WOOD SCIENCE AND TECHNOLOGY
·
2023
·Vol. 57
·期 2
·523-535
·
IF 3.4
Zhou Yihang,Zhang Yue,Wang Kai,Hu Dongbo
Controls over the dimensions of waterlogged archaeological wood (WAW) upon drying are a critical issue for its conservation. Surface-initiated activator regenerated by electron transfer atom transfer radical polymerization (SI-ARGET ATRP) has been proven to be an effective consolidation method to increase the dimensional stability. However, the drawback of the current method is that the expansion stress generated during graft polymerization cannot be well controlled. An improved SI-ARGET ATRP system using a bifunctional monomer ethylene glycol dimethacrylate (EGDMA) to introduce a cross-linking process during the polymerization is presented in this paper. Both Pinus massoniana and Sapium sp. samples with different maximum moisture contents as 507% and 863%, respectively, show a reduced volumetric shrinkage of around 5% without any expansion phenomenon after the treatment. This method shows potential applications in the field of WAW conservation and may provide a new solution for consolidation of other organic archaeological objects as well as developing new wood-based materials.
研究领域:
考古学
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材料科学
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文物保护
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Wendi Huo,Jincheng Li,Yupeng Wen,Xinyuan Zhang,Huan Liu,Yingchun Mu,Chunhui Zhao,Chaoying Zhang,Rongyue Zhang
In this study, we present a simple and rapid boronate affinity extraction methodology for the HPLC-MS/MS analysis of four nitrofuran metabolites (NFMs) including SEM, AOZ, AHD and AMOZ in fish samples. To enhance the efficacy of this approach, mesoporous poly(GMA-EGDMA) microspheres, abundant in cis-diols, were synthesized for boronate affinity extraction. Meanwhile, 4-fluoro-3-formylphenyl boronic acid was utilized for the derivatization of NFMs, facilitating the immobilization of boronate ligands onto their molecular structures. Compared to the Chinese national food safety standard GB 31656.13–2021, the boronate affinity extraction eliminates the need for extraction solvents and centrifugation, streamlines the pretreatment process, and maintains a mild extraction environment. Furthermore, the poly(GMA-EGDMA) microspheres exhibited excellent reusability, retaining their performance over six adsorption-desorption cycles. The NFMs demonstrated excellent linearity (R² > 0.999) across the range of 0.5 to 50 µg kg⁻¹ . The quantitative limit was established at 0.5 µg kg⁻¹ . The recoveries of spiked tilapia samples ranged from 94.2 % to 110.7 %, while intra-day and inter-day RSDs were below 5.9 %. This method emerges as an economical, straightforward, rapid, and sensitive alternative for monitoring of NFM residues in aquatic products.
研究领域:
食品科学
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分析化学
·
环境科学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
·
2023
·
IF 3.4
Cheng Fang,Chaobo Wu,Xiaoyan Zhao
Cross-linked acrylate latex pressure sensitive adhesives (PSAs) were synthesized via unseeded semi-batch emulsion polymerization processes with butyl acrylate (BA), acrylic acid (AA), 2-hydroxyethyl acrylate (HEA) and difunctional cross-linker, ethylene glycol dimethacrylate (EGDMA). The influences of EGDMA on the comprehensive properties of the acrylate latex PSAs were investigated. The results indicated that both viscosity and particle size of the latexes were independent of the amount of EGDMA in the pre-emulsion feed when unseeded semi-batch emulsion polymerization process was employed. It was also found that water resistance of the latex PSA was improved with increasing EGDMA content, further confirmed by water contact angle measurements . DSC and TGA results showed that T g of the copolymer was elevated, plus thermal stability was increased with introduction of EGDMA. Besides, with the increase of EGDMA content, the gel content of the polymer increased. Moreover, for the cross-linked adhesive film , the shear strength was improved greatly while at the sacrifice of loop tack and peel strength, when compared with the uncross-linked counterparts.
