NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 45
·期 2
·679-684
·
IF 3.288
Rui Xue,Hao Gou,Li Zhang,Yinsheng Liu,Honghong Rao,Guohu Zhao
A new two-dimensional covalent organic polymer material (ST-1) was synthesized by the condensation of squaric acid and melamine. The preparation is simple and cheap. Fourier transform infrared spectra (FT-IR), X-ray photoelectron spectroscopy (XPS), N2 adsorption–desorption, powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) were employed to characterize the structure and properties of ST-1. This material presents the highest specific capacitance value of 177.6 F g−1 at a current density of 0.3 A g−1 in a three electrode configuration in a 6 M potassium hydroxide electrolyte. The retention rate of the specific capacitance can be maintained at about 60.24% when the current density is increased by 50 times. It is worth mentioning that ST-1 also demonstrates about 94% capacitance retention after 10 000 galvanostatic charge–discharge cycles.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 11
·9164-9174
·
IF 3.289
Mingjia Chen,Chunmei Gao,Shaoyu Lü,Yuanmou Chen,Mingzhu Liu
At present, diselenide bonds have been considered as a novel dual redox-sensitive linkage. Nevertheless, few studies have focused on diselenide-linked polysaccharide as new biological materials. In this work, the diselenide-linked mPEGylated starch amphiphilic copolymers (mPEG-SeSe-St), which combined the biocompatibility of polysaccharide and the stimuli-responsiveness of diselenide linkages, were developed as a novel type of PEG-detachable drug vector for rapid drug release. The amphiphilic design of the mPEG-SeSe-St enabled the formation of self-assembled micelles with spherical core–shell structures in aqueous solution. The data of well-ordered appraisals demonstrated that mPEG-SeSe-St could be disrupted in the presence of a low concentration of hydrogen peroxide (H2O2, 0.1% (v/v)) or glutathione (GSH, 1 mM). The process of diselenide bonds' more rapid degradation than disulfide bonds led to a synergistically enhanced release of loaded anticancer drugs (DOX) in cellular environments. These results, combined with cell viability measurements and confocal laser scanning microscopy (CLSM), indicated that mPEG-SeSe-St micelles might have appeared as a refined platform for cancer therapy.
研究领域:
药剂学
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生物材料科学
·
肿瘤学
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DOI
高影响因子
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
·
2024
·Vol. 60
·期 2
·309-314
·
IF 0.6
Liu Tianyu,Ye Zhongbin,Liu Dong
Utilizing emulsion polymerization, a microcapsule breaker with a polystyrene-polyacrylamide core-shell structure was synthesized. Ammonium persulfate served as the breaker, polystyrene as the shell, and polyacrylamide as the drug-carrying agent. The results demonstrated that the synthesized microencapsulated gel-breaker exhibited a uniform spherical shape, superior water dispersion, and enhanced thermal stability. Conductivity tests indicated that the core-shell structure of the microcapsules effectively regulated the release of ammonium persulfate as a gel-breaking agent, resulting in delayed polymer gel-breaking.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2013
·Vol. 172
·期 2
·701-712
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IF 1.893
Cui Yanjun,Chen Xia,Li Yanfeng,Liu Xiao,Lei Lin,Zhang Yakui,Qian Jiayu
Using emulsion copolymer of styrene (St), glycidyl methacrylate (GMA) and 2-hydroxyethyl methacrylate (HEMA) as seed latexes, the superparamagnetic polymer emulsion particles were prepared by seeded emulsion copolymerization of butyl methacrylate (BMA), vinyl acetate (VAc) and ethylene glycol dimethacrylate in the presence of the seed latexes and superparamagnetic Fe 3 O 4 /SiOx nanoparticles (or Fe 3 O 4 -APTS nanoparticles) through a two-step process, without addition of any emulsifier. The magnetic emulsion particles named P(St-GMA-HEMA)/P(BMA-VAc) were characterized by transmission electron microscope and vibrating sample magnetometry. The results showed that the magnetic emulsion particles held a structure with a thinner shell (around 100 nm) and a bigger cavity (around 200 nm), and possessed a certain level of magnetic response. The resulting magnetic emulsion particles were employed in the immobilization of lipase by two strategies to immobilized lipase onto the resulting magnetic composites directly (S-1) or using glutaraldehyde as a coupling agent (S-2), thus, experimental data showed that the thermal stability and reusability of immobilized lipase based on S-2 were higher than that of S-1.
