A5067703885- Advanced Polymer Synthesis and Characterization
- Synthesis of β-Lactam Compounds
- Conducting polymers and applications
- biodegradable polymer synthesis and properties
- Advanced Sensor and Energy Harvesting Materials
- Phenothiazines and Benzothiazines Synthesis and Activities
- Electrospun Nanofibers in Biomedical Applications
- Synthesis and Catalytic Reactions
- Fuel Cells and Related Materials
- Synthesis and properties of polymers
- Polymer composites and self-healing
- Polymer crystallization and properties
- Antibiotic Resistance in Bacteria
- Ionic liquids properties and applications
- Photopolymerization techniques and applications
- Organometallic Complex Synthesis and Catalysis
- Dendrimers and Hyperbranched Polymers
- Antimicrobial Resistance in Staphylococcus
- Bioactive Compounds and Antitumor Agents
- Dielectric materials and actuators
- Synthesis and Biological Evaluation
- Synthetic Organic Chemistry Methods
- RNA Interference and Gene Delivery
- Block Copolymer Self-Assembly
- Polymer Nanocomposites and Properties
Sanya University
2025
China Agricultural University
2025
Marshall University
2014-2024
Arizona State University
2008-2023
Virginia Tech
2011-2020
Interface (United States)
2008-2015
Weatherford College
2014
University of Georgia
2009-2013
University of Notre Dame
2009-2013
Waseda University
2009
Establishing clear structure−property−transfection relationships is a critical step in the development of clinically relevant polymers for nonviral gene therapy. In this study, we determined influence poly(2-dimethylaminoethyl methacrylate) (PDMAEMA) molecular weight on cytotoxicity, DNA binding, and vitro plasmid delivery efficiency human brain microvascular endothelial cells (HBMEC). Conventional free radical polymerization was used to synthesize PDMAEMA with weight-average weights ranging...
Siderophores are multidentate iron(III) chelators used by bacteria for iron assimilation. Sideromycins, also called siderophore-antibiotic conjugates, a unique subset of siderophores that enter bacterial cells via siderophore uptake pathways and deliver the toxic antibiotic in "Trojan horse" fashion. Sideromycins represent novel delivery technology with untapped potential developing sophisticated microbe-selective antibacterial agents limit emergence resistance. The chemical synthesis series...
Abstract The year 2020 marks the 100th anniversary of first article on polymerization, published by Hermann Staudinger. It is Staudinger who realized that polymers consist long chains covalently linked building blocks. Polymers have had a tremendous impact society ever since this initial publication. People live in world almost impossible to imagine without synthetic polymers. But what does future hold for polymer science? In article, editors and advisory board Macromolecular Chemistry...
Additive manufacturing (AM) of polymeric materials enables the complex structures for a wide range applications. Among AM methods vat photopolymerization (VP) is desired owing to improved efficiency, excellent surface finish, and printing resolution at micron-scale. Nevertheless, major portion resins available VP are based on systems with limited or negligible recyclability. Here, we describe an approach that resin amenable re-printing retained properties appearance. To end, take advantage...
A novel methodology for in situ cross-linking of polymeric fibers during electrospinning is described. The apparatus was modified to facilitate UV irradiation the electrospun while flight collector target. Three polymers with different mol % photoreactive cinnamate functional group (4, 9, and 13 %) were synthesized utilized this study. Fibers functionalized poly(methyl methacrylate-co-2-hydroxyethyl acrylate) cross-linked by electrospinning. Subsequent FTIR measurements on irradiated...
Hyperbranched polymers have received significant attention due to their unique combination of low viscosity, excellent solubility, and facile synthesis. This paper describes an efficient approach hyperbranched poly(aryl ester)s via the polycondensation A2 B3 monomers. A dilute bisphenol (A2) solution was added slowly a 1,3,5-benzenetricarbonyl trichloride (B3) at 25 °C prepare in absence gelation. The molar ratio A2:B3 maintained 1:1, maximum final monomer concentration ∼0.08 M. 1H NMR...