研究领域:
材料科学
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聚合物化学
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粘合技术
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DOI
高影响因子
JOURNAL OF POLYMER ENGINEERING
·
2015
·Vol. 35
·期 9
·847-857
·
IF 0.465
Jingshui Xu,Denglong Chen,Xianglong Hu,Yangchuan Ke,Qian Zhou,Wensuai Gao,Zheling Zeng,Guoliang Zhang
The poly(methyl methacrylate-ethylene glycol dimethacrylate-2-acrylamido-2-methylpropanesulfonic acid) [poly(MMA-EGDMA-AMPS)] microsphere was produced by a soap-free emulsion polymerization of MMA, EGDMA and AMPS. The chemical composition, morphology, particle size distribution and properties of the obtained microspheres were characterized by energy dispersive spectrometer (EDS), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), a laser particle analyzer and thermogravimetric analysis (TGA). Results showed that the microspheres had a high-quality spherical morphology, irrespective of the components, and their particle sizes mainly ranged from 10 μm to 70 μm. The microspheres were thermally stable up to 190°C. As the AMPS loading was increased, the synthetic yield rate decreased and the water uptake increased. The optimum synthetic yield rate and water uptake were obtained at a 2.0 wt% AMPS. In addition, the selected microspheres with a diameter of approximately 25 μm provided an effective plugging, and the plugging rate was up to 80%. This study demonstrated that the plugging behavior of microspheres was due to their deformation, migration and aggregating properties in the plugging process, which made them potential materials for modifying the porous reservoir to enhance oil recovery in petroleum engineering.
研究领域:
材料科学
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石油工程
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DOI
高影响因子
Analytical Methods
·
2012
·Vol. 4
·期 12
·4140-4145
·
IF 1.547
Juan Zhang,Tao Bao,Zilin Chen
In this study, a reversed-phase C18 polymeric monolith column of stearyl methacrylate-co-ethylene glycol dimethacrylate (SMA-EGDMA) was prepared and used to separate polycyclic aromatic hydrocarbons (PAHs) by capillary electrochromatography. The prepared column exhibits a good efficiency of 20,000 plates per m for naphthalene. The separation conditions for PAHs were systematically optimized. The optimized condition for the mobile phase was acetonitrile/10 mM ammonium acetate, pH 7 (80/20, v/v), and the applied voltage was set at 28 kV. Subsequently, an on-line concentration was employed to the CEC separation and by changing injection time a dramatic improvement was observed in the detection sensitivity up to 50-fold enhancement, achieving nanogram level with almost no loss of resolution. Six polycyclic aromatic hydrocarbons (naphthalene, fluorene, phenanthrene, fluoranthene, pyrene, benz[a]anthracene) showed good linearity with linear correlation coefficient R > 0.99. Reproducibility of the column was investigated. Relative standard deviations of migration time (n = 5) and peak area (n = 5) were in the range of 4.71–4.93% and 4.88–6.65%, respectively, for the six polycyclic aromatic hydrocarbons on the SMA-EGDMA polymeric monolith column. The percentage recoveries of six PAHs including naphthalene, fluorene, phenanthrene, fluoranthene, pyrene and benz[a]anthracene in East Lake water samples at three different concentrations are 93.7–102.5, 98.6–108.1, 92.6–105.9, 95.2–102.1, 91.8–105.4, and 100.9–103.7, respectively.
研究领域:
分析化学
·
环境科学
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DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2021
·Vol. 222
·期 17
·2100145
·
IF 2.527
Qiaoge Fu,Nana Chen,Guanyu Wang,Ruili Guo
The poly (ethylene glycol dimethacrylate- co -vinylphenylboronic acid) P(EGDMA- co -VPBA) adsorbents are prepared via reversible addition-fragmentation chain transfer (RAFT) precipitation polymerization with 4-vinylphenylboronic acid (VPBA) as the functional monomer, and used for selective adsorption of steviol glycosides (SGs). The boron content and pore structure of the P(EGDMA- co -VPBA) adsorbent are adjusted by changing the polymerization conditions. The adsorption results show that the pore structure of the P(EGDMA- co -VPBA) affects the adsorption capacity to SGs, the presence of boric acid functional groups shows favorable adsorption selectivity for stevioside (STV), and the adsorption selectivity is proportional to the content of boric acid in P(EGDMA- co -VPBA) adsorbents. The adsorption performance of P(EGDMA- co -VPBA) toward SGs is the best when the ratio of monomer to cross-linker is 1:50 and the solvent is acetonitrile. In the SG solution (6.0 mg mL −1 , C STV / C RA = 1:1), the adsorption capacities and adsorption selectivity ( α STV/RA ) of P(EGDMA- co -VPBA) to SGs are 113.20 mg g –1 and 4.99, respectively. The adsorption kinetics and isotherm data obey pseudo-second-order kinetic model and Langmuir isotherm model, respectively. The boric acid copolymers with VPBA as the monomer prepared by the one-step method can become a promising material for efficient separation and purification of SGs.
