SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Zhuang Zhuang,Duo Qi,Chunyu Ru,Jing Pan,Chengji Zhao,Hui Na
This study presented a novel polymeric humidity sensor based on CaCl 2 -doped sulfonated poly (ether ether ketone) (SPEEK). For the first time, we developed a crosslinking procedure to modify SPEEK for humidity sensors application. SPEEKs with fixed value of sulfonation degree were synthesized by a direct aromatic nucleophilic substitution polymerization of sulfonated monomers. The obtained polymer was used to prepare humidity sensitive composites by doping CaCl 2 , and then they were fabricated by spin coating on a ceramic substrate to use as a novel polymeric humidity sensor. Humidity-sensing performances were investigated by varying both CaCl 2 concentration and relative humidity. Comparing with the pristine polymer, CaCl 2 -doped SPEEK showed improved humidity sensing properties and the 10 wt%- CaCl 2 /SPEEK sensor showed the best sensing properties for high sensitivity, little hysteresis (1.14%), fast response (2 s)/recovery time (65 s) and outstanding stability. Additionally, the morphology and thermal properties of composites and the humidity sensing mechanism of the sensors were discussed in detail. Most importantly, CaCl 2 was employed not only as dopant to significantly improve the sensitivity, but also as cross-linker to reduce the sorption hysteresis. This study demonstrated that these humidity sensors could offer a great potential for applications.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 9
·
IF 1.768
Fang Qiu,Minle Peng,Zhimei Wei,Xiaojun Wang,Jie Yang
A novel kind of sulfonated polyethersulfonephenylethane (SPESPE) was successfully synthesized firstly in this work. Then the SPESPE was introduced in polyethersulfone (PES) microspheres prepared by the electrospraying technique. The microspheres were applied to adsorbing bisphenol A (BPA) from its aqueous solution. Compared with the PES microspheres, the adsorption capacity of PES/SPESPE microspheres for BPA was increased significantly. Furthermore, the adsorption capacity of PES/SPESPE microspheres was enhanced by increasing the amounts of SPESPE in the microspheres. The pH of solution had influence on the adsorption capacity of PES/SPESPE microspheres. The kinetic data of adsorption were found to follow pseudo-second-order model. The Freundlich isotherm model was suitable to describe the equilibrium adsorption data. The microspheres also showed excellent regeneration and reuse ability. These results indicated that the PES/SPESPE microspheres have the potential to be used in environmental application. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43066.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
E-POLYMERS
·
2022
·Vol. 22
·期 1
·763-774
·
IF 3.074
Huizhi Liu,Qilin Mei,Guomin Ding,Han Xiao,Shuhui Chen,Zhixiong Huang
The percolation thresholds of poly ether ether ketone/graphene (PEEK/Gr) composites in most studies are high due to the random distribution of Gr in the matrix. Here, aminated poly-ether-ether-ketone/graphene network (PEEK-NH 2 /GN) nanocomposites were prepared by electrostatic adsorption of PEEK-NH 2 with positive charges and graphene oxide with negative charges, followed by in -situ reduction and hot-pressing. The GN structure of composites was well presented in the images of scanning electron microscope. The PEEK-NH 2 /GN nanocomposites exhibited excellent electrical conductivity with a maximum conductivity of 0.0634 S·cm −1 and a percolation threshold as low as 0.25 vol%. In addition, the maximum tensile strength of nanocomposites was reached at 93 MPa when the Gr content was 0.5 wt%. We believe that this approach is a new avenue for the production of low filler high conductive polymer composites with potential commercial prospects in various fields.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 5
·e70213
·
IF 3.4
Yonglin Wang,Wenzhen Qin,Jianping Zhou,Kaixuan Lei,Shulin Bai,Jianfang Cao,Xiu Wang,Hongbo Liang
The effect of sodium dodecylbenzenesulfonate (SDBS) surfactant on dispersion performance of sodium styrene sulfonate hydrate modified polyethersulfone (sPES) sizing and the interface of carbon fiber reinforced polyether ether ketone (CF/PEEK) composites was studied. The addition of SDBS reduced the particle size of the sPES dispersed in water, improving the film-forming and stabilization of the sizing agent. It was found that the SDBS would not affect the interfacial adhesion of CF/PEEK composites when the weight of SDBS was below 0.6 wt%, but the excessive amount of SDBS seriously reduced the interface strength in composites. Finally, the enhancement mechanism of the sPES/SDBS sizing agent for CF/PEEK composites interface was elaborated.
