POLYMER INTERNATIONAL
·
2024
·
IF 2.9
Wangui Peng,Weihong Huang,Minmin Gao,Wenming Yang,Wanzhen Xu
Sulfamethymidine, a sulfonamide commonly employed, is introduced into the human body through the food chain, posing a threat to human health. Consequently, the development of a rapid and efficient detection technique becomes imperative. In this investigation, a photoresponsive sulfamemethyridiazine imprinted polymer was synthesized to etch a silicon core, thereby effectively addressing the limitations encountered with conventional molecularly imprinted polymers, including diminished binding capacity, restricted site accessibility, and sluggish binding kinetics. The photosensitive monomer utilized in the molecularly imprinted polymers (MIPs) is 5[(4 (methylacryloxy) phenyl) diazene] mphthalic acid, which exhibits a stimulating reaction mechanism. The N=N bond undergoes photoisomerization, transitioning between trans and cis configurations. The adsorption experiment provides additional evidence that the hollow molecularly imprinted polymers exhibit a higher adsorption capacity, achieving a value of 0.192 mmol L −1 . The experiments conducted to assess selectivity and repeatability confirm that the photoresponsive MIPs exhibit a high level of selectivity and favorable repeatability. Following four cycles, the adsorption rate consistently remains at 64.3%. After undergoing four cycles, the adsorption rate remains consistently at 64.3%. Additionally, the recoveries of the actual samples ranged from 95.6% to 99.7%. This finding presents a novel approach to detecting the concentration of trace pollutants in intricate substrates. This article is protected by copyright. All rights reserved.
研究领域:
分析化学
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环境科学
·
药学
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DOI
高影响因子
POLYMER INTERNATIONAL
·
2023
·Vol. 72
·期 6
·586-596
·
IF 3.2
Fangping Liang,Wurong Li,Mingao Li,Xican Li,Jianfeng He,Quanzhou Wu
In this work, kaempferol molecularly imprinted polymers (MIPs) were screened in detail and were applied to the separation of kaempferol from real complex systems. Kaempferol-MIPs with high affinity and selectivity for kaempferol could be prepared successfully by using kaempferol as the template molecule, 4-vinylpyridine as the functional monomer, ethylene glycol dimethacrylate or divinylbenzene as the crosslinker, acetone or acetonitrile as the solvent. Scanning electron microscopy observation and Brunauer–Emmett–Teller measurement showed that the prepared MIPs had a heterogeneous pore structure and large specific surface area. Static and dynamic adsorption experiments and solid-phase extraction application were performed to evaluate the performance of the prepared MIPs. Only the MIPs with both higher distribution coefficient and higher imprinting factor in the dynamic experiments had better ability to retain kaempferol. Using the screened MIPs as solid-phase extraction sorbents, kaempferol and quercetin were extracted directly from the crude ginkgo leaves hydrolysate with high recovery and purity. Control experiments also showed that the screened MIPs were superior to commercially available adsorbents in terms of the separation of kaempferol from crude extracts. © 2023 Society of Industrial Chemistry.
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高影响因子
POLYMER INTERNATIONAL
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2016
·Vol. 65
·期 12
·1382-1386
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IF 2.414
Yu Guan,Jingjing Li,Leishan Shao,Fei Wang,Dongyu Dong,Yinghan Wang
A new redox initiation system, potassium persulfate/ N , N -dimethylethanolamine, was used to initiate traditional radical emulsion polymerization of vinyl acetate at low temperature. Polymers were characterized using gel permeation chromatography, scanning electron microscopy and dynamic light scattering. The results showed that poly(vinyl acetate) with high molar mass and small dispersity (Đ) was successfully synthesized. © 2016 Society of Chemical Industry
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
POLYMER INTERNATIONAL
·
2016
·Vol. 65
·期 10
·1150-1156
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IF 2.414
Lu Shen,Ying Wang,Qiang Zhao,Fubin Luo,Junhua Chen,Mangeng Lu,Liyan Liang,Kun Wu,Jun Shi
The dimethacrylate reactive diluent (HEMA-DDSA), a long-side-chain-containing reactive diluent, was prepared by reacting 2-dodecen-1-ylsuccinic anhydride with two equivalents of hydroxyethyl methacrylate. Its structure was characterized by IR and 1 H NMR spectroscopy. This new diluent was added into the formulation of UV-curable epoxy acrylate networks. Results show that the formulation with the addition of HEMA-DDSA has massively reduced viscosity and shows several attractive properties of epoxy acrylate oligomers. The mechanical resistance of the films is dramatically enhanced with the incorporation of long alkyl groups derived from HEMA-DDSA, the plastic deformation zone expands, thus decreasing the inner stress of the polymer structure. Moreover, the cured coatings have a higher glass transition temperature as the percentage of HEMA-DDSA is increased up to 5 wt%. Due to the excellent integrated performance of the polymeric films, HEMA-DDSA proved to be an effective reactive diluent, which is of potential interest for applications in high performance materials. © 2016 Society of Chemical Industry
研究领域:
材料科学
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高分子化学
