JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Chunli Liu,Hongchao Mao,Jifu Zheng,Suobo Zhang
Carboxylated cardo poly(arylene ether ketone)s (PAEK-COOH) is a thermally stable and hydrophilic membrane fabrication material. Herein, PAEK-COOH was employed as membrane material, being dissolved in N-methyl-2-pyrrolidone (NMP) and 1,4-dioxane (DO) mixed solvent and activated by adding 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) to prepare polymer casting solution . Then the activated polymer film was immersed into polyethylenimine (PEI) aqueous solution that served as coagulation bath for taking the one-step chemical reaction-involved phase inversion process. As illustrated by the SEM images, the fabricated crosslinked tight ultrafiltration membrane had a dense and integrally skinned separation skin layer. Chemical composition and hydrophilicity of membrane surface were studied by ATR-FTIR and water contact angle , respectively. Those results revealed that, via the in situ crosslinking of activated carboxylic acid group and PEI along with the phase inversion process, the PEI molecules had been covalently bonded onto membrane surface and resulted in the increase of membrane hydrophilicity. The optimized membrane had a molecular weight cut off (MWCO) of 12.7 kDa and an isoelectric point of 7.4, indicating which is slightly positively charged. The one-step chemical reaction involved phase inversion between reactive macromolecules, i.e., activated PAEK-COOH original polymer film and PEI crosslinker in coagulant, was an efficient and convenient approach for fabrication of highly permeable and selective tight ultrafiltration membranes. Membrane had a dye solution permeability of 80–84 L m −2 h −1 bar −1 and Congo red (CR) rejection of 99.9% in 100 h long-term filtration testing, being capable for dye removal from textile wastewater .
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2021
·
IF 2.161
Huifa Meng,Qian Zhang,Maoping Lu,Zhencai Qu,Bing Chen,Chang-an Xu,Mangeng Lu
Benzene-1,3,5-triyl tribenzoate (TBB), both 3,5-bis(benzoyloxy)benzoate-terminated poly (aryl ether ketone) oligomers (BPAPK and TMPK), containing active ester (Ph−O−(C=O)− structure), were prepared and served as curing agents for dicyclopentadiene novoalc epoxy (DCPD). The curing kinetics and properties of three epoxy thermosets were systematically investigated. The model reaction of TBB and glycidyl phenyl ether was designed to understand the curing mechanism of oxirane ring with active ester. TMPK/DCPD displays the lowest reaction activation energy, which is the result of the combined influence of free volume and diffusion. In addition, TMPK/DCPD has the highest Tg value (218°C), which enhances 34.6% and 42.5% compared with BPAPK/DCPD and TBB/DCPD, respectively. Meanwhile, TMPK/DCPD also shows superior dielectric and water resistance properties due to no secondary alcohol generated after curing and hydrophobic tetramethyl-substituted biphenyl structure. Herein, TMPK/DCPD as high-performance epoxy thermosets has potential applications in electronic packaging fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Shu Chun Li,Ao Nan Lai,Qiu Xiang Wang,Peng Cheng Hu,Shu Feng Zhou
To develop anion exchange membranes (AEMs) with high conductivity and mechanical properties, a synergistic design strategy integrating comb-shaped architectures and block copolymer backbones is implemented. In this study, a novel series of block poly(arylene ether sulfone) with built-in alkyl chains is synthesized and piperidinyl modified for comb-shaped block AEMs (QBPSA-m/n). The influence of comb-shaped structure content on the membrane's properties is investigated by varying the ratio of alkyl chain-contained and alkyl chain-free segments. Along these processes, the membranes display obvious phase separation morphologies, as characterized by atomic force microscopy (AFM). QBPSA-m/n with moderate ion-exchange capacity (IEC) of 1.58–1.46 meq g −1 shows low swelling ratio (7.61 %–8.47 % at 80 °C), high conductivity (116.28–135.14 mS cm −1 at 80 °C) and robust mechanical properties (tensile strength of 30.45–44.49 MPa). Furthermore, QBPSA-m/n also exhibits good thermal stability and optimizable alkaline stability.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhuo Zhang,Bitun Wang,Xu Zhang,Zhaofeng Wang,Qun Ding,Xiaowei Liu,Wang Lu,Zhiguo Li,Yang Liu
