MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2014
·Vol. 215
·期 10
·1012-1021
·
IF 2.451
Wenchao Ma,Haochuan Chen,Yuhong Ma,Changwen Zhao,Wantai Yang
With fac -Ir(ppy) 3 as photoredox catalyst and ethyl 2-bromoisobutyrate (EBiB) as initiator, the homopolymerization of methyl methacrylate (MMA) in different solvents, such as N , N -dimethylformamide (DMF), acetonitrile, and anisole are run under irradiation of an LED lamp. The results show that anisole is a better solvent for the polymerization with regard to the polydispersity index (PDI). A well-controlled polymerization of poly(ethylene glycol) methyl ether methacrylate (PEGMA) is demonstrated and the clean block copolymer of PMMA- b -PPEGMA is prepared with PDI less than 1.3; however, the 2-(dimethylamino) ethyl methacrylate (DMAEMA) polymerization is poorly controlled. With the PMMA as macromolecular initiator, the block copolymer PMMA- b -PDMAEMA can be prepared with PDI around 2.0.
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2017
·
IF 4.075
Qiongzhen Liu,Bo Wang,Jiahui Chen,Fei Li,Ke Liu,Yuedan Wang,Mufang Li,Zhentan Lu,Wenwen Wang,Dong Wang
In present work, polypyrrole (PPy) has been in-situ polymerized on a poly(vinyl alcohol- co -ethylene) (PVA- co -PE) nanofirous textile to form a 3D interconnecting PPy nanowires/nanofibrous textile composite electrode (designated as NW-PPy/NFs/PET). It demonstrates that the introduction of anthraquinone-2-sulfonic acid sodium (AQS) can tune the morphology of PPy from nanospheres to nanowires. The resulting PPy@PVA- co -PE conformal nanofibers act as bridges among intertwined PPy@PET fibers and PPy nanowires, leading to continuous pathways for ion/electron transfer and larger surface area for faradic reaction. Benefiting from this unique structure, the two-electrode supercapacitor using NaCl solution as electrolyte delivers a high power density of 800 W kg −1 at an energy density of 20 W h kg −1 per mass of active materials. Furthermore, the symmetric all-solid-state NW-PPy/NFs/PET supercapacitor demonstrates high flexibility and cycle stability. Therefore, this work may open a new way to develop light weight and cost-effective electrodes for flexible energy storage devices.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2017
·
IF 4.95
Tingting Xu,Bo Chi,Jian Gao,Meilin Chu,Wenlu Fan,Meihui Yi,Hong Xu,Chun Mao
A simple and accurate immune sensor for quantitative detection of α-Fetoprotein (AFP) was developed based on the immobilization of antigen on the surface of Hep-PGA-PPy nanoparticles modified glassy carbon electrodes (GCE). The obtained Hep-PGA-PPy nanoparticles were characterized by fourier transform infrared (FT-IR) spectra and transmission electron microscopy (TEM). And the blood compatibility of Hep-PGA-PPy nanoparticles was investigated by in vitro coagulation tests, hemolysis assay and whole blood adhesion tests . Combining the conductive property of polypyrrole (PPy) and the biocompatibility of heparin (Hep), the Hep-PGA-PPy nanoparticles could improve not only the anti-biofouling effect the electrode, but also improved the electrochemical properties of the immune sensor. Under optimal conditions, the proposed immune sensor could detect AFP in a linear range from 0.1 to 100 ng mL −1 with a detection limit of 0.099 ng mL −1 at the signal-to-noise ratio of 3, and it also possessed good reproducibility and storage stability. Furthermore, the detection of AFP in five human blood samples also showed satisfactory accuracy with low relative errors. Thus, the developed immune sensor which showed acceptable reproducibility, selectivity , stability and accuracy could be potentially used for the detection of whole blood samples directly.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Yun Xue,Xingan Feng,Jiadong Wang,Jianzhang Gao,Lijun Zhang,Qi Chen,Fuqiu Ma,Yongde Yan
