Article
Chemistry, Physical
Rhaul P. Silva, Alisson G. B. Gois, Michele O. Ramme, Tereza N. Castro Dantas, Jennys L. M. Barillas, Vanessa C. Santanna
Summary: This study determined the optimal palygorskite content for achieving organophilization using the cationic surfactant CTAB at various concentrations. The effects of time, temperature, pH, and thermodynamic characteristics on adsorption were studied, and the experimental data fitted well to the Freundlich model. The Dubinin-Radushkevich and Tempkin isotherms confirmed the chemical adsorption of CTAB on Plg clay.
Article
Chemistry, Physical
Sheng Wang, Yan Wang, Yin Liu, Tianshu Zhang, Ling Bing Kong
Summary: Clay minerals were effectively used to prevent aggregation of molybdenum disulfide nanosheets prepared with hydrothermal process, resulting in enhanced microwave absorption performance in the composites. Optimizing the content of clay minerals can further improve the absorption capabilities of the nanocomposites. The hierarchically structured clay mineral/molybdenum disulfide nanocomposites show potential as microwave absorbers for practical applications, with minimal reflection loss achieved at thin thickness.
APPLIED CLAY SCIENCE
(2021)
Article
Energy & Fuels
Ning Zhang, Haijun Guo, Lian Xiong, Hairong Zhang, Xinde Chen
Summary: This study utilized a novel pretreatment method to prepare paraffin/palygorskite shape-stable composite phase change materials, demonstrating great potential for application.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Engineering, Environmental
Changping Zhang, Xiang Wang, Xiaoou Wang, Bowei Liu
Summary: In this study, lanthanum-magnesium modified palygorskite (LMPA) was prepared via co-precipitation and heat treatment and showed excellent adsorption capacity for phosphate and good reusability. The adsorption process was influenced by pH, temperature, and anions, and mainly occurred through surface complexation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Yan Wang, Yu Zhuang, Sheng Wang, Yin Liu, Lingbing Kong, Jianjun Li, Huayong Chen
Summary: The effects of the dose of activator and activation temperature on the crystal structure, morphology, specific surface area, and adsorption performance of palygorskite/carbon composites were systematically studied. The activated composites showed a larger specific surface area and pore volume, as well as higher methylene blue adsorption capacity under optimized conditions.
CLAYS AND CLAY MINERALS
(2022)
Article
Engineering, Chemical
Hong Zhang, Wenbo Wang, Xiaowen Wang, Jiang Xu, Yushen Lu, Aiqin Wang
Summary: The study showed that modifying MDP with KH570 can enhance its compatibility with PP, leading to improved flexural strength and thermal stability of PP, as well as better crystallinity and processing properties. This provides a new effective strategy for utilizing abundant natural PALC in enhancing polymer materials.
Article
Chemistry, Physical
Qian Zhang, Hong Zhang, Junjie Ding, Aiping Hui, Xinyue Liu, Aiqin Wang
Summary: Chitosan/palygorskite/glycyrrhizic acid nanocomposite films were successfully prepared and their properties were investigated. The films exhibited excellent physical, mechanical, antibacterial activity, and hemocompatibility, making them suitable for use as wound dressings.
APPLIED CLAY SCIENCE
(2022)
Article
Engineering, Chemical
Wenbo Wang, Wenting Zhao, Huan Zhang, Jiang Xu, Li Zong, Yuru Kang, Aiqin Wang
Summary: The synthesis of mesoporous polymetallic silicate adsorbents with superior adsorption capability towards methylene blue and tetracycline was achieved through a simple one-pot reaction process. The adsorbent showed rapid adsorption and removal of harmful substances from the solution, thanks to its strong adsorption ability.
Article
Chemistry, Physical
Lyghia Maria Araujo Meirelles, Raquel de Melo Barbosa, Rita Sanchez-Espejo, Fatima Garcia-Villen, Luana Perioli, Cesar Viseras, Tulio Flavio Accioly de Lima e Moura, Fernanda Nervo Raffin
Summary: This study analyzes the chemical and mineral composition of raw Brazilian palygorskite and compares it with a commercial sample. The results indicate that the Brazilian palygorskite has high purity, accurate chemical composition, large specific surface area, and meets the requirements of pharmacopeial specifications, making it a promising ingredient for pharmaceutical and cosmetic production.
