JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 35
·e55891
·
IF 2.7
Zhoufeng Wang,Xiubo Long,Bolin Wang,Guojun Cheng,Guoxin Ding,Yingying Liu,Wenlong Yao
A range of new fluorine-containing copolyarylates were successfully produced through interfacial polymerization using hexafluorobisphenol A (BPAF) featuring a symmetric trifluoromethyl group structure, bisphenol B (BPB), and two acyl chloride monomers as raw materials. The results indicated that the synthesized amorphous copolyarylates exhibited good solubility, with number average molecular weights ( M n ) of 19,000–44,000 g/mol, weight average molecular weights ( M w ) of 66,000–159,000 g/mol, and intrinsic viscosities of 0.66–1.19 dL/g. The thermal stability of copolyarylates increased with the increase of BPAF monomer content (0~100%), which was manifested by the linear increase of glass transition temperature ( T g ) from 201.6 to 237.1°C, and the increase of 5% thermogravimetric weight loss temperature ( T 5% ) from 474.1 to 491.5°C. The tensile strength of copolyarylates ranged from 52.63 to 59.93 MPa, the tensile modulus ranged from 1102.08 to 1502.84 MPa, and the elongation at break ranged from 32.0 to 75.5%. In addition, the copolyarylates had good dielectric properties with a dielectric constant of 2.58–3.75 at 10 7 Hz and a dielectric loss tangent of 0.021–0.028.
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POLYMER
·
2024
·
IF 4.1
Boang He,Yufeng Chen,Yuan Liang,Hai Wan,Wei Liu,Zhongtao Xu,Shihang Dong,Yuwei Chen,Peng Wei,Shuohan Huang,Yong He,Yanping Wang,Yumin Xia
In this study, a series of low dielectric liquid crystal polyarylates were designed and synthesized through the acetylation of hydroxyl-containing monomers followed by melt polycondensation with 4-hydroxybenzoic acid (HBA), 6-hydroxy-2-naphthoic acid (HNA), bisphenol A (BPA), bisphenol AF (BPAF), terephthalic acid (TA) acid and 2,3,5,6-tetrafluoroterephthalic acid (TFTA). The molar ratio of HBA to HNA was controlled at 7:3. The structures of the acetylated monomers and polyarylates were characterized using FTIR and NMR spectroscopy, while the elemental composition of the polyarylates was analysed via XPS. WAXD and POM analyses revealed that the prepared polyarylates exhibit a single crystalline form and are capable of forming liquid crystals. DSC and TGA analyses indicated that the incorporation of bisphenol-type monomers (BPA or BPAF) disrupted the regularity of the main chain, leading to a decrease in both the melting point and thermal stability. Finally, the incorporation of bulky monomers (BPA or BPAF) and fluorinated monomers (BPAF and TFTA) into polyarylates increases free volume and decreases polarization, leading to a significant reduction in the dielectric constant.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Zhipeng Xu,Junyao Wang,Zhihao Lin,Daohui He,Yixiang Yu,Qiuping Wang,Meng Wang,Junbin Liao,Huimin Ruan,Jiangnan Shen
The use of proton exchange membrane water electrolysis (PEMWE) for hydrogen production is considered a promising technology due to its high theoretical current density, gas purity, and energy efficiency. In this study, a fluorinated sulfonated hydrocarbon polymer was used to prepare hydrocarbon−based membranes for PEMWE that displayed exceptional stability. Notably, the SFPAE-60 membrane has a proton conductivity of up to 293.1 mS cm −2 at 80 °C and 100%RH, but its volumetric swelling ratio is only 47 %. Its dimensional stability is significantly better than that of previously reported sulfonated poly (aryl ether)−based proton exchange membranes (>100 %). The PEMWE based on the SFPAE-60 membrane achieves a current density of over 4800 mA cm −2 at 2.0V, confirming the membrane's applicability in actual water electrolysis. The results indicate that the electrolyte membrane of fluorinated sulfonated hydrocarbon polymer performs well in the PEM electrolyzer.
