Polymers
·
2020
·Vol. 12
·期 3
·574
·
IF 3.426
Zhicai Zhu,Liqin Yao,Qilong Zhang,Hui Yang
In this paper, homogeneous polystyrene (PS) microspheres with controllable sizes of 40 nm, 80 nm, and 120 nm were synthesized by controlling the temperature of solvothermal method. In order to explore the effect of PS microspheres on dielectric-hydrophobic properties of the composite films, the composite films containing polystyrene, Polydimethylsiloxane, and P(VDF-TrFE) with high dielectric and hydrophobicity were successfully prepared by a simple and feasible solution blending method. The dielectric constant and hydrophobicity of composite films were boosted by increasing the mass fraction of PS content and decreasing the size of PS due to the enhanced interfacial polarization and the uniform surface micro bulge structure. Meanwhile, the composite films maintain a low loss tangent. Typically, the dielectric constant with 5 wt.% 40 nm PS reached to 29 at 100Hz, which is 4 times that of PDMS/P(VDF-TrFE) (mass ratio: 2/3). Otherwise, the largest the contact angle of 126° in the same composition was remarkably larger than the pure PDMS/P(VDF-TrFE) (110°). These improved properties have more potential applications in the electric wetting devices.Keywords:dielectric properties;hydrophobicity;micro bulge structure;interfacial polarization
研究领域:
材料科学
·
物理学
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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Yu Zhou,Ning Zhang,Xiang Zhou,Yubing Hu,Gazi Hao,Xiaodong Li,Wei Jiang
With the increase of oil spill accidents and discharge of oily wastewater, a novel oil adsorption material with superhydrophobicity and reusability is desired. To our knowledge, low surface energy and surface roughness are two key factors for superhydrophobic materials. Thus, a recyclable superhydrophobic PU@Fe3O4@PS sponge was fabricated through ultrasonic dip-coating and self-initiated photografting and photopolymerization (SIPGP) to attach Fe3O4 nanoparticles and polystyrene (PS) brushes onto the skeleton surface of the polyurethane (PU) sponge, constructing superhydrophobic micronano hierarchical surface. The preparation process was facile and simple, which was accomplished without initiator under simple UV irradiation. This as-prepared sponge selectively removed various oily contaminants from water with high adsorption capacity, and its magnetic property and elasticity endowed it with good reusability. When it was connected with a negative pressure system, continuous oil–water separation was achieved. Therefore, it is really a potential adsorbent for practical application in oil-polluted water treatment.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Guohao He,Mingming Li,Xin Li,Qimeng Wang,Zhiying Xie,Yali Xue,Kai Wang,Jun Yu,Gengzhi Sun,Haizhou Yu,Xiaoyan Qiu
Isoporous membranes from a process coupling the self-assembly of block copolymer with nonsolvent-induced phase separation (SNIPS) could enhance both the permeability and selectivity due to the high pore density and uniform pore sizes. Whereas, it is difficult to precipitate PAA based block copolymer in nonsolvent to make membranes because PAA blocks are hydrophilic. Herein, isoporous PS 678 - b -PAA 180 membranes were well prepared after reinforced by multiwalled carbon nanotubes decorated with silver nanoparticles (MWCNT-Ag). Such composite membranes bear not only regular channels with an effective pore diameter of ca. 18.85 nm, but also high water permeance of 1770.35 L bar −1 m −2 h −1 . With the participation of carbon nanotubes, the PS- b -PAA isoporous membrane exhibits excellent photothermal conversion properties, which endows the membrane with an efficiency of ca. 10.6 kg m −2 h −1 for light energy-driven seawater desalination and wastewater purification. Moreover, the silver particle-decorated CNTs enable the membrane to be antibacterial, which ensures reliability in long-term application.
