JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2012
·Vol. 50
·期 24
·5177-5184
·
IF 3.919
Yonggang Gao,Lin Gu,Yusheng Qin,Xianhong Wang,Fosong Wang
Low-molecular weight oligo(carbonate-ether) diols are important raw materials for polyurethane formation, which with tunable carbonate unit content (CU) may endow new thermal and mechanical performances to polyurethane. Herein, facile synthesis of oligo(carbonate-ether) diols with number average molecular weight ( M n ) below 2000 g mol −1 and CU tunable between 40% and 75% are realized in high activity by immortal copolymerization of CO 2 /propylene oxide (PO) using zinc-cobalt double metal cyanide complex (Zn-Co-DMCC) in the presence of sebacic acid (SA). M n of the oligomer is in good linear relationship to the mole ratio of PO and SA (PO/SA) and hence can be precisely controlled by adjusting PO/SA. Besides, the molecular weight distribution is quite narrow due to the rapid reversible chain transfer in the immortal copolymerization. High pressure and low temperature are favorable for raising CU. In all the reactions, the weight fraction of propylene carbonate ( W PC ) can even be controlled as low as 2.0 wt %, and the catalytic activity of Zn-Co-DMCC is above 1.0 kgg −1 cat. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
研究领域:
高分子化学
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催化化学
·
绿色化学
·
功能材料
·
聚合物合成
·
二氧化碳利用
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shiqi Sun,Yanjun Chen,Qiang Bai,Zhen Tian,Que Huang,Changcheng Liu,Shengnan He,Yaxiong Yang,Yanzhong Wang,Li Guo
Researchers are accustomed to utilizing traditional solid-state and sol–gel routes to synthesize Na 3 V 2 (PO 4 ) 3 (NVP). No regulation mechanism is proposed to illustrate the growth process of NVP in solvothermal environment. In current work, uniform spherical particles with positive charge are synthesized by molecular self-assembly of nanosphere micelles using structural guiding agent polyethylene glycol (PEG) and surfactant Cetyltrimethylammonium bromide (CTAB). Nanoflower-shaped NVP sample is successfully prepared in the 100 % methyl alcohol medium, derived from the plate V 2 O 5 (negative charge) combining with the nuclear nanospheres (positive charge) with the induction of electrostatic attraction. Based on the multi-dimensional tests and molecular dynamic calculation, the protective mechanism of polar solution for NVP system is proposed for the first time, that is, methanol solvent system can better protect the morphological features of NVP than water environment to maintain the original special nanoflower morphology. Due to the distinctive and stabilized nanoflower construction, the optimized NVP60 sample can provide more extra active sites for the efficient de-intercalation of Na + and possess a large contacting area with electrolyte, resulting in the facilitated kinetic characteristics and superior electrochemical performance. The optimized NVP60 cathode possesses superior sodium storage property in both half cell and full cell. This work proposes a synergetic strategy combining theory and experiment to design and synthesize the modified NVP-based cathode materials from the molecular bonding aspect, further promoting the development of high performance cathode for SIBs.
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
·
无机化学
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计算材料学
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电池技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Huiqiang Wang,Zhanfang Ma
A new strategy for signal amplification was introduced in a label-free amperometric immunoassay platform. Improvements in the signal occurred following the oxidation of glucose by glucose oxidase and catalysis by polythionine of the produced H 2 O 2 from the previous oxidation reaction. In addition, a multifunctional conductive hydrogel, polypyrrole-polythionine-gold with glucose oxidase , was synthesised with a one-pot method using pyrrole and thionine as monomers, ammonium persulfate and HAuCl 4 as co-oxidant agents, and glucose oxidase as the doping agent. Combined with the hydrogel, a label-free amperometric immunoassay for the tumour marker neuron-specific enolase (NSE) was obtained. If operated at 0 V (vs. Ag/AgCl), the sensor exhibited a wide liner range from 100 ng mL −1 to 1 pg mL −1 and ultralow detection limit of 0.65 pg mL −1 (S/N = 3). The presented method was further used for the analysis of human serum samples and showed good consistency with detection results from an electrochemiluminescence immunoassay.