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FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Yang Wan,Jia Li,Xi Wu,Pan Wu,Lin Zhang
Bisphenol A (BPA), a well-recognized endocrine-disrupting chemical, is a significant environmental contaminant linked to various health disorders. Therefore, the development of rapid and sensitive BPA detection methods is essential for accurate monitoring in complex matrices. In this study, an electrochemical biosensor was constructed that synergistically combines the catalytic activity of laccase with the conductive properties of multi-walled carbon nanotubes (MWCNTs). Laccase was effectively immobilized within a Co 3 (PO 4 ) 2 -based hybrid nanoflower through biomimetic mineralization, forming a spatially confined catalytic system. Structural characterization of the nanoflowers revealed their spherical morphology with hierarchical porosity and an average diameter of 6 μm. The laccase@Co 3 (PO 4 ) 2 /MWCNTs nanocomposite-modified glassy carbon electrode demonstrated good catalytic performance for BPA oxidation, exhibiting high sensitivity (3.592 μA·μmol −1 L) and a low detection limit of 0.015 μM (S/N = 3)). Practical applications in analyzing commercial bottled water and plastic infant bottles confirmed the biosensor's reliability. This research presents an efficient and cost-effective approach for BPA risk assessment, contributing to the protection of public health.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yifan Yin,Delu Miao,Sheping Wang,Zhiyang Gao,Luxin Zhang,Jiaqi Yang,Zhenxin Wang,Jinsuo Lu,Gen Wang
Treating endocrine-disrupting bisphenols by advanced oxidation processes (AOPs) in hypersaline polycarbonate wastewater (PCW) remains challenging due to the high-salinity conditions. Here, we present an acetylperoxyl radical (CH 3 C(O)OO • )-mediated oxidation strategy for selective bisphenol removal in hypersaline environments. Using Ru(III)/peracetic acid (PAA) as a model platform, effective removal of four priority bisphenols was achieved with substituent-dependent degradation kinetics (BPAF > BPA > BPF > BPS, k obs = 0.037–0.135 min −1 ). Employing BPAF as a model contaminant, we elucidated a dual removal mechanism that BPAF was completely removed with 16.7 % was mineralized and 15.3 % was transformed into solid-state polymers with polymerization degrees from 2 to 11. The system maintained robust performance under extreme salinity (∼14,000 mg L −1 Cl − ) with < 8.0 % efficiency loss under ∼12000 mg L −1 HCO 3 − or 250 mg L −1 humic acid. To enable practical implementation, we engineered a heterogeneous RuO 2 -membrane reactor that sustained ∼80 % BPAF removal over 12 h continuous operation (hydraulic retention time = 20 min), processing 3.6 L of simulated PCW (50 mg L −1 BPAF) with biodegradability (BOD 5 /COD) increased from 0.31 to 0.52. This work pioneers CH 3 C(O)OO • -mediated oxidation for selectively remove bisphenols in hypersaline PCW with exceptional anti-interference capacity.
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ENVIRONMENTAL MONITORING AND ASSESSMENT
·
2025
·Vol. 197
·期 8
·1-13
·
IF 3
Luo Huili,Pan Xiaopeng,Yang Yixuan,Huang Yilu,Xiang Yuhang,Li Anxin,Zhao Jia
Bisphenol analogues (BPs), the endocrine-disrupting compounds, have been detected in water, sediment, and even agricultural products. Irrigation is the main way for material migration, and it has been suggested as one of the sources of BPs. But the attention to irrigation water and sediment, and further to the ecological risks, is rare. In a hilly irrigation area in southern China, the partition and accumulation, contribution sources, and potential ecological risk of four bisphenols (BPA, bisphenol S, F, and AF) in the irrigation canal were investigated in the spring of 2023 and 2024. All four BPs were detected in the irrigation water and sediment. BPF was the dominant of 19.6–60.9 ng/L in water, while BPA was still the prominent compound (46.2–54.4% of ∑BPs) in sediment. BPs in the irrigation canal were related to the direct discharge of aquaculture, domestic, and planting drainage. Although low risks for each compound, the comprehensive risk (∑RQ) of sediments went into medium risk. BPF and BPA were the main risk contributors. BPs in sediments increased steadily during the investigation. The special accumulative point was where slow flow maintained, especially caused by the hilly change. This comprehensive study of BPs in hilly irrigation canals should be valuable for reference in similar areas. And it will be beneficial for environmental protection and production safety.
