Review
Polymer Science
Matin Suraj Belgaonkar, Balasubramanian Kandasubramanian
Summary: Hyperbranched polymer nanocomposites, based on unique 3D structure and high solvability of hyperbranched polymers, provide new opportunities and challenges in material science. These materials have wide applications in fields such as light-trapping, modification, and stabilization, highlighting the strong interactions between HBP matrices and nanofillers.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Analytical
Chao Ling, Lamei Guo
Summary: Fire accidents have a significant impact on people's lives and property. There is a growing interest in the flame retardant properties of polymers. Developing efficient, halogen-free, low-smoke, and low-toxicity flame retardant materials has become an important research topic. Hyperbranched polymers, with their unique three-dimensional structure and abundant end groups, have shown promising potential as flame retardants in various polymers such as epoxy resins, polypropylene, polyurethane, polylactic acid, cellulose, and ethylene-vinyl acetate copolymer.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Chemistry, Multidisciplinary
Jia-Fu Yin, Haiyan Xiao, Peidong Xu, Junsheng Yang, Zhiwei Fan, Yubin Ke, Xikai Ouyang, Geng Xin Liu, Tao Lin Sun, Liqun Tang, Stephen Z. D. Cheng, Panchao Yin
Summary: In this study, POSSs were integrated as side chains to polymer backbones, imposing strong space confinements to realize synergistic interactions among polymer chains. The resulting composites demonstrated unprecedented mechanical properties with ultra-stretchability and high impact resistance, paving a new pathway for the design of advanced cluster-based materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Composites
Leena Priya, Pradip Kar
Summary: The aim of this study was to optimize the preparation of poly(m-aminophenol)/silver nanocomposite and investigate the structure and morphology of the composites. Different morphologies of nanocomposites were obtained using different methods of preparation, with the nanocomposite with a uniform distribution of small silver nanoparticles showing the highest conductivity. These findings provide guidance for the development of nanocomposites for a wide range of applications, including sensors, supercapacitors, and electrode materials.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Jose Costa de Macedo Neto, Bruno Mello de Freitas, Adalberto Gomes de Miranda, Reinaldo de Almeida Rodrigues, Gilberto Garcia Del Pino, Antonio Claudio Kieling, Marcos Dantas dos Santos, Sergio Duvoisin Junior, Antonio Estanislau Sanches, Israel Gondres Torne, Claudia Candida Silva, Joao Carlos Martins da Costa, Roger Hoel Bello
Summary: The aim of this study was to investigate the stability and morphology of polystyrene latex with kaolinite as a filler during the synthesis of nanocomposites through emulsion polymerization. Nanocomposites with different weight percentages of kaolinite (1%, 3%, and 5%) were prepared. Latexes with 1% to 3% kaolinite showed stability during the polymerization reaction, and the hydrodynamic diameters were measured to be 93.68 nm and 82.11 nm for the latexes with 1% and 3% kaolinite, respectively. XRD, SEM, and HRTEM analysis confirmed the presence of exfoliated and intercalated structures of kaolinite.
Article
Polymer Science
Chao Liu, Hua-Long Zhang, Wen Xu, Cai-Yuan Pan, Chun-Yan Hong
Summary: A multicyclic polymer with a hyperbranched structure was successfully synthesized by initiating the ATRP of styrene with a tailored initiator. The obtained hyperbranched multicyclic polymer contained an average of 47 cyclic units and was prepared via a series of reactions including click reaction and UV-induced coupling reaction.
Article
Polymer Science
Beibei Chen, Maliha N. Syed, Samantha P. Daymon, Brian G. Olson, Oluwapelumi O. Kareem, Joseph A. Giesen, Gregory B. Fahs, Robert R. Moore, Scott M. Grayson, Sergei Nazarenko
Summary: In this study, a second generation perfectly branched dendrimer was synthesized and compared with a chemically similar but hyperbranched polymer using various characterization tools to investigate structure-bulk property relationships. High-pressure dilatometry was utilized to study the effects of temperature and pressure on the specific volume of the dendrimer and its hyperbranched polymer counterpart. The Simha-Somcynsky equation of state was successfully applied to describe the specific volume surfaces of the dendrimer and hyperbranched polymer, demonstrating its versatility across different polymeric systems.