研究领域:
材料科学
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复合材料
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产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Siyu Zhong,Zhongxin Dong,Yanwei Xiao,Yuan Li,LiangLiang Pei,Shengdao Wang,Guibin Wang
In recent years, numerous studies have reported the application of crystalline sizing agents for the interfacial modification of carbon fiber reinforced polyether ether ketone (PEEK/CF) composites. However, the underlying mechanism by which these agents improve the interfacial properties remains unclear. Therefore, the interfacial enhancement mechanism of PEEK/CF composites using crystalline PEEK sizing agents was explored from a microscopic perspective, specifically focusing on interfacial crystallization in this study. Firstly, the crystallization behavior of PEEK on the CF surfaces modified with varying concentrations of crystalline PEEK sizing agents was investigated using polarized optical microscope (POM). It was observed that the sizing agent could induce the formation of PEEK transcrystallinity (TC) on the CF surface, with the 1 wt% concentration of sizing agent resulting in the densest crystal nuclei. The lamellar morphology and molecular orientation of the TC layers were further analyzed. Correspondingly, higher interfacial shear strength (IFSS) was observed in PEEK/CF composites with denser TC structures. Furthermore, the film tensile tests and chemical solvent erosion experiments were conducted to investigate the distribution of weak interfacial phases. It was found that the TC layer did not introduce new “weak interfacial phases” into the composites and exhibited superior resistance to solvent erosion. Finally, the mechanism of action of crystalline PEEK sizing agents was discussed. It was proposed that PEEK molecules from the sizing agent could effectively fill the voids at the interface of the composites which were caused by the low mobility of high-viscosity PEEK resin matrix. This led to an increase in nucleation sites on the CF surface and the formation of a denser TC layer.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Nan Zhou,Yingze Li,Long Xia,Naiyu Jiang,Hongyan Zhang,Hua Yao,Xiaohu Zou,Wenbo Liu,Dongxing Zhang
The weak interfacial bonding between carbon fiber (CF) and polyetheretherketone (PEEK) has constrained the mechanical performance and multifunctional potential of the CF reinforced PEEK composites. To overcome this challenge, an environmentally sustainable surface modification strategy for CF was developed, leveraging the synergy of cross-dimensional nanomaterials. Unlike conventional approaches where conductive carbon black (CB) is dispersed in resin matrices, this work pioneers the use of surface-charge-modified CB for direct fiber interfacial enhancement. Using the electrostatic self-assembly method, two-dimensional negatively charged MXene nanosheets and zero-dimensional positively charged conductive CB particles were precisely anchored onto the CF surface through electrostatic interactions. The innovative synergy of the cross-dimensional dual nanomaterials simultaneously enhanced the mechanical and electromagnetic shielding properties of the CF/PEEK composites. Compared with the unmodified CF/PEEK composite, the maximum improvements in flexural strength, flexural modulus, and interlaminar shear strength (ILSS) of the composite after modification were 73.4 %, 47.72 %, and 60.27 %, respectively. This is achieved through the synergistic effects of mechanical interlocking, electrostatic interactions, van der Waals forces, along with hydrogen bonds. Meanwhile, the optimal electromagnetic shielding performance of the modified composite reached 31.04 dB at the X-band, representing an increase of 33.56 %, which can mainly be ascribed to the uniform distribution of nanomaterials that enhance the conduction loss and multiple reflections. This scalable and eco-friendly pathway holds considerable application potential for constructing integrated structural-functional CF/PEEK composites.
