Article
Polymer Science
Adrian Borquez-Mendivil, Abel Hurtado-Macias, Jesus Eduardo Leal-Perez, Joaquin Flores-Valenzuela, Ramon Alvaro Vargas-Ortiz, Francisca Guadalupe Cabrera-Covarrubias, Jorge Luis Almaral-Sanchez
Summary: Hybrid coatings of SiO2 and recycled unsaturated polyester resin (R-UPR) were prepared by the sol-gel process on glass substrates. The results showed that SiO2 enhanced the mechanical and thermal properties of the R-UPR, and the coatings exhibited excellent adhesion to the substrate with a smooth surface.
Article
Materials Science, Multidisciplinary
S. Zarei, M. Hasheminiasari, S. M. Masoudpanah, J. Javadpour
Summary: ZnO-xSnO(2) composite films were prepared by sol-gel spin coating process and characterized. The films showed distinct microstructure with ZnO pyramids on SnO2 nanoparticles. The ZnO-25 mol% SnO2 film exhibited higher photocatalytic degradation of methylene blue dye compared to pristine ZnO and SnO2 films.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Gokhan Demircan, Enes Furkan Gurses, Bulent Aktas, Serife Yalcin, Abuzer Acikgoz, Gokhan Ceyhan, Mehmet Vehbi Balak
Summary: Ti and Si doped ZnO thin films were fabricated using the sol-gel spin coating method. The structural and optical properties of the films were investigated using various characterization techniques. The results showed that the surface morphology consisted of ZnO fiber structures and the thickness of the films increased with Ti content. XRD and Raman spectra confirmed the retention of the hexagonal wurtzite crystal structure, while the crystallinity decreased. The films exhibited high optical transmittance and a redshift in the UV spectrum with increasing Si concentration.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Optics
Wuttichai Sinornate, Hidenori Mimura, Wisanu Pecharapa
Summary: This investigation focuses on the structural, optical and electrical properties of Sb-doped/undoped ZnO double layer structure annealed in a nitrogen atmosphere. The study reveals that the crystal structure is deteriorated due to Sb incorporation in the ZnO lattice and nitrogen annealing, and the diffraction intensity decreases with different thicknesses of the ZnO film. The presence of Sb atom in the doped ZnO film is confirmed by depth profile measurement. The transmittance spectra show high transparency with interference fringe, and the photoluminescence spectrum exhibits near-band-edge emission of ZnO without any emission in the visible region. The electrical properties demonstrate diode characteristics and photocurrent under dark and UV irradiation, respectively.
Article
Polymer Science
Milad Sheydaei, Milad Edraki, Seyyed Mehdi Radeghi Mehrjou
Summary: In this study, Clitoria ternatea (CT) was incorporated into sodium montmorillonite (Na+-MMT), and the resulting nanoparticles (CT-MMT) were added to sol-gel-based hybrid silanol coatings (SGC). The presence of CT in the structure of CT-MMT was confirmed by various characterization techniques. The addition of CT-MMT improved the corrosion resistance of the coatings and also exhibited antimicrobial properties against gram-positive and gram-negative bacteria.
