DESALINATION
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2025
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IF 9.8
Huimin Ruan,Zhipeng Xu,Junyao Wang,Meng Wang,Zhihao Lin,Ning Ding,Daohui He,Jiangnan Shen
Ion exchange membranes have become indispensable in seawater desalination and wastewater treatment. However, traditional membranes with high ion exchange capacity suffer from excessive swelling. Meanwhile, overcoming the “trade-off” between membrane dimensional stability and ionic conductivity remains a critical challenge. In this work, a series of fluorinated polyaryl ether-based anion exchange membranes (AEMs) with varying hydrophobic chain content were designed. Results indicated that the incorporation of a rigid polymer backbone and the introduction of fluorinated groups exert a significant influence on the electrochemical properties of ion exchange membranes. The optimal QFPAE-x membrane exhibited good dimensional stability even at a high ion exchange capacity (IEC) of 2.16 mmol/g with a low swelling rate of 6.73 % at 25 °C. The membrane showed a surface resistance of 1.65 Ω·cm 2 and a water uptake of only 15.83 %. Furthermore, its cross-linking-free structure enabled superior dimensional stability and desalination performance. Electrodialysis desalination experiments show that the current efficiency and energy consumption perform better than commercial membranes. The cycle desalination experiments demonstrated the durability of the QFPAE-x membranes. This work demonstrates that fluorinated polyaryl ether AEMs with optimized hydrophobic chains effectively balance ion exchange capacity and dimensional stability, holding potential for efficient desalination and water treatment applications.
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ANALYTICA CHIMICA ACTA
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2025
·
IF 6
Weisheng Xue,Baoshan He,Xiaoyu Cao,Lingling Xie,Yao Liu,Wenhong Zhao,Wenjie Ren,Yiwei Xu
Background Bisphenol A (BPA) is a common monomer in polycarbonate plastics and epoxy resins that can migrate into food and water under extreme conditions, posing significant health risks including endocrine disruption, infertility, and metabolic disorders. Conventional detection techniques such as HPLC, HPLC-MS, and ELISA offer high sensitivity but suffer from costly instrumentation, complex pretreatment, and limited field applicability. Aptamer-based biosensors provide an attractive alternative due to their high specificity, low cost, and ease of use. Dual-mode platforms integrating colorimetric and fluorescent signals can overcome the limitations of single-mode detection Results Here, we developed an electrostatic–FRET coupled dual-mode aptasensor for BPA detection using cysteamine-modified gold nanoparticles (CS-AuNPs) and a FAM-labeled aptamer. In the absence of BPA, FAM-aptamer adsorbed onto CS-AuNPs, leading to fluorescence quenching and colloidal stability. Upon BPA binding, aptamer conformational change suppressed electrostatic adsorption, resulting in fluorescence recovery and nanoparticle aggregation with a visible color shift. Under optimized conditions, the fluorescence mode displayed a linear response from 10–1000 nM with a detection limit of 1.19 nM, while the colorimetric mode showed a range of 25–1000 nM with a detection limit of 2.22 nM. The dual-mode system demonstrated high selectivity against BPA analogues and reliable recoveries (92.7–109.2%) in spiked tap water, confirming its accuracy and robustness in real sample analysis Significance This study presents a cost-effective and visually responsive aptasensor that integrates electrostatic adsorption and FRET for sensitive BPA detection. By combining fluorescence and colorimetric modes, the platform achieves complementary readouts, reducing false positives and enhancing detection reliability. The work highlights the potential of positively charged AuNPs in multimodal biosensing, offering a promising tool for environmental monitoring and food safety assessment.
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POLYMER COMPOSITES
·
2025
·
IF 4.7
Shuai Yang,Yang He,Zijian Song,Sitong Wang,Jiaying Liu,Ziyun Li,Yingchun Li
In this paper, a series of shape memory poly(aryl ether ketone)s (PAEKs) with tunable T g were synthesized, and physically blended to fabricate the quadruple shape memory PAEK materials. Besides, the ultrasonic assisted exfoliated boron nitride nanosheets (BNNSs) were integrated into PAEK matrix for the preparation of the composites with enhanced mechanical properties, thermal conductivity and dielectric performances. Besides, we used 20 wt% BNNSs/PAEK composite as material matrix to fabricate the smart heat management device, which could automatically switch between “Normal” and “Efficient” heat dissipation mode as the environment temperature changed. Furthermore, through the programming manipulations at different transition temperatures, the smart device performed the graded heat dissipation behaviors due to the intrinsic quadruple shape memory properties of PAEK matrix. Four different working modes, including “Normal”, “Grade I”, “Grade II” and “Grade III” modes, for the increasable heat dissipation efficiency, were automatically switched upon the increasing temperature of external heating source. Highlights Designing molecular chains ensured quadruple shape memory behaviors. Exfoliated BNNSs were integrated for enhanced thermal conductivity. Increasable heat dissipation efficiency determined four work modes. Regional and personalized heat dissipation requirements were fulfilled.