Article
Polymer Science
Iuliana Spiridon, Cristian-Dragos Varganici, Ana-Maria Resmerita, Tudor Mihai Simionescu
Summary: Novel formulations containing Arbofill, two flame retardants, and clay were prepared through melt blending. The addition of fillers was found to increase the impact strength of the Arbofill matrix, and the presence of clay improved the interfacial adhesion between the components. The fillers also contributed to enhanced thermal stability and flame resistance of the composites. Therefore, these developed formulations show promising applications in the electrical and furniture industry.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2022)
Article
Engineering, Chemical
Yan Zhao, Yaping Wang, Fei Wang, Junping Meng, Hong Zhang, Jinsheng Liang
Summary: In this study, Pal-Mt materials were regulated through a hydrothermal process, resulting in improved adsorption capacity and removal rate for aflatoxin B-1. This provides a promising new material for addressing mycotoxin contamination issues.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Textiles
Adel Elamri, Mohamed Hamdaoui, Omar Harzallah
Summary: The study investigated the influence of organo-modified clay on the morphology and dyeability of waste polypropylene filaments, with a focus on improved dye affinity for various types of dyes, especially disperse dyes. The prepared filaments were used to create a filter for treating textile dye waste water, with a 3D geometrical design realized using SolidWorks mechanical design software.
FIBERS AND POLYMERS
(2021)
Article
Acoustics
Jiang Xu, Wenbo Wang, Yushen Lu, Hong Zhang, Yuru Kang, Bin Mu, Ye Qian, Aiqin Wang
Summary: This study developed an energy-efficient, scale-up ultrasonic process to disaggregate palygorskite aggregates into individual nanorods. The effects of ultrasonic treatment time, temperature, and power on the physicochemical features of palygorskite were investigated. The results showed that ultrasound treatment at specific conditions could continuously produce dispersed palygorskite nanorods while retaining their original characteristics. The disaggregated palygorskite exhibited improved dispersion, specific surface area, and suspension stability, making it a potential viscosity enhancer for drilling fluid.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Chemistry, Physical
Victor Poussardin, Michael Paris, William Wilson, Arezki Tagnit-Hamou, Dimitri Deneele
Summary: This study focuses on the hydration reactivity of a calcined marlstone material, and the results indicate that it exhibits high self-reactivity, making it a promising Supplementary Cementitious Material (SCM).
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Physical
Rui Jiang, Zepeng Zhang, Huiwen Chen, Yinfeng Yu
Summary: The use of HCl and H2O2 modification methods on palygorskite can help Fe3O4 nanoparticles grow uniformly on nanorods, while alkali treatment has the opposite effect. Fe3O4 nanoparticles can be uniformly attached to the modified-palygorskite surface when the HCl concentration is 2.0 mol/L.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Agriculture, Dairy & Animal Science
Luciana V. V. Diogenes, Ricardo L. L. Edvan, Elisama dos S. Medeiros, Jose M. Pereira Filho, Juliana P. F. de Oliveira, Edson C. C. Silva Filho, Layse M. G. Ramos, Kevily H. de O. S. de Lucena, Marcos J. J. Araujo, Ronaldo L. L. Oliveira, Elzania S. S. Pereira, Leilson R. R. Bezerra
Summary: Corn is an important grain used in animal feeding, and corn-grain silage with mucilage additive showed better animal performance and conservation than ground corn. The replacement of dry ground corn with rehydrated corn-grain silage with mucilage improved the growth and fatty acid profile of goat kids' meat. The NDF intake and cooking losses of goat kids were affected by different moisture additives. The enzymatic activities of Delta(9)desaturase and elongase were also influenced by the different diets fed to the goats.