研究领域:
材料科学
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复合材料工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF THERMOPHYSICS
·
2025
·Vol. 46
·期 3
·1-20
·
IF 2.9
Jin Guofan,Shi Jianrong,Wang Xiaopo
Both polyoxymethylene dimethyl ethers (OME n ) and biodiesel are considered as promising alternatives or additives to traditional fuels. The addition of OMEs to biodiesel can realize complementary advantages. The physical properties of OME n , biodiesel, or OME n /biodiesel blends are decisive for the performance of internal combustion engines. In this work, density and viscosity of mixtures of OME n with three typical components of biodiesel (methyl decanoate, methyl dodecanoate, and methyl tetradecanoate) were measured from 303.15 K to 333.15 K at atmospheric pressure. The vibrating-tube method and capillary-tube method were used for the present density and viscosity measurement, respectively. The combined relative uncertainty is 0.1% for density and 1.5% for viscosity ( k = 2). The experimental results were fitted by Jouyban-Acree model and McAllister model. Moreover, the excess properties of each mixture including excess molar volume and viscosity deviations were discussed.
研究领域:
能源科学
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物理化学
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产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 16
·3367
·
IF 4.967
Junqi Wang,Ruiqing Liu,Yiwen Tang,Junfeng Zhu,Yonghui Sun,Guanghua Zhang
Since there are not many studies on the application of polymeric surfactants in viscosity reduction emulsification of heavy oil, a series of polyether carboxylic acid–sulfonate polymeric surfactants were synthesized. The viscosity reduction performance and the effect of different chain lengths on the viscosity reduction effect were also investigated. The viscosity reduction, emulsification, wetting, and foaming performance tests showed that the viscosity reduction performance of this series of polymeric surfactants was excellent, with the viscosity reduction rate exceeding 95%, and the viscosity was reduced to 97 mPa·s by the polymeric surfactant with a molecular weight of 600 polyethers. It was also concluded that among the three surfactants with different side chains, the polymeric surfactant with a polyether molecular weight of 600, which is the medium side-chain length, had the best viscosity reduction performance. The study showed that the polyether carboxylic acid–sulfonate polymer surfactant had a promising application in the viscosity reduction of heavy oil.Keywords:polyether-type polycarboxylic acid;viscosity reduction;viscosity reducer;heavy oil
研究领域:
石油工程
·
化学工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Meng Shi,Ge Zhu,Ning Lin,Jingzhi Ma
Polylactic acid (PLA) plays a crucial role in addressing global environmental concerns, particularly the challenges of achieving carbon peak and neutrality goals. Polyetheretherketone (PEEK) has emerged as a potential orthopedic implant material due to its excellent mechanical properties, elastic modulus similar to human bone, wear resistance, and good biocompatibility. In this study, PEEK/PLA (PEEK/PLA) composites were prepared using a film-casting method. PEEK exhibits a spherical structure and can be dispersed in the PLA matrix, demonstrating good compatibility with PLA. Additionally, PEEK acts as a heterogeneous nucleating agent, reducing the surface free energy barrier for the crystallization nucleation of PLA molecules and promoting PLA crystallization. When the PEEK content is 8%, the tensile strength and Young's modulus of the composite material increase by 15.45% and 91.23%, respectively, compared to pure PLA. Furthermore, the introduction of the copolymer (PC x L y A) not only improves the compatibility between PLA and the blend but also successfully regulates the mechanical properties and in vitro degradation of the composite by adjusting the ratio of ε-caprolactone and L-lactide in the copolymer. This study not only delves into the modification strategies and methods for PLA composites but also provides new insights for developing biomedical materials with excellent properties.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Peng Liu,Yanrui Liu,Hui Ruan,Yujue Wang,Fuqiu Ma,Mingbo Ji
