Article
Chemistry, Multidisciplinary
D. F. Grishin, I. P. Kriulichev, M. V. Pavlovskaya, I. D. Grishin
Summary: In this study, reversible-deactivation radical copolymerization of stearyl methacrylate with glycidyl methacrylate was conducted using atom transfer radical polymerization mechanism. The synthesized copolymers were tested as complex additives for eco-friendly diesel fuel, showing improved low-temperature parameters, thermo-oxidative stability, and lubricating properties.
Review
Chemistry, Multidisciplinary
Glen R. Jones, Hyun Suk Wang, Kostas Parkatzidis, Richard Whitfield, Nghia P. Truong, Athina Anastasaki
Summary: Controlled polymerization methods allow for the precise design and preparation of polymeric materials. Recent work has shown that these methods also enable depolymerization of polymers under mild conditions. This perspective focuses on depolymerization from polymers synthesized by controlled polymerizations, such as radical, ionic, and metathesis polymerizations, and explores concepts to enhance depolymerization.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Hans Kuzmany, Lei Shi, Miles Martinati, Sofie Cambre, Wim Wenseleers, Jeno Kurti, Janos Koltai, Gergo Kukucska, Kecheng Cao, Ute Kaiser, Takeshi Saito, Thomas Pichler
Summary: This study demonstrates a method for synthesizing 6- and 7-armchair graphene nanoribbons with widths of 0.61 and 0.74 nm and excitonic gaps of 1.83 and 2.18 eV by high-temperature vacuum annealing of ferrocene molecules inside single-walled carbon nanotubes. The growth process is confirmed by atomic resolution electron microscopy, while the structure is identified through Raman scattering characterization and quantum-chemical calculations.
Article
Polymer Science
Miroslav Janata, Eva Cadova, Jeffery W. Johnson, Vladimir Raus
Summary: This study investigates the application of low-molecular weight solvent-borne functional (meth)acrylic polymers in coating resins and explores the possibilities of reducing catalyst levels in copper-mediated reversible-deactivation radical polymerization and atom transfer radical polymerization.
JOURNAL OF POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Qingwen Cao, Qiong Wu, Lin Dai, Xiaojun Shen, Chuanling Si
Summary: Through structural analysis, it is found that the strength and toughness of lignin-filled polymer blends (PMMA/L-g-PMMA) can be effectively adjusted by regulating the molecular weights, types and contents of S/G units, and flexible/rigid linkages in lignin macromolecules. This study not only provides a simple and effective strategy to overcome the heterogeneity of lignin, but also paves the way for high-value utilization of lignin on a broader scale.
Article
Engineering, Chemical
Zykamilia Kamin, N. Abdulrahim, M. Misson, C. K. Chiam, R. Sarbatly, D. Krishnaiah, A. Bono
Summary: The study revealed that nanofibers can serve as templates to induce a porous structure in a monolith. Process conditions designed by RSM were found to be effective in controlling fiber diameter, leading to successful fabrication of macropore monoliths.
CHEMICAL ENGINEERING COMMUNICATIONS
(2021)
Article
Green & Sustainable Science & Technology
Eman A. El Desouky, Emad A. Soliman, Hessa H. Al-Rasheed, Ayman El-Faham, M. A. Abu-Saied
Summary: Novel proton exchange membranes (PEMs) based on a composite of sulfonated polyacrylonitrile (SPAN), sulfonated polyglycidyl methacrylate (SPGMA), or sulfonated poly(acrylonitrile-co-glycidyl methacrylate) (SP(AN-co-GMA))/polyvinyl chloride (PVC) were developed for direct methanol fuel cells (DMFCs). The study found that the composite membranes based on sulfonated copolymers had higher thermal stability and ion exchange capacity than the composites based on sulfonated homopolymers.