Article
Water Resources
Josy A. Osajima, Alexandro S. Sa, Rodrigo P. Feitosa, Marcelo B. Furtini, Luzia M. C. Honorio, Maria G. Fonseca, Pollyana Trigueiro, Paula Caregnato, Eduardo R. Triboni, Edson C. Silva-Filho
Summary: Environmental remediation is a field that addresses environmental challenges through various treatment methods, with heterogeneous photocatalysis being a widely studied advanced oxidative process. Organic pollutant pollution globally poses risks to environmental and public health, as well as scientific knowledge that can improve quality of life sustainably. ZnO systems, with their attractive characteristics and good environmental remediation capabilities, have garnered special attention. This review focuses on recent advances in zinc-based photocatalysts for treating contaminated water and their application in environmental remediation.
SUSTAINABLE WATER RESOURCES MANAGEMENT
(2023)
Article
Engineering, Biomedical
Danielle B. B. Andrade, Leticya L. S. Soares, Francisca L. A. Cardoso, Idglan S. S. Lima, Jhaemely G. V. Silva, Maria A. M. Carvalho, Maria G. G. Fonseca, Guilherme de C. Brito, Francisco Eroni P. Santos, Josy A. A. Osajima, Anderson O. O. Lobo, Edson C. C. Silva-Filho
Summary: A nanocomposite hydrogel, synthesized with GelMA and Lap, has potential application in osteogenesis. The hydrogel showed interactions between GelMA and methacrylate anhydride, as evidenced by Fourier-transform infrared spectra. X-ray diffraction patterns confirmed the presence of Lap and GelMA in the hydrogel. The hydrogel exhibited suitable viscosity for injectability, demonstrated low acute toxicity, supported cell viability, and promoted the differentiation of stem cells into osteogenic cells, indicating its potential for osteogenic induction and bone tissue engineering.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Antonia Carla de Jesus Oliveira, Emilliany Barbara Silva, Thaisa Cardoso de Oliveira, Fabio de Oliveira Silva Ribeiro, Daniella Nadvorny, Johny Wysllas de Freitas Oliveira, Ana Borrego-Sanchez, Klinger Antonio da Franca Rodrigues, Marcelo Sousa Silva, Pedro Jose Rolim-Neto, Cesar Viseras, Edson C. Silva-Filho, Durcilene Alves da Silva, Luise Lopes Chaves, Monica Felts de La Roca Soares, Jose Lamartine Soares-Sobrinho
Summary: Nanotechnology has led to new and creative applications of nano-medicine, and polymeric nanoparticles have become increasingly important in pharmaceutical applications. This study investigated the use of cashew phthalate gum (PCG) as a particle-forming polymer, which showed pH-sensitive behavior and control over drug release. The developed nanoparticles carrying benznidazole exhibited enhanced biological activity, reduced cytotoxicity, high anti-T. cruzi performance, and pH-responsive release.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Multidisciplinary
Adriano S. S. Soares, Francisca P. P. Araujo, Robson Franca, Josy A. A. Osajima, Yuset Guerra, Samuel Castro-Lopes, Edson C. C. Silva-Filho, Francisco E. E. Santos, Luciano C. C. Almeida, Bartolomeu C. C. Viana, Ramon R. Pena-Garcia
Summary: In this study, Co-doped ZnO structures were synthesized using the co-precipitation method, and the influence of pH on their structural, optical, morphological properties, and photocatalytic response towards ibuprofen was investigated. It was found that the growth of ZnO structures was affected by the pH, and the substitution of Co2+ ions in the host lattice led to an increase in lattice constants. The samples synthesized at pH = 7 exhibited spherical nanoparticles that self-assembled into hexagonal disk-like structures, while nanorods were observed for samples synthesized at pH = 10 and 13. Photoluminescence spectra analysis revealed the presence of structural defects, mainly single and doubly ionized oxygen vacancies, which, together with pH and dopant, contributed to variations in the optical band gap. Lastly, the photocatalytic response towards Ibuprofen under UV irradiation was enhanced in the presence of H2O2, suggesting improved photocatalytic properties of Co-doped ZnO under optimized conditions.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Chemistry, Physical
Heldeney Rodrigues Sousa, Idglan Sa Lima, Lucas Matheus Lima Neris, Albert Santos Silva, Ariane Maria Silva Santos Nascimento, Francisca Pereira de Araujo, Rafael Felippe Ratke, Josy Anteveli Osajima, Ricardo Loiola Edvan, Camila Kauany da Silva Azevedo, Bruno Henrique Vilsinski, Edvani Curti Muniz, Edson C. Silva-Filho
