RSC Advances
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2017
·Vol. 7
·期 58
·36382-36391
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IF 3.108
Xiaobin Lu,Hongguo Zhao,Chunhui Feng,Qian Chen,Zhao Zhang,Chunhua Yang,Xianru He,Xin Wang
In order to improve the compatibility of Fe3O4 particles with ethylene vinyl acetate copolymers (EVA) composite hot melt adhesives (HMAs), Fe3O4 magnetic particles were surface coated with polyvinyl acetate (PVAc). The PVAc-coated Fe3O4 modified EVA composite HMAs were characterized by SEM, DSC, XRD, optical contact angle measuring, infrared dichroism and parallel-plate rheometer measurements. The results showed that Fe3O4 particles were successfully coated by PVAc, leading to better dispersion of the particles in EVA composite HMAs. It was also found that the orientation structure, interfacial property and the flow properties of the modified HMAs were all changed, and the segment orientation degree and crystallinity of the modified EVA composite HMAs clearly increased with the increase of PVAc-coated Fe3O4 particles content. Importantly, the peel strength of the modified HMAs was further enhanced. For the modified HMAs with 15 phr (parts per hundred resins) of PVAc-coated Fe3O4 particles, the peel strength reached 6.6 kN m−1 and was increased by 247% compared with the unmodified HMAs.
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
Micro & Nano Letters
·
2018
·Vol. 13
·期 11
·1556-1559
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IF 0.841
Lihui Yao,Yajuan Wang,Ya Li,Jingkuan Duan
Different Fe 3 O 4 particles are synthesised with silane and carboxylic acid, surface modified by co-precipitation, and subsequently are characterised by Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, laser particle size analyser (LPSA) and thermogravimetric analyser (TG). Based on the LPSA results, Fe 3 O 4 particles are micrometre size due to the experimental condition and modifiers. It is therefore suggested that the vacuum freeze-drying and the long-chain modifiers tend to obtain small size particles. The modifiers density on the surface of Fe 3 O 4 particles is obtained by TG and formula calculation. It is shown that the silane coupling agent is more effective modifier for Fe 3 O 4 particles compared with carboxylic acid. In accordance with the molecular structure and functional group number of carboxylic acids, different carboxylic acids have different modifiers density.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Najing Fu,Liteng Li,Kaijing Liu,Chan Kyung Kim,Jun Li,Tao Zhu,Jianheng Li,Baokun Tang
With the development of deep eutectic solvents (DESs), more DES-based functional materials have been explored and applied in various areas. In this work, a novel choline chloride-acrylic acid (ChCl-AA) DES polymer, on a 2D magnetic base, was prepared for the recognition of β-lactoglobulin (β-LG) biomacromolecules in milk and for the inhibition of common bacteria such as Escherichia coli ( E. coli ), Pseudomonas fluorescens ( P. fluorescens ), Staphylococcus aureus ( S. aureus ), and Bacillus subtilis ( B. subtilis ). The ChCl-AA DESs were polymerized on the surface of 2D MoS 2 sheets doped with nano Fe 3 O 4 particles, and the resulting polymer was abbreviated poly(ChCl-AA DES)@Fe 3 O 4 @MoS 2 . The free energy (ΔG=−92) of ChCl-AA DES was calculated using the Gaussian software, the composition and structure of poly(ChCl-AA DES)@Fe 3 O 4 @MoS 2 were characterized by field emission scanning electron microscopy , transmission electron microscopy , etc ., the qualitative and quantitative analyses of β-LG were done by fluorescence spectra , sodium dodecyl sulfate polyacrylamide gel electrophoresis and high performance liquid chromatography, and the bioactivity of bacteria was analyzed by flat colony counting. Based on the present analysis, poly(ChCl-AA DES)@Fe 3 O 4 @MoS 2 specifically recognized β-LG in a good fitting Langmuir isotherm (R 2 = 0.9909) and second-order kinetic model (R 2 = 0.9989) by affinity, and evidently inhibited three bacteria, namely, E. coil (65%), S. aureus (50%), and B. subtilis (54%), effectively reducing the relative colony number. As the poly(ChCl-AA DES)@Fe 3 O 4 @MoS 2 material did not only exhibit specific recognition of biomacromolecules, but also had an antimicrobial effect against common bacteria, it could be an ideal separation media or carrier for biomacromolecules in real samples.
研究领域:
生物化学
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材料科学
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食品科学
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 134
·期 7
·
IF 1.866
Jie-Ping Fan,Dan-Dan Liao,Yan-Long Xie,Bing Zheng,Jia-Xin Yu,Ya-Hui Cao,Xue-Hong Zhang,Hai-Long Peng
A composite material (MIP@Fe 3 O 4 @GO) based on molecular imprinted polymer (MIP), superparamagnetic Fe 3 O 4 particles and graphene oxide (GO) was prepared by the chemical coprecipitation method, and used to simultaneously separate and enrich two alkaloids (evodiamine and rutaecarpine) in the extract of Evodiae fructus . The as-prepared MIP@Fe 3 O 4 @GO was characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM). The adsorption kinetics, isotherms, competitive adsorption, and reusability of MIP@Fe 3 O 4 @GO were also investigated. The results revealed that MIP@Fe 3 O 4 @GO was sensitive to the magnetic field and could be easily separated using an external magnet; MIP@Fe 3 O 4 @GO showed good recognition selectivity, as well as simultaneous enrichment and separation abilities for evodiamine and rutaecarpine in the extract of E. fructus with satisfactory recoveries. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44465.