Article
Materials Science, Textiles
Dan Li, Zhen-hua Wang, Yuan-shu Zhu, Fei You, Song-tao Zhou, Gang Li, Xue-feng Zhang, Chang Zhou
Summary: The sol-gel process is used to improve the thermal oxidation and combustion behaviors of cotton fabrics by covering them with a silica-based film. The SiO2-KH560-ZB hybrid sol, prepared with silica sol, KH560, and ZB, effectively enhances the flame retardancy of the cotton fabrics. KH560 plays a crucial role in coupling the components and increasing compatibility, while ZB, silica sol, and KH560 together show synergistic effects in enhancing flame retardancy.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Materials Science, Ceramics
M. Rocha, Francisca P. Araujo, S. Castro-Lopes, Idglan S. de Lima, Edson Cavalcanti Silva-Filho, Josy Anteveli Osajima, Carla S. Oliveira, Bartolomeu C. Viana, Luciano C. Almeida, Y. Guerra, R. Pena-Garcia
Summary: In this study, the influence of Fe and Pr addition on the structural, optical, and antibacterial properties of spherical ZnO nanoparticles synthesized via sol gel method was investigated. The lattice constants values increased while the average crystallite size decreased with varying Pr concentration. Raman and FTIR spectroscopies confirmed the single-phase formation of ZnO and the presence of oxygen vacancies. The samples exhibited agglomerated spherical morphology and the textural properties were affected by the inclusion of Fe. The synthesized materials showed promising antimicrobial activity against Escherichia coli and Staphylococcus aureus due to nanomaterial-bacteria interactions.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Ra'na Rafiei Hashjin, Zahra Ranjbar, Hossein Yari, Gelareh Momen
Summary: This paper presents a durable superhydrophobic coating obtained through a sol-gel route. By utilizing chemical characteristics of the sols and incorporating different pH values during the spraying process, the coating's robustness and weathering durability were significantly improved.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Leandro L. Peres, Camila M. Cholant, Rafaela M. J. Lemos, Marco P. Rodrigues, Luana U. Kruger, Richard Pereira, Wladimir H. Flores, Andre Gundel, Douglas L. da Silva, Agnieszka Pawlicka, Cesar O. Avellaneda
Summary: The study used the peroxovanadate sol-gel method to produce ZnO-doped V2O5 thin films, demonstrating that ZnO doping improved the cyclic stability and reversibility of the films and resulted in a mixture of crystalline phases.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Leandro L. Peres, Camila M. Cholant, Rafaela M. J. Lemos, Marco P. Rodrigues, Luana U. Krueger, Richard Pereira, Wladimir H. Flores, Andre Guendel, Douglas L. da Silva, Agnieszka Pawlicka, Cesar O. Avellaneda
Summary: This study used the peroxovanadate sol-gel method to produce ZnO-doped V2O5 thin films and investigated the effect of doping on the electrochromic and structural characteristics of the films. The results showed that ZnO doping improved the cyclic stability and reversibility of the films, making them promising candidates for electrochromic device applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Chemical
Akira Miwano, Takehiro Yonezawa, Noriko Yamauchi, Kouichi Nakashima, Yoshio Kobayashi
Summary: The study suggests a new coating technique for thermistors using zirconia, which shows excellent chemical resistance and electrical insulation properties. Pre-silica coating on the substrate can improve the adhesion of ZrO2 films.
Article
Chemistry, Physical
Dongwan Kim, Jae-Young Leem
Summary: In this study, a MoS2/ZnO heterostructure with excellent UV photoresponse characteristics was successfully synthesized, with the MoS2 concentration of 0.2 M showing the best performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
K. S. Duran, N. Hernandez, L. M. Rueda, C. A. Hernandez-Barrios, A. E. Coy, F. Viejo
Summary: This study developed multilayer barrier-bioactive coatings to enhance the corrosion resistance of magnesium alloy and promote the growth of apatite-like phases. However, an increase in salt content led to the formation of porous coatings, affecting the corrosion resistance of magnesium alloy.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Ceramics
Muecahid Ozcan, Burak Birol, Oznur Dulger Kutlu, Figen Kaya
Summary: This study investigated the photocatalytic properties of ZnO nanoparticles deposited on ceramic substrates with adjustable porosity. It was found that increasing the porosity of the ceramics improved the photocatalytic degradation of contaminants.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Luis A. Hermida-Montero, F. Paraguay-Delgado, Luisa F. Cruz, Daniel Carrillo, Arturo Mtz-Enriquez, Nicolaza Pariona
Summary: This study investigated the in-vitro antifungal activity of ZnO nanoparticles against mutualistic fungi of ambrosia beetles, revealing that uncoated ZnO nanoparticles obtained by the hydrothermal method showed higher antifungal capacity. The coating of NPs was found to be more critical than their size in improving antifungal properties.