研究领域:
肿瘤学
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免疫学
·
生物传感器
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分子诊断
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转化医学
·
临床检验医学
·
纳米生物技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Peng Wen,Yuan-Yuan Yang,Wen-Jia Yin,Jian-Cheng Hu,Yu-Dong Shen,Yu Wang,Zhen-Lin Xu,Zhi-Li Xiao,Hong-Tao Lei,Jin-Yi Yang,Hong Wang,Bruce D. Hammock
19-nortestosterone (19-NT), being regarded as the residual marker of banned synthetic steroid hormone nandrolone phenylpropionate , could cause adverse effects when consumed by human. To ensure food safety and minimize 19-NT toxicity, herein, an innovative electrochemical immunosensor for detection of 19-NT was constructed based on the modified polyvinyl alcohol/polyacrylic acid (PVA/PAA) nanofiber mat (NFM). The detection was achieved via a direct competition for binding to horse radish peroxidase-tagged anti-19-NT nanobody between free 19-NT and the 19-NT-ovalbumin covalently immobilized onto the NFM, and the amperometric response of immunosensor was analyzed using cyclic voltammetry . Under the optimal preparation conditions, the PVA/PAA NFM with appropriate hydrophilicity and ultra-high surface was obtained and characterized, and its electrochemical performance exhibited a 20-times increased response compared to the PVA/PAA casting membrane. The established immunosensor possessed high sensitivity towards 19-NT with a detection limit of 2.14 pg/mL, a 46-fold times lower compared to the traditional ic-ELISA of pure anti-19-NT nanobody. Recovery rates from the spiked animal urine samples ranged from 97.09 % to 117.32 %. Moreover, the sensor showed good reproducibility and stability over 6 weeks, suggesting that the nanofiber-based biosensor is a promising alternative for the fast and sensitive determination of 19-NT.
研究领域:
分析化学
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食品安全
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生物传感器
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免疫学
·
环境与健康
·
药物残留检测
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 46
·期 6
·1803-1810
·
IF 4.177
Ganesan Anandhababu,Syed Comail Abbas,Jiangquan Lv,Kui Ding,Qin Liu,Dickson D. Babu,Yiyin Huang,Jiafang Xie,Maoxiang Wu,Yaobing Wang
Progress in the development of efficient electrocatalysts for oxygen reduction reactions is imperative for various energy systems such as metal–air batteries and fuel cells. In this paper, an innovative porous two-dimensional (2D) poly-iron–phthalocyanine (PFe–Pc) based oxygen reduction electrocatalyst created with a simple solid-state chemical reaction without pyrolysis is reported. In this strategy, silicon dioxide nanoparticles play a pivotal role in preserving the Fe–N4 structure during the polymerization process and thereby assist in the development of a porous structure. The new polymerized phthalocyanine electrocatalyst with tuned porous structure, improved specific surface area and more exposed catalytic active sites via the 2D structure shows an excellent performance towards an oxygen reduction reaction in alkaline media. The onset potential (E = 1.033 V) and limiting current density (I = 5.58 mA cm−2) are much better than those obtained with the commercial 20% platinum/carbon electrocatalyst (1.046 V and 4.89 mA cm−2) and also show better stability and tolerance to methanol crossover. For practical applications, a zinc–air (Zn–air) battery and methanol fuel cell equipped with the PFe–Pc electrocatalyst as an air cathode reveal a high open circuit voltage and maximum power output (1.0 V and 23.6 mW cm−2 for a methanol fuel cell, and 1.6 V and 192 mW cm−2 for the liquid Zn–air battery). In addition, using the PFe–Pc electrocatalyst as an air cathode in a flexible cable-type Zn–air battery exhibits excellent performance with an open-circuit voltage of 1.409 V. This novel porous 2D PFe–Pc has been designed logically using a new, simple strategy with ultrahigh electrochemical performances in Zn–air batteries and methanol fuel cell applications.
研究领域:
电化学
·
能源材料
·
催化化学
·
纳米材料
·
金属-空气电池
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燃料电池
·
功能高分子材料
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2016
·Vol. 8
·期 7
·1399-1409
·
IF 4.724
Juan Yang,Xiaoxiao Shen,Yingjie Li,Linyan Bian,Jun Dai,Dongsheng Yuan
The selective conversion of alcohol into aldehyde in water was achieved over Bi 2 WO 6 -reduced graphene oxide (RGO) photocatalysts. The Bi 2 WO 6 -RGO-H catalysts were synthesized by an electrostatic self-assembly method followed by hydrothermal reduction. It was found the valence band and conduction band edges of Bi 2 WO 6 -RGO-H underwent a continuous increase in energy with the increasing weight ratio of graphene oxide, which resulted in a high selectivity to aldehydes. Furthermore, Bi 2 WO 6 -RGO samples with different degrees of reduction of RGO were prepared, and the conversion of alcohol was influenced greatly by the RGO reduction degree. Based on the results of photo-electrochemistry and photoluminescence spectroscopy, the clear enhancement in alcohol conversion can be ascribed to the efficient separation of photogenerated charge carriers, which results from the fast migration of photoelectrons between excited Bi 2 WO 6 and highly reduced RGO. Additionally, based on the results of radical-trapping and ESR spectroscopy, the primary reactive species and a plausible pathway for alcohol oxidation over Bi 2 WO 6 -RGO were proposed. Graphical Green synthesis : Highly selective and efficient conversions of alcohols into aldehydes can be achieved in aqueous suspensions of Bi 2 WO 6 -reduced graphene oxide (RGO) under artificial solar light irradiation. The selectivity to the product aldehydes can be tuned with the weight ratios of graphene oxide, and the conversion of reactant alcohols can be controlled by the reduction degree of RGO.