Summary: The controlled release of macronutrients through hydrogels made from biopolymers is a solution for agricultural production. Two superabsorbent hydrogels (SAH) were synthesized using babassu mesocarp (MB) and polyacrylamide (PAM) via graft copolymerization. One hydrogel (HMBP) contained potassium phosphate fertilizer, serving as a nutrient carrier and soil adjuster. Characterization by X-ray diffraction (XRD) showed distinct crystallographic characteristics in the hydrogels, indicating interactions between the fertilizers and macromolecular chains. Fourier transform infrared spectroscopy (FTIR) identified a band at 1,121 cm(-1) differentiating the HMBP and HMB hydrogels, attributed to the incorporation of potassium phosphate. Thermogravimetric analysis (TG and DTG) demonstrated the thermal stability of the materials. Swelling tests exhibited the superabsorbent capacity of the hydrogels, with swelling capacity of 250 to 300 (g/g) depending on the pH of the medium. Toxicity studies using Artemia showed no risks associated with the developed products. Furthermore, the hydrogels containing potassium phosphate show great potential as macronutrient delivery systems, making them promising input for agricultural applications.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Paloma Nayra da Silva Lima, Anupama Ghosh, Ariane Nascimento, Lais Helena Sousa Vieira, Rubens Silva Costa, Odair Pastor Ferreira, Guilherme J. P. Abreu, Kazunori Fujisawa, Edson Cavalcanti Silva-Filho, Antonio Gomes Souza Filho, Anderson Oliveira Lobo, Mauricio Terrones, Bartolomeu Cruz Viana
Summary: Activated carbon (AC) was synthesized from babassu mesocarp through thermal pre-treatments and potassium hydroxide activation, resulting in ACs with varied structure and surface properties. The ACs exhibited low structural order, high specific surface area, micropores, mesopores, and negatively charged surface oxygen functional groups, making them potential adsorbents for cationic chemical species. The adsorption of methylene blue cationic dye on the ACs, driven by Coulombic interaction and diffusion, demonstrated fast and efficient dye uptake, making them renewable and sustainable adsorbents.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Review
Geochemistry & Geophysics
Robson Cunha, Pollyana Trigueiro, Maria del Mar Orta Cuevas, Santiago Medina-Carrasco, Thiago M. Duarte, Luzia M. de C. Honorio, Dihego H. L. Damacena, Maria Gardennia Fonseca, Edson C. da Silva-Filho, Josy A. Osajima
Summary: In recent years, there has been significant scientific interest in anthocyanins, natural dyes, due to their intrinsic antioxidant properties and health benefits. However, their instability limits their practical use. To address this, researchers have looked into how clay minerals can be used to stabilize anthocyanins by taking advantage of characteristics such as adsorption capacity, good surface chemistry, and ion exchange capacity. This review summarizes various studies that have explored the use of different clays or clay minerals as stable inorganic matrices for improved color stability and resistance against thermal- and photodegradation of anthocyanins. Additionally, potential applications for the resulting anthocyanin-based hybrids are discussed.
Article
Materials Science, Multidisciplinary
Luis H. de Oliveira, Idglan S. de Lima, Adriana N. dos Santos, Pollyana Trigueiro, Humberto M. Barreto, Juan Antonio Cecilia, Josy A. Osajima, Edson C. da Silva-Filho, Maria G. Fonseca
Summary: In this study, the incorporation of chlorhexidine into sodium bentonite was evaluated by monitoring the interaction between the clay sample and organic molecules. The antibacterial activity of the hybrids against Staphylococcus aureus and Escherichia coli was also tested. The results showed that chlorhexidine was successfully intercalated into clay, and the hybrids exhibited excellent antibacterial activity.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Medicinal
Yulla Klinger de Carvalho Leite, Antonia Carla de Jesus Oliveira, Patrick Veras Quelemes, Napoleao Martins Argolo Neto, Camila Ernanda Sousa de Carvalho, Huanna Waleska Soares Rodrigues, Michel Mualem de Moraes Alves, Fernando Aecio de Amorim Carvalho, Daniel Dias Rufino Arcanjo, Edson Cavalcanti da Silva-Filho, Alessandra Durazzo, Massimo Lucarini, Maria Acelina Martins de Carvalho, Durcilene Alves da Silva, Jose Roberto de Souza de Almeida Leite
Summary: In this study, a scaffold based on chitosan and phthalated cashew tree gum was developed and tested as a support for the growth of human mesenchymal stem cells. The scaffold showed high swelling rate and appropriate pore sizes analyzed by scanning electron microscopy. Cells seeded on the scaffold exhibited typical morphology, attachment, and adequate distribution inside the matrix pores.