The immobilization of uranium in nuclear wastewater is of paramount importance for environmental and human health. However, there is a paucity of research on the immobilization of uranium in alkaline wastewater, particularly with regards to the application of novel electrodes. This article presents the utilization of an electrochemically polymerized polypyrrole stainless steel (PPy-SUS304) electrode for the effective electrochemical deposition and removal of uranium from alkaline wastewater containing uranium. According to the electrodeposition results, the uranium deposition efficiency of the novel electrode reached 96.82 %, with a uranium deposition rate of 0.048 mg U/(h·cm 2 ) and a charge efficiency of 0.055 mg U/C. These findings demonstrate the successful electrochemical reduction of UO 2 (CO 3 ) 3 4- in alkaline uranium-containing wastewater using the novel electrode, resulting in improved charge deposition efficiency. The electrode surface products were investigated using scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), and X-Ray Photoelectron Spectroscopy (XPS). The SEM and EDS results demonstrate the formation of a uniform PPy film on the surface of SUS304. In addition, the White light interferometer (WLI) test reveals that the PPy-SUS304 electrode exhibits increased roughness compared to the SUS304 electrode. The XPS results revealed that the electrode surface products of PPy-SUS304 were actually U compounds constituted of U(IV) oxides or hydroxides. This study provides a new perspective for the development of novel electrodes to suppress side reactions and efficiently recover uranium from alkaline uranium-containing wastewater.
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Yiqing Wu,Xiangmei Ma,Bin Wang,Yanan Li,Shengtao Gao
The detrimental effects of ultraviolet (UV) and electromagnetic (EM) radiation on human health and physiological functions are well documented. The development of efficient shielding materials to mitigate these effects is therefore an urgent necessity. In this study, Zn/Ti-LDH@Ce/Fe-MOF@PPy composites were successfully prepared by hydrothermal synthesis and interfacial polymerisation. The properties of the composites were compared and analysed with those of pure Zn/Ti-LDH and Ce/Fe-MOF, and the results show that the prepared materials have excellent comprehensive properties, with a broad EAB of 5.2 GHz and a RL min of −46.2 dB at 14.8 GHz at the thickness of 3 mm, while exhibiting excellent UV shielding capability.The present study offers novel concepts and efficacious methodologies for the engineering of high-performance microwave absorbing and UV shielding materials.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yukun Yang,Xiaoyi Zhang,Xiaomin Wang,Xu Jing,Ligang Yu,Baoqing Bai,Tao Bo,Jinhua Zhang,Hailong Qian,Ying Gu
As an emerging porous material, hydrogen-bonded organic framework materials (HOFs) still pose application challenges. In this work, the designed type “I + II” heterojunction extracted hot electrons from HOFs using quantum dots (QDs) and polypyrrole (Ppy), improving the stability and photoelectrochemical performance of materials. In addition to serving as a potential well, electropolymerized Ppy was used as a recognition element for bisphenol A (BPA), and a novel self-powered molecularly imprinted photoelectrochemical (MIP–PEC) sensor was designed. The sensing platform showed a linear relationship from 1 × 10 −10 to 1 × 10 −7 mol∙L −1 and from 1 × 10 −7 to 1 mol∙L −1 with an acceptable detection limit of 4.2 × 10 −11 mol∙L −1 . This is the first application of HOFs in constructing MIP–PEC sensors and a new attempt to improve the stability of HOFs for the application of porous crystal materials in the sensing field.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Yuliang Zhang,Yang Xu,Fei Wang,Wenchao Huang,Yanhua Lei,Xiaofeng Li,Xiaojing Sui,Zhiyan Li,Xueting Chang
This study presented a fabrication protocol for a multifunctional coating integrating photothermal responsiveness, self-lubrication, and self-healing properties. The coating was engineered by encapsulating tung oil (TO) within a polysulfone (PSF) matrix, leveraging the photothermal conversion capability of photothermal fillers to achieve localized thermal activation for on-demand lubricant release and crack repair. The PSF-encapsulated tung oil microcapsules (PSF-TO) and polypyrrole-coated boron nitride (PPy@BN) were uniformly dispersed in epoxy resin, followed by spin-coating or trickle-coating onto substrate surfaces. The coated substrate was thermally cured to form a robust composite film, with its photothermal performance, tribological performance, and self-healing capability systematically evaluated. The coating was able to reach a surface temperature of 83 °C under one sunlight intensity and was able to repair surface scratches within 155 s. At the same time, its delayed icing time can reach 380 s, and under a sunlight intensity, the surface icing can be melted and slipped off within 75 s. This work provided a scalable strategy for extreme mechanical environments, such as marine and aerospace applications.