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DOI
高影响因子
POLYMER INTERNATIONAL
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2016
·Vol. 65
·期 10
·1172-1178
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IF 2.414
Shuyan Yang,Wenjian Wu,Yuanqi Jiao,Hongbo Fan,Zhuodi Cai
The plasticizing and thermostabilizing effect of poly(ethylene glycol)–polyhedral oligomeric silsesquioxane (PEG-POSS) on poly(vinyl chloride) (PVC) is discussed thoroughly in this work. As PEG-POSS content increases, PVC becomes more flexible and the decomposition temperature of PVC increases slightly. Meanwhile, the temperature of maximum HCl emission is elevated from 265.3 °C in neat PVC to 285.7 °C in PVC nanocomposites, with the peak intensity of HCl emission decreased by 30.8%, and a new lower intensity of HCl emission peak appearing at much higher temperature (around 370 °C), which is in accordance with the maximum degradation temperature of PEG-POSS. Thereby, a possible dehydrochlorination mechanism is suggested according to the fact that the electron donor effect of ether groups would stabilize the C Cl bonds by means of more electron cloud stacked in those bonds, which agrees with Fourier transform infrared and X-ray photoelectron spectroscopy experiments in terms of hydrogen bonds. © 2016 Society of Chemical Industry
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高影响因子
POLYMER INTERNATIONAL
·
2013
·Vol. 63
·期 4
·626-632
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IF 2.125
Weihua Zhou,Jiangman Shi,Shuaishuai Yuan,Yiwang Chen
A series of novel poly[(butylene succinate)- co -diolisobutyl]-[ polyhedral oligomeric silsesquioxane] (PBS-POSS) copolyesters have been synthesized for the first time directly from diacid and diols via melting polycondensation. Both PBS and POSS segments crystallized as revealed by X-ray diffraction, and the crystallization of PBS was found to be retarded by the incorporation of POSS into PBS chains based on differential scanning calorimetry and rheological results. Moreover, the copolyester containing 3 mol% POSS formed organogels in chloroform by the treatment of shear flow and was more thermally stable than the pristine sample, due to formation of a physically crosslinked network caused by the crystallization of POSS into crystals of larger sizes. © 2013 Society of Chemical Industry
研究领域:
材料科学
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高分子化学
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DOI
高影响因子
POLYMER INTERNATIONAL
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2014
·Vol. 63
·期 9
·1691-1698
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IF 2.247
Tian Lan,Wenjie Yang,Juan Peng,Mingke Li,Yinghan Wang
A type of graft macroinitiator, synthesized by reversible addition–fragmentation chain transfer (RAFT) and atom transfer radical polymerization, was employed to prepare polymer-dispersed liquid crystals (PDLCs) with graft copolymer matrix; meanwhile, a linear macroinitiator was also synthesized via RAFT polymerization. The effect of linear and graft macroinitiators on the electro-optical (EO) properties of the PDLCs was investigated. The results showed that the graft macroinitiator could make a large difference to the EO properties of the PDLCs. The memory effect was reduced remarkably, but the driving voltage increased and transmittance decreased. A possible mechanism is presented. © 2014 Society of Chemical Industry
研究领域:
材料科学
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高分子化学
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液晶技术
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DOI
高影响因子
POLYMER INTERNATIONAL
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2014
·Vol. 63
·期 10
·1875-1880
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IF 2.247
Chunfang Li,Zhupeng Zhang,Jinrong Wu,Dongxiang Li,Wanguo Hou
Dendritic amphiphiles as novel building blocks are very important for self-assembling in the supramolecular chemistry area. In this work, a carbosilane dendrimer with hexamethylene as the branching unit (G1) was first synthesized as a hydrophobic core and then linked with poly(ethylene glycol) (PEG) units as the periphery by a hydrosilylation reaction to prepare an amphiphilic dendrimer (G1-PEG) with a yield of 27%. The aggregation behavior of G1-PEG in water was studied with surface tension, dynamic light scattering and transmission electron microscopy methods. The surface tension data showed that the critical aggregation concentration of such dendrimers in water is approximately 0.75 g L −1 . The results of dynamic light scattering and transmission electron microscopy indicated that the aggregate size of G1-PEG dendrimers in water is related to the concentration. Small micelles of about 10 nm were found at high concentration, large vesicles of about 100 nm were observed at low concentration, and a mixture of micelles and vesicles was found at middle concentrations. The encapsulation of G1-PEG to a fluorescence probe verified the existence of a hydrophobic microenvironment in the aggregates at high concentrations of the amphiphilic dendrimer. © 2014 Society of Chemical Industry
研究领域:
超分子化学
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材料科学
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DOI
高影响因子
POLYMER INTERNATIONAL
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2018
·Vol. 67
·期 8
·1003-1010
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IF 2.352
