POLYMER TESTING
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2025
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IF 6
Chang Yu,Yang Wang,Bo Jiang,Yang Yang,Jinxuan Han,Haibo Zhang,Yingshuang Shang
The rapid development in high-frequency communication has raised the demand for intrinsic low dielectric materials. Fluorinated poly(aryl ether)s (FPAEs) have gained significant attention due to their excellent dielectric properties and heat resistance. However, current methods for preparing FPAE films involve organic solvents, which generate substantial waste during large-scale production. There is an urgent need for simpler and more efficient processing methods, such as injection molding or melt processing, to overcome the limitations of solvent-based approaches. In this study, FPAEs with different molecular weights were synthesized from decafluorobiphenyl (DFBP) and bisphenol AF. The melting index and rheological tests demonstrated that FPAEs exhibited good thermal stability and melt processing performance. Notably, the dielectric loss (D f ) of FPAEs prepared by melt processing was significantly reduced (below 0.001) while their dielectric constant (D k ), mechanical strength, and flexibility remained comparable to those of FPAEs produced using solution processing. This study advances the melt processing of FPAEs with perfluorinated biphenyl groups, providing insights for large-scale production of low dielectric materials and broadening their potential applications in high-frequency communication.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 3
·628
·
IF 4.6
Yichao Gong,Yajing Guo,Qizhi Sun,Pengyan Liu
In this study, Fe 3 O 4 was used as a magnetic core, combined with the characteristics of mesoporous adsorbents, to prepare a novel magnetic mesoporous composite material named MMC. Cetyltrimethylammonium bromide (CTAB) and tetraethyl orthosilicate (TEOS) were used as functional monomers, and a simple etching method was employed. The resulting MMC was used as an effective adsorbent for the magnetic solid-phase extraction of trace residues of six bisphenol endocrine disruptors (bisphenol A, bisphenol B, bisphenol C, bisphenol F, bisphenol AF, and bisphenol AP) from environmental water and food samples. Characterization results indicated that the surface of MMC exhibited a distinct wormhole-like mesoporous structure, with the successful incorporation of CTAB functional groups and Si-OH. The crystal structure of Fe 3 O 4 remained stable throughout the preparation process. Mapping analysis confirmed the uniform distribution of CTAB functional groups without aggregation and demonstrated high magnetic intensity, enabling rapid separation and collection under an external magnetic field. Extraction and elution conditions were optimized, and tests were conducted for interfering substances such as humic acid, glucose, fructose, and sucrose under optimal parameters. The results showed that recovery rates were not significantly affected. The quality evaluation of the method demonstrated good linearity, a broad linear range, low limits of detection and quantification, and satisfactory recovery rates. Blank and spiked analyses were conducted for seven real samples, including environmental water (rivers and lakes) and food samples (dairy, juice, and carbonated beverages), with satisfactory spiked recovery rates achieved. Thus, the developed analytical method enables the analysis and detection of trace residues of various bisphenol pollutants in complex matrices, such as environmental water and food samples, providing a valuable reference for trace analysis of similar contaminants in complex matrices.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Jing Gong,Yanlong Chen,Wenwei A.,Xingyuan Zhang,Juanqiong Ma,Zhiyong Xie,Pei Li,Aihua Huang,Shusheng Zhang,Qiongfeng Liao
Persistent organic pollutants (POPs), such as perfluoroalkyl and polyfluoroalkyl substances (PFASs), polychlorinated biphenyls (PCBs), and bisphenols (BPs), have been raising global concerns due to their toxic effects on environment and human health. The monitoring of residues of POPs in seafood is crucial for assessing the accumulation of these contaminants in the study area and mitigating potential risks to human health. However, the diversity and complexity of POPs in seafood present significant challenges for their simultaneous detection. Here, a novel multi-component fluoro-functionalized covalent organic framework (OH-F-COF) was designed as SPE adsorbent for simultaneous extraction POPs. On this basis, the recognition and adsorption mechanisms were investigated by molecular simulation. Due to multiple interactions and large specific surface area , OH-F-COF displayed satisfactory coextraction performance for PFASs, PCBs, and BPs. Under optimized conditions, the OH-F-COF sorbent was employed in a strategy of simultaneous extraction and stepwise elution (SESE), in combination with HPLC−MS/MS and GC−MS method, to effectively determined POPs in seafood collected from coastal areas of China. The method obtained low detection limits for BPs (0.0037 −0.0089 ng/g), PFASs (0.0038 −0.0207 ng/g), and PCBs (0.2308 −0.2499 ng/g), respectively. This approach provided new research ideas for analyzing and controlling multitarget POPs in seafood. Environmental implications Persistent organic pollutants (POPs), such as perfluoroalkyl and polyfluoroalkyl substances (PFASs), polychlorinated biphenyls (PCBs), and bisphenols (BPs), have caused serious hazards to human health and ecosystems. Hence, there is a need to develop a quantitative method that can rapidly detect POPs in environmental and food samples. Herein, a novel multi-component fluorine-functionalized covalent organic skeletons (OH-F-COF) were prepared at room temperature , and served as adsorbent for POPs. The SESE-SPE strategy combined with chromatographic techniques was used to achieve a rapid detection of POPs in sea foods from the coastal provinces of China. This method provides a valuable tool for analyzing POPs in environmental and food samples.
