A5060314651- Advanced Polymer Synthesis and Characterization
- Dendrimers and Hyperbranched Polymers
- biodegradable polymer synthesis and properties
- Synthesis and properties of polymers
- Polymer Surface Interaction Studies
- Block Copolymer Self-Assembly
- Photopolymerization techniques and applications
- Synthetic Organic Chemistry Methods
- Luminescence and Fluorescent Materials
- Conducting polymers and applications
- Silicone and Siloxane Chemistry
- RNA Interference and Gene Delivery
- Nanoparticle-Based Drug Delivery
- Polymer Nanocomposites and Properties
- Surfactants and Colloidal Systems
- Fuel Cells and Related Materials
- Organometallic Complex Synthesis and Catalysis
- Carbon Nanotubes in Composites
- Polymer crystallization and properties
- Chemical Synthesis and Analysis
- Innovative Microfluidic and Catalytic Techniques Innovation
- Hydrogels: synthesis, properties, applications
- Polyoxometalates: Synthesis and Applications
- Mesoporous Materials and Catalysis
- Epoxy Resin Curing Processes
University of Science and Technology of China
2013-2022
Hefei University
2011-2021
Hefei National Center for Physical Sciences at Nanoscale
2018-2019
Chinese Academy of Sciences
2004-2016
Xidian University
2011
Hefei University of Technology
2004-2010
Beijing National Laboratory for Molecular Sciences
2008
Tsinghua University
2007-2008
Drexel University
2008
Institute of Chemistry
2008
Differently from bulk, solution, suspension, emulsion, and miniemulsion polymerizations, the controlled radical dispersion polymerization (CRDP) demonstrates self-assembly of block copolymers formed in homogeneous system, forming various kinds micelles or vesicles. Thus, this technology can prepare both polymeric aggregates directly. Among CRDP, reversible addition-fragmentation chain transfer (RAFT) has been studied relative detail successfully developed to a diverse range assemblies....
A simple and facile strategy has been developed for synthesis of nanomaterials viapolymerization in high concentration; multiple morphologies can be created tuned just by variation the feed ratio reaction conditions.
Although photoluminescence of tertiary aliphatic amines has been extensively studied, the usage this fundamental chromophore as a fluorescent probe for various applications unfortunately not realized because their uncommon fluorescence is easily quenched, and strong observed only in vapor phase. The objective study how to retain polymers. Tertiary branching units hyperbranched poly(amine-ester) (HypET) display relatively (Φ = 0.11–0.43). linear polymers with backbone or side group are very...
The development of controlled/“living” polymerization greatly stimulated the prosperity fabrication and application block copolymer nano-objects.
Water-soluble multiwalled carbon nanotubes (MWNTs) with temperature-responsive shells were synthesized by grafting poly(N-isopropylacrylamide) (PNIPAAM) from sidewall of MWNT via surface reversible addition and fragmentation chain transfer (RAFT) polymerization using RAFT agent functionalized as agent. Carboxylic groups on formed nitric acid oxidation. Then bromoisobutyrate covalently attached to the esterification 2-hydroxyethyl-2'-bromoisobutyrate carboxylic groups, forming (MWNT-Br). was...
The assembly behavior of diblock copolymers in solution can be modulated by block length, ratio, solvent properties, and preparation route. Different morphologies such as spherical micelles, cylindrical vesicles, large compound vesicles have been obtained for with shorter solvated block, poly(acrylic acid)-b-polystyrene (PAA-b-PSt). In the present work, we reported an easy-going route to prepare PAA-b-PSt assemblies different through reversible addition−fragmentation-transfer (RAFT)...
Mesoporous silica nanoparticles (MSNs) are considered for potential scaffoldings in drug delivery due to their good biocompatibility and large pore volume, it is the focus find a suitable gatekeeper mesopores. In this paper, reliable versatile method of surface-initiated atom transfer radical polymerization (SI-ATRP) has been employed prepare hybrid poly(2-(diethylamino)ethyl methacrylate)-coated MSNs (MSN-PDEAEMA). The resultant with pH-sensitive polymer shell MSN core were characterized by...
Cellulose-graft-poly(N,N-dimethylamino-2-ethyl methacrylate) (cellulose-g-PDMAEMA) copolymers were prepared by homogeneous atom transfer radical polymerization (ATRP) under mild conditions. Cellulose macroinitiator was successfully synthesized direct acylation of cellulose with 2-bromopropionyl bromide in a room temperature ionic liquid (RTIL), 1-allyl-3-methylimidazolium chloride. Copolymers obtained via ATRP N,N-dimethylamino-2-ethyl methacrylate (DMAEMA) CuBr/...
A novel strategy for preparation of multiple nanostructural materials, which is the creation such materials directly from controlled radical dispersion polymerization in one pot, has been developed. In formation polymeric nanomaterials, chain length ratio hydrophobic to hydrophilic blocks altered continuously, induces two phase transitions, separation form spherical micelles and re-organization resulting spheres yield morphologies including nanorods, nanotubes, vesicles doughnuts. This quite...