Review
Engineering, Environmental
Dihego Henrique L. Damacena, Pollyana Trigueiro, Victor Hugo Monteiro, Luzia Maria C. Honorio, Thiago Marinho Duarte, Robson Cunha, Marcelo B. B. Furtini, Maria Gardennia Fonseca, Edson C. da Silva-Filho, Josy A. A. Osajima
Summary: Saponite, a clay mineral with distinctive characteristics, can be modified and used to effectively remove hazardous contaminants in water treatment. Various methods for modifying saponite have been described, and saponite derivatives have shown high efficiency in photocatalytic and adsorption processes.
ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Eliadna de Lemos Vasconcelos Silva, Antonia Carla de Jesus Oliveira, Livia Maria Coelho de Carvalho Moreira, Edson C. Silva-Filho, Almir Goncalves Wanderley, Monica Felts de La Roca Soares, Jose Lamartine Sores-Sobrinho
Summary: In this study, a nanoparticulate system using acetylated cashew gum (ACG) and chitosan was developed for oral administration of insulin. The results showed that the nanoparticles had good biocompatibility and effective oral insulin release.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Lorenna Bastos Nogueira da Rocha, Ricardo Barbosa Sousa, Marcus Vinicius Beserra dos Santos, Napoleao Martins Argolo Neto, Leticya Lorrayne da Silva Soares, Francisca Louenny Cardoso Alves, Maria Acelina Martins de Carvalho, Josy Anteveli Osajima, Edson C. Silva-Filho
Summary: This research describes the synthesis and characterization of a new scaffold made from cashew gum and hydroxyapatite. The scaffold showed a crystalline structure and porous morphology. Adipose-derived stem cells (ADSCs) isolated from rats showed fibroblast morphology, adhesion capacity, and the ability to differentiate into osteogenic, adipogenic, and chondrogenic lineages. The scaffold exhibited high cell viability and hemocompatibility.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Michelle de Sousa Ferreira, Fabio de Oliveira Silva Ribeiro, Flaviane Franca Dourado, Antonia Carla de Jesus Oliveira, Thais Danyelle Santos Araujo, Lucas Moreira Brito, Claudia Pessoa, Lais Ramos Monteiro de Lima, Regina Celia Monteiro de Paula, Edson Cavalcanti Silva-Filho, Durcilene Alves da Silva
Summary: This study investigates the esterification reaction in the polysaccharide from Gracilaria birdiae seaweed and its antioxidant potential. Phthalic anhydride was used as the reactant at different reaction times and a molar ratio of 1:2. Characterization of the derivatives was done through FTIR, TGA, DSC, and XRD. The derivatives exhibited reduced carbonyl and hydroxyl groups, increased crystallinity, and demonstrated good antioxidant properties against DPPH and ABTS radicals. The phthalate derivative showed selectivity towards the melanoma tumor cell line.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Emilly C. Silva, Charlie G. Gomes, Mariana A. Vieira, Andre R. Fajardo
Summary: This study was financially supported by Conselho Nacional de Desenvolvimento Cientifico e Tecnológico, Brazil (CNPq) and PQ fellowship (Process 303125/2022-5) to A.R.F. The study also received partial funding from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brazil (CAPES/Proap), Finance Code 001. The authors would like to thank CTNano-UFMG (Brazil) for donating MWCNT-f.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)