A5074551069- Advanced Polymer Synthesis and Characterization
- Polymer Surface Interaction Studies
- Photopolymerization techniques and applications
- Surface Modification and Superhydrophobicity
- Fuel Cells and Related Materials
- Polymer composites and self-healing
- Conducting polymers and applications
- biodegradable polymer synthesis and properties
- Supercapacitor Materials and Fabrication
- Molecular Junctions and Nanostructures
- Analytical Chemistry and Sensors
- Advanced Sensor and Energy Harvesting Materials
- Dendrimers and Hyperbranched Polymers
- Electrocatalysts for Energy Conversion
- Synthetic Organic Chemistry Methods
- Covalent Organic Framework Applications
- Advanced Battery Materials and Technologies
- Radioactive element chemistry and processing
- Non-Destructive Testing Techniques
- Catalytic Processes in Materials Science
- Chemistry and Chemical Engineering
- Engine and Fuel Emissions
- Metal-Organic Frameworks: Synthesis and Applications
- Mining and Industrial Processes
- Renewable energy and sustainable power systems
University of Bath
2019-2025
Atomic Weapons Establishment
2020-2023
Carnegie Mellon University
2016-2019
University of Twente
2018-2019
Institute of Polymers
2019
Institute of Nanotechnology
2019
Jagiellonian University
2011-2016
University of Łódź
2004
Mussel-inspired polydopamine (PDA) chemistry was employed for the surface modification of ordered mesoporous carbons (OMCs), improving hydrophilicity, binding ability toward uranium ions, as well enriching chemical reactivity diverse postfunctionalization by either grafting or surface-initiated polymerization. Uniform PDA coating deposited on CMK-3 type OMCs via self-polymerization dopamine under mild conditions. Surface properties and morphology PDA-coated can be tailored adjusting...
An aqueous-based approach for the scalable synthesis of nitrogen-doped porous carbons with high specific surface area (SSA) and nitrogen content is presented. Low molecular weight polyacrylonitrile (PAN) solubilized in water presence ZnCl2 that also acts as a volatile porogen during PAN pyrolysis to form mesoporous structures significantly increased SSA. By templating commercial SiO2 nanoparticles, nanocellulose fillers or filter paper, nanocarbons SSA = 1776, 1366, 1501 m2/g, respectively...
This work presents a novel shear-dependant, smart layer consisting of polyborosiloxane (PBS)-based Shear Stiffening Gel (SSG), encapsulated in crosslinked vinyl-terminated polydimethylsiloxane (VPDMS), acting as protective on the surface Carbon Fibre Reinforced Polymer (CFRP) laminates reducing impact damage. The frequency-dependant reversible network structure PBS acts dynamic responding energy absorption medium (DrEAM), able to autonomously stiffen response an external stimulus. Low...
We report the preparation of degradable polymer networks by conventional free radical copolymerization n-butyl acrylate with a crosslinker (1 mol %) and dibenzo[c,e]oxepane-5-thione (DOT) as strand-cleaving comonomer. Addition only 4 % DOT imparts synthesized full degradability aminolysis, whereas gels less (2–3 cannot be degraded. This data confirms recently proposed reverse gel-point model for prepared polymerization demonstrates importance considering kinetics when designing fully gels....
A series of polyacrylonitrile-block-poly(butyl acrylate) (PAN-b-PBA) copolymers were prepared by supplemental activator reducing agent atom transfer radical polymerization (SARA ATRP). These then used as precursors to pyrolytic nanostructured carbons with the PAN block serving a nitrogen-rich carbon and PBA acting sacrificial porogen. The study revealed that while size mesopores can be controlled porogenic block, connectivity pores diminishes decrease overall molecular weight precursor. This...
Copolymer-templated nitrogen-doped carbon (CTNC) films deposited on glassy were used as electrodes to study electrochemically driven hydrogen evolution reaction (HER) in 0.5 M H2SO4. The activity of these materials was extremely enhanced when a platinum counter electrode instead graphite rod and reached the level commercial Pt/C electrodes. Postreaction scanning electron microscopy (SEM) X-ray photoelectron spectroscopy (XPS) measurements surfaces revealed that incorporation even low amounts...
Polymers with tailored architectures and degradability were prepared through thiocarbonyl addition ring-opening (TARO) atom-transfer radical polymerization (ATRP) using dibenzo[c,e]oxepin-5(7H)-thione (DOT), Cu(I)Br, tris[2-(dimethylamino)ethyl]amine (Me6TREN) as the thionolactone, catalyst, ligand, respectively, in combination a selection of acrylic comonomers. Although copolymers selectively degradable backbone thioesters low dispersities (1.10 ≤ D̵ 1.26) achieved DMSO, acetonitrile, or...
We report the synthesis of ultra-high molecular weight (UHMW) poly(N,N-dimethylacrylamide) (PDMAm) hydrogels with extremely low crosslinking densities by trithiocarbonate photoiniferter-mediated reversible deactivation radical polymerization (RDRP). Fixing photoiniferter to crosslinker ratio and gradually increasing targeted degree (DPtarget) allowed for simultaneous control over density average (Mn) primary chains, both below above critical entanglement (Mc). Interestingly, a plateau in...
We report the synthesis of ultra‐high molecular weight (UHMW) poly(N,N‐dimethylacrylamide) (PDMAm) hydrogels with extremely low crosslinking densities by trithiocarbonate photoiniferter‐mediated reversible deactivation radical polymerization (RDRP). Fixing photoiniferter to crosslinker ratio and gradually increasing targeted degree (DPtarget) allowed for simultaneous control over density average (Mn) primary chains, both below above critical entanglement (Mc). Interestingly, a plateau in...
