PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2026
·
IF 7.9
Yanyan CHEN,Yiming LI,Lei FANG,Wei BAO,Kuanjun FANG
This study presents a dual‑scale engineering strategy combining microscale fiber modulation with gradient assembly to overcome the efficiency‑resistance trade‑off in air filters. PA6/PS composite membranes were fabricated via solution blow spinning by embedding three different diameters of PS microspheres into PA6 nanofibers. Larger microspheres induced fiber refinement and a unique “smaller‑pore, higher‑porosity” microstructure, reducing pressure drop while enhancing filtration efficiency. Assembling these tailored layers into a large‑to‑small pore gradient (LMS PA6/PS gradient membrane) enabled sequential coarse‑to‑fine filtration. The optimized membrane achieved higher filtration efficiency (99.98 ± 0.016%) and lower pressure drop (130 ± 1 Pa), delivered a quality factor of 0.067 Pa −1 , which is superior to the homogeneous membrane and N95–8210 respirator, and had an excellent moisture vapor transmission rate of 4715.19 ± 132.45 g/(m 2 ·24 h). Moreover, the LMS membrane showed the slower pressure drop increase during continuous loading compared with 3 M N95–8210, confirming its size‑classified capture mechanism and extended service life. From an integrated pollution control perspective, the prolonged service life reduces material waste, and the spent membrane can be recycled via solvent-based recovery methods, avoiding secondary pollution from direct incineration, offering a viable solution for reducing personal exposure to hazardous particulate matter.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 8
·571
·
IF 5.4
Sun Juan,Nie Zheng,Wu Fangjun,Lai Fujie,Chen Shaoyang,Wang Yang,Jiang Yong
A highly sensitive fluorescent lateral flow immunoassay (LFIA) was developed for SARS‑CoV‑2 IgG detection. Polystyrene (PS) microspheres were synthesized via emulsion polymerization, doped with dipyridamole (Dip), and coated with a protective silica (SiO 2 ) shell through a sol–gel process. After amine functionalization, the SARS‑CoV‑2 nucleocapsid (N) protein was covalently immobilized onto the microsphere surface using EDC/NHS chemistry, yielding PS@Dip@SiO 2 –N fluorescent probes. The LFIA strip enabled one‑step detection within 15 min. Under optimized conditions (N protein conjugation concentration of 40 µg/mL), the strip showed excellent specificity with no cross‑reactivity against other human coronaviruses (NL63, OC43, 229E). Quantitative determination based on the T/C grayscale ratio fitted the Hill equation (R² = 0.9782). The detection limit for SARS‑CoV‑2 IgG was 10 ng/mL, approximately two orders of magnitude lower than that of a commercial colloidal gold‑based LFIA strip. This platform provides a rapid, sensitive, and low‑cost solution for point‑of‑care serological screening of COVID‑19. Graphical abstract
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Junjie Yang,Jihong Sun,Tao Yu,Jintong Yao,Kang Wei,Zhen Jiang,Mingjian Fang,Weilong Li
Hydrogel crosslinking varies in properties and stability, with many physiochemical crosslinkers boosting hydrogel performance but raising issues about biotoxicity, sourcing, and compatibility. Cordyceps polysaccharide, from the rare Chinese herb cordyceps, offers antioxidant and anti-cancer benefits without biological toxicity. This study developed a new hydrogel actuating membrane by crosslinking cordyceps polysaccharide with sodium alginate. Hydrogel Bio-mimetic Polymer Actuators (HBPA) were then assembled using non-metallic electrode membranes and tested for electrical actuation properties. A mechanoelectric coupling model was used to study the electrically actuated deflection system of HBPA. Results showed that a crosslinking ratio of 3:5 increased the peak output force density of HBPA to 21.95 mN/g. The actuation speed increased by 8.05 % compared to the basement membrane, while the duty ratio dropped by 80.8 %, significantly enhancing the tremor index. Tremor frequency and amplitude decreased by 43.52 % and 64.88 %, respectively. Electrochemically, specific capacitance grew 3.9 times, resistance fell by 21.7 %, and specific energy rose by 102.42 %. The actuating membrane featured a dense, uniform structure with evenly distributed pores and well-coordinated active groups at the optimal crosslinking ratio. At 4 V, HBPA demonstrated excellent electrical actuation and significant rebound at 0.1 Hz. Moreover, the mechanoelectric coupling model effectively applied to electroactive polymer materials.
