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.
研究领域:
材料科学
·
聚合物化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Muneeb Ahmed,Lisheng Zhong,Fei Li,Rui Sui,Ming Wu,Jinghui Gao
This research investigates the transition from a micropinned to a polymeric alloy structure in crosslinked-polyethylene-polystyrene (XLPE-PS). Incorporating 2 wt% 10 μm PS particles into low-density polyethylene (LDPE) and crosslinking with 2 wt% dicumyl peroxide (DCP) forms XLPE-PS structures. The polymeric alloy structure, formed at 220°C extrusion, contrasts with the micropinned formed at 150°C. Morphological, thermo-structural, chemical, and crystal properties are examined to understand their impact on electrical properties and charge transport mechanisms. Results indicate that the polymeric alloy effectively resolves void/crack issues, whereas the micropinned exhibits phase separation. Both structures exhibit a benzene-crosslinked network, and variations in these structures lead to significant changes in thermo-structural, chemical, and crystalline properties. The polymeric alloy XLPE-PS shifts the polyethylene (PE) hkl crystal planes, confirming phase shift and optimal alloying. The structural alterations reveal deeper traps and higher densities in the polymeric alloy XLPE-PS, leading to significantly improved electrical properties, including reduced DC conductivity by up to 1.3 and 0.7 decades at 30 and 90°C, and increased DC breakdown strength by up to 40.34% and 16.17% at 30 and 90°C, respectively, compared with micropinned XLPE-PS. This research offers insights into stable high-voltage insulation development.
研究领域:
材料科学
·
电气工程
·
高分子化学
✓ 已验证
DOI
高影响因子
CURRENT APPLIED PHYSICS
·
2018
·
IF 2.058
Ling-yan Li,Shuang-lin Li,Yan Shao,Rui Dou,Bo Yin,Ming-bo Yang
In this work, Polyvinylidene Fluoride (PVDF)/polystyrene (PS)/high density polyethylene (HDPE) ternary blends displayed a core-shell structure where HDPE was the core, PS was the shell, and this core-shell system dispersed in PVDF matrix. Here, multiwall carbon nanotubes (MWCNTs) and ferroferric oxide (Fe 3 O 4 ) was incorporated. F-F composites with MWCNTs was in PS shell and Fe 3 O 4 was in PVDF matrix and E-F composites with MWCNTs was in PS shell and Fe 3 O 4 was in HDPE core were fabricated by melt blending. It was indicated that the core-shell morphology between PS and HDPE was well retained with the incorporation of Fe 3 O 4 and MWCNTs. Both the electrical conductivity of F-F and E-F composites were similar without no obvious change with the incorporation of Fe 3 O 4 . Composites with greater than 20 dB shielding effectiveness were easy to obtain. The highest SE we observed was for the F-F composite with 1 vol% Fe 3 O 4 and 1 vol% MWCNTs was 25 dB at 9.5 GHz, and the SE was over 20 dB in the whole measured frequency(X-band). The E-F composites with SE greater than 20 dB in X-band was at 2 vol% Fe 3 O 4 and 1 vol% MWNCTs. Such effective and lightweight nanocomposites were obtained, resulting from the synergetic effect of MWCNTs and Fe 3 O 4 nanoparticles .
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Lihui Xuan,Yin Wang,Can Qu,Yuhui Yan,Wensen Yi,Jingjing Yang,Magdalena Skonieczna,Cuimei Chen,Justyna Miszczyk,Dmitry S. Ivanov,Hesham M.H. Zakaly,Vladimir Markovic,Ruixue Huang
Nanoplastics have been widely studied as environmental pollutants, which can accumulate in the human body through the food chain or direct contact. Research has shown that nanoplastics can affect the immune system and mitochondrial function, but the underlying mechanisms are unclear. Lungs and macrophages have important immune and metabolic functions. This study explored the effects of 100 nm PS-NPs on innate immunity, mitochondrial function, and cellular metabolism-related pathways in lung (BEAS-2B) cells and macrophages (RAW264.7). The results had shown that PS-NPs exposure caused a decrease in mitochondrial membrane potential, intracellular ROS accumulation, and Ca 2+ overload, and activated the cGAS-STING signaling pathway related to innate immunity. These changes had been observed at concentrations of PS-NPs as low as 60 μg/mL, which might have been comparable to environmental levels. Non-target metabolomics and Western Blotting results confirmed that PS-NPs regulated prostaglandin B1 and other metabolites to cause cell damage through the cGAS-STING pathway. Supplementation of prostaglandin B1 alleviated the immune activation and metabolic disturbance caused by PS-NPs exposure. This study identified PS-NPs-induced innate immune activation, mitochondrial dysfunction, and metabolic toxicity pathways, providing new insights into the potential for adverse outcomes of NPs in human life.