We report the synthesis of ultra‐high molecular weight (UHMW) poly(N,N‐dimethylacrylamide) (PDMAm) hydrogels with extremely low crosslinking densities by trithiocarbonate photoiniferter‐mediated reversible deactivation radical polymerization (RDRP). Fixing photoiniferter to crosslinker ratio and gradually increasing targeted degree (DPtarget) allowed for simultaneous control over density average (Mn) primary chains, both below above critical entanglement (Mc). Interestingly, a plateau in...
Polyacrylonitrile (PAN) homopolymer and polyacrylonitrile-block-poly(n-butyl acrylate) (PAN-b-PBA) block copolymer were synthesized via supplemental activator reducing agent atom transfer radical polymerization used as precursors to nitrogen-doped nanocarbons. Carbonization was performed at two different temperatures (500 800 °C) fabricate nanocarbons with structural properties nitrogen contents. Copolymer-templated carbons (CTNCs) had larger surface area higher mesoporosity than PAN...
The influence of the cleavable bond location on degradation and reformation poly( n -butyl acrylate) networks synthesised by RAFT polymerisation was investigated revealed that backbones lead to more efficient network reversibility.
Acrylonitrile (AN) was polymerized by initiators for continuous activator regeneration (ICAR) atom transfer radical polymerization (ATRP). The effect of the ligand, tris(2-pyridylmethyl)amine (TPMA) and N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN), in Cu-based catalyst, amount several alkyl halide initiators, targeted degree polymerization, azobisisobutyronitrile (AIBN) added were studied. It determined that best conditions utilized 50 ppm CuBr2/TPMA as catalyst...
While nanocarbons doped with more than one heteroatom continue attracting growing interest owing to a wide range of applications, precise control their nanostructure and porosity remains major challenge. Herein, we report new route synthesize N/S co-doped through introduction sulfur into the synthesis copolymer-templated nitrogen-enriched carbons (CTNC). Sulfur served as both source morphology stabilizing agent. The produced showed interconnected pores relatively high specific surface area...
We investigated gelation in photoinduced atom transfer radical polymerization (ATRP) as a function of Cu catalyst loading and thus primary chain dispersity. Using parallel polymerizations methyl acrylate with without the addition divinyl crosslinker (1,6-hexanediol diacrylate), approximate values molecular weights dispersities chains at incipient were obtained. In accordance Flory–Stockmayer theory, experimental occurred gradually lower conversions when dispersity increased while maintaining...
Controlled radical polymerization of acrylonitrile (AN) in concentrated aqueous solutions sodium thiocyanate (NaSCN, 50 wt %) and zinc chloride (ZnCl2, 60 is reported. Reversible addition–fragmentation chain transfer (RAFT) was successfully accomplished with 4-cyano-4-(phenylcarbonothioylthio)pentanoic acid (CPAD) as a agent (CTA) AIBN initiator at 65 °C. First-order linear kinetic plots were observed NaSCN molecular weights (MW) between 3000 000 relatively narrow weight distributions (Mw/Mn...
A robust approach for modification of TiO2 nanoparticles with polymer brushes by atom transfer radical polymerization (ATRP) is presented. surface was first coated polydopamine (PDA) followed immobilization an ATRP initiator, α-bromoisobutyryl bromide (BiBB). Poly(methyl methacrylate) (PMMA) and poly(butyl acrylate) (PBA) were then grafted from the PDA-modified different size (25 300 nm) in DMF at room temperature via supplemental activator reducing agent (SARA) using only 100 ppm copper...
Abstract Herein is described the switchable fluorescence response of poly(methyl methacrylate) (PMMA) brushes. Chain end fluorescein labeled PMMA brushes are prepared by combining surface‐initiated atom transfer radical polymerization (SI‐ATRP) with a copper‐catalyzed alkyne‐azide cycloaddition (CuAAC) click reaction. Successful attachment confirmed measuring as‐prepared films. Utilizing co‐solvency in isopropanol‐water mixtures, responsive behavior end‐functionalized demonstrated changes...
Well-defined mesoporous carbon/poly(glycidyl methacrylate) (PGMA) hybrids were prepared by surface-initiated atom transfer radical polymerization (SI-ATRP) from carbons with different steric configurations and structural properties. In the initial step, a robust polydopamine (PDA) layer was deposited on surface of exploiting strong π–π interaction between PDA aggregates carbonaceous surface, which facilitated immobilization initiator molecules. PGMA brushes then grown using initiators for...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTOrganosilica with Grafted Polyacrylonitrile Brushes for High Surface Area Nitrogen-Enriched Nanoporous CarbonsJianan ZhangJianan ZhangDepartment of Materials Science and Engineering Department Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United StatesSchool Chemistry Chemical Engineering, Anhui University Province Key Laboratory Environment-friendly Polymer Materials, Hefei 230601, ChinaMore by Jianan...
Polyacrylonitrile (PAN) brushes were grafted from silicon wafers by photoinduced ATRP and shown to exhibit aggregation-induced emission (AIE) properties.
The preparation of patterned ultrathin films (sub-10 nm) composed end-anchored fluorescently labeled poly(methyl methacrylate) (PMMA) is presented. Telechelic PMMA was synthesized utilizing activator regenerated by electron transfer atom radical polymerization and consecutively end-functionalized with alkynylated fluorescein Cu-catalyzed azide–alkyne cycloaddition (CuAAC) "click" chemistry. polymers were grafted via the α-carboxyl groups to silica or glass substrates pretreated...