Article
Engineering, Environmental
Wutang Sang, Shuzhen Cui, Xiangbing Wang, Bei Liu, Xiaoxia Li, Kanjun Sun, Hui Peng, Guofu Ma
Summary: This study successfully synthesized a multifunctional superabsorbent composite (SACs) by grafting acrylic acid (AA) onto polyaspartic acid (PASP), waste paper fibers (WPF), and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS). The optimized synthesis conditions resulted in SACs with improved water retention, salt and acid resistance, reversible swelling, and temperature sensitivity. The SACs exhibited a maximum equilibrium adsorption capacity in distilled water, tap water, and NaCl solution, showing great potential for sustainable agriculture and desertification control.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Textiles
Marina Gil Almeida Cioffi, Daniel Magalhaes de Oliveira, Anne Shayene Campos de Bomfim, Kelly Cristina Coelho de Carvalho Benini, Maria Odila Hilario Cioffi, Herman Jacobus Cornelis Voorwald
Summary: The high production of paper has led to an increased focus on paper recycling and its use as a composite filler. This study explores the mechanical and thermal properties of polypropylene composites with different amounts of recycled office waste paper. The results show that the composites maintain comparable properties to pure polypropylene, making them suitable for future applications in various plastic products.
JOURNAL OF NATURAL FIBERS
(2022)
Review
Materials Science, Textiles
Muhammad Rizal Muhammad Asyraf, Agusril Syamsir, Mohamad Ridzwan Ishak, Salit Mohd Sapuan, Norizan Mohd Nurazzi, Mohd Nor Faiz Norrrahim, Rushdan Ahmad Ilyas, Tabrej Khan, Mohamad Zakir Abd Rashid
Summary: Sustainability is a global concern as synthetic materials, particularly petroleum, are being heavily reduced. Many sectors and researchers are now focusing on using lignocellulosic fibers from biomass wastes as a substitute for synthetic fibers and reinforcing bio-based polymer composites. The shift towards green composites is due to their availability, low carbon emissions, and biodegradability. However, research has found that there is still a lack of suitable matches for the unique material attributes of green composites.
FIBERS AND POLYMERS
(2023)
Article
Automation & Control Systems
Hala Bensalah, Marya Raji, Hind Abdellaoui, Hamid Essabir, Rachid Bouhfid, Abou el Kacem Qaiss
Summary: The study focuses on expanding the use of coir fibers by turning them into eco-composites and analyzing the mechanical properties of the composites with treated coir fibers. The results show stabilized flexural stress values and improved ductile behavior, but changes in rheological properties were observed with temperature and fiber loading increasing.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Composites
Sophie Morin, Lionel Dumoulin, Louise Delahaye, Nicolas Jacquet, Aurore Richel
Summary: Multivariate analyses were conducted on nonwoven and nonoriented natural fibers reinforced thermoplastic starch composites, revealing that fibers composition had the most significant impact on elastic modulus and tensile strength, while TPS plasticizers, temperature, and rotor speed negatively affected the elastic modulus to a lesser extent. Complex interactions within TPS-based biocomposites were discussed, with a list of essential variables suggested for comparable analyses of new TPS-based biocomposites using natural fibers as reinforcement.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Composites
Mallampati Somaiah Chowdary, Gujjala Raghavendra, M. S. R. Niranjan Kumar, Shakuntala Ojha, Manne Anupama Ammulu, P. Phani Prasanthi
Summary: Hybrid composites with Kevlar/K, Sisal/S, and Polyester reinforcement, enhanced with varying percentages of Nano clay, demonstrated excellent mechanical properties and erosion wear resistance, particularly suitable for engineering materials in the aviation and automobile industry.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Siew Sand Chee, Mohammad Jawaid, Othman Y. Alothman, Hassan Fouad
Summary: The study investigates the mechanical and dynamic mechanical properties of hybrid natural fiber composites filled with nanoclay, with a focus on the effects of OMMT on enhancing the strength and storage modulus of the composites. The addition of OMMT results in improved mechanical properties and reduced voids and fiber pull-out in the composites.
