Article
Chemistry, Analytical
Yao Ma, Liping Zhao, Linsen Li, Chao Zhu, Feng Qu
Summary: A new type of aptamer-functionalized pH-responsive polymer-modified magnetic nanoparticles (ApMNPs) was developed for specific enrichment and sensitive determination of lactoferrin (Lf) in complex matrixes. The Lf-binding aptamers were conjugated onto pH-responsive polymer-modified magnetic nanoparticles (pMNPs) to prepare Lf-ApMNPs, which showed good selectivity and adsorption capacity for Lf. The introduction of pH-responsive monomer effectively regulated the adsorption-desorption process, making it a facile and efficient approach for the determination of targets in biological samples.
Article
Chemistry, Physical
Shuai Lv, Weijun Peng, Yijun Cao, Shuguang Liu, Wei Wang, Guixia Fan, Yukun Huang, Xiangyu Song
Summary: In this study, a novel pH-sensitive flocculant, poly(AM-DEA-DPL) (PADD), was synthesized and characterized. PADD exhibited excellent turbidity removal and flocculation effects on both hydrophilic and hydrophobic suspensions. It was found to be an amphoteric flocculant with a specific isoelectric point.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Multidisciplinary
Ambili Ramanthrikkovil Variyam, Yuval Agam, Alessandro Paradisi, Carlo Augusto Bortolotti, Nadav Amdursky
Summary: This article investigates the use of mixed ionic-electronic conductive biopolymers for electronic and bioelectronic applications. The authors demonstrate that by modifying specific amino acids of a protein-based biopolymer with naphthalenediimide (NDI), the electronic transport of the material can be improved without compromising its native ionic transport. The study also shows that by reducing the NDI moieties, a high conductivity value can be achieved. The easy post-polymerization functionalization chemistry of NDI makes this new strategy highly attractive for the development of sustainable mixed conductors using biopolymers.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Polymer Science
Karla F. Garcia-Verdugo, Andya J. Ramirez-Irigoyen, Monica Castillo-Ortega, Dora E. Rodriguez-Felix, Jesus M. Quiroz-Castillo, Judith Tanori-Cordova, Francisco Rodriguez-Felix, Antonio Ledezma-Perez, Teresa del Castillo-Castro
Summary: The study introduces a novel semi-interpenetrating polymer network (s-IPN) synthesized through an autoclaving process, avoiding toxic crosslinkers and enabling simultaneous sterilization. The PVA/COP/PVME hydrogel exhibits promising performance with its modified transition temperature, pH-dependent swelling kinetics, and sustained drug release behavior at different temperature and pH values. The s-IPN shows potential for various biomedical applications, particularly in controlled drug delivery in response to pH and temperature conditions.
MACROMOLECULAR RESEARCH
(2022)
Article
Chemistry, Analytical
Iulia Antohe, Luiza-Izabela Jinga, Vlad-Andrei Antohe, Gabriel Socol
Summary: The study focuses on the fabrication and characterization of a surface plasmon resonance (SPR) pH sensor using platinum (Pt) and polyaniline (PANI) layers on an unclad core of an optical fiber. The sensor showed a fast and linear response in both acid and alkali solutions, with a pH operational range of 1 to 14. The proposed sensor has potential applications in biomedical, environmental monitoring, and real-time on-site measurements.
Article
Crystallography
Jin Motoyanagi, Ayane Fujishima, Masahiko Minoda
Summary: This study investigates a new amphipathic poly(vinyl ether) with an SP moiety, exploring its photoresponsive properties and the control of self-assembly through photoirradiation.
Review
Chemistry, Multidisciplinary
Jiansen Pan, Xiaoqing Ai, Chunfeng Ma, Guangzhao Zhang
Summary: This article reviews the recent progress in degradable vinyl polymers for marine anti-biofouling, focusing on the strategies for preparing these polymers, the synthesis and performance of various types of degradable polymers, and their potential applications. Polymers with degradable main chains and hydrolyzable side groups combine the advantages of SPC and degradable polymers, making them promising materials for high-efficiency, long-lasting, environmentally friendly, and broad-spectrum coatings to inhibit marine biofouling.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Jean Schoeller, Karin Wuertz-Kozak, Stephen J. J. Ferguson, Markus Rottmar, Jonathan Avaro, Yvonne Elbs-Glatz, Michael Chung, Rene M. Rossi
Summary: The ability of poly(ethylene-co-vinyl alcohol) nanofibers to release ibuprofen for the treatment of chronic wounds was evaluated. The electrospinning of different compositions of poly(ethylene-co-vinyl alcohol) copolymers was optimized, and the release kinetics of ibuprofen from the nanofibers at different temperatures were studied. The scaffolds also showed no cytotoxicity to normal human fibroblasts, indicating their potential for use in chronic wound treatment.
