Results 221 to 230 of about 18,419 (265)
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Deacetylation of konjac glucomannan by mechanochemical treatment
Journal of Applied Polymer Science, 2008AbstractThis article presents the experimental results on deacetylation of a konjac glucomannan (KGM) powder with alkali in mechanochemical (MC) treatment by a dry vibrating mill. It is indicated that the acetyl group of the KGM powder could be removed by means of the MC method.
Zhidong Pan, Ke He, Yanmin Wang
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Modification of Kaolinite Surfaces by Mechanochemical Treatment
Langmuir, 2001Kaolinite surfaces were modified by grinding kaolinite/quartz mixtures with mole fractions of 0.25 kaolinite and 0.75 quartz for periods of time up to 4 h. X-ray diffraction shows the loss of intensity of the d(001) spacing with mechanical treatment resulting in the delamination of the kaolinite. Thermogravimetric analyses show the kaolinite surface is
Frost, Raymond +4 more
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Co and Co2 hydrogenation under mechanochemical treatment
Catalysis Today, 1997Abstract The effect of mechanochemical treatment on the hydrogenation of CO and CO2 was studied using a flow milling vial as a catalytic reactor. Traditional catalysts for the methane formation (Ni, Zr, Zr-Ni-containing samples, Zr hydride and Zr-Ni hydrides of various genesis), as well as inactive NiO and ZrO2, were examined.
O.S. Morozova +3 more
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Elucidation of Degradation Mechanism of Dioxins during Mechanochemical Treatment
Environmental Science & Technology, 2005Model dioxin compounds 4-chlorobiphenyl (4CB), octa-chlorodibenzo-p-dioxin (OCDD), and octachlorodibenzofuran (OCDF) were degraded by a mechanochemical (MC) process that involved milling with calcium oxide by use of a planetary ball mill. The degradation of 4CB produced mainly chloride ions and biphenyl, with the chlorine removal efficiency reaching ...
Yugo, Nomura +2 more
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Enzymatic treatment of mechanochemical modified natural bamboo fibers
Fibers and Polymers, 2012Natural bamboo fibers have attracted growing demands in textile industry due to benefit from their excellent properties and renewable and abundant resource; however, there are still limitations for their application in textile industry because of their poor quality. For this reason, enzymes treatments on mechanochemically modified natural bamboo fibers
Lifang Liu +3 more
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Characterization of nanostructured TiO2 prepared by mechanochemical treatment
2004The high-energy ball-milling of TiO2 induces changes in the crystal structure and decreases particle sizes to nano dimensions. In this work the conditions of changing TiO2 microstructure during the mechanochemical process were studied. The milling of TiO2 was performed in air using the Fritsch Pulverisette 6 planetary ball mill with vial and balls made
Gajović, Andreja +3 more
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Mechanochemical treatment of high silica bauxite with lime
Minerals Engineering, 2002The mechanochemical processing of bauxite with lime has been investigated. The milling of bauxite and lime mixtures in an attritor mill resulted in the formation of an iron rich hydrogarnet phase in bauxite/lime slurries containing greater than 9% CaO.
P.G. McCormick, T. Picaro, P.A.I. Smith
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Cobalt Ferrite Nanoparticles Prepared by Coprecipitation/Mechanochemical Treatment
Chemistry Letters, 2004Abstract Cobalt ferrite (CoFe2O4) nanoparticles have been prepared by chemical coprecipitation, mechanical milling and subsequent thermal treatment. Sodium chloride was added as a diluent during mechanical milling to avoid agglomeration of the particles.
Huaming Yang +3 more
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Structural changes in silver iodide upon mechanochemical treatment
Glass Physics and Chemistry, 2012Finely dispersed powder of AgI has been investigated using the mechanochemical method. The crystal size was determined by scanning electron microscopy, and the crystal element composition was estimated using X-ray microanalysis. The diameter of powder particles was 500–1000 nm. Their surface is characterized by an expressed faceting attributable to the
V. V. Tomaev +2 more
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Effects of Mechanochemical Treatment on Yttrium Oxyapatite Formation
Journal of Materials Synthesis and Processing, 2001Structural changes of Y2O3-SiO2 solid system during a fine milling in air were investigated. The milling of a mixture in a molar ratio Y2O3/SiO2 = 7/9 affect the structure of the solids. After heating the samples at T > 1000°C new phases were obtained by a thermal reaction between Y2O3 and SiO2, as a result of the mechanochemical activation. The extent
G. Tzvetkov, N. Minkova
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