研究领域:
材料科学
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药物分析
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中药学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 9
·7539-7550
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IF 2.324
Sui Mingxu,Sun Xiaodong,Lou Hongfei,Li Xiaopeng,Lv Xuliang,Li Ling,Gu Guangxin
Hollow Fe 3 O 4 particles with variable crystal sizes were synthesized by one-step solvothermal method for lightweight and efficient microwave absorber applications. The reactant concentration, reaction temperature and reaction time are three key factors for morphology control of the products and can further influence the microwave absorption properties. The diameters of as-prepared hollow magnetite particles ranged from 200 to 1000 nm, while the shell thickness differed from 35 to 280 nm. It is found that the microwave absorption properties are improved along with the increasing of the hollow structure size which depend on the reaction conditions. The sample prepared at 200 °C for 36 h exhibited an optimal reflection loss of − 55.14 dB at 11.76 GHz with the thickness of 2.07 mm, while possessing the broadest effective bandwidth reaching 4.72 GHz (5.6–10.32 GHz) at 2.49 mm. The excellent microwave absorbing properties of such materials can be attributed to the high magnetic loss and favorable impedance matching property.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Guolong Li,Xi Wang,Di Zhang,Hiroshi Fu,Xiaoming Qian,Zhenxue Liu,Yaming Jiang,Songnan Zhang
Incorporating innovative technology into functional fabrics extends their utility and addresses the daily challenges posed by fabric icing. Identifying effective anti-icing/deicing strategy is essential to mitigate the associated inconveniences. In this study, polypyrrole (PPy), Fe 3 O 4 particles and polydimethylsiloxane (PDMS) are used as the raw materials to design an all-weather anti-icing and deicing functional fabric PDMS/Fe 3 O 4 /PPy@PET, presenting the photothermal/electrothermal and electromagnetic induction thermal functions. This functional fabric exhibits excellent hydrophobic performance with the contact angle of 152° and effectively delayed the droplet freezing for 181 s on a −10 ℃ cold table. The photothermal effect can reach an equilibrium temperature of 74.3 ℃ at 1 sunlight intensity and melt a 3 mm thick ice layer in 841 s. The electrothermal performance reaches to 72.2 ℃ at 10 V voltage and the ice layer is melted within 1436 s. The excellent electromagnetic induction thermal performance can reach to 71.4 ℃ in 5 min at 8 V voltage, and completely melt the ice layer in 444 s. In addition, the fabric offers excellent durability, abrasion resistance and UV resistance, allowing for long-term outdoor use. This opens up new ideas for the development of anti-icing and deicing functional fabric.
研究领域:
材料科学
·
纺织工程
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产品关联
DOI
高影响因子
SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS
·
2019
·Vol. 26
·期 1
·261-269
·
IF 0.705
Xiazhi Zhou,Wei Zhou,Dianchun Ju,Yinxian Peng,Lei Zhou,Sheng Tang,Jing Wang
In this work, hierarchical porous resins (PRs) are fabricated and applied as novel adsorbent for removal of oily substance. The oil/water (o/w) high internal phase emulsions (HIPEs), stabilized by phenolic resin precursor and tween 80, were used as the template for simultaneous polymerization of aqueous phase, methenamine, sodium persulfate and liquid paraffin. Subsequently, dopamine hydrochloride, 1-dodecanethiol and Fe 3 O 4 particles are grafted onto the interface of PRs via adhesion of dopamine and Markel addition reaction between quinone groups on dopamine and sulfhydryl groups on 1-dodecanethiol. The as-prepared composites possessed hydrophobicity and magnetic property (HPRs). The physical and chemical properties, morphology and adsorption properties of HPRs are characterized by XRD, FT-IR, TGA, SEM, N 2 adsorption-desorption isotherms. The as-synthesized HPRs composites had a typical hierarchical porous structure, and the resulted macropores with a well-defined open-cell and interconnecting pore throat structure could be controlled via the composition of the aqueous phase of emulsion. The hierarchical porous structure of HPRs contained macropores ranging from 0.3 μm to 4 μm and mesopores of 11.26 nm. HPRs have rough and hydrophobic surface (water contact angle of 130 ∘ ) with specific surface area of 15.06 m 2 /g and pore volume of 0.0349 cm 3 /g. The oil adsorption rate and the oil retention rate for toluene are 11.765 g/g and 86.43%, respectively. The oil adsorption rate in the first minute can reach more than 80% of the highest oil adsorption rate. The oil adsorption rate of HPRs after three recycling experiments can still reach 87.32%of the first-time oil adsorption rate.
研究领域:
材料科学
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化学工程
·
环境科学
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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）