跳至主要内容

Mechanical Activation of Chemical Process

Read  full  paper  at:
http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53134#.VLXUFcnQrzE

Author(s)  

ABSTRACT
Recently, some specificities of hydrothermal synthesis have been discussed by Avvakumov, Senna and Kosova, emphasizing the ability of water to dissolve selected materials at increased temperature and pressure, and suggest that the process is based on self-ionization. The present author proposes an alternative approach based on low-energy electrons generated by processes of mechanical action (mechanical activation). These types of reactions encompass both mechanochemistry and tribochemistry. Mention wise is that tribochemical reactions are distinct from those of thermochemical reactions. G. Kaupp considers mechanochemistry as mechanical breakage of intramolecular bonds by external force. Sakaguchi et al. introduced the concept of mechano-anion-radicals (MARs) generation process in the polymer mechanical degradation via two types of carbon-carbon (C-C) bond cleavage, homogeneous and heterogeneous. Based on the negative-ion-radical-action-mechanism (NIRAM) approach, this paper proposes a novel mechanism which eliminates the heterogeneous C-C bond splitting. It is evidenced that both the proposed alternative mechanism and the substitution of the heterogeneous C-C bond splitting are possible.
 
Cite this paper
Kajdas, C. (2015) Mechanical Activation of Chemical Process. Materials Sciences and Applications, 6, 60-67. doi: 10.4236/msa.2015.61008.
 
References
[1]Takacs, L. (2014) What Is Unique about Mechanochemical Reactions? Acta Physica Polonica A, 126, 1040-1043.
 
[2]Urakaev, F.K. (2007) Mechanodestruction of Minerals at the Crack Tip (Overview): 1. Experiment. Physics and Chemistry of Minerals, 34, 351-361.
 
[3]Faraday Discussion 170 (2014) Mechanochemistry: From Functional Solids to Single Molecules. Montreal, May 21-23.
 
[4]Carey-Lea, M. (1893) On Endothermic Reactions Effected by Mechanical Force. Philosophical Magazine, 36, 350-351.
 
[5]Takacs, L. (2003) M. Carey Lea. The Father of Mechanochemistry. Bulletin for the History of Chemistry, 28, 26-34.
 
[6]Takacs, L. (2003) M. Carey Lea, the First Mechanochemists. Journal of Materials Science, 39, 4987-4993.
 
[7]Takacs, L. (2000) The First Documented Mechanochemical Reaction? Journal of Metals, 52, 12-13.
 
[8]Kajdas, C. (2013) General Approach to Mechanochemistry and Its Relation to Tribochemistry. In: Pihtili, H., Ed., Tribology in Enginering, InTech, Chapter 11.
http://dx.doi.org/10.5772/50507
 
[9]Takacs, L. (2013) The Historical Development of Mechanochemistry. Chemical Society Reviews, 42, 7649-7659.
http://dx.doi.org/10.1039/c2cs35442j
 
[10]Wang, Y., Botvinick, E.L., Zhao, Y., Berns, M.W., Usami, S., Tsien, R.Y. and Chien, S. (2005) Visualizing the Mechanical Activation of Src. Nature, 434, 1040-1045.
http://dx.doi.org/10.1038/nature03469
 
[11]Katsumi, A., Orr, A.W., Tzima, E. and Schwartz, M.A. (2003) Integrins in Mechanotransduction. Journal of Biological Chemistry, 279, 12001-12004.
http://dx.doi.org/10.1074/jbc.R300038200
 
[12]Braga, D., Maini, L. and Grepioni, F. (2013) Mechanochemical Preparation of Co-Crystals. Chemical Society Reviews, 42, 7638-7648.
http://dx.doi.org/10.1039/c3cs60014a
 
[13]Sakaguchi, M. and Kashiwabara, H. (1992) A Generation Mechanism of Triboelectricity Due to the Reaction of Mechanoradicals with Mechanoions Which Are Produced by Mechanical Fracture of Solid Polymer. Colloid and Polymer Science, 270, 621-626.
http://dx.doi.org/10.1007/BF00654038
 