研究领域:
光催化化学
·
纳米材料科学
·
环境功能材料
·
绿色合成
·
有机转化催化
·
半导体光催化剂
·
界面电荷传输
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DOI
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2012
·Vol. 50
·期 23
·4871-4878
·
IF 3.919
Lijun Fan,Hou Chen,Zhihai Hao,Zhi Tan
A novel high oil-absorbing crosslinked gel was synthesized by copolymerization of butyl methacrylate (BMA) with a small amount of pentaerythritol triacrylate (PETA) crosslinker using single electron transfer-living radical polymerization (SET–LRP) initiated with carbon tetrachloride (CCl 4 ) and catalyzed by Cu(0)/hexamethylenetetramine (HMTA) in N, N-dimethylformamide (DMF). The polymerization followed first-order kinetics as indicated by linear increase of monomer concentration with reaction time. Effects of reaction temperature, crosslinker, initiator, and catalyst on the oil-absorbing properties of the crosslinked gel were investigated in detail. The oil absorptions of the crosslinked gel to chloroform, toluene could reach 51.9, 34.5 g/g, respectively. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
研究领域:
高分子化学
·
功能材料
·
环境修复
·
石油泄漏处理
·
聚合物科学
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2018
·
IF 5.08
Lili Guo,Dazhuang Xu,Long Huang,Meiying Liu,Hongye Huang,Jianwen Tian,Ruming Jiang,Yuanqing Wen,Xiaoyong Zhang,Yen Wei
Supramolecular polymerization is a novel method for the fabrication of multifunctional polymeric composites that mainly relied on the non-covalent interactions between different components. In this work, a novel and facile strategy has been developed for the construction of fluorescent organic nanoparticles (FONs) with aggregation-induced emission (AIE) characteristic based on the host-guest interaction between β cyclodextrin terminating polyethylene glycol (β-CD-PEG) and adamantine (Ad) containing AIE dye (Ph-Ad). Through the host-guest interaction, the fluorescent amphiphiles can be facilely obtained. The characterization results suggested we have successfully prepared the AIE-active FONs through the supramolecular polymerization. The Ph-Ad/β-CD-PEG FONs possess many advantages such small size, high water dispersibility, desirable fluorescence properties, low cytotoxicity and efficient cell dyeing performance. All of the above results implied that these AIE-active supramolecular assemblies should be promising luminescent probes with great potential for different biomedical applications.
研究领域:
生物材料
·
纳米医学
·
分子影像学
·
化学生物学
·
药物递送系统
✓ 已验证
DOI
高影响因子
THERMOCHIMICA ACTA
·
2016
·
IF 1.938
Lipeng Wang,Fucheng Zhang,Yongping Bai,Liping Ding
The kinetic of non-isothermal crystallization of Poly (ethylene terephthalate-co-sodium-5-sulfo- iso -phthalate) (PETI) was investigated using differential scanning calorimetry (DSC). Various macrokinetic models namely the Avrami, Tobin, Ozawa, and Ziabicki were used to describe the non-isothermal crystallization process of PETI. Both of the Avrami crystallization rate constant and the Tobin crystallization rate constant were observed to increase with increasing cooling rate. The Avrami model is better than the Tobin model to describe the non-isothermal crystallization process of PETI. The Ozawa crystallization rate K O was found to decrease with increasing cooling rate, while Ziabicki’s kinetic crystallizability parameter G Z was found to increase with increasing cooling rate. The effective energy barrier △E for non-isothermal crystallization process of PETI, analyzed based on the differential iso-conversional method of Friedman, was found to be an increasing function of the relative crystallinity.