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ACS Nano
·
2024
·
IF 15.8
Xinru Yuan,Jia-Xin Wang,Yunlong Li,Hao Huang,Jiahong Wang,Tongyu Shi,Yuhao Deng,Qiyu Yuan,Rui He,Paul K. Chu,Xue-Feng Yu
Increasing modal variations of stimulus-responsive materials ensure the high capacity and confidentiality of information storage and encryption systems that are crucial to information security. Herein, thermochromic perovskite microcapsules (TPMs) with dual-variable and quadruple-modal reversible properties are designed and prepared on the original oil-in-fluorine (O/F) emulsion system. The TPMs respond to the orthogonal variations of external UV and thermal stimuli in four reversible switchable modes and exhibit excellent thermal, air, and water stability due to the protection of perovskites by the core–shell structure. Benefiting from the high-density information storage TPMs, multiple information encryptions and decryptions are demonstrated. Moreover, a set of devices are assembled for a multilevel information encryption system. By taking advantage of TPMs as a “private key” for decryption, the signal can be identified as the corresponding binary ASCII code and converted to the real message. The results demonstrate a breakthrough in high-density information storage materials as well as a multilevel information encryption system based on switchable quadruple-modal TPMs.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Wenmin Yin,Long Wu,Fan Ding,Qin Li,Pan Wang,Jinjie Li,Zhicheng Lu,Heyou Han
To circumvent the limitations of natural antibodies, receptor, or enzyme, molecular imprinting technique has received intensive attention in analytical methods Herein, based on surface enhanced Raman scattering (SERS) molecularly imprinted polymer (SERS-MIP), a SERS-MIP sensor has been developed for the sensitive and selective detection of bisphenol A (BPA). To construct the BPA sensor, raspberry-type SiO 2 @Ag nanoparticles (SiO 2 @Ag NPs) were prepared to act as supporting substrate, and BPA was adopted as template molecule, tetraethyl orthosilicate (TEOS) as functional monomer and 3-aminopropyltriethoxysilane (APTES) as cross-linker. Due to the strong plasma resonance character of Ag NPs, the SERS-MIP sensor showed good sensitivity in the detection of BPA. The core-shell and satellite-like structure of the SiO 2 @Ag composites could provide a large surface area for BPA recognition by molecular binding domains. In addition, the sensor could prevent interferences such as 4,4′-(Hexafluoroisopropylidene) diphenol (BPAF) and 4,4′-Dihydroxybiphenyl (DOD). Moreover, the real water samples were tested to verify the reliability and feasibility of the method. Under the optimal conditions, the proposed method behaved good analytical performance to BPA with a wide linear range from 1.75 × 10 −11 to 1.75 × 10 −6 M and a detection limit of 1.46 × 10 −11 M.
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JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Kuibo Zhang,Shoutao Gong,Baolin Zhao,Yanxiang Liu,Naeem Akhtar Qaisrani,Lingdong Li,Fengxiang Zhang,Gaohong He
Inadequate hydroxide conductivity of anion exchange membrane (AEM) is one of the obstacles restricting practical application of anion exchange membrane fuel cell. In this work, we report the design, fabrication and properties of AEMs based on bent-twisted non-coplanar block copolymer . The bent-twisted polymer backbone creates high free volume size so that hydroxide ion transport is facilitated. The free-volume effect can also facilitate microphase separation due to enhanced chain segment motion. With the free-volume holes working synergistically with microphase-separation enabled ion channels, the membrane showed a high conductivity (35 mS cm −1 at room temperature) at a relatively low ion exchange capacity (IEC, 1.25 meq g −1 ); it also exhibited a good dimension stability, the swelling ratio being 4.7% at room temperature and kept virtually unchanged with temperature because of relatively low IEC. A H 2 /O 2 fuel cell employing the fabricated AEM yielded a high power density (262 mW cm −2 at 50 °C). Our work opens up a new route to fabrication of highly conductive AEM with relatively low IEC.