研究领域:
化学工程
·
食品科学
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DOI
高影响因子
TALANTA
·
2013
·
IF 3.498
Junling Zhang,Gang Chen,Miaomiao Tian,Ruigang Li,Xinjun Quan,Qiong Jia
γ-Alumina nanoparticles (γ-Al 2 O 3 ) were introduced to the conventional poly(methacrylic acid- co -ethylene glycol dimethacrylate) (MAA- co -EGDMA) monolith to prepare a novel organic-inorganic hybrid monolith, poly(MAA- co -EGDMA)-Al 2 O 3 monolith. The polymerization was induced in-situ with UV irradiation in an ultraviolet transparent polymethyl methacrylate (PMMA) microfluidic chip. The monolith-based solid phase microextraction system was used for the on-line determination of 2-amino-4-chlorophenol (ACP) in chlorzoxazone tablets coupled with an optical fiber spectrophotometer. Several parameters affecting the adsorption/desorption, including sample pH value, sample flow rate , sampling time, eluent flow rate, and eluting time, were investigated in detail. Under the optimized conditions, limit of detection (LOD) and limit of quantification (LOQ) of the method were calculated to be 2.8 and 9.1 µg L −1 , respectively, with the relative standard deviation (RSD) of 3.1%.
研究领域:
分析化学
·
药物分析
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产品关联
DOI
PubMed
高影响因子
Optical Materials Express
·
2015
·Vol. 5
·期 6
·1460-1468
·
IF 2.844
Gai Xu,Yuebin Li,Yu Qin,Zuli Liu,Junbo Han,Yibo Han,Kailun Yao
Quantum dots (QDs) based composite thin films show great promise in the application areas ranging from light-emitting diodes (LEDs), nonlinear optical devices to luminescent solar concentrators. We propose and demonstrate a facile method to fabricate ZnSe:Mn QDs/Poly (lauryl methacrylate-co- ethylene glycol dimethacrylate) (QDs/ Poly(LMA-co-EGDMA) composite thin films which show high transmittance up to 90%. Moreover, the as prepared QDs/P composite thin films exhibits high quantum yields (QYs) which could be well tuned from 35% to 67%.The enhanced transparency and QYs of these QDs/P composite thin films are attributed to the triple function of surface decorated 1-dodecanethiol (DDT) including the reducing of surface defects, oxidation resisting and enhancement of dispersity. These prominent performances make them very attractive for applications in various future light-emitting technologies and advanced optoelectronic devices.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2018
·Vol. 33
·期 2
·e4708
·
IF 3.581
Mingliang Ma,Yuying Yang,Dili Liao,Ping Lyu,Jinwei Zhang,Jianli Liang,Lizhi Zhang
A strategy has been developed for the synthesis, characterization and catalysis of magnetic Fe 3 O 4 /P(GMA-EGDMA)-NH 2 /HPG-COOH-Pd core-shell structure supported catalyst. The P(GMA-EGDMA) polymer layer was coated on the surface of hollow magnetic Fe 3 O 4 microspheres through the effect of KH570. The core-shell magnetic Fe 3 O 4 /P(GMA-EGDMA) modified by -NH 2 could be grafted with HPG. Then, the hyperbranched glycidyl (HPG) with terminal -OH were modified by -COOH and adsorbed Pd nanoparticles. The hyperbranched polymer layer not only protected the Fe 3 O 4 magnetic core from acid–base substrate corrosion, but also provided a number of functional groups as binding sites for Pd nanoparticles. The prepared catalyst was characterized by UV–vis, TEM, SEM, FTIR, TGA, ICP-OES, BET, XRD, DLS and VSM. The catalytic tests showed that the magnetic Fe 3 O 4 /P(GMA-EGDMA)-NH 2 /HPG-COOH-Pd catalyst had excellent catalytic performance and retained 86% catalytic efficiency after 8 consecutive cycles.