研究领域:
环境科学
·
免疫学
·
细胞生物学
·
代谢组学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Ailian Chen,Yang Chen,Xiaobing Zhao,Yayun Wang
For chemical and mechanical polishing/planarization (CMP) applications, the finished surface roughness , polishing efficiency, and defectivity critically depend on the type of abrasive particles and their physical and surface chemical characteristics. Both of core/shell structured inorganic/organic hybrids and porous particles exhibit important potentials in achieving high-efficiency and damage-free CMP. In this work, the polystyrene (PS)-core/mesoporous silica (mSiO 2 )-shell hybrid particles with a comparable shell thickness and tunable core size were synthesized via a modified Stöber process using cetyltrimethylammonium bromide as the template and tetraethyl orthosilicate as the silica precursor. The as-obtained PS/mSiO 2 hybrid particles were characterized by XRD , FT-IR, FESEM , HRTEM , STEM-EDX, HAADF-STEM, DLS, and N 2 sorption-desorption measurements. The mechanical properties (elastic moduli) of PS/mSiO 2 hybrids were investigated via atomic force microscopy (AFM) nano-indentation using Hertz contact model. The effect of the abrasive particle size of PS/mSiO 2 hybrids on CMP performances for oxidized silicon wafers was investigated in terms of root-mean-square ( RMS ) roughness and material removal rate ( MRR ). The PS/mSiO 2 hybrid abrasives presented a reduced roughness and an enhanced MRR with respect to non-porous solid silica abrasives with a comparable particle size. The improved CMP performance might be attributed to the reduction of overall hardness and/or elastic modulus and the improvement of interfacial tribo-chemical wear, resulting from the abundant meso-channels in the silica shells. Furthermore, the RMS roughness and MRR decreased as the PS core size decreased for PS/mSiO 2 hybrids with a comparable mSiO 2 shell thickness. The presented work describes our effort to engineer hybrid abrasives by regulating their polymer core size in order to optimize the CMP performance.
研究领域:
材料科学
·
化学工程
·
表面科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CRYSTAL GROWTH
·
2018
·
IF 1.742
Xuehua Zhang,Liang Yu,Wei Zhang,Fangren Hu,Yongjin Wang
PS microspheres emulsions with different PS diameters of 207 and 378 nm were prepared by using an emulsifier-free polymerization method. A novel secondary self-assembly method which combined the spin coating and the lifting-up method was used to prepare the close-packed PS MCC films. During the process, the PS MCC film was firstly assembled on a glass substrate by a spin coating technique. Secondly, the obtained PS MCC film was transferred on the air-water interface by immersing the PS glass substrate in water using a dip-coater. Thirdly, the floating close-packed PS MCC films on the air-water interface was transferred to a new glass substrate by using a lifting-up method. During the spin-coating and the self-assembly process, some SDS solution was added in the PS films to improve the uniformity of the PS layer. Effects of the spin-coating speeds, the SDS solution concentration and the lifting-up rates on the morphology of PS MCC films have been discussed. Scanning electron microscopy was used to observe the morphological properties of the PS colloidal crystal films. Results indicate that a relatively close-packed and large scale PS MCC films can be obtained when the spinning speed is 2000 rpm for 60 s, the SDS solution concentration is 2 wt% and the lifting-up rate is 2 mm/min. Furthermore, the polydimethylsiloxane soft mold was replicated from the-fabricated PS MCC films and was then imprinted onto the photosensitive hybrid film under UV-irradiation and thus the micro-lens arrays built in the photosensitive hybrid sol–gel film were obtained.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Min Deng,Chuxiang Zhou,Gang Wu,Yinan Xu,Shenwen Fang,Ming Duan
Anisotropic particles have garnered significant attention due to their unique structural characteristics, and emulsion polymerization is one of the synthesis strategies. In this study, for the first time, poly(styrene-maleic anhydride) (SMAA) and small-molecule surfactant were employed as the composite emulsifiers during the emulsion polymerization of styrene (St) for synthesizing peanut-shaped polystyrene (PS) nanoparticles. The results of NMR, FTIR, and SEM confirmed this method was reliable. Furthermore, the polymerization conditions were optimized by using particle morphology as the primary optimization parameter. The optimized polymerization conditions are as follows: St concentration of 11 wt%, emulsifier concentration of 0.6 wt% in water, the emulsifier being a composite system of sodium dodecylbenzenesulfonate (SDBS) and SMAA in a mass ratio of 1:2, initiator concentration of 0.5 wt% (relative to St mass), crosslinker dosage 0.6 wt% (relative to St mass), reaction temperature of 70°C, and the reaction duration of 6 h. The resulting polymer products exhibited a distinct peanut-like morphology, with an average particle diameter of 54.1 nm and an aspect ratio of 2.44. These findings provide some novel insights into the preparation of anisotropic particles.