Article
Chemistry, Physical
Elli Leppanen, Maedeh Akhoundian, Sami Sainio, Jarkko Etula, Olli Pitkanen, Tomi Laurila
Summary: Carbonaceous nanomaterials have great potential in electroanalytical applications, but their structure-performance relationship is still not well understood. In this study, a systematic electrochemical characterization is conducted on a set of carbon nanomaterials to establish this relationship and highlight the sensitivity of electrochemical performance to structural properties.
Article
Materials Science, Composites
Yalin Zhao, Zhixiong Wu, Shibin Guo, Zhengrong Zhou, Zhicong Miao, Shiyong Xie, Rongjin Huang, Laifeng Li
Summary: The HPB-GO nanocomposite prepared by grafting hyperbranched polymer exhibits excellent mechanical and thermal properties, improving the application performance of epoxy resin.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Review
Engineering, Biomedical
Yu Zhao, Zhi Shou Zhu, Juan Guan, Su Jun Wu
Summary: Hydrogels are versatile materials in biomedical engineering with applications similar to wet tissues. Silk fibroin (SF) is a natural polymer with biocompatibility and tunable biodegradation, but its poor mechanical performance hinders its structural applications. Researchers are exploring strategies to enhance the strength of SF-based hydrogels for biomedical uses.
ACTA BIOMATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Hongxia Zhong, Chunbao Feng, Hai Wang, Dan Han, Guodong Yu, Wenqi Xiong, Yunhai Li, Mao Yang, Gang Tang, Shengjun Yuan
Summary: Researchers investigated the electronic properties of inorganic antiperovskite nitrides through first-principles calculations, revealing a linear relationship between tolerance factor and various physical quantities, and designed a promising antiperovskite alloy. They also made a comprehensive comparison with conventional halide perovskites to point out the future direction for device applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Applied
M. Arkas, M. Douloudi, E. Nikoli, G. Karountzou, I Kitsou, E. Kavetsou, D. Korres, S. Vouyiouka, A. Tsetsekou, K. Giannakopoulos, M. Papageorgiou
Summary: In this study, silver nanoparticles were synthesized using PEI as a template and immobilized on silica substrates to create hybrid nanocatalysts. The effects of different PEIs and pH regulators were investigated, and the catalytic performance was improved through organic scaffold pyrolysis. This eco-friendly synthesis procedure proved to be a successful alternative for producing multifunctional nanomaterials at ambient temperature.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Chemistry, Physical
Jia Hui Chen, Yvonne Shuen Lann Choo, Wei Ting Gao, Xue Lang Gao, Zhi Hong Cai, Jia Jun Wang, Qiu Gen Zhang, Ai Mei Zhu, Qing Lin Liu
Summary: In this study, Troger's base microporous anion exchange membranes (AEMs) with hyperbranched structure were prepared by superacid catalysis. The introduction of hyperbranched structure improved the water uptake and OH- transport of the AEMs, leading to enhanced performance in alkaline fuel cells.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Pu Tan, Longzhu Liu, Zi-Yi Chen, Hanjian Lai, Yulin Zhu, Hui Chen, Nan Zheng, Yuanzhu Zhang, Feng He
Summary: The systematic investigation of three nonfullerene acceptors with chlorine substituents at different positions reveals the importance of structural regulation and molecular arrangement in improving photovoltaic performance. Chlorination can effectively enhance efficiency, with BTIC-4Cl-TCl-b showing the highest efficiency due to its quasi-3D network structure facilitating efficient electron transport.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Chemical
