are employed to investigate the morphology of the composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Ceramics
Alessandra M. G. Mutti, Felipe S. M. Canisares, Joao A. O. Santos, Bruno C. Santos, Dalita G. S. M. Cavalcante, Aldo E. Job, Ana M. Pires, Sergio A. M. Lima
Summary: In this study, luminescent nanohybrids were designed by synthesizing silica nanoparticles containing Eu3+-complexes through three different approaches. Among them, the SiO2-[Eu1] hybrid showed the highest quantum efficiency and color purity, and it was found to be non-toxic in cell viability tests. The hybrid was successfully applied as a luminescent stain for cell imaging, showing a specific cell marking pattern near the nucleus. These findings indicate the potential of SiO2-[Eu1] hybrid for bioimaging applications.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Lucas Henrique Pereira Silva, Victor Nehring, Fabio Friol Guedes de Paiva, Jacqueline Roberta Tamashiro, Adela P. Galvin, Antonio Lopez-Uceda, Angela Kinoshita
Summary: In order to reduce the environmental impact of Portland cement manufacturing and increase profits, the industry has been utilizing waste materials, with blast furnace slag being one of the most commonly used. This study reviews recent scientific literature on the use of blast furnace slag in pavements. A total of 20 articles analyzing the effects, chemical composition, and physical properties of blast furnace slag in pavements are selected and summarized. The results show that replacing cement with blast furnace slag can significantly reduce CO2 emissions, save energy, and reduce costs.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Chemistry, Multidisciplinary
Fabio Friol Guedes de Paiva, Luis Fernando dos Santos, Jacqueline Roberta Tamashiro, Lucas Henrique Pereira Silva, Silvio Rainho Teixeira, Adela P. Galvin, Antonio Lopez-Uceda, Angela Kinoshita
Summary: This study investigates the use of waste foundry sand contaminated with phenolic resin (WFPS) as a substitute in mortar. It is found that mortar with WFPS containing low resin content exhibits satisfactory mechanical strength, while the strength of mortar with high resin content is reduced by up to 50%. The leaching of phenolic compounds from WFPS with high resin content exceeds the normative limit by up to 20 times. However, in the long-term, the leaching of phenolic compounds from the monolithic state of mortar remains within the limits, indicating the possibility of recycling the large quantities of waste foundry sand produced globally by the foundry industry.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Agricultural Engineering
Andressa Silva Gomes, Maria Vitoria Guimaraes Leal, Gabrieli Roefero Tolosa, Flavio Camargo Cabrera, Guilherme Dognani, Aldo Eloizo Job
Summary: This study aims to obtain functionalized cellulose (cDAC) by oxidation and cationization using sugarcane bagasse. The cDAC showed a maximum adsorption capacity of 563.30 mg/g for anionic dyes and exhibited good recyclability. Therefore, cDAC has the potential to be a new, clean, low-cost, recyclable, and environmentally friendly alternative for effluent decontamination containing dyes.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Rafael J. G. Rubira, Victor R. G. Batista, Rafael R. Correia, Wallance M. Pazin, Mateus D. Maximino, Gilia C. M. Ruiz, Giovana R. Teixeira, Aldo E. Job
Summary: This study focuses on the impact of widely used sugarcane crop pesticides, Imazapic (IMZ) and Methyl Parathion (MP), on tilapia gill tissues and their lipid membranes. The results reveal the morphological alterations in the lipid bilayer caused by electrostatic interactions between the pesticides and polar head groups of lipids. These alterations can lead to compromised oxygen absorption by fish and subsequent mortality.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Leandra E. Kerche, Iriana M. Carrara, Poliana C. Marinello, Dalita G. S. M. Cavalcante, Caroline S. Danna, Rubens Cecchini, Alessandra L. Cecchini, Aldo E. Job
Summary: This study aimed to investigate the effects of subchronic UVB radiation exposure on mice and the protective role of latex C-serum cream. The results showed that latex C-serum prevented the progression of actinic keratosis to squamous cell carcinoma and protected the skin against oxidative stress damage induced by UVB radiation. These findings suggest that latex C-serum plays an important antioxidant and photoprotective role.
JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH-PART A-CURRENT ISSUES
(2023)
Review
Construction & Building Technology
Lucas Henrique Pereira Silva, Fabio Friol Guedes de Paiva, Jacqueline Roberta Tamashiro, Angela Kinoshita
Summary: Concrete is widely used in construction, but its production has negative environmental impacts due to high CO2 emissions from cement production. Using industrial waste as a supplementary cementitious material (SCM) is being studied to reduce these impacts. This literature review investigated the potential use of bamboo leaf ash (BLA) as a SCM and found that it has high pozzolanic reactivity, leading to composites with improved mechanical properties and durability when replacing cement.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Jacqueline Roberta Tamashiro, Miguel Angel de la Rubia, Fernando Rubio-Marcos, Rocio Estefania Rojas-Hernandez, Lucas Henrique Pereira Silva, Fabio Friol Guedes de Paiva, Angela Kinoshita, Amparo Moragues Terrades
Summary: This study comprehensively explores the impact of ZnO particle morphology on cement hydration. It is found that ZnO nanoparticles can delay the hydration process, while ZnO microparticles can enhance mechanical properties.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Samara S. Araujo, Gleyson T. A. Santos, Gabrieli R. Tolosa, Carlos T. Hiranobe, Eduardo R. Budemberg, Flavio C. Cabrera, Michael J. da Silva, Leonardo L. Paim, Aldo E. Job, Renivaldo J. dos Santos
Summary: The biodiversity of plant resources provides a renewable and sustainable component for various applications. In this study, vegetable waste was used as a filler in polymeric composites, leading to reduced vulcanization time. The resulting biocomposites showed thermal stability and strong matrix/filler interactions, making them a viable and ecological alternative to non-ecological composites.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
Article
Polymer Science
Renan Zunta Raia, Setsuo Iwakiri, Rosilani Trianoski, Alan Sulato de Andrade, Edemir Luiz Kowalski, Aldo Eloizo Job, Fabio Friol Guedes de Paiva
Summary: The objective of this research was to develop a more sustainable composite with the incorporation of fibers treated with NaOH into natural rubber. The mechanical properties of the composites changed, with increased hardness and young's modulus, and decreased tensile strength. However, there were no statistically significant differences in the physical properties. The electrical properties improved with higher fiber concentrations, suggesting a potential use of the wood-rubber composites for rubber artifacts with low rolling resistance. Based on the results, the WF24/CB36 mix was recommended for producing antistatic floors.
POLIMEROS-CIENCIA E TECNOLOGIA
(2023)