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TALANTA
·
2018
·
IF 4.244
Lei Chen,Yanting He,Zhixian Lei,Chenling Gao,Qing Xie,Ping Tong,Zian Lin
Core-shell structured magnetic covalent organic framework (Fe 3 O 4 @COF) nanocomposites were synthesized via a facile approach at room temperature and explored as an absorbent for magnetic solid-phase extraction (MSPE) of bisphenols (BPs) from human serum sample. The as-prepared Fe 3 O 4 @COF nanocomposites with core-shell structure possessed high specific surface area (181.36 m 2 /g), uniform mesoporous size (~ 3.6 nm), high saturation magnetization (42.7 emu/g), and excellent thermal and chemical stability, rendering it as an ideal adsorbent with high adsorption efficiency and size selectivity. The experimental parameters influencing extraction efficiency, including adsorbent dosage, extraction time, pH and ion strength, desorption solvent and time, were investigated in detail. Taking these advantages together, a simple, fast, effective and sensitive method that MPSE followed by HPLC-MS, was proposed to detect five BPs, which exhibited good linearity (r > 0.9982) within the concentration ranges of 0.1–50 μg/L. Moreover, the low detection limits (1.0–78.1 ng/L), signal-to-noise ratio (S/N = 3), the high enrichment factors (56–95 fold), and good recoveries (93.0–107.8%) with relative standard deviations (RSDs) less than 3.4% for inter-day and 6.9% for intra-day were achieved. The developed method was also successfully applied to the analysis of trace BPs in human serum sample, which demonstrated the most promising potential of the Fe 3 O 4 @COF nanocomposites as good adsorbent in sample pretreatment.
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JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Ling Li,Chen Xiao Lin,Xiu Qin Wang,Qian Yang,Qiu Gen Zhang,Ai Mei Zhu,Qing Lin Liu
Poly(ether ketone)s bearing multication side chains are synthesized via nucleophilic polycondensation , demethylation and the Williamson reaction to prepare high performance anion exchange membranes (AEMs). The introduction of multication side chains is found to promote the formation of hydrophilic/hydrophobic phase segregated morphology, as confirmed by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). The TQAPEK-0.5 membrane with ionic exchange capacity (IEC) of 1.94 meq g −1 shows the highest hydroxide conductivity of 132.8 mS cm −1 at 80 °C. The first cationic group on the side chain is linked to the backbone via hexyleneoxy groups to render the AEM a good alkaline stability. As a result, TQAPEK-0.5 has only a 22.4% decrease in the conductivity after immersed in a 2 M aqueous KOH solution at 60 °C for 600 h. Besides, the peak power density of a single cell using the TQAPEK-0.5 membrane is observed to be 206 mW cm −2 at a current density of 400 mA cm −2 . Furthermore, the as-prepared AEMs also exhibit good mechanical property and thermal stability, and hold promise for application in fuel cells.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
En Ning Hu,Chen Xiao Lin,Fang Hua Liu,Xiu Qin Wang,Qiu Gen Zhang,Ai Mei Zhu,Qing Lin Liu
To resolve the excessive swelling and undesirable alkaline stability of densely functionalized type anion exchange membranes (AEMs) and to obtain high performance AEMs, quaternary ammonium-functionalized poly(arylene ether nitrile) (QPAEN) AEMs with dense flexible ionic side chain are prepared via nucleophilic substitution polycondensation , demethylation reaction and Williamson reaction. The densely pendent flexible long side chains with QA groups at the end provide a high conductivity and the introduced strong polar nitrile groups result in lower water uptake, excellent dimensional stability and strong alkali resistance of the AEMs. The QPAEN membrane with IEC of 1.78 meq g −1 exhibits the highest hydroxide conductivity of 116.0 mS cm −1 at 80 °C. The high conductivity is attributed to the well-developed hydrophilic/hydrophobic phase separated morphology that constructs efficient ion conducting pathways in the membranes. High retention of hydroxide conductivity (80.2%) and ionic exchange capacity (IEC) (86.0%) was observed for the QPAEN-0.4 membrane in the degradation test in a 2 M aqueous KOH solution for 480 h. Moreover, the single cell performance of the as-prepared AEMs was greatly enhanced and a high peak power density of 251.3 mW cm −2 at 60 °C was observed.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Juan Wang,Xiangsheng Hong,Wang Liu,Le Zhang,Saihong Yan,Zhitong Li,Jinmiao Zha