Article
Materials Science, Composites
Vishnu Unnikrishnan, Omid Zabihi, Quanxiang Li, Mojtaba Ahmadi, Mahmoud Reza Ghandehari Ferdowsi, Thathsarani Kannangara, Patrick Blanchard, Alper Kiziltas, Paul Joseph, Minoo Naebe
Summary: This study introduces a cost-effective approach for the fabrication of multifunctional PA6 thermoplastic composites using waste glass fiber, green aluminium metal organic framework, and industry-grade graphene nanoplatelets. The hybrid filler of Al-MOF and GNPs has a synergistic effect in improving the mechanical properties and fire retardancy of GF reinforced PA6 composites. The composites demonstrated significant improvements in tensile and flexural strength, as well as thermal stability and fire retardancy.
POLYMER COMPOSITES
(2022)
Article
Chemistry, Physical
Anurag Pisupati, Mylene Deleglise Lagardere
Summary: This research highlights the potential of utilizing waste glass fibers for semi-structural applications, demonstrating the positive effects on the properties of random flax fiber composites. The addition of waste glass fibers increased the flexural and impact properties of the composites, while maintaining eco-friendliness.
Article
Materials Science, Textiles
M. Z. De Pellegrin, J. Acordi, O. R. K. Montedo
Summary: This study evaluated the effect of cellulose fiber addition on the mechanical properties of fiber-reinforced mortar composites and found that the addition of cellulose fiber can increase the flexural strength of the composites, with a significant increase in modulus of elasticity due to the good cellulose fiber/cement interface.
JOURNAL OF NATURAL FIBERS
(2021)
Article
Polymer Science
Shohel Siddique, Adam Novak, Emin Guliyev, Kyari Yates, Pak Sing Leung, James Njuguna
Summary: This study investigates the use of drilling waste as filler in polymer composites. The results suggest that incorporating oil-based mud (OBM) clay in slurry form in the low-density polyethylene (LDPE) matrix can significantly decrease the thermal stability and mechanical properties of the composite material. It is hypothesized that the poor Van der Waals force between the polymer molecules/clay platelets and the applied force is the main reason behind the deterioration in mechanical properties.
Article
Materials Science, Composites
Mikhail V. Burkov, Alexander V. Eremin
Summary: This study investigated the effects of adding milled carbon fibers and single-wall carbon nanotubes on the mechanical and physical properties of carbon-fiber-reinforced polymers. It was found that single-wall carbon nanotubes significantly improved static strength and fatigue performance, while milled carbon fibers enhanced properties under static loading but negatively impacted fatigue properties.
POLYMER COMPOSITES
(2021)
Article
Chemistry, Applied
Fugang Hu, Jinsong Zeng, Zheng Cheng, Xiaojun Wang, Bin Wang, Zhanting Zeng, Kefu Chen
Summary: The morphology and length of cellulose nanofibers (CNFs) have a significant impact on their reinforcement effect in recycled paper, with higher aspect ratios leading to better reinforcement. CNFs produced by microfluidic homogenization and suitable PFI milling conditions showed the best reinforced effect, improving tensile index and burst index significantly. This study aimed to investigate the influence of CNFs on reinforcing recycled fibers.
CARBOHYDRATE POLYMERS
(2021)
Article
Materials Science, Composites
Markus Schwaiger, Florian Roeper (Roeper), Markus Wolfahrt, Johannes Taesler, Heiko Schirmer, Moritz Salzmann, Michael Feuchter, Katharina Resch-Fauster
Summary: In this study, the tensile behavior of a flexible epoxy resin reinforced with knitted reinforcements from various fiber materials was comprehensively investigated. The results showed that the knitted structure had a significant impact on the deformation behavior of the flexible composites, with high local strain differences observed in the course direction. In the wale direction, the knitted structure led to plastic deformation of the matrix material. Yarns from recycled thermoplastic fibers exhibited higher maximum stress and strain at break compared to bio-based fibers, but irreversible damage occurred for all fiber materials at similar strain values.