研究领域:
材料科学
·
高分子化学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 9
·1404-1414
·
IF 5.047
Yamin Chai,Jie Chen,Tingting Wang,Jian Chen,Yingda Ma,Guanghui Cheng,Chunran Li,Qian Zhang,Lailiang Ou,Wenzhong Li
A novel nano-CaCO3 (nCaCO3) particle composite-derived polystyrene (PS) resin was successfully synthesized by a suspension polymerization method. The nCaCO3 reinforced PS material (PS/nCaCO3) possessed a structure with abundant mesopores of high porosity, high specific surface area (828.3 m2 g−1) and large pore volume (1.83 cm3 g−1). It was revealed that the incorporation of nCaCO3 into the PS matrix enhanced both the mechanical strength which can prevent the fragmentation and its adsorption capacity for interleukin-6 (IL-6, MW = 24.0 kDa) from human plasma. The adsorption isotherm could be described by the Langmuir model and classified as S-3 type, showing an IL-6 uptake of up to 25.6 ng g−1 at an equilibrium concentration of about 500 ng L−1. The adsorption capacity for IL-6 of PS/nCaCO3 is not only significantly higher than that of PS (without nCaCO3), but also superior to those of currently available adsorbents that are under clinical studies (e.g., CytoSorb™ towards cytokines). In addition, the PS/nCaCO3 adsorbent also had good hemocompatibility and showed no leakage of nCaCO3 in the plasma in a flowing model system. Therefore, the synthesized PS/nCaCO3 nano-composite has a great potential to be used as an efficient adsorbent for the removal of interleukin-6 (IL-6) from blood of inflammatory and auto-immune disease patients through hemoperfusion.
研究领域:
材料科学
·
生物医学工程
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wenqian Zhang,Shengming Zhang,Samuel Knoedler,Wenhao Han,Kangkang Zha,Hui Li,Adriana Christine Panayi,Michael Alfertshofer,Bong-Sung Kim,Weixian Hu,Yanzhi Zhao,Qian Feng,Yuval Rinkevich,Bobin Mi,Guohui Liu
Efferocytosis is a critical process whereby macrophages residing in the wound area play a key role in the efficient clearing and degradation of apoptotic neutrophils. This process is followed by a phenotypic transition toward an anti-inflammatory state, essential for inflammation resolution and tissue repair. The cystine/glutamate antiporter SLC7A11 has recently been identified as an inhibitor of efferocytosis, and its blockade has been found to enhance wound healing. In this study, we demonstrated that tiliroside, a plant-derived glycoside containing flavones, binds directly to SLC7A11 and pyruvate kinase isozyme M2 (PKM2). This was established by molecular docking predictions and activity-based protein profiling (ABPP). Cytological experiments revealed that tiliroside promoted the process of efferocytosis and led to glycolysis-related macrophage reprogramming. To facilitate targeted drug delivery to macrophages at diabetic wound sites, we designed a novel hybrid biomaterial. This hybrid biomaterial, prepared as Gel@Til iRGD&PS@PLGA NPs is manufactured by loading tiliroside (Til)-conjugated iRGD&PS double modified lipid nanoparticles (iRGD&PS@PLGA NPs) into a pH-responsive hydrogel matrix. The administration of Gel@Til iRGD&PS@PLGA NPs in diabetic cutaneous wound models has been shown to significantly promote tissue regeneration through the promotion of efferocytosis and glycolysis-related macrophage reprogramming. Therefore, this study introduces a novel approach to diabetic wound management by leveraging the promotion of efferocytosis.