Block copolymer–ionic liquid composite materials emerge as promising candidates for electromechanical transducer applications. Herein, a novel imidazolium sulfonate-containing pentablock was prepared and fabricated into thermally stable electroactive actuators, which exhibit effective actuation response under low applied potential of 4 V.
Summary Alginate is an important polysaccharide that commonly used as a gelling agent in foods, cosmetics and healthcare products. Currently, all alginate commercially extracted from brown seaweed. However, with environmental changes such increasing ocean temperature the number of biotechnological uses alginates specific properties, there emerging need for more reliable customizable sources alginate. An alternative to seaweed production Pseudomonas aeruginosa , common Gram‐negative bacterium...
Functional oligomers based on glutathione (GSH) and poly(ethylene glycol) diacrylate (PEGDA) were synthesized via Michael addition. Well-defined, spherical nanoparticle self-assembly was confirmed dynamic light scattering transmission electron microscopy. In addition, a series of addition containing GSH prepared with various molecular weights (PEG). Thermal analysis indicated that the thermally stable to ∼160 °C, Tg increased as PEG weight increased. thiol-terminated reacted form...
We report the unprecedented controlled radical polymerization of 4-vinylimidazole (4VIM). Reversible addition–fragmentation chain transfer (RAFT) 4VIM in glacial acetic acid afforded homopolymers with well-defined molecular weights and narrow polydispersity indices (PDIs). The polymerizations mediated 4-cyano-4-(ethylsulfanylthiocarbonylsulfanyl)pentanoic (CEP) displayed linear pseudo-first-order kinetics weight growth monomer conversion. Systematic variation numerous parameters included...
Thiram and disulfiram were evaluated as antibacterial agents against multidrug-resistant Staphylococcus aureus Against a 30-member panel comprised of vancomycin-susceptible, vancomycin-intermediate, vancomycin-resistant S. strains, the MIC90 values respective test 4 16 μg/ml. Additional analyses revealed that thiram are rapid-acting bacteriostatic with narrow, Gram-positive-bacterium spectrum activity. Synergy studies further determined increases vancomycin susceptibility three clinical...
Production of 3-acetamido-5-acetylfuran from renewable chitin resources.
Zwitterionomers containing less than 13 mol % zwitterion functionality were synthesized using free radical copolymerization of n-butyl acrylate (nBA) and sulfobetaine monomers. X-ray scattering results revealed a two-phase morphology, which is typical random ionomers with an ionomer peak at q ∼1.5 nm−1. Swelling studies in the ionic liquid (IL), 1-ethyl-3-methylimidazolium ethylsulfate (EMIm ES), showed influence zwitterionic structure on IL uptake. Zwitterionomer membranes swollen to...
Controlled radical polymerization (CRP) allows for the design and synthesis of functional polymers with tailored composition unique macromolecular architectures. Synthetic methods that are readily available controlled include nitroxide-mediated polymerization, reversible addition–fragmentation chain transfer atom polymerization. N-Vinyl monomers typically amenable to free often difficult synthesize in a manner high molecular weight due lack resonance stabilization propagating radical....
Step-growth polymerization of ditertiary phosphines with dibromoalkanes enabled the synthesis novel phosphonium ionenes. In situ FTIR spectroscopy monitored increase in absorbance as a function time at 1116 cm−1, which corresponded to polymeric P+–Ph stretch. Aqueous size-exclusion chromatography (SEC) provided absolute molecular weights and confirmed expected weight growth for difunctional, step-growth polymerization. Phosphonium ionenes exhibited improved thermal base stability compared...
Abstract Copolymers of n ‐butyl acrylate and phosphonium ionic liquid monomers possessing various alkyl substituents counterions were synthesized through a combination conventional free radical copolymerization anion exchange. Differential scanning calorimetry dynamic mechanical analysis provided the thermal properties these cation‐containing random copolymers. Factors including chain length substituents, counterion type, as well concentration significantly influenced association cations....
RAFT polymerization afforded acrylic ABC triblock copolymers with self-complementary nucleobase-functionalized external blocks and a low-<italic>T</italic><sub>g</sub> soft central block.