研究领域:
材料科学
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生物医学工程
·
高分子化学
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COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Jiang Wang,Qi Tang,Xiaoming Ren,Yingkui Yang,Qunchao Zhang,Weiwei Lei,Zhi Li,Tao Jiang,Dean Shi
Selectively dispersed functional nanoparticles within one phase or at the phase interface in polymer composites with co-continuous morphology is the most effective way to reduce the percolation threshold of the nanoparticles . In this study, amino-modified nanosilica particles (mSiO 2 ) have been selectively localized at the interface of the PS/PA6/mSiO 2 composites with co-continuous morphology via reactive extrusion . Styrene maleic anhydride (SMA) with different maleic anhydride (MAH) contents is used as compatibilizers . Nanosilica particles can be induced to the interface of PS and PA6 phases by SMA macromolecules through the chemical reaction between the amino groups on nanosilica particle surfaces and MAH groups in SMA macromolecules. The MAH content of SMA macromolecules has large effect on the distribution of nanosilica particles. When nanosilica particles are premixed with SMA2, whose MAH content is 23 wt% and more compatible to PA6 phase, only ∼26% of the nanosilica particles can be induced to the interface; However, when nanosilica particles are premixed with SMA3, which contains only 8 wt% of MAH and is more compatible to PS phase, nearly 95% of the nanosilica particles can be located at the interface. This work creates a new facile approach to prepare polymer composites where nanoparticles are selectively distributed at the phase interface.
研究领域:
材料科学
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高分子科学
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纳米复合材料
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反应加工
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hao Cheng,Yi Wen,Chao Huang,Ping Wang,Chengyou Sun,Chongling Feng,Jialu Xu,Li Du,Ting Yan,Min Cheng
In this work, molybdenum carbide (Mo 2 C) was innovatively introduced into the trivalent iron/sodium persulfate (Fe 3+ /PS) based Fenton-like process for tetracycline hydrochloride (TC) degradation, and its co-catalytic performance was compared with three typical metal sulfides (tungsten disulfide (WS 2 ), molybdenum sulfide (MoS 2 ), and cobalt disulfide (CoS 2 )). Results indicated that the Mo 2 C/Fe 3+ /PS system had significantly higher rates of TC removal (0.3054 min −1 ) and Fe(III) reduction (1.6622 min −1 ) compared to the three metal sulfide systems. The Mo 2 C/Fe 3+ /PS system could be adapted to a wide pH range (2.7–8.5), and Mo 2 C still had excellent co-catalytic performance after five cycles. X-ray photoelectron spectroscopy demonstrated the presence of Mo(II) and Mo(IV) on the surface of Mo 2 C, which can directly reduce Fe 3+ , thus significantly improving the reaction efficiency. Quenching and Electron Paramagnetic Resonance experiments demonstrated that four oxidative species were involved in Mo 2 C/Fe 3+ /PS system. The continuous reduction of Fe(III) by Mo 2 C contributed to the significant enhancement of PS activation in the Mo 2 C/Fe 3+ /PS system. Moreover, the presence of water matrix such as chloride ions (Cl − ), nitrate ions (NO 3 − ), and humic acid (HA) had almost no significant effect on TC degradation, indicating that the Mo 2 C/Fe 3+ /PS system can work effectively under complex conditions. In summary, this study provides a novel and efficient strategy to accelerate the Fe(III)/Fe(II) cycle and activate PS for TC degradation, which is expected to advance the development of the Fenton-like process.
研究领域:
环境科学
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化学工程
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材料科学
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RSC Advances
·
2023
·Vol. 13
·期 17
·11728-11732
·
IF 3.9
Yanqiang Tong,Weihua Zou,Delin Sun,Zhangheng Wang
Thermochromic wood is an important research direction for wood modification in recent years, and a red poplar-based thermochromic composite (R-PTC) had been prepared in our previous study by compositing a mixture of phase change reagents (tetradecyl ester: C28H56O2 and methyl red: C15H15N3O2) and full poplar wood. In order to improve the heating storage ability of R-PTC and encapsulating phase change reagents to prevent leakage, a new R-PTC composite (PS-R-PTC) was prepared by encapsulated R-PTC with polyethylene glycol 400 (PEG400)–SiO2 in this work. Compared to the original R-PTC samples, the cell walls of PS-R-PTC were not significantly changed by the SiO2 film and we also found that PS-R-PTC with PEG400 (90%)–silica solutions (10%) mixture had better heat storage performance and PS-R-PTC (90%) has better enthalpy change value (R-PTC: 43.01 J g−1; PS-R-PTC (90%): 71.82 J g−1). The PS-R-PTC can show the function of thermal energy storage, which is used in wooden buildings and can be a feasible insulating material for reducing thermal energy losses and hence reducing energy usage. In PS-R-PTC, SiO2 combines with the –OH of the R-PTC and the –OH of PEG400 (HO(CH2CH2O)nH), and these –OH lose hydrogen ions too.
