A5048209237- Synthesis and properties of polymers
- Tribology and Wear Analysis
- Dielectric materials and actuators
- Polymer Nanocomposites and Properties
- Silicone and Siloxane Chemistry
- Advanced Sensor and Energy Harvesting Materials
- Polymer crystallization and properties
- Lubricants and Their Additives
- Additive Manufacturing and 3D Printing Technologies
- Conducting polymers and applications
- Epoxy Resin Curing Processes
- Thermal properties of materials
- Ferroelectric and Piezoelectric Materials
- Carbon Nanotubes in Composites
- Graphene research and applications
- biodegradable polymer synthesis and properties
- Fiber-reinforced polymer composites
- MXene and MAX Phase Materials
- Organoboron and organosilicon chemistry
- Advanced ceramic materials synthesis
- Injection Molding Process and Properties
- Advanced Thermoelectric Materials and Devices
- Metamaterials and Metasurfaces Applications
- Carbon dioxide utilization in catalysis
- Flame retardant materials and properties
Jilin University
2013-2024
Jilin Medical University
2015-2017
State Council of the People's Republic of China
2017
For RHPC/Fe, RL of −21.8 dB can be achieved with the absorption bandwidth (RL ≤ −10 dB, ABW) 5.6 GHz at a thickness 1.4 mm, while for RHPC/Co, −40.1 ABW 2.7 1.8 mm.
High-temperature dielectric polymers are in high demand for powering applications extreme environments. Here, we have developed high-temperature homopolymer dielectrics with anisotropy by leveraging the hierarchical structure semicrystalline polymers. The lamellae been aligned parallel to surface films. This structural arrangement resembles horizontal alignment of nanosheet fillers polymer nanocomposites and nanosheet-like block copolymers, which has proven provide optimal topological...
Polyetherimide (PEI) is the state-of-the-art commercial high-temperature polymer dielectric with excellent thermal and chemical stability relatively high capacitive energy storage properties. The rotation of dipoles in PEI chains brings β-relaxation which seriously increases leakage current decreases charge-discharge efficiency. In this work, hydrogen bonds have been introduced to limit dipole by blending aramids [1,4-poly(ether fluoromethyl naphthalene amide), PNFA] into matrix. By...
Polymer film capacitors are ubiquitous in modern electronics and electric systems, but the relatively low working temperatures of polymer dielectrics limit their application next-generation capacitors. The currently reported high-temperature rely on construction nanocomposites with wide band gap fillers cross-linked networks to achieve high breakdown strength efficiencies. However, generating optimal chain structure intrinsic great capacitive properties using a one-component is still...
Abstract Fluorinated poly(aryl ether)s (FPAEs) have attracted much attention due to their high thermal stability, excellent mechanical strength, and low dielectric constant. High‐molecular‐weight fluorinated ether) containing phenylethynyl (FPAE‐PE) is successfully synthesized by nucleophilic substitution between 3‐ethynylphenol FPAE. The cross‐linked (C‐FPAE‐PE) prepared treatment of FPAE‐PE at 300 °C. dynamic thermomechanical property, performance C‐FPAE‐PE are systematically studied. has...
Abstract Nanofiller reinforcement is an effective method to prepare high thermally conductive polymer‐matrix composites. However, the poor dispersion of nanofillers and interfacial thermal resistance between filler matrix seriously affect conductivity mechanical properties To solve this problem, a small amount conjugated fluorene group introduced into polymer chain poly (ether ether ketone) (PEEK) afford fluorene‐functionalized copolymer (FD‐PEEK). In in situ polymerization procedure,...
The high strength of multiwalled carbon nanotubes (MWCNTs) indicates promising properties for industry applications to reduce frictional coefficient and improve mechanical properties, yet few researches have referred its structural morphology on the thermal, mechanical, tribological composites. In this work, three different lengths MWCNTs were used prepare polyether ether ketone (PEEK) composites investigate effect Different endowed PEEK with properties. On thermal incorporation 10–30 μm...
The poly (ether ether ketone) (PEEK)/graphite composites with good tribological performance were studied. When compared pure PEEK, the PEEK/graphite exhibited a lower frictional coefficient, which was attributed to layer structure of graphite, can be easily separated or slide past each other. Considerations given both coefficient friction and wear rate, showed optimal behavior when graphite content at 25 wt%. This proportion chosen investigate effect micron-graphite particle size on...
Abstract Fused deposition modeling (FDM) has been successfully applied to the manufacturing of poly(ether ether ketone) (PEEK) special engineering plastics. However, due unavoidable defects caused by FDM technology and high melt viscosity PEEK, 3D printed PEEK parts have poor mechanical properties. In this study, properties microstructure with different nozzle temperatures having various molecular weights were researched in detail. The results showed that PEEK‐033G medium weight had good...
Abstract Covalent modification of multiwalled carbon nanotubes (MWCNTs) is an efficient way to improve the interfacial interaction and compatibility between MWCNTs matrix. In this article, MWNCTs were covalently modified by 4,4′‐difluorobenzophenone (DB) allow temperature‐tolerant functional groups on walls. These surface‐functionalized (MWCNTs‐DB) then attached poly(ether ether ketone) (PEEK) resins in situ grafting polymerization, prepare high‐strength PEEK nanocomposites. The addition 1...
Abstract The production of low dielectric materials that can be used in high temperature environments is the primary aim this work. A cross‐linked structure introduced into fluorinated poly(aryl ether) (named as FPAE) with molecular weight ( M w , 140 000 g mol −1 ) and linear using nucleophilic substitution reaction at ortho‐position decafluorobiphenyl monomer units FPAE chain. curing time are optimized final conditions for cross‐linking study determined to 300 °C 1 h. Moreover, constant...
Abstract Two novel poly(arylene ether sulfone)s with high biphenylene content (BDS‐PES and BDS‐PDBES) are prepared by nucleophilic substitution polymerization of synthesized 4,4′‐bis(4‐hydroxyphenyl)diphenyl sulfone (BDS) 4,4′‐sulfonylbis(fluorobenzene) 4,4‐bis[(4‐chlorophenyl)sulfonyl], respectively. The polymers show glass transition temperature excellent high‐temperature mechanical properties. BDS‐PDBES higher is as 300 °C, can still maintain its 30% storage modulus at 295 °C. In...
A new soluble boron-containing poly(ether ether ketone) (B-PEEK) was synthesized through iridium-catalyzed C–H borylation and grafted on the surface of aluminum borate whiskers as coupling agent between PEEK matrix.
Poly(arylene ether sulfone) resins are usually a class of amorphous polymers, which makes them inferior to other semicrystalline aromatic polymers in solvent resistance, chemical stability, and mechanical strength. Herein, crystallizable poly(arylene sulfone ketone) with high biphenylene content (BD-PESK) was designed synthesized. BD-PESK showed excellent thermal stability Tg 241 °C 5% weight loss temperature 548 °C. Meanwhile, exhibited an obvious melt memory effect at 350–370 °C, but weak...