Article
Chemistry, Physical
Mostafa I. Qassim, Mostafa M. H. Khalill, Ashraf A. Hamed, Mohamed A. Gizawy, E. R. Atta, A. El -Hag Ali
Summary: Glycidyl Methacrylate (GMA) was grafted onto Polycarbonate (PC) using a radiation-induced grafting technique, followed by amination and quaternization to synthesize Q[A(PC-g-PGMA)]. The effects of total concentration, monomer concentration, and absorbed dosage on the degree of grafting (DG) were studied. The structure of the resultant Q[A(PC-g-PGMA)] was characterized using FTIR, SEM, and TGA. Q[A(PC-g-PGMA)] was used in a batch procedure to investigate the sorption efficiency of I-131 in varied concentrations of HCl and/or HNO3 solutions. The thermodynamic parameters indicated that the sorption process of I-131 was endothermic and spontaneous.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Aminreza Khodabandeh, R. Dario Arrua, Stuart C. Thickett, Emily F. Hilder
Summary: This study investigates a novel reversible addition-fragmentation chain transfer (RAFT) polymerization method for the fabrication of porous polymers with well-defined porous morphology and surface chemistry. By controlling the polymerization conditions precisely, porous monolithic columns suitable for liquid separation of biomolecules were successfully designed and synthesized.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Ceramics
Ivan S. Stefanovic, Bojana M. Markovic, Aleksandra B. Nastasovic, Zorica M. Vukovic, Aleksandra Dapcevic, Vladimir B. Pavlovic
Summary: The impact of the type and amounts of nanofiller on the features of GMA-co-EGDMA/OMt nanocomposites was examined. It was found that the addition of clay nanofillers can modify the porosity parameters of the nanocomposites, making them suitable for specific purposes.
SCIENCE OF SINTERING
(2022)
Article
Polymer Science
Valentin Monjal, Alexis Moreno, David Glueck, Sandro Keller, Pierre Guillet, Gregory Durand
Summary: In this study, a series of amphiphilic methacrylate copolymers were synthesized. By varying the monomer ratio, membrane proteins were extracted and provided with a stabilizing environment.
JOURNAL OF POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Shuai Sun, Nana Deng, Hongbin Zhang, Lianfang He, Haiping Zhou, Baokun Han, Kuidong Gao, Xin Wang
Summary: In this study, a novel fine-grained AZ31 magnesium (Mg) alloy reinforced with sub-micron vanadium particles (V-P) was successfully prepared by powder metallurgy. The composite exhibited competitive mechanical properties with improved microhardness, yield strength, ultimate tensile strength, and elongation. The strengthening mechanisms of grain boundary strengthening, thermal mismatch, Orowan strengthening, and load transfer contributed to the improvement of strength, while the fracture mechanism included both ductile and brittle modes.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Polymer Science
Mohamed R. El-Aassar, Tamer M. Tamer, Mohamed Y. El-Sayed, Ahmed M. Omer, Ibrahim O. Althobaiti, Mohamed E. Youssef, Rawan F. Alolaimi, Emam F. El-Agammy, Manar S. Alruwaili, Mohamed S. Mohy-Eldin
Summary: In this study, a novel adsorbent for water treatment applications was developed by immobilizing MB onto polymer composites. The effect of copolymer composition and sulphonation on the MB content was investigated, and it was found that SPGMA-co-PMMA displayed the highest MB content. The chemical structure and morphology of the developed composites were characterized using various techniques. The developed MB-SPGMA composite showed promising results in removing Cr (VI) and Mn (VII) ions from contaminated waters.
Article
Engineering, Biomedical
Meiling Li, Cheng Zheng, Binggang Wu, Kailei Ding, Shumang Zhang, Xueyu Huang, Yang Lei, Yunbing Wang
Summary: The study demonstrated that platelet adhesion decreased by 35% in GMA-crosslinked swim bladders compared to glutaraldehyde-crosslinked ones. The superior anticoagulant property of GMA-SBs was further confirmed in the ex vivo arteriovenous shunt assay. Subcutaneous implantation in rats showed that GMA-SBs effectively inhibited calcification compared to GLUT-SBs.
JOURNAL OF BIOMATERIALS APPLICATIONS
(2022)
Article
Engineering, Chemical
Y. T. Zhang, S. K. Lai, Jerry C. W. Yu, H. Guo, C. W. Lim
Summary: Acoustic manipulation is a non-contact process that uses acoustic waves to immobilize particles for various applications. The development of a U-shaped resonant acoustic chamber as a pre-filtering device shows promise in improving filtration efficiency and optimizing spatial homogeneity for airborne particles. Experimental studies have demonstrated up to 89% filtration efficiency for 1.0-mu m particles, and up to 61% filtration efficiency for sub-micron particles with a lower sound pressure level.