To develop high-performance antifouling ultrafiltration membrane materials, a novel poly(aryl ether oxadiazole) (PAEO) was designed and prepared. Subsequently, a modified poly(aryl ether oxadiazole) containing phenolic hydroxyl groups (PAEO-OH) was further synthesized by reacting the oxadiazole ring with the amino group at high temperature. The introduction of hydroxyl groups in PAEO-OH enhanced its hydrophilicity and increased the pure water flux compared to the 3-PAEO membrane, while maintaining a rejection ratio exceeding 90%. The antifouling performance of the 3-PAEO-OH membrane was evaluated using a three-cycle ultrafiltration experiment, which showed over 90% reversible fouling and more than 80% flux recovery, highlighting its excellent antifouling characteristics. Additionally, the antifouling and separation performance of the PAEO-OH membrane, prepared with varying PVP content, was analyzed. The results revealed that optimal performance was achieved with a PVP content of 4.5 wt.%. In conclusion, the PAEO-OH membrane demonstrates significant potential for various applications in industrial separation and purification processes.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Xiaohuan Li,Donghan Li,Jiawei Liu,Honghua Wang
Thermoplastic toughening agents represent a prevalent category of epoxy resin modifiers. In practical applications, these agents can significantly enhance the mechanical properties of epoxy resins. However, due to the inherent phase separation characteristic of epoxy resins, the toughening effect is somewhat constrained. Recently, branched polymers have gained recognition for their effectiveness in toughening epoxy resins. Their low viscosity and abundant reactive groups facilitate superior toughening outcomes. This study leverages both the structural attributes of branched polymers and high-performance polyethersulfone ketone (PESK). Through nucleophilic polycondensation reactions involving bisphenol monomers such as dihydroxydiphenylsulfone (BDS), difluorophenyl ketone (DFDBK), and trifunctional monomer 1,1,1-tri(4-hydroxyphenyl)ethane (THPE), we synthesized a series of long-chain polyaryletherketones (LCBPESK) with varying degrees of branching. The fundamental properties of these materials were characterized, and they were employed for toughening modification within the epoxy resin/methyltetrahydrophthalic anhydride (E51/MTHPA) system. Characterization tests revealed that long-chain branched polyethersulfone ketones possessing both branched structures and reactive end groups effectively mitigate phase separation between the toughening agent and the epoxy resin while significantly enhancing its toughness. Notably, when LCBPESK-30 is incorporated at a loading level of 15 phr, there is a remarkable increase in impact strength by 133% in the epoxy system. In addition, we investigated the toughening mechanism of LCBPESK in E51. For polyaryl ether resins, a certain degree of branching and the presence of active end groups significantly influence their toughening effect in epoxy resins, which holds considerable industrial value and promising application prospects.
研究领域:
材料科学
·
高分子化学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 23
·e55480
·
IF 2.7
Chuan Yan,HongHua Wang,LiXin Song,GuangYuan Zhou
Aiming at the problem of phase separation between thermoplastic toughener and epoxy after curing, which leads to the reduction of mechanical properties, in this paper we improve the compatibility of the two phases by introducing reactive groups into the molecular chain of thermoplastic resins, thus improving the impact strength of the epoxy system. Phenolphthalein polyether sulfone (C-PESC) with designable and controllable carboxyl group content was prepared via SN 2 nucleophilic substitution copolymerization. Further C-PESC was evaluated for epoxy toughening, and the effects of carboxyl group content of C-PESC on mechanical properties and thermal stability of the resin system were investigated. The results show that C-PESC resin has good compatibility with E51 epoxy resin. Carboxyl group accelerates the dissolution rate of thermoplastic resins in epoxy and also participates in the curing reaction with epoxy to enhance the interfacial bonding ability between the toughening component and the matrix resin. The reactive toughener C-PESC can not only improve the impact properties of E51 epoxy, but also maintain the high T g and thermal properties of the resin system. Among them, the addition of 5 PHR of C-PESC3 increased the impact strength of the modified resin by 45%, with uniform fracture surface and tough fracture shape.
