Journal of Inorganic and Organometallic Polymers and Materials
·
2012
·Vol. 23
·期 2
·393-400
·
IF 1.452
Jiang Hualin,Chen Pinghua,Luo Shenglian,Luo Xubiao,Tu Xinman,Cao Qun,Zhou Yanlei,Zhang Weibo
A novel biocompatible composite Fe 3 O 4 /ZrO 2 /chitosan was synthesized in a simple way and its capacity of dye removal was investigated in this study. The morphology of the material was examined by SEM and TEM and found to be nanosized and spheroidal. Equilibrium adsorption isotherms and dynamic behaviors of the adsorption process were investigated in detail. The material saturated with dye could be regenerated by treatment with strong alkali solution. The composite has high adsorption capacity towards acidic dyes represented by amaranth and tartrazine, and remains intact under conditions that are strongly acidic or alkali. The material has high potential to be applied for the removal of acidic dyes in industrial wastewater in large scale.
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高影响因子
IONICS
·
2012
·Vol. 19
·期 5
·757-762
·
IF 1.288
Ran Ying,Yin Zhoulan,Ding Zhiying,Guo Huajun,Yang Jing
A polymer electrolyte based on the blending of poly(vinylidene fluoride-hexafluoropylene) (PVDF-HFP) and hydroxypropyl methyl cellulose (HPMC) was prepared for the first time. The structure and performance of the gel polymer electrolyte were characterized and measured by X-ray diffraction, Fourier transform infrared, thermogravimetric analysis, scanning electron microscopy, electrochemical impedance spectroscopy, linear sweep voltammetry, and by a charge/discharge test. The results show that the gel polymer electrolyte has the best performance when PVDF-HFP/HPMC ratio ( w / w ) is 4:1. At room temperature, the ionic conductivity can reach 0.38 × 10 −3 S cm −1 , the electrochemical stable window is up to 5.0 V (vs. Li/Li + ), and the half cell of Li/GPE/LiMn 2 O 4 shows high-discharge-specific capacity and good cycling performance.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2015
·Vol. 408
·期 3
·805-814
·
IF 3.436
Ma Liyun,Li Jing,Zhao Juan,Liao Han,Xu Li,Shi Zhi-guo
In the current study, novel featured silica, named penetrable silica, simultaneously containing macropores and mesopores, was immobilized with bovine serum albumin (BSA) via Schiff base method. The obtained BSA-SiO 2 was employed as the high-performance liquid chromatographic (HPLC) stationary phase. Firstly, d - and l -tryptophan were used as probes to investigate the chiral separation ability of the BSA-SiO 2 stationary phase. An excellent enantioseparation factor was obtained up to 4.3 with acceptable stability within at least 1 month. Next, the BSA-SiO 2 stationary phase was applied to study the interaction between imatinib mesylate (IM) and BSA by frontal affinity chromatography. A single type of binding site was found for IM with the immobilized BSA, and the hydrogen-bonding and van der Waals interactions were expected to be contributing interactions based on the thermodynamic studies, and this was a spontaneous process. Compared to the traditional silica for HPLC stationary phase, the proposed penetrable silica microsphere possessed a larger capacity to bond more BSA, minimizing column overloading effects and enhancing enantioseparation ability. In addition, the lower running column back pressure and fast mass transfer were meaningful for the column stability and lifetime. It was a good substrate to immobilize biomolecules for fast chiral resolution and screening drug-protein interactions.
The preparation of BSA-SiO2 column based on the penetrable silica and its application in chiral separation and frontal analysis
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PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2015
·Vol. 308
·期 3
·877-886
·
IF 1.034
Li Shicheng,Wang Xiaoli,Huang Zhaoya,Du Liang,Tan Zhaoyi,Fu Yibei,Wang Xiaolin
The sorption and desorption of uranium(VI) on GMZ bentonite was investigated as functions of contact time, pH, ionic strength, foreign ions, HSs and initial U(VI) using batch experiments. It is revealed that the sorption strongly depended on pH, cations (Li + , Na + and K + ) and anions (CO 3
2− , SO 4
2− and PO 4
3− ). HA benefits the sorption at pH <7.0, while inhibited the sorption at higher pH. Moreover, the hysteresis occurred in the sorption–desorption process in the presence/absence of humic substances. The results could provide data base for the safety assessment of the deep geological disposal repository of high radioactive waste.
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高影响因子
CELLULOSE
·
2015
·Vol. 22
·期 6
·3633-3643
·
IF 3.573
Wu Ronglan,Tian Lingyuan,Wang Wei
We report a study on the synthesis of cellulose-g-poly(methyl methacrylate)/organo-montmorillonite and its application in the removal of 2,4-dichlorophenol (2,4-DCP) from aqueous solution. The nanocomposite of cellulose-g-PMMA/OMMT was synthesized by using atom transfer radical polymerization. We investigated the effects of four reaction parameters on the grafting efficiency and percentage. The nanocomposite was characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, transmission electron microscopy and scanning electron microscopy. The effects of four parameters on the adsorption of 2,4-DCP were studied, which included pH, grafting percentage, adsorbate weight and the initial concentration of 2,4-DCP. Furthermore, adsorption isotherms and kinetics were investigated.