Dandan Jin, Jinyue Dai, Liyue Zhang, Qing Chen, Xiaoqing Liu
Summary: In order to improve the flammability and brittleness issues of epoxy resin (EP), a series of hyper-branched benzoxazines (HB1.0-HB2.5) were synthesized using DOPO-2OH and Jeffamine T403. The results showed that HB2.0 with the optimized hard/soft segment ratio was the most effective additive for EP. The EP/HB2.0 system exhibited enhanced performance with a 115% increase in impact strength and 5.7 degrees C higher Tg compared to the pristine EP. Impressively, even at a low loading of HB2.0, the modified EP achieved a UL-94 V-0 rating and a LOI value of 30.8%, indicating improved flame retardancy.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
S. Ibrahim, H. A. Abo-Mosallam, Ebrahim A. Mahdy, Gamal M. Turky
Summary: Glasses with different NiO contents were synthesized and their physical parameters and spectral properties were investigated, revealing the semiconductor nature of these glasses.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Polymer Science
Mona Abdel Rehim, Gamal Turky
Summary: This article provides insights into the synthesis techniques and properties of epoxy resin composites loaded with graphene oxide. The composites demonstrated enhanced mechanical, thermal, and electrical properties. A case study on the dielectric behavior of epoxy resin/modified graphene oxide composites is presented, exploring the effect of curing technique on the dielectric properties.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Polymer Science
Mohamed Naguib, Mohamed A. Yassin, Mona Abdel Rehim
Summary: In this study, antibacterial polyurethane films based on soybean polyols were successfully prepared. The soybean oil was modified to create bio-derived tertiary amine functionalized polyols, which were further quaternized for antibacterial effectiveness. The polyurethane films showed excellent antibacterial activity against different pathogens and could be applied as functional coatings on polypropylene films.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Jana Hildebrandt, Andreas F. Thuenemann
Summary: Microplastics and nanoplastics are causing pollution in natural environment across the globe, but the exact extent of their hazards remains unclear. While research on microplastics is well advanced, little has been done on nanoplastics due to difficulties in detection. The development of nanoplastics reference materials can help identify and quantify nanoplastics in nature. This study successfully synthesized stable aqueous dispersions of polypropylene nanoparticles without the need for surfactants.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Manal A. Mahdy, A. A. Azab, I. K. El Zawawi, G. Turky
Summary: This study investigates the structural, morphological, optical, magnetic, and dielectric properties of (ZnO)(1-x)(CoFe2O4)(x) nanocomposites synthesized by sonomechanical method. The addition of CoFe2O4 significantly affects the optical, magnetic, and dielectric properties of the nanocomposites.
Article
Multidisciplinary Sciences
Mona Abdel Rehim, Hamdy A. Zahran, Marwa Al-Moghazy
Summary: The interest in active packaging for extending food shelf life has increased recently, driven by the negative impact of synthetic plastic wastes on the environment. Researchers have developed an active packaging film made of a composite composed of Lepidium sativum extract (LSE), polyvinyl alcohol (PVA), and a fixed amount of hyperbranched polyamide amine (PAMAM). This film showed remarkable antimicrobial activity against food-borne bacteria and improved the preservation time of coated cheddar cheese samples up to 4 weeks compared to other samples.