研究领域:
生物材料
·
纳米技术
·
伤口愈合
·
糖尿病
·
免疫学
·
药理学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 17
·51303-51313
·
IF 5.8
Lu Hongyu,Gao Wei,Deng Chengxun,Liu Xiaowei,Li Weiping,Yu Zhimin,Ding Haitao,Zhang Ling
Single degradation systems based on dielectric barrier discharge plasma (DBDP) or persulfate (PS) oxidation cannot achieve the desired goals (high degradation efficiency, high mineralization rate, and low product toxicity) of degrading atrazine (ATZ) in river sediment. In this study, DBDP was combined with a PS oxidation system (DBDP/PS synergistic system) to degrade ATZ in river sediment. A Box–Behnken design (BBD) including five factors (discharge voltage, air flow, initial concentration, oxidizer dose, and activator dose) and three levels (− 1, 0, and 1) was established to test a mathematical model by response surface methodology (RSM). The results confirmed that the degradation efficiency of ATZ in river sediment was 96.5% in the DBDP/PS synergistic system after 10 min of degradation. The experimental total organic carbon (TOC) removal efficiency results indicated that 85.3% of ATZ is mineralized into CO 2 , H 2 O, and NH 4 + , which effectively reduces the possible biological toxicity of the intermediate products. Active species (sulfate (SO 4 • − ), hydroxy (•OH), and superoxide (•O 2 − ) radicals) were found to exert positive effects in the DBDP/PS synergistic system and illustrated the degradation mechanism of ATZ. The ATZ degradation pathway, composed of 7 main intermediates, was clarified by Fourier transform infrared spectroscopy (FTIR) and gas chromatography-mass spectrometry (GC–MS). This study indicates that the DBDP/PS synergistic system is a highly efficient, environmentally friendly, novel method for the remediation of river sediment containing ATZ pollution.
研究领域:
环境科学
·
化学工程
·
水处理
·
污染控制
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2018
·Vol. 59
·期 2
·411-417
·
IF 1.551
Xuelin Zheng,Wei Cheng,Shuning Chen,Jiawen Chen,Qinhui Chen
Urushiol praseodymium-polystyrene (UPr-PS) Janus composite particles were synthesized by emulsion swelling assisted protruding from UPr/PS core-shell composite microspheres. The effects of sulfonated time and the outer electronic configuration of metal on the shell of urushiol metal/PS composite microspheres, together with the effects of monomer type, monomer dosage and swelling time on the swelling behaviour, were studied. The morphology, chemical composition and thermal performance of UPr/PS core-shell composite microspheres and UPr-PS Janus composite particles were studied by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analyzer (EDX), Thermogravimetric analysis (TG) and infrared spectrometer (IR). Results showed that the morphology could be controlled by the metal kind, the sulfonated time, the monomer type, the monomer dosage and the swelling time. Attributing to the novel anisotropic structure, the UPr-PS Janus composite particles will be expected to be applied in oriented catalyst. POLYM. ENG. SCI., 59:411–417, 2019. © 2018 Society of Plastics Engineers
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2020
·Vol. 32
·期 6
·1354-1363
·
IF 2.544
Pengcheng Zhao,Meijun Ni,Chao Chen,Chenxi Wang,Pingping Yang,Xiahui Wang,Chunyan Li,Yixi Xie,Junjie Fei
A novel self-protection sensor was successfully constructed based on an interesting thermo-sensitive triblock polymer PS-PNIPAm-PS. At low temperatures (<24 °C), the analyte was able to undergo the redox process at the modified electrode. However, the polymer shrunk and accumulated at high temperatures (>30 °C), which dramatically increased the electron transfer resistance (Rct) of the modified electrode and consequently blocked the occurrence of the redox reaction to protect the electrode from high temperatures and enhance its stability. Under optimized conditions, the proposed sensor showed a good detection range for hydroquinone (6×10 −7 to 2.35×10 −3 M) and a low LOD (490 nM). The sensor was also successfully applied for detecting hydroquinone in real samples. The present work may provide a novel method for electrode protection, high-temperature alarm, high-temperature protection of batteries and new sensors production.
研究领域:
分析化学
·
材料科学
·
电化学传感器
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）