JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Chunli Liu,Hongchao Mao,Jifu Zheng,Suobo Zhang
Cardo poly (arylene ether ketone)s bearing hydrophilic carboxylic acid groups (PAEK-COOH) was successfully synthesized by condensation polymerization of 2-[bis(4-hydroxyphenyl)methyl] benzoic acid and 4,4′-bisfluorodiphenylketone. TGA and DSC analyses demonstrated that the material has an initial decomposition temperature and glass transition temperature of 360 °C and 220 °C respectively, which revealed the excellent thermal stability of PAEK-COOH. Then PAEK-COOH was employed to fabricate tight ultrafiltration membrane by the nonsolvent induced phase inversion process (NIPS). The water contact angle of the prepared membrane is 61.5°, indicating its good hydrophilicity. The PAEK-COOH tight ultrafiltration membrane possesses a pure water flux of 119.6±2.6 L m −2 h −1 , dye permeation flux of 100.9±4.3 L m −2 h −1 and rejection of 99.8±0.33% for Congo red at dye concentration of 100 ppm and operation pressure of 0.4 MPa. Membrane has a molecular weight cut off of 9260 Da and gives complete penetration of monovalent inorganic salt NaCl but a slight rejection of divalent inorganic salt Na 2 SO 4 (less than 10%). Thus, the membrane could be used in the decolorization of wastewater or fractionation of dye and salt mixture for dye purification. The membrane also exhibits excellent antifouling performance and anti-dye adsorption properties with a flux recovery ratio of 91.5% for BSA and dye adsorption rate below 5.0% for four kinds of studied dyes, respectively.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2017
·Vol. 9
·期 11
·596
·
IF 3.364
Zejun Pu,Xiaoyi Zheng,Yuhan Tian,Linqing Hu,Jiachun Zhong
In this report, flexible cross-linked polyarylene ether nitrile/functionalized barium titanate(CPEN/F-BaTiO3) dielectrics films with high permittivitywere prepared and characterized. The effects of both the F-BaTiO3and matrix curing on the mechanical, thermal and dielectric properties of the CPEN/F-BaTiO3dielectric films were investigated in detail. Compared to pristine BaTiO3, the surface modified BaTiO3particles effectively improved their dispersibility and interfacial adhesion in the polymer matrix. Moreover, the introduction of F-BaTiO3particles enhanced dielectric properties of the composites, with a relatively high permittivity of 15.2 and a quite low loss tangent of 0.022 (1 kHz) when particle contents of 40 wt % were utilized. In addition, the cyano (–CN) groups of functional layer also can serve as potential sites for cross-linking with polyarylene ether nitrile terminated phthalonitrile (PEN-Ph) matrix and make it transform from thermoplastic to thermosetting. Comparing with the pure PEN-ph film, the latter results indicated that the formation of cross-linked network in the polymer-based system resulted in increased tensile strength by ~67%, improved glass transition temperature (Tg) by ~190 °C. More importantly, the CPEN/F-BaTiO3composite films filled with 30 wt % F-BaTiO3particles showed greater energy density by nearly 190% when compared to pure CPEN film. These findings enable broader applications of PEN-based composites in high-performance electronics and energy storage devices materials used at high temperature.Keywords:polyarylene ether nitrile;surface functionalization;cross-linking;dielectric properties;energy storage capacity
研究领域:
材料科学
·
电气工程
·
高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 36
·e54220
·
IF 3
Lishi Jiang,Xiaoyu Li,Junyu Dai,Niu Zefeng,Sha Gou,Ling Gu,Shajie Luo
“One-step polymerization method” was used to improve the thermal property of semi-aromatic poly(ether ether amide) (PEEA). Firstly, a series of difluorobenzamide monomers containing different numbers of methylene were synthesized by the reaction of diamine and 4-fluorobenzoic chloride using a facile interfacial reaction method. Then, these syntheses were conducted to react with bisphenol AP and 4,4′-difluorobenzophenon to synthesize the novel poly(aryl ether ketone)/semi-aromatic poly(ether ether amide) copolymers (PAEK/PEEA) with different chain lengths in the chain through nucleophilic substitution by a one-step method. The obtained copolymers were amorphous with inherent viscosities of 0.373–0.433 dLg −1 . They were found to have high glass transition temperatures (T g ) of 160–191°C, good thermal stability with 5% weight-loss temperature (T 5% ) of 409–437°C. The tensile strengths of the copolymers were 65.0–75.8 MPa. The storage modulus were over 0.9 GPa at 120°C. At room temperature, the copolymers were soluble in NMP, slightly soluble in DMF, CH 2 Cl 2 , CH 3 Cl, indicating that the synthesized copolymers could be processed by solution method. The results of optical performance showed that the copolymers had good optical transmittance with the optical transmittance of 75.7%–86.1% at 450 nm. They have the potential to be applied as the novel heat-resistance optical films as the novel copolymers.