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Foods
·
2022
·Vol. 11
·期 13
·1843
·
IF 5.561
Lanlan Wei,Yanan Chen,Dongliang Shao,Jingjun Li
In this study, a packed-fiber solid-phase extraction (PFSPE)-based method was developed to simultaneously detect nine quinolones, including enrofloxacin (ENR), ciprofloxacin (CIP), ofloxacin (OFL), pefloxacin (PEF), lomefloxacin (LOM), norfloxacin (NOR), sarafloxacin (SAR), danofloxacin (DAN), and difloxacin (DIF), in pure milk, using high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS/MS). Polystyrene (PS) and polyacrylonitrile (PAN) were combined to form PS-PAN composite nanofibers through electrospinning. The nanofibers were used to prepare the home-made extraction columns, and the process was optimized and validated using blank pure milk. The analytical method showed high accuracy, and the recoveries were 88.68–97.63%. Intra-day and inter-day relative standard deviations were in the ranges of 1.11–6.77% and 2.26–7.17%, respectively. In addition, the developed method showed good linearity (R2≥ 0.995) and low method quantification limits for the nine quinolones (between 1.0–100 ng/mL) for all samples studied. The nine quinolones in the complex matrix were directly extracted using 4.0 mg of PS-PAN composite nanofibers as a sorbent and completely eluted in 100 μL elution solvent. Therefore, the developed PFSPE-HPLC-MS/MS is a sensitive and cost-effective technique that can effectively detect and control nine quinolones in dairy products.Keywords:polystyrene-polyacrylonitrile nanofibers;quinolones;packed-fiber solid-phase extraction;HPLC-MS/MS;pure liquid milk
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yuling Shi,Qing Liu,Qianqian Pan,Danlong Yang,Tao Wang
Polymer@metal core-shell microspheres are widely used in anisotropic conductive adhesives (ACAs). Styrene-divinylbenzene copolymer (PS-DVB) copper core-shell microspheres (PS-DVB@Cu) with high conductivity and anti-oxidation performance were successfully prepared by combining copper nanoparticles (Cu NPs) and electroless plating copper. The Cu NPs served as catalytic seeds, substituting noble metals to promote electroless deposition . Using environmentally benign ammonia borane as the reductant to replace toxic formaldehyde, the dense copper film was deposited on the surface of PS-DVB microspheres. The thickness of the Cu layer and bulk electrical resistivity of PS-DVB@Cu were tuned by controlling the concentration of the reducing agent. The minimum resistivity of PS-DVB@Cu was 3.27 × 10 −6 Ω·m and merely slightly changed in the air for two months. The prepared PS-DVB@Cu-based ACAs could be effectively applied to anisotropic conductive connections in small-scale circuits with satisfactory anisotropic conductivity.