研究领域:
高分子化学
·
材料科学
·
物理化学
·
热分析
·
聚合物结晶
✓ 已验证
DOI
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2015
·
IF 1.648
Zhifei Xie,Huameng Gong,Mingxing Liu,Hongda Zhu,Honghao Sun
In this paper, a novel drug-loaded material (MSNs-SS-PEG) was obtained by grafting the thiol-linked methoxy polyethylene glycol (MeOPEG-SH) onto the thiol-functionalized mesoporous silica nanoparticles (MSNs-SH) via the disulfide bond linker. In our designed experiment, three different chain lengths of PEG (PEG1000, PEG5000, and PEG1000-PEG5000) were used. The silica materials were characterized by Fourier transform infrared spectroscopy (FT-IR), dynamic light scattering, field emission scanning electron microscopy, transmission electron microscopy, nitrogen adsorption–desorption measurements, and X-ray diffraction. The morphology of the MSNs-SS-PEG was spherical with an average diameter of about 150 nm. Due to the covalent modification of hydrophilic MeOPEG, the MSNs-SS-PEG was coated by a thin polymer shell, showing stable and inerratic MCM-41 type mesoporous structure as well as high specific surface areas and large pore volumes. Moreover, the releases of doxorubicin hydrochloride (DOX) from these materials at 10 mM of glutathione were investigated. The PEG functionalization could effectively cap drugs in the mesoporous channels. The release of DOX from the MSNs-SS-PEGn revealed redox-responsive characteristic. The obtained results showed that the MSNs-SS-PEG might be promising drug delivery carrier materials, which could play an important role in the development of drug delivery.
研究领域:
纳米医学
·
药剂学
·
生物材料
·
药物递送
·
分子影像
·
肿瘤治疗
·
转化医学
✓ 已验证
DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2025
·
IF 2.5
Yang Yang,Hua Xie,Bi Zhou,Yuling Liu,Jiqing Hao
A single drug therapeutic approach fails to sufficiently eliminate tumors in clinics, owing to the tumoral complexity and heterogeneity. The integration of chemotherapy with novel treatment modalities offers a promising synergistic strategy for enhancing therapeutic outcomes. Herein, we successfully develop pH-triggered dynamic organic nanocomposite hydrogels for enhanced local tumor combination therapy, which are prepared through incorporation of Cu2-xSe nanoparticles (NPs) and lipophilic mixture (OPC) including orthoester compound, polycaprolactone and carboplatin into imine-crosslinked polysaccharide-based hydrogels. The dynamic imine linkages endow the hydrogels with favorable injectability and self-adaptability as well as tumoral extracellular pH-triggered degradation. OPC can enhance drug escape from hydrogels, tumor penetration and pH-responsive prolonged and sustained release of the drug. Cu2-xSe NPs endow the hydrogels with photothermal therapy (PTT), photodynamic therapy (PDT) and chemo-dynamic therapy (CDT). These superior physicochemical properties result in significant tumor growth inhibition while decreasing side effect on normal tissues. Therefore, the pH-responsive dynamic organic nanocomposite hydrogels have great potential for local tumor therapy in clinics.
研究领域:
肿瘤学
·
生物材料
·
纳米医学
·
药物递送
·
转化医学
·
光热治疗
·
化学动力学治疗
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 42
·24251-24261
·
IF 10.733
Yunyun Zhong,Lei Zhong,Shuanjin Wang,Jiaxiang Qin,Dongmei Han,Shan Ren,Min Xiao,Luyi Sun,Yuezhong Meng
With the rapid development of electronic devices and electric vehicles, the requirements for their safety issues and service stabilities have become more and more strict. Single-ion gel polymer electrolytes exhibit outstanding ion conduction, high safety, good flexibility and a lithium transference number close to unity, leading to extensive research. In this work, a flexible fluorinated polysulfonamide based single-ion polymer electrolyte (SIPE) was synthesized using lithium [(4-styrenesulfonyl)(fluorosulfonyl)imide] (LiSFSI), pentaerythritol tetrakis(3-mercaptopropionate) (PETMP) and pentaerythritol tetraacrylate (PET4A) via one-step in situ photoinitiated thiol–ene click reaction in plasticizers, with electrospun poly(vinylidene fluoride) (PVDF) as the standing membrane. The influence of plasticizer content was investigated and the optimized electrolyte exhibits ultra-high ionic conductivity (5.81 × 10−3 S cm−1 at 28 °C) and a high lithium transference number of 0.91, near to unity. This ionic conductivity is among the highest ionic conductivities exhibited by SIPEs reported to date. Its electrochemical stability window is up to 5.2 V. More importantly, Li/LiFePO4 cells using the prepared SIPE as both the electrolyte and separator displayed high reversible capacity at room temperature. It also exhibits excellent long-term stability and reliability as it maintains a capacity of 140 mA h g−1 at 0.2C rate even after 230 cycles without obvious decay at room temperature.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）