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2018
·Vol. 32
·期 12
·e4534
·
IF 3.581
Mingliang Ma,Yuying Yang,Renjun Feng,Li Jia,Guopeng Chen,Wenting Li,Ping Lyu
A highly effective and stable hollow Fe 3 O 4 /P(GMA-EGDMA)-SO 3 H/Au-PPy catalyst was prepared. Monodisperse hollow Fe 3 O 4 microspheres were synthesized using a hydrothermal method. As the catalyst support, magnetic hollow Fe 3 O 4 /P(GMA-EGDMA) microspheres with core–shell structure were prepared by distillation precipitation polymerization. Then sulfonic acid groups (─SO 3 H) were introduced into the surface of the support by surface modification. Au 3+ could be adsorbed by coordination with ─SO 3 H and underwent redox reactions with added pyrrole monomers. Finally, an Au–polypyrrole (PPy) layer was formed on the surface of the Fe 3 O 4 /P(GMA-EGDMA)-SO 3 H microspheres. The synthesized material was characterized using various techniques. Results indicated that the as-prepared hollow Fe 3 O 4 /P(GMA-EGDMA)-SO 3 H/Au-PPy catalyst had excellent catalytic activity and exhibited reusability for the reduction reaction of 4-nitrophenol. In addition, the catalyst was reusable for at least ten successive cycles.
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.8
Hongjian Chen,Huanjiang Niu,Yunpeng Wang,Jiannan Jia,Songle Wang,Yuwen Yuan,Pragati Awasthi,Xvsheng Qiao,Shisheng Ling,Zhenzhen Ge,Dong Chen,Wenkun Dong,Guodong Qian,Xianping Fan,Yubing Dong
Lanthanide complexes based fluorescent microspheres are widely used in lateral flow immunoassay (LFIA) measurements of small melecules, such as methamphetamine (MET), due to their efficient fluorescence. However, the easily occurred aggregation of lanthanide complexes often leads to concentration quenching effect of fluorescence, which severely deteriorate the biodetection performance of fluorescent microspheres. Here, in order to optimize the distribution of lanthanide complexes, the crosslinked agent dimethacrylate (EGDMA) is introduced in the microspheres polymerization. By adjusting the concentration of EGDMA, the aggregation of lanthanide complexes is reduced, which inhibits fluorescence quenching effect and enhances fluorescence intensity of the fluorescent microspheres. Such fluorescent microspheres thus achieve highly sensitive detection of MET, with showing a detection limit of 0.048 ng mL −1 with excellent stability. This study provides a new idea for the optimal design of lanthanide complexes dispersed fluorescent latex beads, which is expected to promote the development of advanced In Vitro Diagnostics (IVD) technologies to rapid and precise screening of small molecules.
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DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Gang Xie,Yiping Hao,Yang Bai,Xiangyang Xu,Lv Xia,Ting Huang,Weichao Du,Jingjie Ge
Nano-plugging agents have become the key to efficiently extracting shale gas, which is a clean energy source. Poly(St-(1-Octene)-EGDMA) was synthesized by emulsion polymerization of 1-octene, styrene (St), and ethylene dimethacrylate (EGDMA). Fourier transform infrared spectroscopy, laser scattering, thermogravimetric analysis, scanning electron microscopy (SEM), pressure transfer experiment, and artificial mud cake plugging experiments were used to characterize poly(St-(1-Octene)-EGDMA). The results indicate that poly(St-(1-Octene)-EGDMA) has a particle size of 38.8 nm. After 16 h at 180 °C, the particle size is 49 nm. Based on thermogravimetric analysis, poly(St-(1-Octene)-EGDMA) can tolerate temperatures up to 394 °C, demonstrating excellent high-temperature stability. The rheology of the drilling fluid remains unaltered by poly(St-(1-octene)-EGDMA). With the addition of 2% poly(St-(1-octene)-EGDMA) water-based drilling fluid, the permeability decreased to 2.4 × 10–3 mD and the blocking rate increased to 50%. Simulations are performed with Ansys Fluent 19.2 to verify the experimental results. The potential plugging mechanism of poly(St-(1-Octene)-EGDMA) as a plugging agent was explored. Shale nanopores and nanofractures are invaded by poly(St-(1-Octene)-EGDMA) under pressure. Shale nanopores and nanofractures are plugged by poly(St-(1-Octene)-EGDMA). In water-based drilling fluids, poly(St-(1-Octene)-EGDMA) has a broad range of applications as a possible nano-plugging agent.
研究领域:
材料科学
·
石油工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）