SCIENTIFIC REPORTS
(2023)
Article
Biochemistry & Molecular Biology
Abdelfattah Darwish, Naglaa Salem El-Sayed, Sherief A. Al Kiey, Samir Kamel, Gamal Turky
Summary: This study investigates the dielectric behavior of a polyanionic electrically conductive superabsorbent hydrogel based on sodium alginate-g-poly(AM-co-ECA-co-AMPS) using broadband dielectric spectroscopy (BDS). It reveals that the dielectric spectra show three distinctive processes: electrode polarization, charge carrier's transport, and a molecular relaxation process. The effects of temperature and reduced graphene oxide (rGO) content are analyzed, and the results suggest the potential application of the hydrogel in forms of energy storage such as supercapacitors. The composite hydrogel with 2.5% rGO content exhibits excellent electrochemical capabilities.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Physics, Applied
M. Abdel-Baki, Ayman M. M. Mostafa, A. M. Fayad, Gehan T. T. El-Bassyouni, Gamal M. M. Turky
Summary: A new magnesium borate glass is prepared and the impact of dopant and co-dopant on the glass properties is investigated. The replacement of B2O3 by MgO affects the optical and electrical properties, leading to an increase in refractive index and a decrease in bandgap energy. The glass shows varying ac-conductivity and metallization criterion, while the concentration of MgO does not have a systematic effect on conductivity. The prepared glass is recommended for optical signal-processing equipment and is considered promising as a member of the nonlinear optical glass.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
H. M. Abomostafa, A. S. Abouhaswa, G. M. El-Komy, Diaa-Eldin A. Mansour, G. M. Turky
Summary: This paper investigates the use of Dysprosium doped Barium Strontium Titanate (Dy-BST) ceramic nanoparticles as fillers in polyvinylidene fluoride (PVDF) based nanocomposites. The impact of Dy-BST nanoparticle contents on the microstructure, dielectric, and breakdown strength properties of the nanocomposites were examined. The results showed that the proposed nanocomposites with Dy-BST nanoparticles have promising potential for high energy density applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Analytical
Sarah-Luise Abram, Paul Mrkwitschka, Andreas F. Thuenemann, Joerg Radnik, Ines Haeusler, Harald Bresch, Vasile-Dan Hodoroaba, Ute Resch-Genger
Summary: The rational design and increasing industrial use of nanomaterials require accurate characterization of their properties. Therefore, nanoscale reference materials (nanoRMs) are needed to validate characterization methods. This study developed a small iron oxide nanocube nanoRM to complement existing spherical nanoRMs. The nanoRM was characterized using transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS). The certified size parameters, determined with high precision, can be used for quality control of nanomaterial sizing methods. The production of this new iron oxide nanocube RM is an important achievement for the nanomaterial community, manufacturers, and regulators.
ANALYTICAL CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Adel A. Koriem, M. E. Abd El-Aziz, Samaa R. Salem, Ahmed I. Hussain, Gamal Turky
Summary: This study investigates the use of modified biochar (MBi) and carbon black (CB) as fillers in nitrile butadiene rubber (NBR) composites. The results show that MBi improves the dispersion and mechanical properties of the composites, without adversely affecting conductivity. This research provides a new avenue for the development of eco-friendly products.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Physics, Multidisciplinary
F. Mohamed, M. Abdel Rehim, Talaat A. Hameed, G. Turky
Summary: Polypyrrole (PPy) and poly(3-hexylthiophene) (P3HT) were prepared by oxidation polymerization, and their optical and dielectric properties were investigated. PPy has a smaller band gap and lower refractive index compared to P3HT. The conductivity of the polymers is significantly enhanced after polymerization, and the temperature dependence of conductivity follows the Vogel-Fulcher-Tammann equation.
Article
Chemistry, Multidisciplinary
Jana Hildebrandt, Andreas Taubert, Andreas F. Thuenemann
Summary: We report on the synthesis and characterization of long-term stable gold clusters consisting of approximately 62 gold atoms and with a diameter of 1.15 +/- 0.10 nm. The clusters were successfully synthesized by mixing tetrachloroauric acid with an ionic liquid at specific temperatures. Characterization was performed using various analytical techniques, and a three-stage model was proposed to explain the growth process of the clusters.
Article
Chemistry, Multidisciplinary
Abdelrahman A. A. Badawy, Mona H. Abdel H. Rehim, Gamal M. M. Turky
Summary: This study investigates the synthesis of a water remediation material by doping graphitic carbon nitride (g-C3N4) with CeO2 using two different techniques. The chemical structures and morphology of the doped samples were analyzed, and charge transport was studied using broadband spectroscopy. The adsorption capacity of doped g-C3N4 for heavy metals was thoroughly investigated under different parameters. The results showed that the doping mode strongly influenced the adsorption capacity, with the first mode achieving high adsorption for Pb2+ and Cd2+. The study also demonstrated the efficient recovery of heavy metal ions from the sorbents.