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高影响因子
Science China-Chemistry
·
2015
·Vol. 58
·期 7
·1159-1168
·
IF 1.695
Song Zhiming,Shi Bo,Ding Jianxun,Zhuang Xiuli,Zhang Xiaonan,Fu Changfeng,Chen Xuesi
Complications arising from tendon injury include tendon sheath infection and peritendinous adhesion, in which tendon adhesion often leads to serious motor dysfunction. In this work, the electrospun membranes of poly( L -lactide) (PLA) and poly(ε-caprolactone) (PCL) with different degradation kinetics were used to investigate their efficacy for anti-adhesion toward Achilles tendon repair. Compared with the PCL membrane, the PLA sample showed a faster rate of degradation in 42 d, and all the degradation media (i.e., phosphate-buffered saline) maintained at a constant pH of around 7.4. Meanwhile, the superior biocompatibility of both the PLA and PCL membranes were proved by the in vitro cellular adhesion tests and in vivo histopathological assays. Simultaneously, the PLA membrane was more effective than the PCL sample in decreasing adhesion and promoting functional recovery. Furthermore, the experiment result was further confirmed by hematoxylin-eosin and Masson’s trichrome staining, and type I collagen immunohistochemical analysis. All results revealed that the model treated with the electrospun PLA membrane was obviously better with regard to both anti-adhesion and tendon repair than that in the PCL membrane group. Considering the results of degradation and adhesion prevention efficacy, the electrospun polyester membranes, especially the PLA one, would be applied with fascinating potential in clinical prevention of postoperative tendon adhesion.
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高影响因子
COLLOID AND POLYMER SCIENCE
·
2015
·Vol. 293
·期 7
·2121-2128
·
IF 1.865
Gong Huameng,Xie Zhifei,Liu Mingxing,Sun Honghao,Zhu Hongda,Guo Huiling
In this paper, mesoporous silica nanoparticles (MSNs) functionalized with polyethylene glycol (PEG, Mw = 1000 and 5000 Da) via a disulfide bond linker (named as MSNs-SS-PEG 1000 and MSNs-SS-PEG 5000 , respectively) as the novel drug delivery carrier was successfully synthesized. The particle size, surface structural properties, and pore size of these materials were investigated by dynamic light scattering (DLS), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), nitrogen adsorption–desorption measurements, and X-ray diffraction (XRD). Both MSNs-SS-PEG 1000 and MSNs-SS-PEG 5000 exhibited the spherical particles with an average diameter of about 200 nm, typical micropore structures, and intact pore interconnection. Moreover, the releases of doxorubicin hydrochloride (DOX) from these materials in different concentrations of glutathione (GSH) were investigated. The release of DOX from MSNs-SS-PEG 1000 and MSNs-SS-PEG 5000 revealed the redox-responsive characteristic and the drug release content increased with the increase of GSH concentration. Therefore, MSNs-SS-PEG might be a promising carrier material in delivering anticancer drugs.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2015
·Vol. 50
·期 14
·4914-4925
·
IF 2.371
Cheng Cui,Xia Dandan,Zhang Xiuli,Chen Li,Zhang Qiqing
The therapeutic concentration of cisplatin (CDDP) is usually associated with dose-limiting side effects. To avoid these harmful effects, a biocompatible hydrogel carrier which consisted of poly( N -isopropylacrylamide) and carboxymethyl chitosan was designed to deliver CDDP to the local environment of a solid tumor. The poly( N -isopropylacrylamide)-g-carboxymethyl chitosan hydrogels were synthesized by chemical crosslinking. Scanning electronic microscopy images showed that the hydrogels exhibited a cross-linked structure with the average pore size from 100 to 200 µm. Water contact angles and swelling studies suggested that the hydrogels had good hydrophilicity and the lower critical solution temperature lay in the vicinity of 32 °C. The MTT assays implied that the hydrogels were non-cytotoxic on NIH3T3 cells. In vitro release experiment demonstrated that the release of CDDP was controllable and sustained over a long period. Moreover, the released CDDP retained its anticancer activity on A549 cells. The hydrogels are promising carriers for sustained release of cisplatin.