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POLYMER
·
2025
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IF 4.5
Liuyin Li,Feng Zhang,Pengpeng Xu,Jiayu Su,Yuanhang Chen,Shuhui Yu,Zhenwen Zhou,Suibin Luo
Epoxy-based composites with excellent dielectric, thermal and hydrophobic properties are highly desired in advanced electronic packaging, especially for achieving ultralow dielectric constant ( D k ) and dielectric loss ( D f ) in high-frequency and high-speed applications. Introducing low-polarity functional groups, such as symmetrical fluorine and active ester moieties, has been proven to be an effective method for reducing the D k and D f , respectively. Herein, a fluorinated active ester (HFBAAE) incorporating symmetric trifluoromethyl and active ester groups was designed and synthesized as a curing agent for epoxy composites. Ultralow D k of 2.67 and D f of 0.006 at 20 GHz are achieved for the HFBAAE cured SiO 2 /epoxy composites. Moreover, excellent dielectric stability under humid-thermal conditions is observed owing to the low water absorption (<0.7 wt%). Additionally, a high thermal decomposition temperature of 385 °C, a high glass transition temperature of 129 °C, and a low coefficient of thermal expansion of 33 ppm °C −1 are obtained. This fluorinated active ester curing agent offers a promising strategy for tailoring and enhancing the dielectric, thermal and moisture-resistance properties of the epoxy-based dielectric composites.
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RENEWABLE ENERGY
·
2025
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IF 9.1
Fenglong Chen,Lingxin Meng,Jingmei Xu,Hongqi Liang,Kuirong Feng,Tian Lan,Jiayin Wang,Qingyuan Shi
The sulfonated poly(arylene ether ketone sulfone)s which contains fluorenyl groups (F-SPAEKS) as proton exchange membranes (PEMs) matrix is prepared. UiO-66-NH 2 -PO 4 H 2 (PUIN) is synthesized based on UiO-66-NH 2 as a template for immobilizing phosphate groups onto MOFs by chemical bonding via Schiff base reaction. UiO-66-SO 3 H-PO 4 H 2 (SPUIN) is prepared via ring-opening of 1,3-propanesulfonolactone, where -SO 3 H is introduced at the -NH 2 site of PUIN. The hybridized PEMs (FSSPU-X) are obtained by adding SPUIN as fillers into F-SPAEKS polymers. From all prepared PEMs, FSSPU-7 which means the weight ratio of SPUIN is 7% shows the best performances in comprehensive aspects. The H + conductivity of FSSPU-7 is enhanced to 247.38 mS cm -1 and the peak power density is 1140 mW cm -2 with 0.48 mg cm -2 Pt/C loading. At the same time, the swelling ratio of FSSPU-7 remains below 17%. Besides, FSSPU-7 has a maximum tensile strength up to 32.37 MPa. And the proton conductivity of FSSPU-7 is consistently maintained at about 240 mS cm -1 after 144 hours of long-term stability test. Therefore, the preparation of PEMs with a high level of performance is expected by introducing phosphoric acid and sulfonic acid bi-functionalized UiO-66 into F-SPAEKS.
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FOOD CHEMISTRY
·
2018
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IF 4.946
Hai-Long Jiang,Yun-Liang Lin,Na Li,Zhi-Wei Wang,Meng Liu,Ru-Song Zhao,Jin-Ming Lin
Magnetic N -doped carbon nanotubes were firstly applied as adsorbent in food analysis for pre-concentration of bisphenols in fruit juices followed by ultra-high performance liquid chromatography-tandem mass spectrometry determination. The magnetic nanoparticles were characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy and vibrating sample magnetometer. The adsorption conditions were further optimized by response surface methodology. Under optimal conditions, the method provided good linearity with correlation coefficient ( r ≥ 0.9979), excellent intermediate precisions (2.71–5.91%, n = 3), low limits of detection (LODs) ranging from 0.43 to 2.47 ng L −1 , and satisfying recoveries of three juice samples (between 90.6% and 101%).