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 2
·e54774
·
IF 3
Wenyu Zhang,Yu Zhang,Weijie Cai,Dazhi Wang,Shaoyin Zhang
2,2,6,6-Tetramethylpiperidinium-nitroxide (TEMPO) is a mild and efficient catalyst, which is important in the industrial production of selective oxidation of alcohols to the corresponding aldehyde or ketone compounds. However, it is a challenge to recover the expensive TEMPO catalyst in homogeneous catalytic systems. In this study, a novel polymer-supported catalyst was prepared using 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxy (4-OH-TEMPO) and polyaromatic ether sulfone (PAES). The successful grafting of 4-OH-TEMPO in PAES-C was demonstrated by 1 H nuclear magnetic resonance ( 1 H NMR) and Fourier transform infrared (FT-IR), load capacity can be calculated by elemental analysis (EA). BET and scanning electron microscopy (SEM) to depict the structure-performance relationship. Herein, SEM images revealed the existence of porous structure. This structure can effectively adsorb NO molecules to form a PAES-TEMPO/NO x catalytic system to selectively oxidize benzyl alcohol. The experimental results indicated the high activity, the subsequent benzyl alcohol oxidation cycle can reach more than 93% conversion without showing a large loss of selectivity. More importantly, the as-prepared catalyst exhibited the attractive recyclability (recovery rate is 98%). After 10 consecutive runs, no significant loss of conversion and selectivity was observed (the conversion rate of benzyl alcohol was more than 93% and the selectivity was more than 95%). This study might provide some recommendation on the development of highly efficient catalysts for alcohol oxidation.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2021
·Vol. 28
·期 1
·140-152
·
IF 1.993
Zhengpeng Yu,Jingjing Zeng,Jingyuan Tang,Yu Li,Tingting Jin,Benlan Zeng,Xianhua Wei,Jingsong Liu,Linyu Pu,Xu Huang
Owing to their excellent dielectric properties and energy storage performance, polymer-based composites have shown great potential in the application of pulse energy storage capacitors and electrostatic capacitors. In this study, BaTiO 3 (BT) particles with different sizes were modified with dopamine to prepare core–shell structured BT particles (PDA@BT), and then the poly(arylene ether nitrile) (PEN)-based PDA@BT/PEN composites were prepared. As a common biological material, dopamine has a variety of functional groups which can be used to improve the compatibility between the fillers and the matrix. Moreover, the movement of the carriers at the interface of the composites is limited and the loss is reduced. The composites with an optimized filler size illustrate a high energy density of 1.37 J/cm 3 at 160 kV/mm, which nearly reaches up to the energy density of biaxially oriented polypropylene (BOPP) at low electric field. In addition, the composites have the superior power density of 1.88 MW/cm 3 with a fast discharge time of 0.138 μs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2019
·Vol. 26
·期 3
·1-11
·
IF 1.53
Zhan Yingqing,Zhang Jieming,He Shuangjiang,Zhao Shumei,Bai Yulong,Liu Xiaobo