NANOSCALE ADVANCES
(2023)
Review
Chemistry, Multidisciplinary
Cui Liu, Fang Zhang, Jiao Hu, Wenhui Gao, Mingzhen Zhang
Summary: Carbon nanodots with sp(2)/sp(3) framework and diameter of <10 nm have abundant functional groups or polymers on their surface, making them attractive for various applications. They exhibit good optical properties and intrinsic pH-sensitive photoluminescence, showing great potential for pH sensing, particularly in biotic environments. Challenges and future research directions of pH-sensitive C-dots are also discussed in this review, aiming to contribute to the development of photoluminescent nanomaterials with pH-sensitive properties.
FRONTIERS IN CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Qian Jiang, Jinming Duan, Azim Uddin, Xianyan Wu, Honglei Yi, Liwei Wu
Summary: A radar absorbing material named waffle structured composite (WSC) was proposed based on the periodic structure element formed by one-step double-sided knitting process. The unique waffle structured pattern achieved the integration of structure and function. The WSC showed good RCS reduction and continuous large-scale manufacture, which is promising in practical engineering application of radar stealth.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Composites
Xiaojian Zhou, Magda E. Tawfik, Salwa H. El-Sabbagh, Sara N. Ghanem, Hisham A. Essawy
Summary: Blending a siloxane polymer containing vinyl groups with poly(vinyl chloride) (PVC) can enhance plasticization and improve stability against thermal decomposition and UV exposure. However, immiscibility between silicone rubber and PVC worsens at higher silicone polymer loadings. The inclusion of silicone polymer does not significantly affect thermal resistance between 200°C and 350°C, but it protects the material from intensive decomposition at higher temperatures and increases the residual weight. Fourier transform infrared spectra show no significant dehydrochlorination or changes in material properties after UV exposure, indicating that the inhibition of dehydrochlorination may be achieved through the instant attack of radicals on PVC backbone by vinyl groups of the silicone polymer and the formation of a network structure.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Silong Tu, Xin Lin, Liren Xiao, Hongyu Zhen, Wen Wang, Qidan Ling
Summary: In the past decade, significant progress has been made in the study of organic solar cells (OSCs). Achieving high efficiency OSCs with prominent stability is crucial for commercial applications. In this study, two crosslinkable polymers were successfully synthesized and showed outstanding performance without additives. Through thermal crosslinking, devices with enhanced stability were fabricated, demonstrating the potential for improving the overall stability of OSCs.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Review
Nanoscience & Nanotechnology
Shijie Zhang, Bo Cheng, Zirui Jia, Zhiwei Zhao, Xiaotian Jin, Zehao Zhao, Guanglei Wu
Summary: The booming electronic technology has brought both great convenience and unprecedented challenges to human health, with electromagnetic pollution being one of the most serious issues. In order to effectively address the harmful effects, high-efficiency electromagnetic wave absorption materials (EWAMs) are urgently needed. Hollow EWAMs have attracted significant research interest due to their remarkable advantages. This review summarizes the latest progress and understanding of various loss types in hollow-structured EWAMs and their hybrids, discusses fabrication strategies, absorption properties, and attenuation mechanisms of selected achievements, and also explores the challenges and future trends of hollow EWAMs.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Chemistry, Applied
Yu Zhang, Junxi Liu, Pengfei Dou, Zhijing Wu, Ziming Zheng, Xianglin Pan, Tao Zhou, Kaiping Wang
Summary: The study elucidated the oral absorption characteristics and mechanisms of a pectin-type polysaccharide from Smilax china L. through in vitro and in vivo tracking. The polysaccharide was shown to be absorbable in the small intestine, with transport across the epithelium facilitated by transcellular and paracellular pathways. This research provides insights for the further development of pectin polysaccharides.
