The Determination of Surface Thermodynamic Properties of Nanoparticles by Thermal Analysis

Piloyan, G. O.; Бортников, Н. С.; Боева, Н. М.

doi:10.4236/jmp.2013.47a2003

Cited by 11 publications

(7 citation statements)

References 6 publications

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“…The differences in the character of the destruction of the modified samples of CG complexite at the first stage of the reaction of thermal destruction are proved by calculated values of n and E (Table 2), where magnitude n is the order of a heterogeneous reaction, and magnitude E is the energy of activation of a heterogeneous reaction [19]. The heat of the processes of thermal dissociation of the samples of CG fiber modified by flame retardant is calculated according to the method described in paper [19]. Note: *Sample 4 was obtained using procedure [5], their physical-chemical and sorption qualities are also described there…”

Section: Results Of Studying Thermal Propertiesmentioning

confidence: 95%

“…The kinetic parameters of the destruction of the studied samples of cellulose fiber were calculated using the method of [19] from the data of the curves of differential thermogravimetric (DTG) and thermogravimetric (TG) analysis. Table 2 shows the values of activation energy, the order of reaction, pre-exponents in the Arrhenius equation, based on the parameters of the differential thermogravimetric curve alone.…”

Section: Discussion Of Results Of Studying the Samples Of Cg Compleximentioning

confidence: 99%

“…The kinetic parameters of the destruction of the studied samples of cellulose fibers were calculated from the data of the curves of differential-thermogravimetric (DTG) and thermogravimetric (TG) analysis. To do this, we used the technique described in paper [19]. The DTG curve was split by the lines parallel to the ordinate axis.…”

Section: 3 Methods To Study the Thermal Properties Of Fiber Samplesmentioning

confidence: 99%

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Chemical cellulose-based fibers of decreased flammability

Korovnikova

Dubyna

Oliinik

et al. 2020

EEJET

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The studies reported here have made it possible to determine the optimal ways of fire protection, in which the samples of modified complexite have reduced flammability. The sample with the ions of molybdenum (VI), treated with phosphoric acid, had the highest magnitude of oxygen index among five modified samples of the fiber. This is the most fire-protected sample, which contains three types of flame retardants: nitrogen (amidoxime groups of complexite, phosphorus (treatment with phosphoric acid) and molybdenum (VI). The obtained data indicate the chemical interaction of flame retardant with complexite. The morphology of fibers and the process of their destruction are influenced by the introduction of flame retardants. Scanning electronic microphotographs show the existence of a morphological change of the surface at modification of the complexite samples with flame retardant. The introduction of flame retardant into complexite affects the process of thermal destruction of the samples in the air and argon media. At the same time, the introduction of molybdenum (VI) significantly reduces the thermal stability of fibers. It is likely that processes of thermal destruction can be catalyzed by metals both in the air medium and in the argon medium. The magnitudes of order of reaction of thermal decomposition at the transition from a fiber sample treated only with acids to the samples of complexite containing molybdenum (VI) decreases up to 0.38. At the same time, the values of activation energies E, kcal/mol, and the enthalpy of the process of thermal destruction of complexite DH, kcal/mole also decrease. The mechanical properties of fibers at the introduction of flame retardants into the fiber composition change insignificantly. Depending on the composition of flame retardants, rupture load decreases by 6-11 %, lengthening of the samples decreases by 6-16 %. Thus, there are some grounds to suggest that it is possible to create fibrous materials based on cellulose with predetermined properties of reduced flammability

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Section: Results Of Studying Thermal Propertiesmentioning

confidence: 95%

Section: Discussion Of Results Of Studying the Samples Of Cg Compleximentioning

confidence: 99%

Section: 3 Methods To Study the Thermal Properties Of Fiber Samplesmentioning

confidence: 99%

See 1 more Smart Citation

Chemical cellulose-based fibers of decreased flammability

Korovnikova

Dubyna

Oliinik

et al. 2020

EEJET

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“…In this equation, the surface Gibbs free energy ( ) is a function of temperature [317] as observed experimentally. [318] (78)…”

Section: Nanosizing For Better Thermodynamicsmentioning

confidence: 99%

How to Design Hydrogen Storage Materials? Fundamentals, Synthesis, and Storage Tanks

Lai

Sun

Wang

et al. 2019

Advanced Sustainable Systems

112

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“…In the nano‐dispersed systems, the dispersivity has effects on thermodynamic and kinetic parameters of chemical reactions [22]. The surface thermodynamic properties of NPs take a distinct effect on thermodynamics and kinetic parameters of chemical reactions in nano‐dispersed systems [23]. Another technique explored for the assurance of surface thermodynamic properties of NPs.…”

Section: Introductionmentioning

confidence: 99%