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
Surfaces and Interfaces
·
2024
·
IF 5.7
Jingyu Lin,Xiaohan Wu,Yifan Xia,Lingzhi Nie,Peiyuan Zuo,Puke Mi,Qixin Zhuang
Polyetherimide (PEI) has great potential as a dielectric because of its high-temperature resistance, but its low energy storage density limits practical applications. Incorporating hafnium dioxide (HfO 2 ) with a moderate dielectric constant ( k ) and wide bandgap can simultaneously enhance the polarization intensity of PEI and potential barriers for charge injection . Nevertheless, the poor compatibility between HfO 2 and PEI inevitably introduces defects, thereby weakening the inhibitory effect on dielectric loss . To tackle this issue, an organic double interface layer is introduced to enhance dielectric performance, where the polar poly(arylene ether urea) (PEEU) containing hydrogen bonds can ensure the layer's compactness. Notably, its non-bonding urea groups serve as deep traps to capture migrating carriers, and the gradient k values of HfO 2 , PEEU, and PEI help mitigate electric field distortions at the interface, therefore enhancing the suppression of conduction loss . The polarity of PEEU and the introduction of multiple interfaces significantly contribute to an increased k (maximum 9.7, at 1 kHz). At 300 kV mm −1 , 5 vol% PEEU@HfO 2 /PEI achieves a discharged energy density of 3.3 J cm −3 and a high charge-discharge efficiency of 83 %, surpassing 5 vol% HfO 2 /PEI by 1.95 and 2.44 times, respectively. The further COMSOL simulation verifies and proves this work as a novel design strategy for nanocomposite dielectrics.
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
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2024
·Vol. 35
·期 11
·e6598
·
IF 3.1
Lingmei Jiang,Chenghao Wang,Changhong Xiao,Guangsheng Zhang,Yibo Wang,Haoran Liu,Kuanyu Yuan,Lishuai Zong,Jinyan Wang,Xigao Jian
For large-area electronic and high shape complexity structure applications, various solution-processable materials are chosen as dielectric layer due to their simple molding process via spin-coating, casting, or 3D printing at room temperature. Herein, the acrylic-ended fluorinated hyperbranched polyaryletherketone ( hb -P6FAEK-Ace) was used as the prepolymer and then, the composition of photosensitive resin formula was regulated by adjusting the addition ratio of hb -P6FAEK-Ace and diluents (acrylimorpholine [ACMO] 1,6-Hexanediol diacrylate [HDDA]). These photosensitive resin solutions showed the relative low viscosities ranged ranging from 18 to 253 mPa S at 100°C which was in favor of the future 3D printing method and printing accuracy. Then, the obtained UV-cured films show the maximum tensile strength up to 71.9 MPa and superior thermal properties with the T g of 157°C–177°C and T 5% of 314°C–351°C. Moreover, they also exhibited the good dielectric performance with dielectric constants of 2.43–2.20 and dielectric loss of 0.013–0.014 at 1 MHz–1 GHz. These abovementioned satisfactory performance could be ascribed to the aromatic skeleton of hb -P6FAEK-Ace, introduced polarizability-CF 3 groups and the inner cavities for the hyperbranched structures, also the precise control of formula composition. Additionally, the curing degree, shrinkage of solid, and moisture properties were also researched thoroughly. This work provides a simple formula design though to construct the high performance and low dielectric photosensitive resin for the requirements of microelectronic applications.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Dengxun Ren,Xiaobo Liu,Mingzhen Xu,Xianzhong Tang
Iron phthalocyanine (FePc) with self-assemble properties was used to construct microstructures on carbon fiber (CF). Morphology, roughness and wettability of modified CF were characterized. Then, poly(arylene ether nitriles) (PEN) was chosen to fabricate CF reinforced composites and the interfacial compatibility of composites was investigated by SEM and their viscoelastic properties. Rheological properties including linear viscoelastic region, storage/loss modulus, and viscosity were investigated. Besides, dynamic mechanical properties of the composites were studied under different frequency and the apparent activation energy of glass transition was calculated. Results showed that using a proper PEN solution concentration to impregnate FePc microstructures modified CF could help to form better mechanical interlocking on interface. Besides, influence of shape, size and density microstructures on forming mechanical interlocking was studied and discussed. Results revealed that granule-like microstructures, reducing the size of microstructure, and decreasing the distance between microstructures were benefit to forming better mechanical interlocking on interface. Based on the researches, mechanism of improved interfacial compatibility through forming mechanical interlocking was proposed and the interlaminar shear strength (ILSS) of the composites were studied.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2021