CARBOHYDRATE POLYMERS
(2021)
Article
Materials Science, Multidisciplinary
Miaobo Pan, Gabriela Moran Cruz, Chloe Grazon, Djamila Kechkeche, Ludivine Houel Renault, Gilles Clavier, Rachel Meallet-Renault
Summary: pH is a fundamental parameter for describing the quality of aqueous solutions. We have developed a ratiometric fluorescent platform that can monitor pH in both solutions and surfaces. By grafting pH-sensitive fluorescent nanoparticles onto a silanized glass surface, we were able to accurately measure pH and monitor the growth of Escherichia coli through optical measurements within the physiological pH range.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Murilo P. Moises, Cleiser Thiago P. da Silva, Cinthia A. A. Silva, Joziane G. Meneguin, Gustavo G. Fonseca, Marcos R. Guilherme, Andrelson W. Rinaldi, Emerson M. Girotto, Eduardo Radovanovic
Summary: This study synthesized a microporous sustainable Zeolite A material using agroindustry solid waste and functionalized it with silver nanoparticles. The release transport properties of silver ions were investigated, and it was found that the antimicrobial activity of the material depended on exposure time and concentration.
Article
Biophysics
Rafaella T. Paschoalin, Nathalia O. Gomes, Gabriela F. Almeida, Stanley Bilatto, Cristiane S. Farinas, Sergio A. S. Machado, Luiz H. C. Mattoso, Osvaldo N. Oliveira Jr, Paulo A. Raymundo-Pereira
Summary: This paper presents a wearable non-enzymatic electrochemical sensor for the detection of pesticides on the surface of agricultural and food samples. The sensor is low-cost and non-destructive, making it a promising tool for precision agriculture.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Applied
Elizangela H. Fragal, Vanessa H. Fragal, Elisangela P. Silva, Alexandre T. Paulino, Edson C. da Silva Filho, Marcos R. Mauricio, Rafael Silva, Adley F. Rubira, Edvani C. Muniz
Summary: This review presents recent advances in polysaccharide-based magnetic hydrogels as smart platforms for various biomedical applications, covering their synthesis methods, synergic properties, and contributions in drug delivery, tissue regeneration, and hyperthermia therapy.
CARBOHYDRATE POLYMERS
(2022)
Article
Agricultural Engineering
Anderson F. Manoel, Pedro I. C. Claro, Fabio Galvani, Luiz H. C. Mattoso, Jose M. Marconcini, Gerson L. Mantovani
Summary: In this study, cellulose nanocrystals (CNCs) were extracted from macauba palm fibers and incorporated into a thermoplastic starch matrix. The nanocomposites showed improved mechanical properties and thermal stability, with the nanocomposite containing 3.25% CNCs exhibiting the best performance.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Analytical
Juliana C. Soares, Andrey C. Soares, Monara Kaelle S. C. Angelim, Jose Luiz Proenca-Modena, Pedro M. Moraes-Vieira, Luiz H. C. Mattoso, Osvaldo N. Oliveira Jr
Summary: This paper presents a low-cost immunosensor capable of detecting the spike protein of SARS-CoV-2. The immunosensor exhibits a low limit of detection, high selectivity, and can distinguish the spike protein from interfering species in multidimensional projection plots. The excellent analytical performance of the immunosensor is validated, and its mechanism is attributed to the specific antibody-protein interaction. This immunosensor can be used for mass testing in places with limited resources.
Article
Chemistry, Physical
Manuel E. G. Winkler, Elisangela P. da Silva, Marcos H. Kunita, Adley F. Rubira
Summary: This study presents a method for obtaining silica particles through pressured carbonation and demonstrates the influence of CO2 pressure on material properties. The simplicity and practical importance of this method, as well as its ability to synthesize various types of silica materials and composites, are highlighted.
Article
Geosciences, Multidisciplinary
Marcelo D. R. Pereira, Joao B. P. Cabral, Michaela A. B. Camara, Francisco D. Maldonado, Valter A. Becegato, Alexandre T. Paulino, Fernanda L. Ramalho
Summary: Soil erosion has long-term environmental impacts on water resource silting and biodiversity loss. This study analyzed the susceptibility to soil erosion in the drainage basins of Jatai, Brazil, and identified the areas most prone to soil losses.