研究领域:
材料科学
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环境工程
·
纳米技术
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Yan Cao,Senlin Tian,Yingxue Geng,Linfeng Zhang,Qun Zhao,Jie Chen,Yingjie Li,Xuewei Hu,Jianhong Huang,Ping Ning
Copper oxide nanoparticles (CuO NPs) can adversely affect lung health possibly by inducing oxidative damage through the release of copper ions. However, the migration and transformation processes of CuO NPs in lung lining fluid is still unclear, and there are still conflicting reports of redox reactions involving copper ions. To address this, we examined the release of copper ions from CuO NPs in simulated lung fluid supplemented with pulmonary surfactant (PS), and further analyzed the mechanisms of PS-CuO NPs interactions and the health hazards. The results showed that the phospholipid of PS was adsorbed on the particle surface, which not only induced aggregation of the particles but also provided a reaction environment for the interaction of PS with CuO NPs. PS was able to promote the release of ions from CuO NPs, of which the protein was a key component. Lipid peroxidation, protein destabilization , and disruption of the interfacial chemistry also occurred in the PS-CuO NPs interactions, during which copper ions were present only as divalent cations. Meanwhile, the contribution of the particle surface cannot be neglected in the oxidative damage to the lung caused by CuO NPs. Through reacting with biomolecules, CuO NPs accomplished ion release and induced oxidative damage associated with PS. This research was the first to reveal the mechanism of CuO NPs releasing copper ions and inducing lipid oxidative damage in the presence of PS, which provides a new idea of transition metal-induced health risk in human body.
研究领域:
毒理学
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纳米生物学
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环境健康科学
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DOI
PubMed
高影响因子
JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES
·
2016
·
IF 0.669
Qing Wang,Li Xu,Ying-wen Xue
The present study described the preparation and application of a reversed-phase/zwitterionic/hydrophilic interaction liquid chromatography stationary phase, named as SIL-PS. The SIL-PS was prepared through a four-step reaction, chemical bonding, nucleophilic addition, SN1 substitution, and sulfonation on the silica matrix. It was featured with C12 alkyl chain, quaternary ammonium, tertiary amine, and sulfonate groups. After SIL-PS was packed into the stainless steel column (150 × 2.1 mm i.d.), chromatographic parameters, including acetonitrile content, pH, and ionic strength of the mobile phase, and the column temperature, were systematically investigated to study the retention mechanism. Electrostatic adsorptive/repulsive, partition, and hydrogen-bonding interactions were demonstrated to contribute to the retention. The stability of the SIL-PS was satisfactory, with relative standard deviations of retention factors of 1.93, 2.08, and 1.90% for loxoprofen, adenosine, and liquiritin, respectively. Additionally, to investigate the separation selectivity, the non-steroidal anti-inflammatory drugs, nucleobases/nucleotides, and alkaloids/glycosides were separated; the HPLC fingerprinting of the Cortex phellodendri extract was also conducted, and the separation performance was superior to that of the C18 column in terms of peak shape, resolution, and analytical time. The results revealed that the prepared SIL-PS possessed multifunctionalities for multiretention and could be promising for complicated samples.
研究领域:
分析化学
·
色谱学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Nan Lyu,Jiaheng Wang,Hongjiang Shen,Zhiyong Bao,Yong Zhang,Yucheng Wu
Graphene quantum dots interfacial-decorated hierarchical Ni/PS core/shell nanocapsules were successfully synthesized by three-step liquid chemical method . The morphologies and electromagnetic properties were carefully studied in order to investigate the dielectric shells modulated tunable microwave absorption in 1–18 GHz (L–Ku), based on the anisotropic nanoflakes assembled magnetic core. With different GQDs/PS ratio in the shells, the dielectric attenuation can be flexibly tuned by the interfacial polarizations deriving from the density modulation of interfacial-decorated polar GQDs in the nonpolar insulative PS matrix. The calculated impedance matching maps, microwave absorption efficiencies ( R E ), reflection loss ( RL ) and simulations illustrated the coincident effect with an obvious rise-fall performance in X–Ku band. The tunable RL value in fixed frequency of X band and shifting absorption peaks from Ku to X band were achieved in different absorber thickness with the minimum RL below −42.5 dB and the effective absorption bandwidth ( RL < −10 dB) above 2.04 GHz.