·Vol. 59
·期 13
·1414-1423
·
IF 0
Aftab Ahmad,Hui Tong,Tao Fan,Ju Xu
The development of high-performance dielectric films with high energy density and temperature stability is extremely desired for modern electronics and power systems. Herein, a simple and low-cost approach is proposed to fabricate all-organic blend films prepared from poly (arylene ether urea) (PEEU) and polyimide (PI) via solution casting and thermal imidization process. The incorporation of PEEU in PI matrix significantly improved dielectric breakdown strength and dielectric constant of PI. More precisely, blend film with 15 wt% PEEU exhibited highest energy density 5.14 J/cm 3 at 495.65 MV/m, with enhanced dielectric constant of 4.73 and very low dissipation factor of 0.299%. Furthermore, the dielectric properties of the PEEU/PI blend displayed wonderful temperature stability in the range of − 50–+ 250°C, and great frequency stability between 10 and 10 6 Hz. The blend film also exhibited excellent heat resistance and presented valuable potential in thin film capacitors for high voltage direct current system. Graphical
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
ACS Applied Bio Materials
·
2020
·
IF 0
Xunyuan Jiang,Yitong Yao,Weiming Tang,Dongmei Han,Li Zhang,Ke Zhao,Shuanjin Wang,Yuezhong Meng
Metal-based implants possess excellent mechanical strength, corrosion resistance, and biocompatibility and can deliver favorable performances in clinic treatments. However, modulus mismatching is considered a common defect for metal-based materials, while polymer-based materials with a bonelike elastic modulus have been regarded as one of the most promising candidates for bone replacement implants. In this work, a phosphonic acid- and fluorine-containing poly(aryl ether) (PAE) resin is designed and synthesized, which is determined to be an amorphous polymer with excellent thermostability. The elastic modulus of composites is improved to 15.7 GPa by reinforcing with 60 wt % hydroxyapatite (HA), which demonstrates admirable protein adsorption and hydrophilicity. After 14 days of immersion in simulated body fluid, a layer of HA deposition can be observed, indicating favorable bioactivity in advance, and the preliminary in vitro cell experiments also suggest that PAE-HA composites possess favorable cell responses on adhesion, proliferation, and differentiation, which reveal the feasibility of synthesized polymers to be employed as bone replacement materials, while the adjustability in molecular chains also leaves room for further investigations.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
MACROMOLECULAR RESEARCH
·
2019
·Vol. 28
·期 5
·450-454
·
IF 1.758
Gu Yiyang,Zhao Zhen,Chao Danming,Liu Xincai
Stimuli-response materials have attracted considerable attention due to their potential applications in sensoring, smart coatings, and intelligent devices. Herein a novel thermo-photo staged response shape memory poly(aryl ether ketone) bearing flexible alkyl segments and azobenzene groups was successfully designed and synthesized. Its chemical structure, thermostability and mechanical properties were characterized through Fourier Transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, thermal gravimetric analysis and dynamic mechanical analysis. The resultant polymer disclosed thermo-/photo-dual stimuli-response behaviors, ascribed to its unique chemical structure. Firstly, the polymer film exhibited good thermal response shape memory effect with satisfied shape fixity ratio ( R f ) and shape recovery ratio ( R r ) (>99%). Moreover, an interesting photo-thermo two-staged responsive shape memory behavior with bending deformation over 100° upon the exposure of ultraviolet light and recovering to its original state through thermal treatment was revealed, attributed to the transcis isomerization of azobenzene groups.
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）