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COLLOID AND POLYMER SCIENCE
·
2017
·Vol. 295
·期 5
·817-826
·
IF 1.723
Nie Xiaobo,Xu Yajun,Zhang Ying
Well-defined polymer/inorganic nanoparticle (NP) hybrids are of vital importance to the development of nanomaterials with desired optical, electric, magnetic, and many other properties. We demonstrate the efficient incorporation of n -trioctylphosphine oxide (TOPO)-coated CdSe quantum dots (QDs) into polystyrene- b -polyacrylic acid (PS- b -PAA) colloids by a “solution phase self-assembly” approach. Driven by the hydrophobic interactions, the CdSe QDs are homogeneously encapsulated in the hybrid colloids. The sizes of the hybrid colloids with different structures, i.e., simple spherical micelles and big compound micelles, are tuned from 45 to 126 nm by varying the THF content in the cosolvents of THF and DMF, as well as changing the content or addition rate of selective solvent (water). The PS- b -PAA@CdSe QD hybrid colloids, which show brightly green fluorescence, can be endocytosed into biological cells and be released from the cells evolutionally, indicating their potential applications in biological imaging, labeling, and sensing, among others.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Shuman Li,Ming Han,Hong-Guo Liu
Amphiphilic block copolymers can self-assemble into various aggregates in which functional inorganic nanoparticles and organic chromophores can be incorporated. A variety of fabrication methods have been developed. In this work, the liquid/liquid interface mass transfer-assisted self-assembly method was extended to fabricate composite organized structure of polystyrene-b-polyacrylic acid (PS-b-PAA) with small organic molecules, such as diamines, dopamine and dyes. It was found that long uniform nanowires , hollow spheres and foams were generated when using these organic molecules under different conditions, which correspond to worm-like micelles , vesicles and aggregates of microcapsules, respectively. The length of the nanowires reaches to several tens of micrometers. The influence of the molecular structure of the organic molecules, especially the diamines was investigated and discussed, and the formation mechanism of these aggregates was analyzed. This method may be developed to a facile and useful approach to fabricate functional composite structure of block copolymers and small molecules.
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Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 22
·4221-4232
·
IF 4.543
Yeying Wang,Xijian Liu,Guoying Deng,Qian Wang,Lijuan Zhang,Qiugen Wang,Jie Lu
In this work, multifunctional polystyrene@chitosan@gold nanoparticles–Fe3O4 nanoparticles–folic acid/indocyanine green (PS@CS@Au–Fe3O4–FA/ICG) nanocomposites that can integrate diagnosis and therapy into one nanoplatform was fabricated. The constructed PS@CS@Au–Fe3O4–FA/ICG nanocomposites possessed excellent computed tomography, magnetic resonance and fluorescence imaging performances which could be used to diagnose tumor and monitor the nanocomposites’ localization in vivo. Moreover, PS@CS@Au–Fe3O4–FA/ICG nanocomposites can be delivered in a targeted manner to cancer cells by folic acid in a receptor-mediated way, and tumor growth could be efficiently inhibited, even completely ablated, under NIR irradiation. That is, the constructed PS@CS@Au–Fe3O4–FA/ICG nanocomposites had great potential for computed tomography, magnetic resonance and fluorescence imaging performances, which could be used to diagnose tumors and to monitor local therapy and fluorescence imaging-guided targeted therapy of cancer cells using nanocomposites.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Wensong Ma,Meina Xu,Ligang Lin,Qi Cheng,Zitian Liu,Jing Yang,Fengling Tang,Qiying Wang,Hao Wu,Huiyang Shang,Xinyang Li,Xu Yang,Hongchao Li,Zining Guo
Superhydrophobic materials have a wide range of applications in the fields of anticorrosion, anti-dust, anti-ice and anti-fouling due to their self-cleaning, anti-wetting and anti-bacterial properties. However, there are problems in the preparation process, such as cumbersome processes, inconsistent properties of the prepared hydrophobic surfaces, and environmental pollution by fluoropolymers. Therefore, it is especially critical to develop a simple method to prepare green and efficient superhydrophobic surfaces. Here, a simple template method is used to prepare superhydrophobic surfaces. The Polystyrene (PS) honeycomb patterned film was used as a template, and the microstructure inside the pores of the PS film was changed by filling silica particles inside the template. Reproduction of the surface microstructure of PS films using polydimethylsiloxane (PDMS). The shape and size of the template structure are adjusted to regulate the surface microstructure, which in turn achieves the control of the overall hydrophobicity. The transition from PDMS hydrophobicity to superhydrophobicity was achieved by changing the structure of the PS film surface. The PDMS@PS-SiO 2 film achieved a water contact angle of 153°, an increase of 48° compared to the original film. Tested at different temperatures and pH, PDMS@PS-SiO 2 film has good stability performance. Immersing the film in pollutants still maintains its own cleaning properties and is not easily contaminated for long-term use. The morphology of the film surface was observed using electron microscopy to demonstrate the successful preparation of the film as well as to explore the reason for the variation of the hydrophobic performance. In addition, using PDMS@PS-SiO 2 film as the substrate of the hydrophobic film, the bionic water-collecting film was prepared with a water-collecting performance of 20.12 ± 0.15 mg min −1 cm −2 . The reuse of mist was achieved. This method provides a new idea for the preparation of superhydrophobic surfaces and solving the problem of water shortage.
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