JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Zhenyin Guo,Qingshan Yang,Songhan Wan,Kang Zhu,Hongtao Li,Chen Peng,Xianru He
Ethylene-vinyl acetate (EVM) rubber exhibits relatively poor elasticity, restricting its wide application. The effects of flexible vulcanization agents, ethylene glycol dimethacrylate (EGDMA) and tripropanediol diacrylate (TPGDA), on the mechanical properties and vulcanization characteristics of EVM were studied. At a 3 phr dosage, EGDMA and TPGDA increased elongation at break by 23.5% and 37.0%, respectively, while improving tension set recovery. These agents extended scorch time and reduced optimum vulcanization time. Vulcanization kinetics analysis demonstrated that these two agents shortened vulcanization time, improved production efficiency, and reduced initial reaction temperature (10°C–20°C) and activation energy (7–21 kJ/mol). This study offers a low-cost and simple method to enhance the elasticity and vulcanization properties of EVM and other rubber materials.
研究领域:
高分子科学
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材料工程
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化学工程
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应用化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2023
·
IF 6.1
Simin Chen,Yiqi Qie,Zhendong Hua,Haoyue Zhang,Youmei Wang,Bin Di,Mengxiang Su
Phytocannabinoids and their synthetic analogs (natural and synthetic cannabinoids) are illicit drugs that are widely abused worldwide. Wastewater-based epidemiology (WBE) is an objective approach for the estimation of population-level exposure to a wide range of substances, especially drugs of abuse. However, the concentrations of cannabinoids in wastewater are extremely low (frequently at the levels of nanograms per liter), and the existing pretreatment procedures for wastewater have the disadvantages of time-consumption or low extraction recoveries. This study aimed to propose a novel poly (methacrylic acid- co -ethylene glycol dimethacrylate)-functionalized polydopamine-coated Fe 3 O 4 nanoparticle (Fe 3 O 4 @ [email protected] (MAA- co -EGDMA)) as an adsorbent, and provide a highly sensitive quantitative analytical technique for the detection of five synthetic cannabinoids (SCs: 5 F-EDMB-PINACA, FUB-APINACA, MDMB-4en-PINACA, MDMB-FUBINACA, and PB-22) and one cannabis-related human metabolite (THC-COOH) in wastewater. The magnetic adsorbents were fully characterized by transmission electron microscopy (TEM), infrared spectroscopy (IR), vibrating sample magnetometry (VSM) and X-ray photoelectron spectroscopy (XPS). Subsequently, an MSPE-UHPLC-MS/MS method was developed and validated for the determination of six trace analytes in wastewater. The validation results showed that the method has limits of quantification as low as 0.1–1.0 ng/L. Additionally, the recoveries ranged from 62.81 to 124.02%, and the relative standard deviations (RSDs) of intraday and interday precision were less than 15%. This MSPE-UHPLC-MS/MS method was successfully applied to real wastewater samples, and the whole analytical process of one sample from pretreatment to the obtained quantitative results was completed in less than 30 min. Thus, the proposed method based on Fe 3 O 4 @ [email protected] (MAA- co -EGDMA) is a convenient, rapid, sensitive and reliable method for the determination of trace psychoactive drugs in wastewater.