Article
Environmental Sciences
Mario Cezar Pozza Junior, Andressa Giombelli Rosenberger, Franciele Fernanda da Silva, Douglas Cardoso Dragunski, Edvani Curti Muniz, Josiane Caetano
Summary: The use of electrochemical sensors in the detection and quantification of chemical agents from environmental samples is effective for monitoring environmental quality. In this study, a polymer-based sensor for 2,4,6-trichlorophenol determination was developed using electrospinning of a blend of poly(lactic acid)/poly(butylene adipate-co-terephthalate) (PLA/PBAT) with graphite. The thermal treatment of graphite-containing fibres improved the adhesion surface for adsorption of the analyte, leading to enhanced peak current in the electrochemical tests. The developed PLA/PBAT/Graphite sensor exhibited excellent detection and quantification limits, as well as a strong linear response.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Food Science & Technology
Andreia Paula Dal Castel, Angelica Ines Kaufmann, Creciana Maria Endres, Weber da Silva Robazza, Alexandre Tadeu Paulino
Summary: This study evaluates the water sorption properties of lyophilized jabuticaba peel and compares the fitting performance of various isotherm models. The results show that different models have the best fit at different temperatures. These findings provide guidance for the storage and production conditions of jabuticaba peel and the development of dehydrated food processes.
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
(2023)
Article
Polymer Science
Alessandra Ruyz Medeiros, Fabiana da Silva Lima, Andressa Giombelli Rosenberger, Douglas Cardoso Dragunski, Edvani Curti Muniz, Eduardo Radovanovic, Josiane Caetano
Summary: This study aimed to use electrospinning to obtain PBAT/PLA polymer fibers with semiconductors TiO2-R and Fe3O4 to enhance the photocatalytic degradation of environmental contaminants. The parameters used in electrospinning were a needle to target distance of 12 cm, a flow rate of 1 mL h(-1), and a voltage of 14 kV. The best mass ratio of semiconductors in the fibers was determined to be 10% TiO2-R and 1% Fe3O4 at pH 7.0. Characterization techniques such as SEM, DSC, XRD, TGA, and FTIR confirmed the presence of TiO2-R and Fe3O4 in the fibers and their interaction with the polymers, leading to changes in crystallinity and degradation temperature. The fibers exhibited a 64.0% efficiency in degrading Reactive Red 195 dye within 24 hours, indicating potential for photocatalytic degradation of environmental contaminants.
Article
Environmental Sciences
Joao B. P. Cabral, Wanderlubio B. Gentil, Fernanda L. Ramalho, Celso C. Braga, Valter A. Becegato, Alexandre T. Paulino
Summary: The cerrado biome in Brazil is strategically important for agriculture, energy production, and other activities. However, the intensive use of chemicals and other products has led to potentially toxic elements contaminating the soil. This study evaluates the presence of these elements in the Ariranha stream basin and finds contamination levels exceeding regulatory limits.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Environmental Sciences
F. F. dos Santos, W. B. F. Filho, A. T. Paulino, A. H. Rosa
Summary: The sorption capacity and mechanism of sulfadiazine in different soils were studied, and it was found that the pedological properties of the soils affected the sorption efficiency of sulfadiazine, with higher organic matter and clay content soils showing higher sorption efficiency.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Elisangela Pacheco da Silva, Vanessa Hafemann Fragal, Elizangela Hafemann Fragal, Thiago Sequinel, Luiz Fernando Gorup, Rafael Silva, Edvani C. Muniz
Summary: Plastic waste consumption has been exponentially increasing every year, posing a significant environmental concern in modern society. Improper disposal of used supercapacitors also leads to serious environmental impacts. Transforming trash into high-valued materials, such as carbon nanomaterial supercapacitors, is a critical action to address these issues.
Article
Environmental Sciences
Sedami Tozoun Romain Agassin, Jocinei Dognini, Alexandre Tadeu Paulino
Summary: This study investigated the potential of raw rice husk biochar (RRHB) as an industrial byproduct for water decontamination using rhodamine B as a model pollutant. The interaction between the biochar and the pollutant was explained by specific chemical groups identified in the biochar's structure, porosity of the sorbent, and surface area analysis. Kinetic and thermodynamic parameters indicated that RRHB is a potential biosorbent for cationic dyes. Moreover, the recovery of the biosorbent adds value to the byproduct and makes it an excellent option for water purification filters.
Article
Engineering, Environmental
Mauricio Jose Paz, Tainara Vieira, Heveline Enzweiler, Alexandre Tadeu Paulino
Summary: Agrochemicals are potential environmental pollutants due to their toxicity and resistance to degradation. Chitosan/sawdust/magnetite composite membranes were synthesized and characterized for the photodegradation of agrochemicals in water, showing potential as catalysts for water and wastewater purification processes with varying efficiency under different experimental conditions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