POLYMER COMPOSITES
(2023)
Article
Construction & Building Technology
Basim Abu-Jdayil, Mohamed Saeed Barkhad, Abdel-Hamid I. Mourad, Muhammad Z. Iqbal
Summary: The development of a green polymer composite made of date palm wood powder and polylactic acid as an insulating material shows promising results in terms of thermal stability and mechanical strength. By adding date palm wood powder to the PLA matrix, the composite exhibits low thermal conductivity, thermal diffusivity, and water absorption, while maintaining high compressive strength. Recycling of date palm wood powder waste for green thermal insulation materials is beneficial for the economy and the environment.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Materials Science, Biomaterials
Manuela Maria de Sousa Messeder, Diego Miranda, Sarah Oliveira Lamas de Souza, Matheus Dorneles, Rodolfo Giunchetti, Rodrigo Lambert Orefice
Summary: The use of positively charged PCL nanoparticles to encapsulate AMB for the treatment of leishmaniasis is effective, as it can enhance drug encapsulation efficiency and reduce cytotoxicity to cells.
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS AND POLYMERIC BIOMATERIALS
(2021)
Article
Polymer Science
Erica Correia Duarte, Rodrigo Lambert Orefice
Summary: By incorporating carbon quantum dots onto the surface of carbon fibers, modified composites were able to restore original properties after being damaged. Chemical interactions between CDs and PMMA allowed for repair of damages related to fiber-polymer matrix interfacial detachments.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Monique Cotrim, Rodrigo Orefice
Summary: Carbon quantum dots (CDs) synthesized from silk by a microwave-assisted method were incorporated into PCL/silk matrix to create fluorescent nanofiber yarns. The inclusion of CDs not only imparted fluorescence to the yarns, but also led to a decrease in fiber diameter, an increase in strength, and good biocompatibility. These yarns have the potential for multifunctional applications in biotextiles, such as antiviral, antibacterial, and biosensing capabilities.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Polymer Science
Giovanni Savini, Rodrigo L. Orefice
Summary: Binary and ternary systems of HDPE/EVA with amorphous nanotalc were prepared and studied for their thermal stability and morphological changes. The addition of nanotalc improved the thermal stability and refined the morphology of the EVA phase within the polymer matrix. The dynamic mechanical properties showed an increase in storage modulus with the addition of nanotalc, with the 50EVA/NTA nanocomposite displaying super ductility and high damping capacity.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Engineering, Chemical
Philipe A. P. Silva, Aline Bruna da Silva, Cynthia D'. Avila Carvalho Erbetta, Joao Paulo Ferreira Santos, Ricardo Geraldo de Sousa, Rodrigo Lambert Orefice
Summary: Ionomers were utilized in this study to enhance the adhesion between 3D printed layers of PETG, a commonly used polymer in 3D printing. The addition of ionomers improved the toughness and adhesion of 3D printed samples, with the 30/70 and 50/50 blends performing the best in terms of printability.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Materials Science, Biomaterials
Gabriella Onila do Nascimento Soares, Flavia Alves Lima, Gisele Assis Castro Goulart, Rodrigo Lambert Orefice
Summary: The study demonstrated that gelatin/polycaprolactone electrospun nanofibers loaded with DP have potential applications in improving drug release profiles and reducing adverse reactions such as gastrointestinal discomfort in patients.
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS AND POLYMERIC BIOMATERIALS
(2022)
Article
Biotechnology & Applied Microbiology
Flavia A. Lima, Raquel V. R. Vilela, Rodrigo L. Orefice, Izabela R. Silva, Eduardo C. O. Reis, Larissa A. C. Carvalho, Silvya S. Maria-Engler, Lucas A. M. Ferreira, Gisele A. C. Goulart
Summary: The study aimed to enhance the safety profile of tretinoin (TRE) by encapsulating it in nanostructured lipid carriers (NLC). NLC-TRE demonstrated spherical structures, with an average particle size of 130 nm, zeta potential of 24 mV, and encapsulation efficiency of 98%. Compared to the marketed product, NLC-TRE showed improved epidermal targeting and protection against oxidation, leading to a higher safety profile in in vitro studies and in healthy volunteers.
Article
Polymer Science
Sarah O. L. Souza, Sergio M. de Oliveira, Luciana M. Silva, Rodrigo L. Orefice
Summary: Photopolymerizable hydrogels based on methacryloyl gelatin (GeIMA) with enhanced mechanical properties and biological activity were prepared by incorporating mats of electrospun polycaprolactone fibers containing GeIMA in GelMA hydrogels. The results showed that the fiber mats within the hydrogels could enhance the biological activity of the materials, thus expanding the usage of biomolecule-based hydrogels in biomedical applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Applied
Geanne Aparecida de Paula, Nubya Nascimento Costa, Thais Martins da Silva, Kamila Areas Bastos, Mariana Drummond Costa Ignacchiti, Juliana Aparecida Severi, Rodrigo Lambert Orefice, Lilian Gasparelli Carreira, Janaina Cecilia Oliveira Villanova, Juliana Alves Resende
Summary: Polymeric films containing pomegranate peel extract show promising potential as a drug-delivery platform for topical treatment of candidiasis, as they exhibit adequate mechanical properties and antifungal activity against various Candida species.