Article
Polymer Science
Ramona Marina Grigorescu, Paul Ghioca, Lorena Iancu, Madalina Elena David, Rodica-Mariana Ion, Raluca Augusta Gabor, Cristian-Andi Nicolae, Sofia Teodorescu-Slamnoiu, Elvira Alexandrescu
Summary: The paper aims to reuse polystyrene fraction of WEEE and non-metallic part of printed circuit boards as reinforcing fillers for shoe sole materials. By adding paraffin-naphthenic oil, improved processability is achieved. The mechanical properties of the materials decrease with increasing waste dosage, but properties for the targeted application are maintained until 15-20% filler blend. The addition of waste leads to an increase in storage modulus and viscosity, indicating a reinforcing effect.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Engineering, Environmental
Denis Mihaela Panaitescu, Violeta Melinte, Adriana Nicoleta Frone, Cristian Andi Nicolae, Augusta Raluca Gabor, Luiza Capra
Summary: In this study, two polyurethane elastomers were synthesized and blended with PHBV, and the results showed that the addition of polyurethane can improve the elongation of PHBV without significantly affecting its thermal stability.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Polymer Science
Oanamari Daniela Orbulet, Annette Madelene Dancila, Simona Caprarescu, Cristina Modrogan, Violeta Purcar
Summary: The main objectives of this study were to immobilize nano zerovalent iron (nZVI) onto a polymeric material (Purolite A400) and synthesize the polymeric material (A400-nZVI) using sodium borohydride (NaBH4) reduction. The obtained A400-nZVI was used to remove nitrate ions from simulated groundwater. The polymeric materials, with and without nZVI (A400 and A400-nZVI), were characterized using FTIR, SEM-EDAX, XRD, and TGA analysis. The results confirmed the presence of nZVI on the polymeric material (A400). The adsorption capacity of A400-nZVI as a polymeric adsorbent was evaluated through kinetic and thermodynamic studies. The experimental results showed that nitrate ions reduction followed the pseudo-second-order kinetic model and Freundlich isotherm. A potential reaction mechanism was suggested based on the kinetic model results. A higher nitrate removal (>80%) was achieved under acidic conditions. The results indicate that the obtained A400-nZVI can be considered as a potential polymeric adsorbent for various pollutants in groundwater and wastewater.
Article
Polymer Science
Denis Mihaela Panaitescu, Zina Vuluga, Adriana Nicoleta Frone, Augusta Raluca Gabor, Cristian-Andi Nicolae, Catalina-Diana Usurelu
Summary: SEBS and SBS copolymers were used as modifiers in PP/hemp fibers composites for electrical vehicle parts. The addition of MAPP improved the mechanical properties of the composites. The composites were developed as substitutes for fully synthetic polymeric materials or metal components in automotive part manufacturing.
Article
Chemistry, Multidisciplinary
Violeta Purcar, Valentin Raditoiu, Florentina Monica Raduly, Alina Raditoiu, Simona Caprarescu, Adriana Nicoleta Frone, Raluca Somoghi, Mihai Anastasescu, Hermine Stroescu, Cristian-Andi Nicolae
Summary: In recent years, various commercial coatings based on fluorinated materials have been developed using different preparation routes. However, these techniques often require expensive and complex equipment, involve multiple manufacturing steps, or are time- or cost-consuming. This study aimed to develop sustainable hydrophobic and transparent fluorinated hybrid coatings using the sol-gel method, which offers advantages such as lower cost, energy consumption, and easier implementation. The influence of perfluorooctanoic acid in the sol-gel process on the properties of the coatings was evaluated, and different silane precursors were used to synthesize hybrid silica materials. The fluorinated silica coatings showed good transparency and hydrophobicity, making them suitable for potential optical devices.
APPLIED SCIENCES-BASEL
(2023)
Article
Pharmacology & Pharmacy
Raluca Ianchis, Rebeca Leu Alexa, Ioana Catalina Gifu, Maria Minodora Marin, Elvira Alexandrescu, Roxana Constantinescu, Andrada Serafim, Cristina Lavinia Nistor, Cristian Petcu
Summary: In this study, green crosslinked citric acid-salecan hydrogels were investigated as novel materials for regenerative medicine. The impact of salecan and citric acid on the properties of the hydrogels was studied, and it was found that the hydrogels exhibited microporous morphology, good swelling capacity, pH responsiveness, great mechanical stability, and good antibacterial activity. Furthermore, the salecan hydrogels were used as printing inks to create 3D structures with high fidelity and integrity.