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2015
·Vol. 17
·期 8
·1-7
·
IF 2.184
Huang Yu,Zhan Zhan,Zhang Xiongzhi,Li Houbin,Huang Chi
The composites of anionic spherical polyelectrolyte brushes/conducing polymer (ASPB/CP) have been successfully prepared by chemical oxidative polymerization of aniline and pyrrole monomers in an acidic medium containing anionic spherical polyelectrolyte brushes. These composites were characterized by field emission scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectrometry, zeta potentials, X-ray photoelectron spectroscopy, and four probe methods. It was found that the poly(aniline- co -pyrrole) was uniformly coated on the surface of ASPB. Besides, the ASPB/CP composites had higher doping level than the pure copolymer after doping with ASPB. Moreover, these composites also showed better solubility and storage stability than pure copolymer. The electrical conductivity of the ASPB/CP composites at room temperature was 7.2 S/cm, while it was 2.4 S/cm for the pure copolymer under the same circumstances.
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高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2015
·Vol. 49
·期 4
·755-767
·
IF 1.92
Hui Bin,Li Guoliang,Han Guanghui,Li Yingying,Wang Lijuan,Li Jian
Using chitosan (CS)-modified wood as a scaffold, a magnetic surface was constructed via a simple in situ synthesis method in this paper. The effects of iron ions concentrations on crystalline structure and magnetic properties of the composite were investigated. The composites were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometer (VSM). SEM analysis revealed that the iron oxide particles uniformly deposited on the wood surface. The mineralogy of iron oxide was identified by XRD and XPS analysis as the spinel phase magnetite. In addition, the CS acted as a bridge linking the magnetite coating and wood substrates, which is a key factor for the formation of their strong bonding forces. VSM measurement indicated that the as-synthesized composites were magnetically soft at room temperature, and the saturation magnetizations M
s increased from 14.07 to 57.46 memu, the remanence magnetization M
r increased from 0.57 to 2.77 memu, and the coercivity H
c decreased from 17.02 to 14.29 Oe with an increase in iron ions concentration from 0.4 to 2.0 mol/L. The magnetic property of the composites was easily tailored by adjusting the iron ion concentration, thus providing novel applications of the natural resources wood.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2014
·Vol. 16
·期 11
·1-13
·
IF 2.278
Liu Wenjuan,Yao Jun,Cai Minmin,Chai Hankuai,Zhang Chi,Sun Jingjing,Chandankere Radhika,Masakorala Kanaji
A new nanopesticide, carboxymethyl-β-cyclodextrin-Fe 3 O 4 magnetic nanoparticles-Diuron (CM-β-CD-MNPs-Diuron), was synthesized from an inclusion complex of CM-β-CD-MNPs as host and diuron as guest molecules. The transmission electron microscopy revealed it had an average diameter of 25 nm which is more or less the same as that of MNPs (average diameter ~23 nm). The CM-β-CD grafting was confirmed by infrared spectroscopy, and the amount of CM-β-CD grafted on the surface of MNPs was determined to be 144.1 mg/g by thermogravimetry. The feasibility of using CM-β-CD-MNPs as a nanocarrier for loading diuron was verified by investigating the formation of inclusion complex. The complexation of CM-β-CD-MNPs with diuron followed the Langmuir adsorption isotherm. In this work, the potential toxic effect of CM-β-CD-MNPs-Diuron on soil microbial was evaluated by microcalorimetry, urease enzyme and real-time quantitative PCR (qPCR). The thermokinetic parameters were observed to decrease with increase in the loading of CM-β-CD-MNPs-Diuron in soil. The urease activity data showed that there was a significant effect ( p < 0.05) of CM-β-CD-MNPs-Diuron on the enzyme activity. The microcalorimetric analysis was in agreement with qPCR, confirming the toxic effect of this nanopesticide on microorganism in soil.
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2014
·Vol. 29
·期 5
·1090-1097
·
IF 0.422
Tang Yimei,Hu Xiaoling,Guan Ping,Li Xiaoqian,Tian Tian
Several 1-vinyl-3-alkylimidazolium halogens [VRIM]X, which are functional materials with ethylenic bonds, were synthesized using the microwave-assisted synthesis method. Fourier transform infrared spectroscopy and 1H nuclear magnetic resonance spectroscopy were carried out to analyze the resultant structures. The electrochemical properties and solubility of [VRIM]Br were investigated and discussed in detail. The temperature dependence of pure [VRIM]Br over a wide temperature range of 298.15–323.15 K fitted the Arrhenius equation well. At certain low concentrations, the electrical conductivity of the [VRIM]Br solution significantly increased with increasing solution concentration. The electrical conductivities of the [VRIM]Br observed in water, methanol, and ethanol showed the trend σ
water > σ
methanol > σ
ethanol . Conductometry showed that the critical micelle concentrations of the bromines in water, methanol, and ethanol were 6.8–6.9 × 10 −6 , 1.4–1.5 × 10 −5 , and 1.9–2.0×10 −5 mol·L −1 , respectively; these results indicate that [VRIM]Br is an excellent surfactant. The solubility of [VRIM]X in common solvents was determined at 293.15 K, and results indicated that a decrease in solubility could be observed with decreasing dielectric constant of the solvent, elongation of the alkyl chain of the cation, and increasing anion size. Solubility parameters were also determined according to the Hildebrand-Scoff equation.
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