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITE STRUCTURES
·
2025
·
IF 7.1
Xiaopeng Wu,Bin Zhou,Tao Lu,Zhaohu Ding,Huiming Ning,Ning Hu,Libin Zhao,Xinyu Qi
Developing advanced carbon fiber reinforced polymer (CFRP) with structure–function integrated characteristics holds considerable significance in the aerospace and military industries. Herein, electrospun polymide (PI) nanofibrous veils loaded with conductive polypyrrole (PPy) were incorporated into the interlayer of CFRP to simultaneously enhance the interlaminar properties, through-thickness electrical conductivity and electromagnetic interference shielding (EMI) properties. Experimental results demonstrate a remarkable 179.58 % increase in mode Ⅱ interlaminar fracture toughness compared to the plain specimen. Detailed analysis reveals the enhancement is driven by multiple toughening mechanisms, including matrix plastic deformation and cracking, nanofibers stretching and breakage, matrix-fiber debonding, as well as cracks deflecting and cross-layer migration. Importantly, incorporating these hybrid nanofibrous networks doesn’t compromise the overall mechanical integrity of CFRP, instead it results in a 30 % improvement in interlaminar shear strength over the baseline composites. Furthermore, the unique alternating sandwich lay-up structure, combined with the excellent electromagnetic wave attenuation properties of the nanofibrous veils, leads to a 1406 % increase in through-thickness electrical conductivity and a 211.68 % enhancement in EMI effectiveness compared to unmodified CFRP laminates. This study not only underscores the potential of hybrid nanofibrous veils in multifunctional composite design but also provides an efficient strategy for developing high-performance CFRP tailored for demanding applications.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Zelin Chen,Keyu Guo,Fengguo Yan,Daohu Sheng,Siyao Cheng,Weiqiang Wang,Ruru Gao,Weijin Li,Aming Xie
Interfacial polarization has been proved to significantly contribute to the effective absorption of electromagnetic waves (EMW). However, a model that clearly defines the contribution of interfacial polarization has yet to be developed. In this work, a layer of WO 3 was introduced within the WS 2 /PPy nanocomposites by oxidation to create a heterojunction interface, resulting in the formation of a WS 2 /WO 3 /PPy nanocomposite material. The experiments demonstrated that interfacial engineering could significantly enhance the electromagnetic wave absorption capability of the material. The WS 2 /WO 3 /PPy composite achieved a minimum reflection loss (RL min ) of −58.87 dB at a thickness of 3.3 mm and an effective absorption bandwidth (EAB) of 6.72 GHz at a thickness of 2.3 mm. This work clarifies the impact of interfacial polarization on EMW absorption, providing a feasible approach for designing novel, high-efficiency EMW absorbing materials.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Wei Zhang,Hengrui Wang,Siyi Ji,Yongqian Shi,Jiefeng Gao,Long-Cheng Tang,Pingan Song
In today's digital era, electromagnetic radiation pollution and fire hazard stand as a dual-edged sword, not only diminishing the efficacy of sophisticated electronic devices but also threatening human health. As a result, the pursuit of advanced electromagnetic shielding materials with high flame retardancy has ascended to the forefront of research priorities, underscoring their crucial role in mitigating these risks. In this study, pyrrole polymerization was employed to obtain a modified PPy-MXene, which was used to construct flame retardant modified MXene aerogel composites by the "Concreting" method. It was found that peak heat release rate, the total heat release, peak CO₂ production rate, peak smoke production rate and total smoke release of the C 1 M 2 MT FRs were reduced by 67.7 %, 46.7 %, 71.4 %, 71.7 % and 77.3 %, respectively. Furthermore, the average electromagnetic interference shielding effectiveness of C 1 M 2 MT FRs in the X-band and K-band reached 67.3 dB and 91.4 dB, respectively. It was noted that CMMT FRs had the ultra-low reflectivity (as low as 0.14). Additionally, the mechanical durability and strength of the aerogel composites were obviously enhanced, with compressive stress increased by a factor of 3.2, in comparison with that of the CNF aerogel.