研究领域:
分析化学
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环境科学
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纳米技术
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药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
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2020
·Vol. 10
·期 42
·25402-25407
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IF 3.119
Xiaodong Lv,Peng Gao
Based on the electron-transfer mechanism between the template and quantum dots (QDs), an optical sensor was structured. It is a phenol sensor, which has the room-temperature phosphorescence (RTP) property of Mn-doped ZnS QDs and high selectivity of molecular imprinted polymers (MIPs). On the surface of the silane modified Mn-doped ZnS QDs, the phenol sensor was prepared by double cross-linker precipitation polymerization in the absence of any stabilizer and additive. Double cross-linkers, divinylbenzene (DVB) and ethyleneglycol dimethacrylate (EGDMA), make a great contribution to the imprinted polymerization with hydrogen-bonding interaction. Then, as a result of the functional monomer, methacrylic acid (MAA), a carboxylic acid was grafted onto the surface of ZnS QDs:Mn@MIPs. Under optimal conditions, the phenol determination experiment had a linear range of 5.0 to 55 μmol L−1 with a correlation coefficient of 0.9984, and a high imprinting factor (IF) of 3.43. In addition, the prepared ZnS QDs:Mn@MIPs were successfully used to detect phenol in real water samples. Therefore, this work provided a highly selective and sensitive RTP probe for phenol determination.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Yi Zou,Wentao Zhao,Shixin Liu,Hui Fang,Lvjin Gao,Yuting Wang,Yinli Su,Li Chen,Zhaolin Liu
Graphical In this study, an innovative AN-based copolymers gel polymer electrolyte is envisaged by introducing a crosslinker-EGDMA and high-strength glass fiber skeleton, which achieves superior electrochemical properties through the synergistic effect between C≡N and C=O. Furthermore, it is facilitated effectively to inhibit the growth of lithium dendrites, which is demonstrated by XPS and SEM. Solid-state lithium-metal batteries (SSLMBs) have attracted great attention due to their outstanding advantages in safety, electrochemical stability and interfacial compatibility. However, the low ionic conductivity and narrow electrochemical window restrict their practical application. Herein, in-situ polymerization electrolytes (IPEs) crosslinked by acrylonitrile (AN) and ethylene glycol dimethacrylate (EGDMA) exhibit the superior ionic conductivity of 1.77×10 −3 S cm −1 at 25 °C, the ultrahigh lithium transference number (tLi+) of 0.784 and the wider electrochemical stable window (ESW) of 5.65 V. The IPEs make the symmetrical Li||Li cells achieve the highly stable lithium stripping/plating cycling for over 3000 h at 0.1 mA cm −2 . Meanwhile, IPE endows the solid-state LiFePO 4 ||Li batteries with an excellent long-cycle performance over 700 cycles at 2.5 C with a capacity retention ratio over 95 %, as well as 1000 cycles at 1 C and superior capacity retention of 85 %. More importantly, the in-situ polymerized electrolytes containing polyacrylonitrile (PAN) open up a new frontier to promote the practical application of solid-state batteries with high safety and high energy density via in-situ solidification technology.
研究领域:
材料科学
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电化学
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电池技术
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聚合物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 17
·6992-7000
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IF 3.288
Tehseen Nawaz,Muhammad Ahmad,Jieying Yu,Shiqi Wang,Tianxin Wei
Novel bifunctional group monomer itaconic acid (IA) based molecularly imprinted polymers (MIPs) were successfully prepared with hydrogen bonding interactions by applying a facile combination of a reversible addition chain transfer mechanism (RAFT) and surface plasmon resonance (SPR). UV photo-polymerization in synergy with 2-methyl-2-[(dodecylsulfanylthiocarbonyl)sulfanyl]propanoic acid (TTCA) as a chain transfer reagent was employed for MIP film synthesis on an SPR sensor chip for the detection of progesterone using ethylene glycol dimethacrylate (EGDMA) as a cross linker. In addition, the ratio of template to bifunctional group monomer to cross linker was optimized (1 : 2 : 12) by real-time SPR monitoring. The modified surface of the biosensor was characterized by contact angle measurements, frontier transfer infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The resulting itaconic acid based MIP (IA based MIP) biosensor showed a high adsorption capacity and excellent selectivity in comparison to other analogues and non-imprinted polymer (NIP) film. Through 8 adsorption–desorption cycles, the high recoverability of IA based MIP film was confirmed. These features suggested that IA based MIPs are ideal candidates for biosensor use owing to the bifunctionality of the monomer. Consequently, within the concentration range of 1 × 10−18 to 1 × 10−8 mol L−1, the coupling angle change of SPR versus the negative logarithm of concentration showed excellent linearity: R2 = 0.99. Based on a linear equation, IA based MIPs showed excellent values for the limit of detection (LOD) and limit of quantification (LOQ), i.e. 0.28 × 10−19 mol L−1 and 0.92 × 10−19 mol L−1, respectively. Furthermore, the influence of the matrix on the biosensor was successfully analyzed in real samples with satisfactory outcomes, displaying identical behavior to ideal samples. Hence, IA based MIPs in combination with an SPR sensor chip demonstrated potential applications for rapid and highly effective sensing even in complicated matrices.
研究领域:
分析化学
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生物传感器
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高分子科学
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材料科学
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生物技术
✓ 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）