研究领域:
材料科学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROBIAL PATHOGENESIS
·
2022
·
IF 3.848
Bingxin Liu,Han Lu,Zong Li,Peihan Yan,Ruyin Liu,Xinchun Liu
Salmonella infection is a major public health concern. Several strategies for Salmonella infection prevention and control are currently available including vaccines and antibiotics. However, vaccines are expensive and inefficient, and the use of antibiotics can lead to antibiotic resistance. Thus, alternative strategies for the treatment of Salmonella remain warrant. In this study, recombinant holin HolST-3 and lysin LysST-3 from Salmonella phage ST-3 were expressed and purified, and their bactericidal properties were analyzed. HolST-3 and LysST-3 possessed a wider lysis spectrum and more efficient bactericidal effect than phage ST-3, and a synergistic bactericidal effect was observed when combined in vitro . In addition, we explored the bactericidal properties of HolST-3 and LysST-3 in vivo using zebrafish as a model organism, and found that the bactericidal effects of both HolST-3 and LysST-3 in vivo were comparable to those of cefotaxime , an antibiotic. This study provides a basis for the development of HolST-3 and LysST-3 as novel bactericidal agents for the prevention and treatment of infectious diseases caused by Salmonella spp.
研究领域:
微生物学
·
传染病学
·
药理学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Ning Zhang,Suting Zhong,Xiang Zhou,Wei Jiang,Tianhe Wang,Jiajun Fu
Poly (styrene-divinylbenzene) (P (St-DVB)) foams with porosity as high as 98% were prepared by the method of high internal phase emulsions (HIPEs) in one-step process. The materials exhibited superhydrophobicity and excellent oleophilicity, with the water contact angle (WCA) even exceeding 150° and oil contact angle approaching 0°. The materials fabricated with different types of Fe 3 O 4 particles had varied hierarchical pore structures. And the adsorption capacity of the monolithic foam towards chloroform was as high as 57 g/g. Importantly, the materials soaked with oil could be regenerated effectively by means of centrifugation with oil recovery rate reaching 90%. More importantly, the monolithic PolyHIPEs (polymers obtained by the polymerization of the HIPEs) were subjected to 20 adsorption-centrifugation cycles and superior reusability was demonstrated. These features achieved with PolyHIPEs made them ideal candidates for practical oil removal applications.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 30
·65414-65421
·
IF 5.6
Mingyang Chen,Juanjuan Wang,Biao Chen,Fusheng Lai,Zhanhui Peng,Xiaolian Chao,Yanmin Jia
Various industrial dye wastewaters are difficult to treat and have resulted in serious environmental problems. The recent tribocatalytic technology, which degrades dyes by harvesting friction energy, has brought great hope. The ferroelectric property is helpful for enhancing charge transfer and storage, which is expected to result in the strong tribocatalytic performance for dye wastewater treatment. In this study, (1- x )Bi 0.5 Na 0.5 TiO 3 - x SrTiO 3 (abbreviated as (1- x )BNT- x ST, x = 0.2, 0.25, 0.3, 0.35, 0.4) particles are produced employing the traditional solid-state sintering technique. It is found that the 0.7BNT-0.3ST powder catalyst can behave has the maximum tribocatalytic performance with a 96 % degradation ratio for Rhodamine B (RhB) dyes after being stirred for 3.5h. The experiments demonstrate that these primary active substances during the catalytic process are ⋅OH and h + . The 0.7BNT-0.3ST has excellent ferroelectric properties and high dielectric constant, which may contribute to the excellent tribocatalytic performance. Furthermore, degradation ratio of RhB dye by 0.7BNT-0.3ST powder can still reach 89 % after three cycles. The ferroelectric 0.7BNT-0.3ST powder, with its advantages of excellent catalytic performance, simple synthesis route, and low cost, is an ideal option for the water purification by harvesting the friction energy has potential application prospects.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Li-Qian Cheng,Zhiping Wang,Xin Li,Pengcheng Wang,Qingna Li,Yue Wang,Weibin Cai
Advanced lead-free energy storage ceramics play a critical role in the development of next-generation pulse power capacitors. However, it remains challenging to attain high recoverable energy density ( W rec ) and efficiency ( η ) within a moderate electric field environment. In this study, the evolution of energy storage performance with increasing configurational entropy change Δ S config (Δ S config = 1.09R, 1.56R, 1.78R, 1.84R) was systematically investigated in Bi 0.5 Na 0.5 TiO 3 -SrTiO 3 -K 0.5 Na 0.5 NbO 3 (BNT-ST-KNN) ceramics. The resulting high-entropy lead-free relaxor ferroelectrics achieved a W rec of 5.3 J/cm 3 and an η of 83%, representing a nearly 76% increase in energy storage density compared to low-entropy ones in BNT-ST-KNN system. The superior energy storage performance is attributed to strong multiple local distortions and an enhanced breakdown field. Furthermore, the ceramics exhibit excellent frequency and temperature stability, as well as robust charging/discharging performance with thermal stability. These results indicate that increasing Δ S config is a practical strategy for designing high-performance dielectrics, promoting the development of capacitor technologies.