Easy and efficient surface functionalization is critical for obtaining high-performance barium titanate (BaTiO 3 ) based dielectric polymer composites. We here demonstrated the easy surface functionalization of barium titanate via modified mussel-inspired method, using dopamine and silane coupling agent KH550 as reactive precursors. As-modified BaTiO 3 hybrid presented core-shell structure, which was further compounded with thermally stable poly(arylene ether nitrile)(PEN) via simple solution casting method, thus obtaining dielectric nanocomposite films. As a result, the dielectric constant of PEN was enhanced from 3.5 to 10.7 at 1 KHz by addition of 40 wt% BaTiO 3 hybrid, due to good dispersion of BaTiO 3 nanoparticles and its interfacial interaction with PEN matrix. Furthermore, as-prepared PEN composites exhibited low dielectric loss, which fluctuated in the range of 0.03 to 0.11 at 1 KHz. Besides, the thermal stability of PEN was significantly improved, and the tensile strength was well maintained even the weight ratio of BaTiO 3 hybrid reached 40 wt%. Therefore, thermally stable and dielectric PEN composite films show promising application in special area where high thermal stability, high strength, and high dielectric constant are needed.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2020
·Vol. 39
·期 2
·211-218
·
IF 3.154
Wei Ren-Bo,Zhan Chen-Hao,Yang Yang,He Peng-Lin,Liu Xiao-Bo
With the expanding application of capacitors, thermal resistant dielectric materials are in high demand due to the increasing harsh environments where the capacitors are needed and the heat generated by the capacitors. Herein, we present polyarylene ether nitrile and titanium dioxide hybrids which can be used as thermal resistant dielectrics for these capacitors. Phthalonitrile modified titanium dioxide (TiO 2 -CN) and phthalonitrile end-capped polyarylene ether nitrile (PEN-Ph) are firstly prepared. After being cast into TiO 2 -CN/PEN nanocomposite films, these composites self-crosslink upon heating at 320 °C for 4 h, forming the polyarylene ether nitrile and titanium dioxide hybrids (TiO 2 -PEN). Improved dielectric constants which are stable from room temperature to 200 °C of these hybrids are observed, indicating the potential application of the hybrids as thermal resistant dielectrics.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2016
·
IF 5.557
Pengfei Huo,Yang Liu,Ruiqi Na,Xingrui Zhang,Shuling Zhang,Guibin Wang
A series of quaternary ammonium functionalized poly(arylene ether sulfone)/poly(vinylpyrrolidone) (PAES-Q/PVP) composite membranes for separators and composite polymer electrolytes (CPEs) of electrical double-layer capacitors (EDLCs) were prepared by solution blending. EDLCs were then fabricated with the composite membranes and activated carbon electrodes. The optimized solid-state EDLC with PAES-Q/PVP composite membrane containing 40 wt% PVP entrapping 6 M KOH served as CPE exhibited a specific capacitance of 140.85 F g −1 and an energy density of 4.81 W h kg −1 at a current density of 0.1 A g −1 . Electrochemical cycle performance of the solid-state EDLC indicated almost 100% cycling retention and near 97% coulombic efficiency over 5000 charge-discharge cycles at 0.5 A g −1 . Additionally, the mechanical properties, thermal stability and electrochemical performance of the composite membranes with various contents of PVP were investigated as well.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Zhixuan Zhang,Tong Cao,Hanrong Wu,Ailin Peng,Lifen Tong,Xiaobo Liu,Yumin Huang
The continuous progress of microelectronic technology requires polymer materials with low dielectric constant, low dielectric loss, excellent mechanical properties and heat stability. As an emerging advanced polymer, poly(arylene ether nitrile) has shown great potential in the field of microelectronics. However, there is still a need to decrease its inherent dielectric constant and dielectric loss. In this work, the cross-linked poly(arylene ether nitrile) containing propenyl and trifluoromethyl groups (PEN) was designed and synthesized. Then the cage-like structure of octaphenyl polyhedral oligomeric silsesquioxane (OPOSS) was introduced to prepare the composite membranes by solution-casting method. After undergoing thermal treatment, dual cross-linked networks were formed, with OPOSS securely embedded within them. The results show that the composite films exhibit significantly enhanced heat stability (T 5% ≥ 491 °C), tensile strength (≥72 MPa) and remain great hydrophobicity (106.6–114.2°). More importantly, among all the composite films, the dielectric constant and dielectric loss of the CPEN/OPOSS-8 composite film are as low as 2.19 and 0.0025 at 1 MHz, respectively. Such excellent comprehensive performance, especially in low dielectric constant while obtaining ultra-low dielectric loss, will make it possible to be used as a low dielectric material. This strategy will open up a new way of thinking for the development of low dielectric materials.
