Epoxy composite materials filled with rice husk ash

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Abstract

The present research responds to two current tendencies, such as circular economy, involving reuse of industrial waste, and green chemistry, presupposing application of renewable resources and technologies, which minimize the negative environmental impact. The present article is dedicated to the study of the application of rice husk and its ash as a filled for epoxy composite materials. Rice husk represents a multi-tonnage agricultural by-product, subject to recycling, and at the same time, is a valuable source of amorphous silica. Temperature regime of rice husk ash (RHA) production, optimum content and particle size of filler providing maximum modifying effect were determined. The influence of modifying fillers on the complex of operational properties of filled epoxy compositions including hardness, wear resistance, adhesion to steel and aluminium and antifriction properties of epoxy coatings has been established. A comparative analysis of the properties of modified compositions with non-filled ones and with compositions filled with fully amorphous silica, including industrial analogue Aerosil 300, has been carried out. It has been established that the best compatibility with polymer epoxy matrix is possessed by rice husk ash obtained at the combustion temperature of 500оC introduced in the amount of 10 mass parts per 100 mass parts of epoxy polymer.

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About the authors

A. G. Sokolova

National Research Moscow State University of Civil Engineering

Author for correspondence.
Email: as.falconi@yandex.ru

Candidate of Sciences (Engineering)

Russian Federation, 26, Yaroslavskoe Highway, Moscow, 129337

References

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Supplementary files

Supplementary Files
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2. Fig. 1. Dependency of wear resistance of epoxy compositions on the content of rice husk ash burnt at 500оC

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3. Fig. 2. Dependency of static friction coefficient of epoxy compositions on the content of rice husk ash burnt at 500оC

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4. Fig. 3. Dependency of hardness of epoxy compositions on the content of rice husk ash burnt at 500оC

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5. Fig. 4. Static friction coefficient of epoxy coatings filled with silicon dioxide

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6. Fig. 5. Dependency of adhesional strength of epoxy coatings on the content of rice husk ash burnt at 500оC

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7. Fig. 6. Dependency of peeling strength to steel and aluminum of epoxy coatings on the content of rice husk ash burnt at 500оC

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8. Fig. 7. Dependency of bending strength of epoxy coatings on the content of rice hush ash burnt at 500оC

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9. Fig. 8. The content of gel-fraction of epoxy compositions filled with rice waste products and Aerosil 300

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10. Fig. 9. Pot life of epoxy compositions filled with rice waste products and Aerosil 300

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11. Fig. 10. Dependency of pot life of epoxy compositions on the content of rice husk ash burnt at 500оC

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12. Fig. 11. Dependency of gel-fraction of epoxy compositions on the content of rice husk ash burnt at 500оC

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13. Fig. 12. Electronic pictures of samples filled with Aerosil 300 (1) and rice husk ash (2) with resolution of 100 μm (а) and 10 μm (b)

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