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JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Haixia Liu,Honghong Rao,Jinxin Guo,Baolan Lu,Yuyun Wang,Rongxi Zhu,Xinzhen Du
A layer-by-layer chemical bonding strategy was developed for fast in situ growth of bifunctional mesoporous covalent organic framework submicrospheres (COF SMSs) on the nickel-chromium alloy (Ni-Cr) fiber substrate via the ultrasound-assisted Schiff-base reaction for the first time. COF SMSs showed well-defined morphology, extraordinary high surface area (1211 m 2 · g −1 ) and narrow mesopore (2.50 nm) as well as excellent stability. Furthermore, the resulting Ni-Cr fiber presented outstanding adsorption capability and improved selectivity for bisphenols (BPs). Consequently, an attractive SPME-HPLC-UV approach with the Ni-Cr@Ni-Cr LDHs NSs@COF SMSs fiber was proposed for rapid preconcentration and sensitive determination of BPs. By optimizing adsorption parameters, the SPME-HPLC-UV method presented good linearity for five BPs in the ranges of 0.02–200 ng·mL −1 with coefficients of determination ( R 2 ) higher than 0.999. Limits of detection and limits of quantitation were obtained from 0.003 ng·mL −1 to 0.006 ng·mL −1 and from 0.010 to 0.019 ng·mL −1 , respectively. Moreover, the intra-day and inter-day precision expressed as relative standard deviations (RSDs) was 1.57–3.52 % and 2.65–4.38 % for the proposed method with a single fiber, respectively. RSDs of the proposed method with different duplicate fibers were 3.25–6.72 %. The proposed SPME-HPLC-UV method was available for efficient preconcentration and sensitive detection of five BPs from real water and milk samples. The relative recoveries at three spiking levels of BPs were achieved in the range of 80.00–118.8 % with RSDs below 7.81 %. In addition, the prepared fiber still exhibited satisfactory adsorption performance after 120 adsorption-desorption cycles.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hao Ming,Jinhua Mou,Carol Sze Ki Lin,Liandong Zhu
The global rise in cyanobacterial blooms risk parallels the frequent detection of endocrine-disrupting compounds (EDCs) in freshwater, raising the unexplored possibility that EDCs may covertly trigger and sustain these events. This study investigated how bisphenol AF (BPAF) and perfluorooctanoic acid (PFOA) modulated the physiology of Microcystis aeruginosa under different exposure concentrations and sequences. Single-cell transcriptomic and proteomic analyses revealed that low-level co-exposure (0.5 μM) to these chemicals enhanced cell division by 28.99 % via FtsZ upregulation and increased microcystin release by 20.11 %, accompanied by elevated tryptophan- and tyrosine-like fluorescence peaks. High-concentration exposure (5 μM) induced oxidative stress, disrupted cell division, and triggered cell enlargement and secretion of dissolved organic matters. BPAF stimulated nitrous oxide (N₂O) production to 885.11 ng/(10 6 cells·h), whereas PFOA suppressed emissions, compared to 8.93 ng/(10 6 cells·h) in the control group. The nitrogen regulator NtcA was identified as a central node linking nitrogen metabolism, oxidative stress and photosynthetic redox reactions with N₂O synthesis. Molecular docking supported stable interactions between NtcA and both compounds. These findings uncovered distinct regulatory strategies in Microcystis aeruginosa under chemical stress, offering mechanistic insights into how endocrine-disrupting pollutants reshape microbial growth and greenhouse gas emissions in aquatic ecosystems.
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TALANTA
·
2025
·
IF 6.1
Lihong Su,Luliang Wang,Lei Zhao,Yushen Liu,Chengke Wang,Chen Shao,Lu Liu,Daohong Zhang,Ibrahim A. Darwish
The development of advanced adsorbents enabling rapid and sensitive detection of endocrine-disrupting bisphenols (BPs) is essential for safeguarding ecosystems and human health. Covalent organic frameworks (COFs) hold great promise for the adsorption of BPs, but conventional rigid aromatic architectures suffer from limited molecular recognition capability. Herein, we design a hydroxyl-functionalized flexible aliphatic COF (TFT-TAH COF) via the polymerization of 2,3-dihydroxydicarbohydrazid (TAH) and 1,3,5-tris(4-formyl-phenyl) triazine (TFT) for efficient extraction and sensitive detection of BPs (BPA, BPF, BPAF, and BPF). The flexible aliphatic linker exposes more active sites, thereby displaying excellent BPs adsorption capacity (654–1111 mg g −1 ) and rapid adsorption kinetics (equilibrium within 30 s). TFT-TAH COF gave good affinity for BPs through the synergistic effects of size matching, hydrogen bonding, and π-π interactions. In addition, a novel analytical method was developed for BPs determination by coupling TFT-TAH COF-based dispersive solid-phase extraction with high-performance liquid chromatography, achieving low detection limits of 0.03–0.1 ng mL −1 and satisfactory precision with relative standard deviations≤5.7 %. Moreover, recoveries for the spiked lake, river, drinking water, bottled water, and milk samples ranged from 89.8 to 101.6 %. This work pioneers an innovative approach to fabricating flexible aliphatic-linked COFs for environmental monitoring and food safety.