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jingru Huang,Haiyan Zhao,Na Li,Min Cui,Cong Zhang
Sunset yellow(SY) is a synthetic azo food dye, which is extensively utilized in the food processing industry. Nevertheless, its potential detrimental impacts on human health necessitate meticulous consideration. Consequently, the development of a user-friendly and rapidly responsive assay for the monitoring and analysis of SY in food products is of utmost importance. This study introduces an innovative electrochemical sensor based on polyoxometalates decorated with polypyrrole and multi-walled carbon nanotubes [Co 4 (PW 9 O 34 ) 2 @PPy-MWCNTs] for SY detection. The Co 4 (PW 9 O 34 ) 2 composite was prepared by using the nitrogen-containing ligand (1,4-bis (1-imidazolyl) butane) and the conductive polypyrrole was coated on Co 4 (PW 9 O 34 ) 2 , which avoided the solution of polyoxometalates in the electrolyte and improved the electrochemical stability. Multi-walled carbon nanotubes was employed to further enhance electron transfer rate. Research has shown that Co 4 (PW 9 O 34 ) 2 @PPy-MWCNTs exhibits superior electron transfer rates and remarkable electrocatalytic activity, which significantly amplify the oxidation signal of SY. Under optimal experimental conditions, the established detection range for SY is 10–1150 μM, with a detection limit of 0.425 μM. Additionally, the Co 4 (PW 9 O 34 ) 2 @PPy-MWCNTs modified electrode has good anti-interference and stability. The Co 4 (PW 9 O 34 ) 2 @PPy-MWCNTs modified electrode was successfully applied to detect SY in Fanta with yielding recovery rates between 97.79 % and 101.48 %, demonstrating substantial application potential as an effective means for SY detection.
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2025
·
IF 1.1
Zhi Lei,Kunlan Diao,Kuntian Li,Daohai Zhang,Shuhao Qin
The hydrophilic and antifouling polymeric membranes attract more and more attention. Herein, functionalized MWCNTs/SP composite films were facilely fabricated by blending sodium styrene maleic anhydride (SMANa), polyethersulfone (PES), polyvinyl pyrrolidone (PVP K30), and functionalized MWCNTs. In addition, a gas-phase polymerization method was employed to deposit a PPy layer on the SP composite film, yielding conductive functionalized MWCNTs/PSP composite films, to prepared the conductive the functional-MWCNTs/PSP composite films with anti-pollution ability, high permeability and high selectivity. Among them, the addition of functional-MWCNTs increased the permeation flux and anti-pollution ability of the films. The MWCNT-NH/PSP composite film demonstrated remarkable performance with pure water flux of 453.9 L/(m 2· h) and methylene blue retention rate of 79.05%. Finally, MWCNTs-NH was co-blended with GO to construct an excellent conductive network, so that MWCNT-NH, GO and PPy had a synergistic effect to enhance the conductivity of the films, thereby improving the membrane’s retention performance of dyes and ions through enhanced electrostatic effect. Furthermore, the optimized MWCNT-NH/GO/PSP-2 composite film achieved maximum Congo red permeability of 252.44 L/(m 2· h) while maintaining high salt retention rates of 47.2% for NaCl and 61.0% for MgSO 4 .
✓ 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）