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RAPID COMMUNICATIONS IN MASS SPECTROMETRY
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2017
·Vol. 31
·期 11
·937-950
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IF 1.998
Na Wei,Zhenjia Zheng,Yuhua Wang,Yanduo Tao,Yun Shao,Shuyun Zhu,Jinmao You,Xian-En Zhao
Rationale Endocrine-disrupting chemicals (EDCs) in environment samples and food stuffs are an increasing serious public health issue due to their potency to interfere and deregulate several aspects of the endocrine system. Because of their extremely low abundance, it remains a challenging task to develop a sensitive detection method. Methods 4'-Carbonyl chloride rosamine (CCR) was used as a derivatization reagent for EDCs for the first time. A new ultrasound-assisted in situ derivatization/dispersive liquid-liquid microextraction (UA-DLLME with in situ derivatization) method for multiple EDCs including five estrogens, two alkylphenols, eight bisphenols, seven parabens and triclosan coupled with ultra-high-performance liquid chromatography/tandem mass spectrometry (UHPLC/MS/MS) has been developed and validated. Results The ionization efficiency of EDCs was greatly enhanced through the introduction of a permanent charged moiety of CCR into the derivatives during electrospray ionization (ESI)-MS analysis. The main variables potentially affecting the UA-DLLME with in situ derivatization process are optimized. The recoveries and matrix effects of 23 EDCs for the spiking samples were in the range of 83.0–116.0% and 85.8–114.6%, respectively. Good method reproducibility was achieved. Conclusions The limits of detection (LODs) for 23 EDCs were 0.05–0.40 ng/L and 0.03–0.25 ng/g (dry weight, d.w.) for environment samples and food stuffs, respectively. The proposed method has been demonstrated to be suitable for simultaneous determination of multiple EDCs in real samples with high sensitivity, speediness, and good sample clean-up ability. Copyright © 2017 John Wiley & Sons, Ltd.
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TALANTA
·
2017
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IF 4.162
Zhouyang Li,Yiwen Yang,Yanbo Zeng,Jianbo Wang,Haiqing Liu,Longhua Guo,Lei Li
This paper reports novel imidazole fluorescent poly(ionic liquid) nanoparticles (FPILNs) of poly(1-[(4-methyphenyl)methyl]-3-vinyl-imidazolium bromide (poly([MVI]Br) for selective and sensitive determination of pyrogallol . An imidazole ionic liquid of 1-[(4-methyphenyl)methyl]-3-vinyl-imidazolium bromide ([MVI]Br) was synthesized and used as the only monomer to obtain poly([MVI]Br) possessing phenyl fluorophores using a radical polymerization technique. The obtained poly([MVI]Br) can form nanoparticles in water. Scanning electron microscopy and dynamic light scattering results revealed majority of poly([MVI]Br) FPILNs with diameters ranging from 40 to 400 nm. Although [MVI]Br showed weak fluorescence intensity , poly([MVI]Br) FPILNs exhibited strong fluorescence intensity with a quantum yield of 0.192, which is attributed to the presence of significant number of phenyl fluorophores and rigid construction. The selective and sensitive determination of pyrogallol was achieved through fluorescence quenching of poly([MVI]Br) FPILNs, and the quenching was attributed to the oxidation of poly([MVI]Br) FPILNs by O 2 ˙¯ produced by pyrogallol autoxidation . The poly([MVI]Br) FPILNs-based sensor demonstrated a good linear relationship between the extent of fluorescence quenching and the concentration of pyrogallol in a range of 0.05 – 10.0 μM, achieving a detection limit of 0.01 μM. Furthermore, the poly([MVI]Br) FPILNs-based assay detected pyrogallol in environmental water samples, suggesting its potential to be applied for practical purposes.
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Journal of Materials Chemistry A
·
2025
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IF 9.5
Kai Yan,Jun Wang,Yan Zong,Qunna Xu,Fei Xu,Tongtong Wang
Fabric-based wearable devices have gained significant attention as next-generation flexible electronics. However, traditional fabric sensors are limited by their dense woven structures, which hinder moisture-wicking and self-powered applications. There is an urgent need to develop more portable fabric sensors that combine efficient moisture-wicking with versatile sensing capabilities. In this work, a Janus-structured fabric sensor integrating moisture-wicking (unidirectional wetting) characteristics, superior ionic thermoelectric (i-TE) properties and strain sensing capabilities was developed. The Janus fabric sensor was fabricated through a two-step sequential modification process. First, a layer of conductive polypyrrole (PPy) was synthesized directly on the fabric surface through in situ polymerization. Second, asymmetric surface modification was achieved: an i-TE gel was spray-coated onto one side of the fabric, while 3-(trimethoxysilyl)propyl methacrylate and poly(ethylene glycol) methacrylate were applied to the opposite side to create a hydrophilic surface. The i-TE gel was prepared by incorporating 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide into fluorine-modified polyurethane. The Janus fabric sensor, with its asymmetric architecture, achieved effective moisture-wicking and liquid transport against gravity within 2 s. It exhibited sensitive motion-sensing performance with a gauge factor of 9.37 while simultaneously showing outstanding thermoelectric properties, characterized by a Seebeck coefficient of 4.84 mV K−1 and a power factor of 32.8 μW mK−2. These attributes enabled the monitoring of different human activity stages in a wearable self-powered mode. More significantly, the sensor's rapid response time of 0.2 s to flame exposure enabled common household textiles to serve as fire-warning systems. It holds a great promise as a platform for next-generation smart textiles.
