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2.070 Aktuelle Fachpublikationen zum Thema temperature

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The direct electrophilic cyanation of [small beta]-keto esters and amides with cyano benziodoxole

25.11.2014 | Yao-Feng Wang; Jiashen Qiu; Dejie Kong; Yongtao Gao; Feipeng Lu; Pran Gopal Karmaker; Fu-Xue Chen, Organic & Biomolecular Chemistry, 2014

The direct electrophilic α-cyanation of β-keto esters and amides has been developed using a hypervalent iodine benziodoxole-derived cyano reagent. The procedure is accomplished within 10 min and without the use of any catalyst in DMF, at room temperature. Thus, the highly functionalized ...

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Surface grafting of carbon fibers with artificial silver‐nanoparticle‐decorated graphene oxide for high‐speed electrical actuation of shape‐memory polymers

22.11.2014 | Haibao Lu, Shipeng Zhu, Yunhua Yang, Wei Min Huang, Jinsong Leng, Shanyi Du, Journal of Applied Polymer Science, 2014

ABSTRACT Poor heat conduction in the interface between the carbon fiber and polymer matrix is a problem in the actuation of shape‐memory polymer (SMP) composites by Joule heating. In this study, we investigated the effectiveness of grafting silver‐nanoparticle‐decorated graphene oxide (GO) ...

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Chemical‐vapor‐sensitive materials based on a multiwalled carbon nanotube/hydroxyl propyl methylcellulose/cellulose composite

22.11.2014 | Kaihua Liu, Beihai He, Liying Qian, Junrong Li, Journal of Applied Polymer Science, 2014

ABSTRACT A type of chemical vapor‐sensing material made from multiwalled carbon nanotubes/hydroxyl propyl methyl cellulose/cellulose composite films were prepared in the room‐temperature ionic liquid 1‐butyl‐3‐methylimidazolium chloride ([BMIm]Cl). A typical negative vapor coefficient was ...

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Defect‐enhanced F– ion conductivity in layer‐structured nanocrystalline BaSnF4 prepared by high‐energy ball milling combined with soft annealing

20.11.2014 | Florian Preishuber‐Pflügl, Viktor Epp, Suliman Nakhal, Martin Lerch, Martin Wilkening, physica status solidi (c), 2014

Abstract Fast ion conductors play one of the most important roles in solid state ionics as there is a great demand for their application in safe and powerful electrochemical energy storage systems. For such materials, it is known that the synthesis conditions may have significant impact on the ...

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Inline Analysis of the Dry Reforming Process through Fourier Transform Infrared Spectroscopy and Use of Nitrogen as an Internal Standard for Online Gas Chromatography Analysis

20.11.2014 | Roland Lee; Raynald Labrecque; Jean-Michel Lavoie, Energy & Fuels, 2014

In this work, Fourier transform infrared spectroscopy (FTIR) was used as a process analytical tool (PAT), allowing for quantification of the output gas from a dry reforming of methane (DRM) reaction. This PAT was correlated with gas chromatography (GC) analysis, where nitrogen was used as an ...

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Effect of strain rate on tensile properties of polyurethane/(multiwalled carbon nanotube) nanocomposite

19.11.2014 | Mohammad Hadi Moghim, Seyed Mojtaba Zebarjad, Journal of Vinyl and Additive Technology, 2014

In this research, polyurethane (PU)/(carbon nanotube) (CNT) samples, with two different contents of multiwalled carbon nanotubes (MWCNTs; i.e., 0.5 and 1.0 wt%) were fabricated through a solution casting method. To investigate the effect of strain rate on tensile properties, tensile tests were ...

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Heterogeneous Carbon Gels: N-Doped Carbon Xerogels from Resorcinol and N-Containing Heterocyclic Aldehydes

19.11.2014 | Wojciech Kiciński; Małgorzata Norek; Bartłomiej J. Jankiewicz, Langmuir, 2014

Direct, acid (HCl) initiated sol–gel polycondensation of resorcinol with pyrrole-2-carboxaldehyde or its derivative N-methyl-2-pyrrolecarboxaldehyde yields thermosetting phenolic organic gels with N-content of up to 8.4 wt %. After carbonization, sturdy monoliths of N-doped carbon xerogels with ...

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An Unexpected Role of Carbon Disulfide: A New and Efficient Method for the Synthesis of 2‐Substituted Benzimidazoles

18.11.2014 | John A. Gladysz, Hamid Reza Safaei, Sara Nouri, Helvetica Chimica Acta, 2014

Abstract A new and efficient methodology for the synthesis of 2‐substituted benzimidazoles is described. In this procedure, CS2 unexpectedly facilitated the cyclization reaction between benzene‐1,2‐diamine and benzenecarbaldehydes in CH2Cl2 at room temperature. The reactions occur under mild ...

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Energies, Vol. 7, Pages 7555-7567: Introducing Textiles as Material of Construction of Ethanol Bioreactors

18.11.2014 | Osadolor, Osagie A.; Lennartsson, Patrik R.; Taherzadeh, Mohammad J., Energies, 2014

The conventional materials for constructing bioreactors for ethanol production are stainless and cladded carbon steel because of the corrosive behaviour of the fermenting media. As an alternative and cheaper material of construction, a novel textile bioreactor was developed and examined. The ...

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Multiwall Carbon Nanotube‐Ionic Liquid Modified Paste Electrode as an Efficient Sensor for the Determination of Diazepam and Oxazepam in Real Samples

17.11.2014 | M. A. Zare, M. Saber Tehrani, S. Waqif Husain, P. Aberoomand Azar, Electroanalysis, 2014

Abstract A carbon‐based electrode using multiwall carbon nanotube as a modifier and room temperature ionic liquid as a binder has been applied for the determination of diazepam (DZP) and oxazepam (OZP) in real samples including serum, urine and tablets. Square wave voltammetry as an ...

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