Étude de la carbonisation des composés organiques et des polymères

Christou, N.; Fitzer, E.; Kalka, Joanna; Schafer, W.R.

doi:10.1051/jcp/196966s1050

Cited by 14 publications

(2 citation statements)

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“…On the contrary, a reduction of the layer distance is favoured during the 'puffing' interval. This finding is in agreement with previous results (Christu et al 1969).…”

Section: 4 Characterisation Of the Inicrostructural Changes Due To G...supporting

confidence: 94%

Flexural strength of polygranular carbon and graphite materials after various heat treatments and their correlation with porosity

Fitzer¹,

Köchling²,

Schwarz³

1980

J. Phys. D: Appl. Phys.

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Concerns the changes of flexural strength of fine grained extruded carbon and graphite materials caused by heat treatment between 1800 and 3000K. Measurements of flexural strength, bulk density and pore size distribution were performed at room temperature after heat treatment, whereas the thermal (reversible and irreversible) bulk expansion was measured in situ with a pushrod dilatometer up to 2700K. A correlation of all data points measured is discussed to explain the strength changed during heat treatment. A distinction is made between geometric effects, caused by isotropic bulk dilatation or shrinkage during heat treatment, and quality effects, consisting mainly of crystalline rearrangement processes. Special emphasis is given to 'sulphur-puffing and its influence on strength and porosity of the samples.

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“…On the contrary, a reduction of the layer distance is favoured during the 'puffing' interval. This finding is in agreement with previous results (Christu et al 1969).…”

Section: 4 Characterisation Of the Inicrostructural Changes Due To G...supporting

confidence: 94%

Flexural strength of polygranular carbon and graphite materials after various heat treatments and their correlation with porosity

Fitzer¹,

Köchling²,

Schwarz³

1980

J. Phys. D: Appl. Phys.

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“…Keratin, the predominant component of biomass (over 90%), emerges as a key player in this thermal superiority [47,63]. Alpha-grade keratin, rich in carbon, oxygen, nitrogen, a small proportion of hydrogen, and approximately 5% sulfur [13,66,67], reinforces the molecular bonds of the bio-composite. This unique composition contributes to its increased thermal stability, making the bio-composite more resistant to high temperatures.…”

Section: Comparison Of Experimental Resultsmentioning

confidence: 99%

Thermogravimetric Analysis of Rigid PVC and Animal-Origin Bio-Composite: Experimental Study and Comparative Analysis

Ennadafy,

Jammoukh,

Hilali

et al. 2024

IJHT

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Polyvinyl chloride remains one of the most prevalent polymers in the industry, yet its substantial environmental impact, attributed to its fossil origin, prompts the exploration of innovative solutions. Composites, particularly bio-composites, emerge as promising alternatives to mitigate the ecological footprint of PVC while enhancing its characteristics. This study addresses this concern by presenting the development of a bio-composite comprising 90% PVC and 10% biological filler derived from bovine horn, renowned for its high keratin content. The primary objective was to create an innovative, environmentally friendly, and sustainable material. To rigorously assess the properties and thermal stability of this bio-composite, a comparative thermogravimetric analysis was conducted against virgin PVC. The results reveal the superior thermal stability of the biocomposite compared to virgin PVC, particularly beyond 280℃. This enhancement is attributed to the substantial presence of keratin in the biological filler, constituting nearly 90% of the horn biomass. Notably, the observed mass loss in the bio-composite is lower than that of virgin PVC at temperatures exceeding 280℃. This research underscores the potential of bio-composites, specifically those incorporating bovine horn-derived filler, as promising alternatives to mitigate the ecological footprint of PVC while concurrently improving its thermomechanical characteristics. The innovative material developed in this study holds promise for sustainable applications in various industries, aligning with the growing demand for environmentally conscious alternatives.

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Catalysis of graphitisation

1970

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The demand for graphites with specific properties and for an improvement in the economics of graphite production in recent years has led to an increased interest in catalytic graphitisation. At the present time, however, there is no review available of published studies and this paper attempts to make good this deficiency. Mechanisms whereby inorganic additives can catalyse graphitisation are considered, followed by a discussion of the mechanisms by which inorganic additives promote the graphitisation process. A comprehensive survey of the relevant literature to date is presented which describes in more detail the type of carbon used, the experimental techniques employed and the improvement obtained in graphite quality.

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Étude de la carbonisation des composés organiques et des polymères

Cited by 14 publications

References 0 publications

Flexural strength of polygranular carbon and graphite materials after various heat treatments and their correlation with porosity

Flexural strength of polygranular carbon and graphite materials after various heat treatments and their correlation with porosity

Thermogravimetric Analysis of Rigid PVC and Animal-Origin Bio-Composite: Experimental Study and Comparative Analysis

Catalysis of graphitisation

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