研究领域:
材料科学
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电磁学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yiping Chen,Zihao Chen,Jie Wei
In this study, we fabricated a kind of tri-band responsive photonic crystals (TRPCs) for real-time information writing and coding. First, core-interlayer-shell nanoparticles (CISNPs) were synthesized via semi-continuous emulsion polymerization, with photobase generators grafted onto the shell of the CISNPs. The photonic crystals were obtained by a rapid method, spraying the CISNPs solution onto the substrate. Fluorescamine (FA) and diacetylene (DA) solutions were further sprayed onto the photonic crystal surface to obtain TRPCs, respectively. The TRPCs can produce color changes under the light of UVC, NIR, and UVA. According to the tri-band responsive behaviors, the TRPCs were used for real-time information writing and coding. By covering different masks, DA and FA solutions were sprayed on the assembled photonic crystal to write information. Then the written information was displayed after being exposed to the UVC, NIR, and UVA light. Furthermore, photonic crystals with different structural colors assembled by CISNPs with different particle sizes were coded according to various structural colors and fluorescence colors. In this paper, two methods of fabricating photo-responsive photonic crystals were combined, that is, modifying the nanoparticle assembled to form photonic crystals and adding photo-responsive substances into the photonic band gap, to increase the response density of the photonic crystals, which can be applied in more complex anti-counterfeiting and coding.
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高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Yuxia Jin,Qing Zhu,Weibing Zhong,Kelu Yan,Dong Wang
Despite much progress in solvent-sensitive actuators, most of the actuators are sensitive to water, ethanol, or acetone with low responsive speed and small curvature. Herein, a simple approach was introduced to fabricate a new solvent-sensitive bilayer actuator consisting of a poly(vinyl alcohol-co-ethylene) (EVOH) nanofibrous membrane and polystyrene (PS) microspheres. The actuator showed superfast and multistimulus responsive ability to organic vapors of toluene, chloroform, THF, and acetone. With solvents stimulation, the difference in swelling degree between the EVOH layer and PS microspheres layer contributed to the asymmetric expansions or contractions of two layers, therefore resulting in the mechanical deformation of the actuator. The flexible and porous EVOH nanofibrous membrane, as well as the spherical PS, could improve the response rate and deformation scale. This bilayer actuator could bend quickly into a multicoil with the curvature of 21.02 cm–1 within 0.15 s in response to toluene vapor, and the bending–unbending process could repeat more than 150 times when the deformation degree was controlled by cross-linking PS microspheres with divinylbenzene. This study will provide an important insight for the development of new solvent-sensitive devices and applications in volatile organic compounds detecting.
研究领域:
材料科学
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化学工程
·
智能材料
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DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Shengchao Chen,Dudu Yang,Longbo Xia,Mei-Ling Liu,Kecheng Guan,Dong Zou,Hideto Matsuyama
Membrane distillation (MD) suffers from challenges in industrial applications because of membrane wetting caused by hydrophobic decay. Although surface modifications such as nanoparticle loading or chemical grafting have been explored, weak interfacial adhesion and functional component detachment persists. This paper presents a novel dissolution-phase separation strategy for fabricating robust poly (vinylidene fluoride) (PVDF)/polystyrene (PS) composite membranes for MD. The hydrophobic PS microspheres and PVDF were dissolved in a PolarClean solvent to prepare a dilute solution. A PVDF base membrane was immersed in this solution and transferred to a water bath for phase separation, wherein the surface of the base membrane was dissolved in the PVDF/PS/PolarClean solution to form new PVDF/PS micro–nanostructures. The PS microspheres were entangled with molecular chains of PVDF and stably formed on the base membrane surface by controlling the solution temperature, immersion time, and concentrations of PVDF and PS in the dilute solution. The newly formed PVDF/PS micro/nanostructures significantly enhanced the antiwetting properties of the membrane. In contrast to conventional modification strategies, this method utilizes inherent hydrophobicity and micro/nanoscale structures of PVDF and PS for reinforcing the hydrophobicity of the resulting membrane, which significantly improves its stability. After 48 h of the MD process, the optimized PVDF/PS membrane exhibited a stable flux of 29.8 kg·m −2 ·h −1 and 23.1 kg·m −2 ·h −1 for 35 and 100 g/L saline water with all salt rejections above 99.9 %. In addition, the membrane demonstrated excellent performance in treating simulated dye wastewater, which maintains a high water flux above 20 kg m −2 h −1 with near-complete dye rejection and 99.9 % salt rejection.