[14]Sakaguchi, M., Miwa, Y., Hara, S., Sugino, Y., Yamamoto, K. and Shimada, S. (2004) Triboelectricity in Polymers: Effects of the Ionic Nature of Carbon-Carbon Bonds in the Polymer Main Chain on Charge Due to Yield of Mechano- Anions Produced by Heterogeneous Scission of the Carbon-Carbon Bond by Mechanical Fracture. Journal of Electrostatics, 62, 35-50.
http://dx.doi.org/10.1016/j.elstat.2004.04.003
 
[15]Simionescu, Cr.I., Oprea, Cl.V. and Nicoleanu, J. (1983) Mechanochemically Initiated Polymerization-5. Polymerization by Vibratory Milling of Acrylamide and Methacrylamide. European Polymer Journal, 19, 525-528.
http://dx.doi.org/10.1016/0014-3057(83)90204-5
 
[16]Kajdas, C. (1994) Importance of Anionic Reactive Intermediates for Lubricant Component Reactions with Friction Surfaces. Lubrication Science, 6, 203-228.
http://dx.doi.org/10.1002/ls.3010060302
 
[17]Kaupp, G. (2009) Mechanochemistry: The Varied Applications of Mechanical Bond-Breaking. The Royal Society of Chemistry. CrystEngComm, 11, 388-403.
http://dx.doi.org/10.1039/b810822f
 
[18]Kajdas, C. (1983) On a Negative-Ion Concept of EP Action of Organo-Sulfur Compounds. ASLE Transactions, 28, 21-30.
http://dx.doi.org/10.1080/05698198508981590
 
[19]Kajdas, C. (1985) About a Negative-Ion Concept of the Antiwear and Antiseizure Action of Hydrocarbons during Friction. Wear, 101, 1-12.
http://dx.doi.org/10.1016/0043-1648(85)90208-X
 
[20]Kajdas, C. (1987) About an Anionic-Radical Concept of the Lubrication Mechanism of Alcohols. Wear, 116, 167-180.
http://dx.doi.org/10.1016/0043-1648(87)90231-6
 
[21]Hsu, S.M., Zhang, J. and Yin, Z. (2002) The Nature and Origin of Tribochemistry. Tribology Letters, 13, 131-139.
http://dx.doi.org/10.1023/A:1020112901674
 
[22]Boldyrev, V.V. and Tkacova, K. (2000) Mechanochemistry of Solids: Past, Present, and Prospects. Journal of Materials Synthesis and Processing, 8, 121-132.
http://dx.doi.org/10.1023/A:1011347706721
 
[23]Carey-Lea, M. (1893) XXXVI. Note on the Calculation of Correlation between Organs. Philosophical Magazine Series 5, 36, 350-351.
http://dx.doi.org/10.1080/14786449308620487
 
[24]Baláz, P., Choi, W.S., Fabián, M. and Godocíková, E. (2006) Mechanochemistry in the Preparation of Advanced Materials. Acta Montanistica Slovaca, 11, 122-129.
 
[25]Takacs, L.M. (2013) The Historical Development of Mechanochemistry. Chemical Society Reviews, 42, 7649-7659.
http://dx.doi.org/10.1039/c2cs35442j
 
[26]James, S.L., Adams, C.J., Bolm, C., Braga, D., Collier, P., Friscic, T., et al. (2012) Mechanochemistry: Opportunities for New and Cleaner Synthesis. Chemical Society Reviews, 41, 413-447.
http://dx.doi.org/10.1039/c1cs15171a
 
[27]Beyer, M.K. and Clausen-Schaumann, H. (2005) Mechanochemistry: The Mechanical Activation of Covalent Bonds. Chemical Reviews, 105, 2921-2948.
http://dx.doi.org/10.1021/cr030697h
 
[28]Fujiwara, K. and Komatsu, K. (2002) Mechanochemical Synthesis of a Novel C60 Dimer Connected by a Silicon Bridge and a Single Bond. Organic Letters, 4, 1039-1041.
http://dx.doi.org/10.1021/ol025630f
 
[29]Guo, X., Xiang, D., Duan, G. and Mou, P. (2010) A Review of Mechanochemistry Applications in Waste Management. Waste Management, 30, 4-10.
http://dx.doi.org/10.1016/j.wasman.2009.08.017
 
[30]Litvin, B. and Popolitov, V. (1984) Hydrothermal Synthesis of Inorganic Compounds. Nauka, Moskva.
 
