A5101635080- Advanced Polymer Synthesis and Characterization
- Polymer composites and self-healing
- Hydrogels: synthesis, properties, applications
- Conducting polymers and applications
- Polymer Surface Interaction Studies
- Marine Sponges and Natural Products
- Silicone and Siloxane Chemistry
- Photochromic and Fluorescence Chemistry
- Advanced Materials and Mechanics
- Synthesis and properties of polymers
- Nanoparticle-Based Drug Delivery
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Mass Spectrometry Techniques and Applications
- Polyoxometalates: Synthesis and Applications
- Epoxy Resin Curing Processes
- Supramolecular Self-Assembly in Materials
- Electrospun Nanofibers in Biomedical Applications
- Surfactants and Colloidal Systems
- Dendrimers and Hyperbranched Polymers
- Photopolymerization techniques and applications
- Atomic and Molecular Physics
- Supramolecular Chemistry and Complexes
- Micro and Nano Robotics
- Surface Modification and Superhydrophobicity
Chengdu Organic Chemicals (China)
2014-2024
Chinese Academy of Sciences
2014-2024
University of Chinese Academy of Sciences
2015-2024
Northwest Normal University
2023-2024
China Southern Power Grid (China)
2021-2022
Chengdu University
2015-2019
Hohai University
2013
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation
2012
University of Pennsylvania
2000-2006
Henan University of Technology
2006
Multiple-shape memory effects (SME) from dual to quintuple are realized in PMMA/PEG semi-interpenetrating polymer networks containing broadened glass transition and crystalline segments, which provide multi-gradient temperatures an additional melting temperature as for multi-step shape fixation recovery a single cycle. Especially, the quintuple-SME is achieved polymeric material first time.
Abstract Degradable shape memory polymers (SMPs), especially for polyurethane‐based SMPs, have shown great potential biomedical applications. How to reasonably fabricate SMPs with the ideal combination of degradability, reconfigurability, and reprocessability is a critical issue remains challenge medical disposable materials. Herein, poly(urethane‐urea) synergetic triple dynamic covalent bonds reported via embedding polycaprolactone unit into hindered urea bond. The single polymer network...
Abstract Summary: A well‐dispersed gold nanoparticle/poly( N ‐isopropylacrylamide) (PNIPAm) hydrogel nanocomposite with thermoswitchable electrical properties is prepared by the copolymerization of functional Au nanoparticles ‐isopropylacrylamide. It found that conductivity changes two orders magnitude at moderate temperature ( T tran ) upon stimuli. The change reversible during a heating and cooling cycle. Schematic illustration mechanism thermo‐switchable electronic nanoparticle/PNIPAm...
In this paper, polymer nanocapsules embedded with noble metal nanoparticles and showing a good catalytic activity were prepared by novel convenient method.
Abstract Epoxy resins, ubiquitous and indispensable thermosetting material in various industries, suffer from the resistance to crack initiation, poor ductility, irreparable permanent cross‐linked network, which hinder their utilization high‐performance applications are detrimental development of a sustainable economy. However, achieving trade‐off between toughness, robustness, reprocessability epoxy resins remains formidable challenge. Herein, an resin that combines ultratoughness, by...
Abstract Summary: This communication describes a novel kind of PMMA‐PEG semi‐interpenetrating network (semi‐IPN) which shows excellent shape‐memory behavior at two transition temperatures, the T m PEG crystal and g semi‐IPN. Based on reversible order‐disorder crystals below above PEG, large difference in storage modulus semi‐IPN, polymer has recovery ratio 91 99%, respectively. Shape‐memory phenomena PMMA‐PEG2000 magnified image
The water dispersion of poly-N-isopropylacrylamide hybrid nanoparticles exhibited temperature-triggered magnetic separation behaviour: if the temperature switched between below and above 32 °C, could be dispersed into reversibly separated by a field 1.1 T.
