scholarly journals Explosive potential of energetic mixtures based on hydrogen peroxide

2019 ◽  
pp. 14-20
Author(s):  
Andrzej Papliński
Keyword(s):  
Hydrogen Peroxide ◽  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Detonation Velocity ◽  
Oxygen Balance ◽  
Gaseous Products ◽  
Wide Range ◽  
Explosive Properties ◽  
Products Of Reaction ◽  
Energetic Compositions

The explosion and detonation of energetic compositions based on hydrogen peroxide (H2O2, HP) is investigated. Fuels with different oxygen balance were considered in the mixture with HP/methanol, ethylene glycol, glycerine ethanol. Detonation performance at a wide range of reciprocal HP/fuel concentrations was examined. Heats of explosion at constant volume, detonation velocity, as well as volume of gaseous products of reaction were estimated in thermochemical evaluations. The modification of explosive properties of the high-energetic CHNO material by addition of hydrogen peroxide, was also investigated. To represent CHNO explosives, nitromethane was considered. In the performed analysis, aqueous solutions of hydrogen peroxide were considered with the aim of obtaining the appropriate fuel/HP/water ratios to predict potential explosive compositions.

Radiation-induced Rearrangement of Ethylene Glycol in Aqueous Solution

1971 ◽  
Vol 49 (14) ◽  
pp. 2382-2389 ◽  
Author(s):  
C. E. Burchill ◽  
K. M. Perron
Keyword(s):  
Hydrogen Peroxide ◽  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Transfer Reaction ◽  
Major Product ◽  
Hydrogen Atom Transfer ◽  
Γ Irradiation ◽  
Radical Chain ◽  
Radiation Induced ◽  
A Chain

Under γ-irradiation, aqueous solutions of ethylene glycol containing hydrogen peroxide form acetaldehyde as a major product via a free-radical chain rearrangement. The yield of acetaldehyde is essentially unchanged when hydrogen peroxide is replaced by N2O or HClO4. A mechanism is proposed in which the glycol radical, ĊOHCH2OH, rearranges to the acetaldehyde precursor, ĊH2CHO, followed by the hydrogen atom transfer reaction;[Formula: see text]thus propagating a chain reaction.2The rearrangement is also induced by the photo-dissociation of H2O2 in aqueous solutions of ethylene glycol.

Origin and Use of Hydrogen Peroxide in Neurosurgery

Neurosurgery ◽  
2021 ◽  
Author(s):  
David Bailey ◽  
Elias B Rizk
Keyword(s):  
Hydrogen Peroxide ◽  
Hemostatic Agent ◽  
Medical Field ◽  
Wide Range ◽  
Actual Effectiveness ◽  
Fatal Complications

Abstract Hydrogen peroxide (H2O2) is a chemical with a wide range of applications. This includes its use in the medical field, in which its use has been ubiquitous but is most useful as an antiseptic and in achieving hemostasis. Neurosurgeons have been using H2O2 for well over a century, primarily for its hemostatic and antiseptic effects. This is in spite of the fact that the actual effectiveness of H2O2 as an antiseptic is questionable, and its use, in general, may be more dangerous than it appears. We review the application of H2O2 in medicine generally and, more specifically, in neurosurgery. This review outlines the reasoning behind the use of H2O2 as an antiseptic and details why it may not be as effective as one might think. We also detail its use as a hemostatic agent in neurosurgery, reviewing a number of techniques in which it has been useful in this role. Finally, we review the documented cases of complications associated with the use of H2O2 in neurosurgery. Ultimately, we conclude that the use of H2O2 in neurosurgery be reconsidered because of its lack of effectiveness as an antiseptic and potentially fatal complications.