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 130
·期 1
·645-653
·
IF 1.395
Wenlong Qin,Gang Wu,Peipei Yin,Hongzheng Chen
RGB tricolor organic pigments were in situ modified by stearyl methacrylate-2-(dimethylamino)ethyl methacrylate-styrene random copolymer [P(SMA-DMA-St)] through solution polymerization. The modified particles were charged in tetrachloroethylene (TCE) with the aid of suitable charge control agent. The structure and electrophoretic property of ink particles were characterized by FTIR, TEM, PALS, et al. P(SMA-DMA-St) modification decreased the particles size and enhanced the suspending stability of the pigments in tetrachloroethylene due to the repulsive forces among the treated pigment particles resulting from the extending polyacrylate chain in the media. Partial crosslinking the P(SMA-DMA-St) on the pigment surface with ethylene glycol dimethacrylate (EGDMA) helped to increase the Zeta potential and electrophoresis mobility of RGB electrophoretic particles. The maximum values of the Zeta potential for red, green, and blue electrophoretic particles reached −36.2, −57.7, and −42.7 mV, respectively. The obtained RGB electrophoretic particles could be applied in the color/white dual-particle electronic ink together with charged TiO 2 to show vivid color and white images under a DC electric field. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Xiangqiong He,Bing Yu,Xiulan Zhang,Hailin Cong
By changing the amount of acrylic acid, different monodisperse poly(styrene-co-methyl methacrylate-co-3-sulfopropyl methacrylate potassium salt-co-acrylic acid) (P(St-MMA-SPMAP-AA)) microspheres are synthesized by soap-free emulsion polymerization . Two-dimensional or three-dimensional PSMSSA colloidal crystals are successfully prepared by the gas-liquid interface assembly method. A noticeable shift of the bandgap of the PSMSSA colloidal crystals is observed at different pH, after the addition of diluted HCl aqueous, a structure color of amaranth is found for the PSMSSA colloidal crystals, and a structure color of blue-green is formed under neutral conditions. By using PSMSSA colloidal crystals on the liquid interface , the colloidal voids are filled with liquid, and its optical and pH-responsive properties can be directly measured without re-transfer, realizing the simple and efficient preparation of pH-responsive colloidal crystals sensors. Compared with the traditional pH sensor, the gas-liquid interface self-assembled colloidal crystals sensor is not only economical and economical, but also a reversible sensor visible to the naked eye.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2015
·
IF 3.088
Zhao Chen,Xiaowen Sun,Yan Shen,Hong Ni,Shigan Chai,Qichao Zou,Xiuhua Zhang,Jinzhi Zhang
In this study, a stable antibacterial poly(styrene-co-butyl acrylate) (poly(St-co-BA)) nano-latex was prepared in the presence of a dioctyldimethylammonium chloride (D821)-CTAB mixed surfactant and a novel bis -unsaturated Gemini comonomer (i.e., α, ω -hexanediyl bis (dimethyl methacrylamidopropyl ammonium bromide) (G MAP-6-MAP )) using a feasible and mild semicontinuous technology. The effects of the emulsifiers and G MAP-6-MAP on the properties and antibacterial activities of poly(St-co-BA) coatings were systematically investigated. The results indicate that an optimal monodispersed stable nanoemulsion was obtained with Dw = 58.24 nm and PDI = 0.026, the emulsifier amount was 3.75% (D821/CTAB = 4:1), and the G MAP-6-MAP amount was 1.5%. CTAB improved the stabilities and antibacterial activities of the poly(St-co-BA) nanoemulsions. The incorporation of G MAP-6-MAP into poly(St-co-BA) can enhance the antibacterial activity, improve the thermal stability of latex films, as well as the consistency among the chain segments, and decrease the roughness of latex films. This nanoemulsion exhibits effective antibacterial activity with MBCs of 2 μg·mL − 1 against Staphylococcus aureus and 16 μg·mL − 1 against Escherichia coli . The sterilization rates of the optimized latex film reached 100% against S. aureus and 98.74% against E . coli , which indicated that this latex film could be utilized as an outstanding antibacterial coating.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
TALANTA
·
2023
·
IF 6.1
Yaqi Zhang,Yong Man,Jingna Li,Yaming Sun,Xiuming Jiang,Lijun He,Shusheng Zhang
The aflatoxin B 1 (AFB 1 ) early warning technique based on precursors is an effective strategy for the prevention of AFB 1 contamination risk. The determination of precursors is imperative to ensure the efficiency of the early warning technique. Herein, a controllable magnetic adsorbent Fe 3 O 4 /ZIFs was first introduced for the effective extraction and determination of averantin (AVN) and sterigmatocystin (ST) precursors in cereal by combining magnetic solid-phase extraction (MSPE) and high-performance liquid chromatography (HPLC). Benefiting from the abundant adsorption sites and multifunctional groups matching the analytes , Fe 3 O 4 /ZIFs effectively and simultaneously extracted AVN and ST with great differences in polarity and structure via multiple interactions. AVN was extracted by Fe 3 O 4 /ZIFs mainly through π–π and hydrophobic interactions, while ST was extracted predominantly by electrostatic interactions and surface complexation. The limits of detection were 0.08 μg kg −1 (AVN) and 0.36 μg kg −1 (ST). The developed method exhibited satisfactory spiked recoveries (79.1%–105.4%) in the determination of AVN and ST in rice. This work provides a novel analytical strategy for further studying AFB 1 early warning technique and the formation and transformation of aflatoxins .
研究领域:
分析化学
·
食品安全
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）