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Materials Today Chemistry
·
2025
·
IF 6.7
Yujie Zhang,Yuxia Zhou,Guofei Chen,Haiyan Zhang,Xingzhong Fang
A series of poly(ester-imide)s (PEsIs) were synthesized by copolymerization of p -phenylene bis(trimellitate anhydride) (TAHQ), 4,4′-biphthalic dianhydride ( s -BPDA), and 2,2′-bis(trifluoromethyl)benzidine (TFDB) with different designed CF 3 -containing bisether-diamines. All of the PEsIs exhibited moderate glass transition temperatures ( T g s) in the range of 233–253 °C, low minimum melt viscosities of 506–3758 Pa·s, excellent dimensional stability with coefficient of thermal expansion (CTE) values of 30.4–37.1 ppm/K, and good optical properties ( T 450 of 84 %–86 %, T 850–1550 of 90 %). PEsI-IV exhibited the best comprehensive properties among the PEsIs, particularly with the lowest melt viscosity, excellent dimensional stability and high transmittance. These thermoplastic PEsIs with low CTE and high transparency have potential applications in the field of optical injection molding materials.
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JOURNAL OF SEPARATION SCIENCE
·
2017
·Vol. 40
·期 8
·1755-1764
·
IF 2.557
Sheng-Xiang Gong,Xiao-Li Wang,Wei Liu,Ming-Lin Wang,Xia Wang,Zheng-Wu Wang,Ru-Song Zhao
Aminosilanized magnetic carbon microspheres as a novel adsorbent were designed and fabricated. The adsorbent was used for the magnetic solid-phase extraction of bisphenols at trace levels from environmental water samples before liquid chromatography with tandem mass spectrometry analysis. The structure, surface, and magnetic behavior of the as-prepared aminosilanized magnetic carbon microspheres were characterized by elemental analysis, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, powder X-ray diffraction, and vibrating sample magnetometry. The effects of the experimental parameters were investigated by the Plackett–Burman design, and then the parameters that were significant to the extraction efficiencies were optimized through a response surface methodology. The aminosilanized magnetic carbon microspheres exhibited high adsorption efficiency and selectivity for bisphenols. Under optimal conditions, low limits of detection (0.011–2.22 ng/L), and a wide linear range (2–3 orders of magnitude), good repeatability (4.7–7.8%, n = 5), and reproducibility (6.0–8.3%, n = 3) were achieved. The results demonstrate that the novel adsorbent possesses great potentials in the determination of trace levels of bisphenols in environmental water samples.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2025
·
IF 8
Ying Zhang,Cheng Qin,Jiajia Pang,Xiaoxue Pan,Rehab Khaled Mahmoud,Xiaosheng Tang,Zunyao Wang,Ruijuan Qu
This study systematically investigated the degradation of bisphenol AF (BPAF) using a visible light-assisted magnetite/persulfate (Vis/magnetite/PS) system. Visible light irradiation significantly enhanced the activation efficiency of PS by magnetite, leading to improved BPAF removal. Under the optimal conditions, a removal efficiency of 91.7 % was achieved. Notably, while magnetite exhibited specificity toward PS activation, the system also demonstrated exceptional versatility by achieving 99 % degradation efficiency for methylene blue. Monochromatic light irradiation revealed wavelength-dependent degradation kinetics, with BPAF removal efficiencies following the order as: Vis > purple > red > blue > green > yellow light. Significant elevation in superoxide radical and singlet oxygen contribution rates occurred when transitioning from standard irradiation to monochromatic light or darkness. Four primary transformation pathways of BPAF were identified: hydroxylation, sulfate addition, bond cleavage, and coupling reactions. Photocoupling was found to selectively increase the abundance of hydroxylated and coupled products. The system reduced operational costs compared to zero-valent iron-based systems, owing to the utilization of natural sunlight and unprocessed magnetite ore. These findings provide fundamental insights into the wavelength-dependent synergism between light and magnetite in PS activation, offering a scalable and eco-friendly strategy for water and wastewater remediation.
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