scholarly journals Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1525
Author(s):  
Sergey Vorobyev ◽  
Elena Vishnyakova ◽  
Maxim Likhatski ◽  
Alexander Romanchenko ◽  
Ivan Nemtsev ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Silver Nanoparticles ◽  
Flexible Electronics ◽  
Photoelectron Spectroscopy ◽  
Colloidal Solutions ◽  
Ag Nps ◽  
Wide Range ◽  
Carboxylic Groups ◽  
The Media ◽  
Sulfide Ions

Carey Lea silver hydrosol is a rare example of very concentrated colloidal solutions produced with citrate as only protective ligands, and prospective for a wide range of applications, whose properties have been insufficiently studied up to now. Herein, the reactivity of the immobilized silver nanoparticles toward oxidation, sulfidation, and sintering upon their interaction with hydrogen peroxide, sulfide ions, and chlorocomplexes of Au(III), Pd(II), and Pt(IV) was investigated using SEM and X-ray photoelectron spectroscopy (XPS). The reactions decreased the number of carboxylic groups of the citrate-derived capping and promoted coalescence of 7 nm Ag NPs into about 40 nm ones, excluding the interaction with hydrogen peroxide. The increased nanoparticles form loose submicrometer aggregates in the case of sulfide treatment, raspberry-like micrometer porous particles in the media containing Pd(II) chloride, and densely sintered particles in the reaction with inert H2PtCl6 complexes, probably via the formation of surface Ag-Pt alloys. The exposure of Ag NPs to HAuCl4 solution produced compact Ag films along with nanocrystals of Au metal and minor Ag and AgCl. The results are promising for chemical ambient temperature sintering and rendering silver-based nanomaterials, for example, for flexible electronics, catalysis, and other applications.

Radiation-induced oxidation of 2-propanol by hydrogen peroxide in aqueous solutions

1970 ◽  
Vol 48 (18) ◽  
pp. 2948-2948
Author(s):  
C. E. Burchill ◽  
I. S. Ginns
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Solutions ◽  
Radiation Induced

not available

Oxidation-reduction chemistry of hydrogen peroxide in aprotic and aqueous solutions

1979 ◽  
Vol 18 (7) ◽  
pp. 1971-1973 ◽  
Author(s):  
Mark M. Morrison ◽  
Julian L Roberts ◽  
Donald T. Sawyer
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Solutions ◽  
Oxidation Reduction

Hydrogen Peroxide Yields in X-Irradiated Aqueous Solutions A Sensitive Method Based on Hydrazide Chemiluminescence

1955 ◽  
Vol 3 (4) ◽  
pp. 379 ◽  
Author(s):  
W. V. Mayneord ◽  
W. Anderson ◽  
H. D. Evans ◽  
D. Rosen
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Solutions ◽  
Sensitive Method

The slow oxidation of methane

1956 ◽  
Vol 235 (1201) ◽  
pp. 158-173 ◽  
Keyword(s):  
Activation Energy ◽  
Hydrogen Peroxide ◽  
Induction Period ◽  
Hydrofluoric Acid ◽  
Pressure Rise ◽  
Pressure Change ◽  
Kcal Mole ◽  
Gaseous Products ◽  
Oxidation Of Methane ◽  
Reproducible Manner

Mixtures of methane and oxygen behave in a reproducible manner at temperatures of 440 to 520°C and initial pressures of 100 to 350 mm when reacting in Pyrex vessels freshly cleaned with hydrofluoric acid. The apparent order of the reaction ranged from 2∙3 to 2∙6 and the overall activation energy from 29 to 41 kcal/mole. Analyses of the products formed have been made, together with measurements of pressure change. Formaldehyde is formed from the commencement of the reaction including the induction period, but its concentra­tion reaches a maximum near the stage where the pressure rise is a maximum, and then falls off. Hydrogen peroxide is also formed, less rapidly in the earliest stage, but its rate of formation overtakes that of formaldehyde and it reaches an even higher concentration. No other peroxides were detected, nor was methanol found. Hydrogen was present in the gaseous products. These observations are not in full accord with some of the conclusions derived from earlier investigations.

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