Article
Chemistry, Physical
Denis Mihaela Panaitescu, Marius Stelian Popa, Florin Ciuprina, Laura Enache, Adriana Nicoleta Frone, Cristian Andi Nicolae, Augusta Raluca Gabor, Roxana Trusca, Valentin Raditoiu, Bogdan Trica, Marius Ghiurea
Summary: Polymer nanocomposites with high dielectric permittivity are extensively studied for microelectronic devices and energy storage applications. Poly(vinylidene fluoride) (PVDF) is a flexible and lightweight polymer with higher dielectric permittivity. The addition of nanosilica and polyaniline (PANI) can further enhance the mechanical and dielectric properties of PVDF, making it suitable for energy storage applications.
SURFACES AND INTERFACES
(2023)
Review
Chemistry, Physical
Ioana Catalina Gifu, Raluca Ianchis, Cristina Lavinia Nistor, Cristian Petcu, Irina Fierascu, Radu Claudiu Fierascu
Summary: The continuous degradation of cultural heritage artifacts requires the continuous development of protection strategies, technologies, and materials. Polyelectrolytes have been proven effective in fighting against degradation and conserving heritage objects. This review focuses on the key developments in the use of polyelectrolytes for the preservation, consolidation, and cleaning of various heritage artifacts, including stone, metal, and organic materials like paper, leather, wood, and textiles. The state of the art in this field and future perspectives are presented.
Article
Polymer Science
Maria Minodora Marin, Ioana Catalina Gifu, Gratiela Gradisteanu Pircalabioru, Madalina Albu Kaya, Rodica Roxana Constantinescu, Rebeca Leu Alexa, Bogdan Trica, Elvira Alexandrescu, Cristina Lavinia Nistor, Cristian Petcu, Raluca Ianchis
Summary: Natural polysaccharides are recommended for medical applications due to their low cytotoxicity and hydrophilicity. Polysaccharides can be used in additive manufacturing to achieve various customized 3D structures. In this study, silica nanoparticles were added to a microbial polysaccharide to obtain printable hydrogel nanocomposites.
Article
Polymer Science
Diana Pelinescu, Mihai Anastasescu, Veronica Bratan, Valentin-Adrian Maraloiu, Catalin Negrila, Daiana Mitrea, Jose Calderon-Moreno, Silviu Preda, Ioana Catalina Gifu, Adrian Stan, Robertina Ionescu, Ileana Stoica, Crina Anastasescu, Maria Zaharescu, Ioan Balint
Summary: Nanostructured oxides (SiO2, TiO2) were synthesized using the sol-gel method and modified with noble metal nanoparticles (Pt, Au) and ruthenium dye to enhance light harvesting and promote the photogeneration of reactive oxygen species. The resulting nanostructures were embedded in a transparent polyvinyl alcohol (PVA) hydrogel. The engineered materials were evaluated for their ability to generate reactive oxygen species (ROS) and showed potential for biomedical applications.
Article
Physics, Multidisciplinary
Violeta Purcar, Valentin Raditoiu, Florentina Monica Raduly, Alina Raditoiu, Simona Caprarescu, Adriana Nicoleta Frone, Cristian-Andi Nicolae
Summary: Silica materials with and without TiO2 nanoparticles were synthesized via sol-gel route using different silane precursors. Hybrid films were prepared by depositing these materials on glass substrates. The physicochemical and optical properties of the final materials were characterized using various techniques. The interaction between silica material and TiO2 nanoparticles was confirmed by FTIR. The presence of TiO2 nanoparticles improved the thermal stability and reduced weight loss rates of the silica material. The hybrid films showed antireflective properties and different wetting abilities, which make them useful for enhancing the performance of photovoltaic devices.
ROMANIAN JOURNAL OF PHYSICS
(2023)