Adsorption materials for treating radioactive wastewater must exhibit outstanding adsorption capabilities and robust mechanical, chemical, and radiation stability. In this study, amine-functionalized polyether ether ketone (NPEEK) was synthesized via a Schiff base reaction using a solvothermal method, demonstrating high uranium (U(VI)) adsorption performance. Specifically, NPEEK prepared at 125 °C for 12 h achieved a peak U(VI) adsorption capacity of 220.28 mg/g within 90 min at pH 5, maintaining good adsorption performance after five cycles of experiments. The successful modification of PEEK through ethylenediamine grafting was confirmed by various analyses including Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). The adsorption process aligns well with pseudo-second-order kinetics, Langmuir, intra-particle diffusion, and liquid film diffusion models. It is predominantly governed by chemisorption and monolayer sorption, characterized as a spontaneous endothermic process. Density functional theory (DFT) calculations and molecular dynamics (MD) simulations were employed to elucidate the unique structure and adsorption mechanism from a structural viewpoint. Uranium adsorption occurs via coordination, electrostatic interactions, and intra-particle diffusion. In conclusion, this innovative PEEK-based composite has the potential to address the limitations of existing PEEK-based adsorption materials and emerge as a promising adsorbent for treating uranium(VI)-contaminated wastewater.
研究领域:
材料科学
·
环境科学
·
核化学
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产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Kaixuan Lei,Wenzhen Qin,Shulin Bai,Jianfan Cao,Liang Chen
Improving the weak interfacial bonding of carbon fiber (CF)/polyetheretherketone (PEEK) composites is an extremely urgent need. Addressing this issue, sizing modification on CF surfaces is a conventional and effective method. In this work, polyethersulfone-polystyrene sulfonate sodium (PES-NaPSS) was successfully synthesized by UV illumination. A novel surfactant-free aqueous PES-NaPSS sizing agent was prepared by emulsion/solvent evaporation method to regulate the interface of CF/PEEK composites. From the XPS and SEM results, it can be seen that PES-NaPSS was uniformly coated on the CF surfaces, which introduced the reactive groups on the CF surfaces. The PES-NaPSS sizing agent exhibits good thermal performance and storage stability, meeting the needs for high temperature processing of CF/PEEK composites. Compared with the unsized CF/PEEK composites, the ILSS, flexural strength and modulus of the 0.9 wt% PES-NaPSS modified CF/PEEK composite are improved by 32.8 %, 40.3 % and 37.4 %, respectively. Accordingly, the mechanisms of the interface improvement are physical riveting, chain entanglement, chemical and physical interactions between the PES-NaPSS and PEEK matrix. This green and effective method of interface improvement will supply a prerequisite for the extensive application of CF/PEEK composites.
研究领域:
材料科学
·
复合材料
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产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2021
·Vol. 24
·期 3
·2100940
·
IF 3.862
Liubo Liang,Botao Jiang,Tonghua Wu,Youmei Ma,Shuling Zhang,Guibin Wang
Glass fiber/poly(ether ether ketone) (GF/PEEK) composite foams with improved compressive strength and heat resistance can be successfully prepared using a simple and environmentally friendly supercritical carbon dioxide (sc-CO 2 ) foaming technology. The cell morphologies of the foams can be controlled by adjusting the GF content and foaming parameters, including the saturation temperature, saturation time, saturation pressure, and depressurization rate. With a foam density of 0.55 g cm −3 , the PEEK-based composite foam having 30% GF content has a 10% compressive strength of 11.07 MPa, and its density varies negligibly up to 330.0 °C. The GF/PEEK composite foams having high GF contents show significantly better properties than those having low GF contents as a result of the supporting and strengthening effect of the GF in the PEEK cell walls. The GF/PEEK composite foams also show good corrosion resistance. As a result of these properties, the GF/PEEK composite foams are promising high-performance materials for use in extreme environments.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）