NATURAL PRODUCT RESEARCH
(2023)
Article
Polymer Science
Diego Oliveira Miranda, Matheus Figueiredo Dorneles, Rodrigo Lambert Orefice
Summary: In this study, the idea of synthesizing conjugated polymers (polyaniline, PANI) within the core of a core-shell submicron electrospun fiber was tested. The shell of the fiber was prepared through photopolymerization during electrospinning, while the core was produced from an aniline-rich solution. Polymerization of aniline occurred during electrospinning, leading to the formation of highly doped and conductive emeraldine PANI. The ability of the fiber shell to swell in water and create materials with low elastic modulus, similar to hydrogels, was also observed.
POLYMER INTERNATIONAL
(2023)
Article
Polymer Science
Monique Cotrim, Rodrigo Orefice
Summary: In recent years, the use of polycaprolactone/silk (PCL/S) blend micro/nanofibers for biomaterial applications has been explored due to their beneficial combination of biodegradability, biocompatibility, and bioactivity. However, the conventional form of these fibers (mats) has limited use due to poor mechanical properties. To overcome this issue, nanofiber yarns (NF-Ys) have been fabricated, combining the advantages of nanofibers with superior mechanical properties. This paper investigates the production of PCL/S NF-Ys by electrospinning and explores the effect of composition and processing parameters on the morphology, tensile properties, and processability of these nanofibers.
Article
Polymer Science
Sarah Oliveira Lamas de Souza, Sergio Mendes de Oliveira, Catarina Paschoalini Lehman, Merces Coelho da Silva, Luciana Maria Silva, Rodrigo Lambert Orelice
Summary: Tumor organoids have great potential as a 3D in vitro system to model cancer. Gelatin hydrogels with different levels of methacrylation and with cellulose nanocrystals (NCC) or reduced graphene oxide (rGO) were prepared and used to encapsulate human colon carcinoma cells (RKO). Results showed that NCC provided higher mechanical stability to the hydrogels and that GelMA with higher crosslink densities and NCC had higher cell population.
POLIMEROS-CIENCIA E TECNOLOGIA
(2023)
Article
Chemistry, Multidisciplinary
Giuliano S. Martins, Ana Maria M. Batista, Juliano C. de Siqueira, Luciene A. B. Siniscalchici, Rodrigo L. Orefice
Summary: This study investigated the effects of different concentrations and types of polymer flocculants on the flocculation mechanism of kaolinite-rich mining tailings. The results showed that the flocculation process is directly influenced by the pH of the medium, the isoelectric point of the kaolinite, and the molecular mass of the polymer chains. Aggregation of particles in the acrylamide samples occurred through electrostatic interaction, while in the other samples, it occurred through bridging. Additionally, the grafted acrylamide on the chitosan chain was found to improve the flocculation of kaolin waste.
Article
Materials Science, Multidisciplinary
Matheus Figueiredo Dorneles, Andre Fioravante de Oliveira, Pedro Paiva Brito, Augusta Cerceau Isaac Neta, Rodrigo Lambert Orefice
Summary: SEBS-MA was used as a template to guide the incorporation of aluminosilicate nanoparticles, leading to hybrids with enhanced properties for wearables. Stretching during in situ SAXS analysis showed severe damage to the lamellar phase, with high contents of NPs resulting in coarse particles ejected from the BCP lamellar structure.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Medicinal
H. S. Tavares, J. F. Cardoso, T. C. Almeida, M. B. F. Marques, W. N. Mussel, M. C. P. Lopes, R. L. Orefice, S. N. Andrade, F. P. Varotti, G. N. Silva, G. R. Da Silva
Summary: A study developed spiramycin-loaded PLGA implants for the treatment of ocular toxoplasmosis, demonstrating good ocular biocompatibility and in vitro efficacy against Toxoplasma gondii.