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Advanced Science
·
2025
·
IF 14.1
Shuo Yang,Sizhe Tang,Yufeng Cai,Zhiming Ye,Xiangbin Zou,Xueyu Yuan,Yujie Song,Bing Li,Dongyan Tang,Ming Liu
Passive thermal-regulation strategies have become increasingly important due to the strain alleviated on power grids for temperature management. Designing a system capable of automatically switching between cooling and heating modes in response to changing ambient conditions presents several specific challenges that engineers and researchers are actively addressing. In this research, a CaCl 2 incorporated PNIPAM coated fluorinated poly(aryl ether) (FPAE) porous film with tunable reflectance is developed. The aim is to mitigate the reliance on active cooling systems, which consume significant amounts of energy. The moisture-temperature dual sensitive film exhibits a tunable reflectance range between 91.1% and 39.1% via phase change of the PNIPAM layer. Coupled with an infrared emissivity of 96.0%, a daytime cooling of 10 °C compared to the control experiment is achieved. Coating the film with a photothermal layer results in an adaptive Janus film that is capable of autonomous switching between heating and cooling, and demonstrates a heating of 22.5 °C in a cold environment. The facile preparation method, excellent cyclic stability, mechanical properties, and UL-94 V-0 rating enable promising applications of the smart film under diverse living environments.
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EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Jie Liu,Jun Yang,Zijia Zhang,Qian Jiang,Lele Sun,Chaoyi Peng,Jin Wang,Li Xiang,Anlian Pan
In order to prepare polyimide materials with excellent optical transparency and UV barrier, the effects of the number and substitution position of −CF 3 groups on polyimide properties were investigated. Researchers synthesized four novel diamine monomers (BPA-O, BPA-NH 2 , BPAF-O, BPAF-NH 2 ) and synthesized eight high-performance colorless polyimides (PI-1 ∼ PI-8). On the one hand, the strong electron-withdrawing effect of −CF 3 restricts electron movement within the molecular chain, weakening the CTC effect of the molecular chain and thereby enhancing the transparency of the film. On the other hand, the ortho -substitution of −CF 3 on the imide ring induces greater twisting of molecular chains, disrupts their close packing, and thereby exerts a positive effect on enhancing the optical transparency of the film. The high bond energy of the C-F bond and the introduction of the flexible group −O- act as an “energy buffer,” suppressing UV-induced main chain breakage and achieving high UV barrier. All CPI films exhibit excellent transparency and thermal stability, with a cut-off wavelength range of 325 nm-381 nm and a transmittance range of 78.7 %-88 % at 550 nm. They have good optical properties, with T d5% distributed in the range of 511.5 °C − 533.7 °C, and the glass transition temperature ( T g ) distributed in the range of 197.3 °C-234.4 °C, demonstrating good thermal stability. Additionally, the cut-off wavelength is at a relatively high level, reaching up to 381 nm.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Lvyuan Chen,Kungang Chai,Dongli Li,Youquan Zhang,Fang Lai
Under the challenge of efficiently removing bisphenols (BPs) from contaminated water, we herein present the synthesis and evaluation of two rigid aromatic β-cyclodextrin polymers with hierarchical porous networks (RACP-HPNs) via an integrated polymerization–crosslinking strategy. The materials were characterized by multiple techniques to verify their structures. Adsorption experiments revealed that RACP-HPN exhibited an excellent overall adsorption performance and rapid kinetics. Its adsorption capacity for BPA reaches 542.2 mg g −1 , which equilibrates within only 3 min, and it retains over 96 % of the adsorption performance after six regeneration cycles. Effective removal was achieved under various solution conditions, and the performance was closely dependent on the molecular configuration and size of the bisphenol substrates. Theoretical calculations confirmed that the efficient adsorption originated primarily from van der Waals forces, hydrogen bonding and π–π interactions, while its hierarchical pore architecture promotes mass transfer and accessibility to active sites. These findings indicate that RACP-HPN is a promising and rigid adsorbent for efficient removal of bisphenol compounds.
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危险品化学品经营许可证（带存储）