A centralized method for studying natural product chemical biology begins by designating a single fluorescent dye as core reporter and develops through the facile conversion to diverse panel of fluorescently labeled products. Comparative analyses are developed using LED fluorescence microscopy. Application this is established profiling cellular uptake localization selected members anthracycline, acetogenin, depsipeptide, nonribosomal peptide, polyether, polyketide families
Abstract Summary: Due to a large difference in storage modulus below and above the glass transition temperature, novel shape‐memory poly[(methyl methacrylate)‐ co ‐( N ‐vinyl‐2‐pyrrolidone)]/poly(ethylene glycol) semi‐interpenetrating polymer networks structure was synthesized, which is stabilized by hydrogen‐bonding interactions. The recovery ratio of these polymers could reach 99%. In such system maximum molecular weight PEG required for semi‐IPNs formation reaches 1 000. Transition from...
Abstract Summary: Magnetic nanoparticles have been prepared by a co‐precipitation method and modified with methacryloxypropyltrimethoxysilane. molecularly imprinted polymer particles suspension polymerization in silicone oil. The possess high affinity to the template molecules are rapidly separated under magnetic field. SEM photograph of MIP particles. magnified image
Thermosensitive cross-linked polymer vesicles were formed by self-assembly of block copolymer poly(2-cinnamoylethyl methacrylate)-block-poly(N-isopropylacrylamide) (PCEMA61-b-PNIPAM22) and subsequent photo-cross-linking PCEMA shells. The ability these to load release 4-aminopyridine (Apy), a model compound, is discussed. It found that the can large amount Apy compound at tunable rate depending on temperature. also show satisfactory reversible reproducible thermosensitive characteristics.
Abstract A simple efficient post‐modification route to the fabrication of hybrid gold nanoparticles with poly( N ‐isopropylacrylamide) (PNIPAm) based on click chemistry is described. The PNIPAm was prepared by reversible addition fragmentation chain transfer radical polymerization (RAFT). immobilized onto grafting densities 5.8 chains · nm −2 a reaction. showed temperature responsive phenomenon as changed between 20 and 45 °C. magnified image
Abstract Photoresponsive polymer with azobenzene pendant group (PDMAA‐ co ‐PAPA) was synthesized by radical polymerization of N , ‐dimethylacrylamide (DMAA) and ‐4‐phenylazophenyl acrylamide (PAPA), the characterization inclusion complexes PDMAA‐ ‐PAPA α‐cyclodextrin (α‐CD) were performed FTIR, GPC, 1 H NMR, 2D NOESY, UV–vis spectroscopy. It found that solubility α‐CD in aqueous solution showed tunable property, which could be triggered alternating light irradiation at a certain temperature...
Development of artificial soft materials that have good mechanical performances and autonomous healing ability is a longstanding pursuit but remains challenging. This work reports kind highly flexible, tough, self-healable poly(acrylic acid)/Fe(III) (PAA/Fe(III)) hydrogels. The hydrogels are dually cross-linked by triblock copolymer micelles ionic interaction between Fe(III) carboxyl groups. Due to the coexistence these two cross-linking points, resulting PAA/Fe(III) tough can be flexibly...
A well-dispersed gold nanoparticle–poly-N-isopropylacrylamide (PNIPAm) hydrogel composite with thermo-switchable electrical properties was prepared by the co-polymerization of Au nanoparticles attached vinyl groups NIPAm. The and are characterized TEM, UV-Vis, FTIR, NMR. At same time, conductivity, cyclic voltammetry constant-pontential technique were used to demonstrate composite. It found that show a tunable property changing temperature conductivity changes two orders magnitude at...
A novel route has been developed to prepared beta-cyclodextrin (beta-CD) functionalized magnetic nanoparticles (MNPs). The MNPs were first modified with monotosyl-poly(ethylene glycol) (PEG) silane and then tosyl units displaced by amino-beta-CD through the nucleophilic substitution reaction. monotosyl-PEG was synthesized modifying a PEG diol form corresponding monotosyl-PEG, followed reaction 3-isocyanatopropyltriethoxysilane (IPTS). success of synthesis confirmed (1)H NMR Fourier transform...
In a world where adaptive entities meet chemical oscillators, materials are in autonomic motion and assembly systems completely self-regulated! We review herein the key challenges new trends at interface of fields exhibit autonomous, reversible periodical variation without any external stimuli. Particular attention is paid to design philosophy recently reported actuators self-regulated systems.