A facile and versatile method to prepare mesoporous core-shell nanostructures with a reversibly switchable nanoshell is reported. Reversible addition-fragmentation chain transfer (RAFT) functionalities were anchored the exterior surface of silica nanoparticles (MSNs), forming RAFT agent coated MSNs. polymerization was then conducted graft poly(acrylic acid) (PAA) shell onto MSNs, producing novel smart nanocontainers MSN as container pH-responsive PAA nanovalve. The nanovalve can control...
Abstract A novel nanocontainer, which could regulate the release of payloads, has been successfully fabricated by attaching zwitterionic sulfobetaine copolymer onto mesoporous silica nanoparticles (MSNs). RAFT polymerization is employed to prepare hybrid poly(2‐(dimethylamino)ethyl methacrylate)‐coated MSNs (MSN‐PDMAEMA). Subsequently, tertiary amine groups in PDMAEMA are quaternized with 1,3‐propanesultone get poly(DMAEMA‐ co ‐3‐dimethyl(methacryloyloxyethyl)ammonium...
The self-assembly of block copolymers attracts wide interest due to many potential applications the polymeric aggregates. Great effort has been made realize convenient fabrication abundant materials with well-defined nanostructures. This review introduces development in situ preparation copolymer aggregates by heterogeneous polymerization. emphasis is put on discussing formation mechanism different morphologies. Some important factors that influence morphologies are illustrated when...
Conventional polymers of nonfluorescent monomers show strong fluorescence without incorporating any fluorescent agent. The intensity photoluminescence these is similar to that emitted by conventional fluorophore-containing polymers. This finding offers a simple yet versatile platform prepare using molecules.
A highly efficient strategy, polymerization-induced self-assembly (PISA) for fabrication of the polymeric drug delivery systems in cancer chemotherapy is reported. Diblock prodrug copolymer, PEG-b-P(MEO2MA-co-CPTM) was used as macro-RAFT agent to fabricate nanoparticles through PISA. The advantages fabricating intelligent system via this approach are following: (1) Simultaneous fulfillment polymerization, self-assembly, and encapsulation one-pot at relatively high concentration (100 mg/mL);...
Polymerization-induced self-assembly (PISA) has been established as a powerful strategy for fabrication of polymeric nano-objects in the past decade. However, comparison with traditional method, PISA is unsatisfactory preparation vesicles chemical versatility membrane-forming block tunable membrane properties, which limits further application PISA-based vesicles. Besides stimuli-responsive property, structural integrity another important concern material applications. In situ cross-linking...
A special kind of reversible addition−fragmentation chain transfer (RAFT) agent with two ending hydroxy groups, S, S'-bis(2-hydroxyethyl-2'-butyrate) trithiocarbonate (BHBT), was successfully synthesized by using polymeric supports. BHBT can act not only as initiating centers in polymerization lactide tin(II) 2-ethylhexanoate catalyst but also an efficient RAFT polymerization. The thermally sensitive and biodegradable block copolymers, poly(lactide-b-N-isopropylacrylamide-b-lactide)...
The polymerizations of styrene (St), methyl acrylate (MA), and butyl (BuA), carried out under UV irradiation at room temperature in the presence dibenzyl trithiocarbonate (DBTTC) were found to display living free-radical polymerization characteristics as evidenced by: narrow molecular weight distribution, linear increase with increasing conversion, well-controlled weight, first-order kinetics. triblock copolymer, PMA-PSt-PMA, polydispersity well-defined structure was successfully prepared...
The reversible addition−fragmentation transfer (RAFT) polymerizations of 4-vinylpyridine (4VP) in tetrahydrofuran (THF) and cyclohexane with RAFT agent, dithiobenzoate-terminated polystyrene (PS−SC(S)Ph), involve one polymerization rate (Rp = 0.083 mol L-1 h-1) two stages 0.164 0.0024 h-1 before after 5 h), respectively. 4VP divinylbenzene (less than 10% relative to 4VP) THF led gelation, but the displayed clear solution consistently throughout polymerization, kinetic studies showed sudden...
Disulfide-functionalized hyperbranched poly(amido amine)s (HPAMAMs) were synthesized by Michael addition polymerization of N,N'-cystaminebisacrylamide and 1-(2-aminoethyl)piperazine. The novel HPAMAMs displayed bright fluorescence, the emissions bands cover nearly whole visible wavelength range. When polymer solutions excited at 330-385, 460-490, 510-550 nm, blue, green, red observed, respectively. are biodegradable they can be easily cleaved 2-mercaptoethanol or glutathione, leading to a...
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTMorphology Transition in RAFT Polymerization for Formation of Vesicular Morphologies One PotWen-Ming Wan, Xiao-Li Sun, and Cai-Yuan Pan*View Author Information Department Polymer Science Engineering, CAS Key Laboratory Soft Matter Chemistry, University Technology China, Hefei, Anhui 230026, P. R. China*Corresponding author. E-mail: [email protected]Cite this: Macromolecules 2009, 42, 14, 4950–4952Publication...