研究领域:
材料科学
·
高分子化学
·
微电子技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2012
·
IF 3.85
Qiang Zhang,Baijun Liu,Wei Hu,Wan Xu,Zhenhua Jiang,Wei Xing,Michael D. Guiver
Two series of novel side-chain-acid poly(arylene ether)s bearing aliphatic-chain-linked sulfophenyl pendants are synthesized by direct polycondensation reactions derived from a new sulfonated difluoro-monomer, sodium 4-(3-(4-(2,6-difluorobenzoyl)phenoxy)propoxy)benzenesulfonate. The sulfonation content is readily controlled by adjusting the feed ratios of sulfonated and unsulfonated monomers. The obtained polymers exhibit considerably reduced dimensional swelling and good proton conductivities. It is found that the cyano-functionalized poly(arylene ether)s exhibit lower water uptake and dimensional swelling in comparison with the corresponding SPAE series. SPAEK-3 with an ion exchange capacity of 1.5 mequiv g −1 has proton conductivity of 0.12 S cm −1 and water swelling ratio of only 26% at 100 °C. Importantly, obvious hydrophobic/hydrophilic phase separation morphology is observed, which may be highly related with their good proton transport ability.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Mengna Feng,Deyu Ma,Xuanrong Chen,Pan Wang,Jing Lin
Polymer-based dielectric composites are potential substitute dielectrics for organic thin film capacitors. In this work, the exfoliated molybdenum disulfide (MoS 2 ) was functionalized by mussel-inspired poly(dopamine) (PDA) to form core-shell structured composites (MoS 2 @PDA) under easy-handling and eco-friendly conditions, and then as filler incorporated into poly(arylene ether nitrile) (PEN) matrix. The interfacial interaction and dispersion of MoS 2 @PDA in PEN matrix were improved by the strong adhesion of PDA interlayer to exfoliated MoS 2 , π-π conjugation and hydrogen bond interactions, which formed by the polar nitrile group of PEN and catechol groups of PDA. Therefore, the PEN/MoS 2 @PDA composite films exhibited enhanced dielectric constant, synchronously maintaining better flexibility, thermal stability and the same level of dielectric loss with PEN. Particularly, the addition of 20 wt% MoS 2 @PDA into PEN matrix leaded to substantial growth of dielectric constant up to 12.9 at 1 kHz, while the PEN matrix was just 4.2. Meanwhile, the dielectric composites maintained relatively low dielectric loss of 0.022 at 1 kHz, which was ascribed to the improved compatibility and interfacial interaction between filler and PEN. All in all, a eco-friendly and easy-handling strategy was provided to tune the dielectric constant and dielectric loss of semiconductor/polymer composites, which has great potential to promote the development of dielectric in the fields of organic thin film capacitors.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Jingwei Jiang,Yunlong Sun,Zhipeng Wang
With the rapid growth of 5G communication technology, low-dielectric materials can decrease the loss of the signal during transmission. Hence, there is an urgent need to develop high-performance materials with low dielectric constant (D k ) and dielectric loss (D f ) at high frequency. In this study, we propose a strategy that combines bulk rigid quinoxaline structure and low polarizability trifluoromethyl group to prepare poly (aryl ether)s (PAEs) with low D k and D f at high frequencies. The effect of methyl substituents on the properties of PAEs was focuses on investigated. Accordingly, three difluoro-monomers containing quinoxaline structures were designed and prepared and novel quinoxaline-based PAEs with different numbers of methyl substituents were synthesized by nucleophilic condensation reactions with the bisphenol monomer hexafluorobisphenol A (BP6F). Test results that the resultant PAEs exhibited excellent thermal and solubility properties, with 5 % thermal decomposition temperatures ( T d5% ) in the range of 500−515 °C and glass transition temperatures ( T g ) reaching 225 °C. Furthermore, these PAE films show outstanding optical transparency, with cut-off wavelengths of 398−400 nm and above 87 % transmission at 800 nm. Most importantly, the novel PAE films possess ultra-low D k and D f , with the lowest values reaching 2.45 and 0.0024 at 10 GHz and maintain low water absorption (0.53–0.63 %). The excellent properties of novel quinoxaline-based PAEs provide its application potential in the field of high-frequency communications.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）