Yangyang Wang,Zhiping Zhou,Wanzhen Xu,Yu Luan,Yi Lu,Yanfei Yang,Tianshu Liu,SongJun Li,Wenming Yang
This work describes the preparation of molecularly imprinted polymers using ZnO quantum dots, which were used for the selective detection of diethylhexyl phthalate (DEHP). Methacrylic acid, ethylene glycol dimethacrylate, 2,2′-azobis(2-methylpropionitrile) and ZnO were used as functional monomer, crosslinker, initiator and optical material, respectively. Molecularly imprinted polymers were successfully synthesized, and the linear relationship between fluorescence intensity and amount was from 0.5 to 40 µmol L −1 for DEHP. The coefficient of correlation was 0.9923 and the imprinting factor was 11.16. The results were above 97.50% and relative standard deviation below 3.86% for the detection of DEPH in actual water samples. This study could provide a novel method using molecularly imprinted polymers for highly selective and sensitive detection of DEHP. © 2018 Society of Chemical Industry
研究领域:
分析化学
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环境科学
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DOI
高影响因子
POLYMER INTERNATIONAL
·
2018
·Vol. 67
·期 9
·1186-1193
·
IF 2.352
Dengcheng Huang,Yu Zhou,Yuan Xiang,Meijie Shu,Hongxiang Chen,Bing Yang,Xinghua Liao
In order to obtain a pH-sensitive delivery carrier for doxorubicin (DOX), DOX-loaded polyurethane (PU·DOX) nanoparticles were readily prepared in water by electrostatic interactions between amphiphilic polyurethane with carboxyl pendent groups (PU-COOH) and doxorubicin hydrochloride (DOX·HCl). The structures of the products obtained were characterized by Fourier transform infrared spectroscopy, 1 H NMR spectroscopy, gel permeation chromatography, UV–visible spectroscopy, dynamic light scattering and transmission electron microscopy. The average hydrodynamic size of the PU·DOX nanoparticles was around 182 nm with negative surface charge (−1.1 mV) and a spherical or rodlike shape. PU·DOX nanoparticles had a higher drug-loading content of 14.1 wt%. The in vitro drug release properties of PU·DOX nanoparticles were investigated at pH 4.0, 5.0 and 7.4, respectively. PU·DOX nanoparticles exhibited a good pH-sensitive drug release property, but there was almost no release of DOX from PU·DOX nanoparticles at pH 7.4. The in vitro cellular uptake assay and the Cell Counting Kit-8 assay demonstrated that PU·DOX nanoparticles had a higher level of cellular internalization and higher inhibitory effects on the proliferation of human breast cancer (MCF-7) cells than pure DOX. The enhancement of the inhibition effects resulted from increasing apoptosis-inducing effects on MCF-7 cells, which was related to the enhancement of Bax expression and the reduction of Bcl-2 expression confirmed by terminal deoxynucleotidyl transferase mediated dUTP nick end labeling (TUNEL) assay, real-time polymerase chain reaction (PCR) assay and western blot assay. © 2018 Society of Chemical Industry
研究领域:
药学
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纳米技术
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癌症研究
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生物医学工程
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产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
·
2023
·
IF 3.2
Qiaolin Tang,Lu Yuan,Ming Kang,Ying Huang,Li Yang,Qiang Yin,Guanjun Chang
A strong and tough indole-based epoxy film driven by cation– π interaction is designed, evading the trade-off between stiffness and extensibility in epoxy resins. The film with high strength, toughness and effective anti-counterfeiting properties induced by cation– π interaction is promising in the development of the fields of aerospace and electronic devices. © 2023 Society of Industrial Chemistry.
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DOI
高影响因子
POLYMER INTERNATIONAL
·
2023
·
IF 3.2
Chengtao Gao,Yanwen Wang,Yunlong Yang,Shuhao Qin
The design and synthesis of catalysts loaded with active components has attracted considerable attention in current research owing to their exceptional catalytic performance. In this study, the focus was on the utilization of tin-loaded ZA molecular sieves, possessing remarkable adsorption properties, alongside the catalytic activity of tin. These catalysts were successfully prepared and employed for the synthesis of poly(lactic acid) (PLA) from lactic acid derived from non-food biomass. By modifying the treatment of ZA molecular sieves, the properties of tin-loaded ZA molecular sieves were adjusted. The resulting catalysts exhibited a high tin capacity ranging from 2.29% to 2.81% and featured abundant mesoporous structures, providing a surface area of up to 341.2 m 2 g −1 . Regarding the preparation of PLA, our findings demonstrated that ZA-III-Sn 2+ as a catalyst yielded PLA with a higher weight-average molecular weight ( M w ) up to 2.57 × 10 4 g mol −1 and a higher yield of 65.3% compared to other catalysts. Moreover, the most optimal catalytic effect was achieved by adding the catalyst in three separate stages. Moreover, the amount of catalyst, reaction temperature and reaction time were found to influence both the molecular weight and yield of PLA. This study not only provides a valuable strategy for the preparation of loaded catalysts for PLA production but also offers new insights into the overall preparation process of PLA. © 2023 Society of Industrial Chemistry.
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高影响因子
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