研究领域:
膜科学
·
环境工程
·
材料科学
·
分离技术
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高影响因子
Nanoscale
·
2017
·Vol. 9
·期 35
·12874-12884
·
IF 7.367
Ya-Xuan Zhu,Hao-Ran Jia,Zhan Chen,Fu-Gen Wu
Photodynamic therapy (PDT) has drawn extensive attention as a promising cancer treatment modality. However, most PDT nanoagents suffer from insufficient drug loading capacity, a severe self-quenching effect, premature release of drugs and/or potential toxicity. Herein, we rationally designed an inorganic–organic nanohybrid with high drug loading capacity and superior chemical stability for enhanced PDT. Polyhedral oligomeric silsesquioxane (POSS), an amine-containing cage-shaped building block, was crosslinked with chlorin e6 (Ce6), a carboxyl-containing photosensitizer, via the amine–carboxyl reaction. Polyethylene glycol (PEG) polymers were further modified on the surface of the nanoparticle to improve the aqueous dispersibility and prolong the circulation time of the final nanoconstruct (POSS-Ce6-PEG). The as-prepared POSS-Ce6-PEG has a considerably high loading rate of Ce6 (19.8 wt%) with desirable fluorescence emission and singlet oxygen generation. Besides, in vitro experiments revealed that the nanoagent exhibited enhanced cellular uptake and a preferred intracellular accumulation within mitochondria and the endoplasmic reticulum, resulting in high anticancer efficiency under light irradiation. Furthermore, in vivo imaging-guided PDT was also successfully achieved, showing the effective tumor targeting and ablation ability of POSS-Ce6-PEG. More importantly, the nanoagent possesses negligible dark cytotoxicity and systemic side effects. Therefore, POSS-Ce6-PEG as an eligible PDT theranostic agent holds great potential in clinical applications.
研究领域:
纳米技术
·
癌症治疗
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材料科学
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生物医学工程
·
药剂学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 34
·17671-17676
·
IF 5.968
Wenze Shan,Linfeng Hu,Xin Lin,Min Chen,Limin Wu
This paper presents a simple and effective strategy to construct a UV photodetector based on ZnS hollow-spheres by oil–water interfacial self-assembly of polystyrene (PS)/ZnS colloidal nanospheres followed by annealing treatment. In this approach, PS/ZnS colloidal nanospheres were prepared and then self-assembled into a closely packed PS/ZnS nanofilm at a “hexane–water” interface. By annealing this precursor nanofilm under an optimal condition, a ZnS hollow-sphere nanofilm with a densely packed network structure was obtained. The particle size and morphology of the PS/ZnS colloidal nanospheres and the as-transformed ZnS hollow-spheres were characterized by TEM, HRTEM and SEM. Finally, a UV photodetector was successfully constructed from the as-transformed ZnS hollow-sphere nanofilm.
研究领域:
材料科学
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纳米技术
·
光电材料
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Wenya Chen,Qingyun He,Ziyao He,Qin Wang,Jing Ding,Qiao Huang,Xiaojuan Liang,Zhaoping Chen,Weidong Xiang
In recent years, all-inorganic metal lead halide cesium perovskites (CsPbX3, X = Cl, Br, and I) have shown excellent luminescence performance in the field of wide color gamut backlight displays. However, Pb2+ in CsPbX3 easily leaks because of the unstable structure of CsPbX3, which seriously threatens human health. However, Mn-based metal halides (MHs) have unique environmentally friendly characteristics. In this work, Zn2+-doped Cs3MnBr5 MHs were successfully prepared, which exhibited highly efficient green emissions at 520–522 nm. Moreover, Cs3MnxZn(1–x)Br5 shows excellent stability at room temperature (25 °C) compared with Cs3MnBr5. More excitingly, when Cs3MnxZn(1–x)Br5 was encapsulated in a polystyrene (PS) polymer, Cs3MnxZn(1–x)Br5@PS showed better water, acid, daylight, and blue light stabilities. In addition, the backlight display device was designed based on different green–red ratios and thicknesses of Cs3MnxZn(1–x)Br5@K2SiF6:Mn4+@PS light conversion films, and the color gamut was over 109% of the NTSC 1953 standard, which is better than that of the reported WLED devices based on Mn-based MHs thus far. This work undoubtedly shows that Mn-based MHs have great application potential in wide color gamut backlight displays and provide a practicable route to fabricate nontoxic, low-cost, and high-performance liquid crystal displays.
研究领域:
材料科学
·
光学
·
显示技术
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高影响因子
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