[31]Avvakumov, E., Senna, M. and Kosova, N. (2001) Soft Mechanochemical Synthesis. Kluwer Academic Publishers, Boston.
 
[32]Oprea, C.V. and Popa, M. (1980) Mechanochemically Initiated Polymerization—II. Influence of Some Factors on the Mechanochemical Homopolymerization of Acrylonitrile by Vibratory Milling. Die Angewandte Makromolekulare Chemie, 90, 13-22.
 
[33]Oprea, C.V. and Popa, M. (1980) Mechanochemically Initiated Polymerizations. Characterization of Poly(acrylonitrile) Mechanically Synthesized by Vibratory Grinding. Die Angewandte Makromolekulare Chemie, 92, 73-88.                                                                                                                            eww150114lx

评论

此博客中的热门博文

A Comparison of Methods Used to Determine the Oleic/Linoleic Acid Ratio in Cultivated Peanut (Arachis hypogaea L.)

Cultivated peanut ( Arachis hypogaea L.) is an important oil and food crop. It is also a cheap source of protein, a good source of essential vitamins and minerals, and a component of many food products. The fatty acid composition of peanuts has become increasingly important with the realization that oleic acid content significantly affects the development of rancidity. And oil content of peanuts significantly affects flavor and shelf-life. Early generation screening of breeding lines for high oleic acid content greatly increases the efficiency of developing new peanut varieties. The objective of this study was to compare the accuracy of methods used to classify individual peanut seed as high oleic or not high oleic. Three hundred and seventy-four (374) seeds, spanning twenty-three (23) genotypes varying in oil composition (i.e. high oleic (H) or normal/not high oleic (NH) inclusive of all four peanut market-types (runner, Spanish, Valencia and Virginia), were individually tested ...

Location Optimization of a Coal Power Plant to Balance Costs against Plant’s Emission Exposure

Fuel and its delivery cost comprise the biggest expense in coal power plant operations. Delivery of electricity from generation to consumers requires investment in power lines and transmission grids. Placing a coal power plant or multiple power plants near dense population centers can lower transmission costs. If a coalmine is nearby, transportation costs can also be reduced. However, emissions from coal plants play a key role in worsening health crises in many countries. And coal upon combustion produces CO 2 , SO 2 , NO x , CO, Metallic and Particle Matter (PM10 & PM2.5). The presence of these chemical compounds in the atmosphere in close vicinity to humans, livestock, and agriculture carries detrimental health consequences. The goal of the research was to develop a methodology to minimize the public’s exposure to harmful emissions from coal power plants while maintaining minimal operational costs related to electric distribution losses and coal logistics. The objective was...

Evaluation of the Safety and Efficacy of Continuous Use of a Home-Use High-Frequency Facial Treatment Appliance

At present, many home-use beauty devices are available in the market. In particular, many products developed for facial treatment use light, e.g., a flash lamp or a light-emitting diode (LED). In this study, the safety of 4 weeks’ continuous use of NEWA TM , a high-frequency facial treatment appliance, every alternate day at home was verified, and its efficacy was evaluated in Japanese individuals with healthy skin aged 30 years or older who complained of sagging of the facial skin.  Transepidermal water loss (TEWL), melanin levels, erythema levels, sebum secretion levels, skin color changes and wrinkle improvement in the facial skin were measured before the appliance began to be used (study baseline), at 2 and 4 weeks after it had begun to be used, and at 2 weeks after completion of the 4-week treatment period (6 weeks from the study baseline). In addition, data obtained by subjective evaluation by the subjects themselves on a visual analog scale (VAS) were also analyzed. Fur...