As substitutes for bisphenol A (BPA), bisphenol analogs (BPs) have raised concerns due to their frequent environmental detection and unclear safety. Here, the cytotoxicity, endocrine disruption, neurotoxicity, aryl hydrocarbon receptor (AhR) activity, and genotoxicity of nine BPs and BPA were evaluated in three types of cell lines. Over half of the tested BPs exhibited greater cytotoxicity than BPA, with IC50 values showing a linear correlation with Log Kow (R²=0.69). All tested BPs exhibited at least one endocrine-disrupting effect, notably estrogenic, which was observable even at 0.01–0.1 μM. Importantly, BPAF and BPAP exposure had widespread endocrine-suppressing effects. Moreover, all BPs (except BPP) and BPA increased SH-SY5Y cells apoptosis at 1–10 μM. Only BPF and BPP significantly increased 7-ethoxyresorufin-O-deethylase levels, highlighting their notable effects on AhR activity. BPAF significantly induced DNA damage at 1.25 μM, whereas BPA, BPF, and BPP induced damage at 20, 25, and 25 μM, respectively. Finally, ToxPi, a weighted scoring system, was used to rank the comprehensive toxicity of BPs, with 7 of 9 BPs showing higher scores than BPA. Collectively, BPs generally exhibited stronger comprehensive toxicity compared with BPA, emphasizing the urgent need for further research to confirm their potential health implications.
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CHEMOSPHERE
·
2024
·
IF 8.1
Jinbo Song,Qian Meng,Hongyu Song,Xiaoming Ni,Hao Zhou,Yang Liu,Jingjing Zhan,Xianliang Yi
Tire wear particles (TWPs) are considered an important component of microplastic pollution in the marine environment and occur together with a variety of aquatic pollutants, including frequently detected bisphenols. The adverse effects of TWPs or bisphenols on aquatic organisms have been widely reported. However, the combined toxicity of TWPs and bisphenols is still unknown. In this study, the combined toxicity of both pristine (p-) and aged TWPs (a-TWPs) and four bisphenols ((bisphenol A (BPA), bisphenol F (BPF), bisphenol S (BPS), and bisphenol AF (BPAF)) to Tigriopus japonicus was evaluated. TWPs increased the toxicity of BPA and BPF but decreased the toxicity of BPAF. For BPS, there was synergistic toxic effect in the presence of p -TWPs, but slightly antagonistic effect was observed in the presence of a-TWPs. This adsorption of BPAF by TWPs resulted in a reduction of its toxicity to the copepod . A-TWPs could release more Zn than p -TWPs, and the released Zn contributed to the synergistic effect of TWPs and BPA or BPF. The aggregation formed by TWPs in certain sizes (e.g., 90–110 μm) could cause intestinal damage and lipid peroxidation in T. japonicus . The synergistic effect of p -TWPs and BPS might be due to the aggregation size of the binary mixture. The results of the current study will be important to understand the combined toxic effect of TWPs and bisphenols and the potential toxic mechanisms of the binary mixture.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Shu-Ting Cheng,Jin-Yu Qiao,Hong-Ming Zhang,Xiao-Fang Shen,Yue-Hong Pang
Bisphenols (BPs) can migrate from packaging materials into foods, resulting in potentially harmful residues. For example, accumulation of BPs is associated with endocrine disorders. Owing to matrix effects, development of an effective and eco-friendly sample pretreatment would be helpful for BPs detection in beverages packed in plastic containers. In this work, an extraction bar, composed of hollow fiber (HF) functionalized with covalent organic frameworks (COF@Tp-NDA) and 1-ocanol, was prepared for extraction of five BPs simultaneously. The synergistic effect of COF@Tp-NDA and 1-octanol improved the extraction efficiency of BPs from milk-based beverage, juice, and tea beverage. Under optimal conditions, limits of detection ranged from 0.10 to 2.00 ng mL −1 (R 2 ≥ 0.9974) and recoveries ranged from 70.1 % to 106.8 %. This method has the potential to enrich BPs, supporting their accurate determination in complex beverages.
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