Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A New Method of Diatomaceous Earth Fractionation - A Bio-Raw Material Source for Epoxy-Based Composites

Version 1 : Received: 8 March 2021 / Approved: 9 March 2021 / Online: 9 March 2021 (11:44:48 CET)

A peer-reviewed article of this Preprint also exists.

Dobrosielska, M.; Dobrucka, R.; Gloc, M.; Brząkalski, D.; Szymański, M.; Kurzydłowski, K.J.; Przekop, R.E. A New Method of Diatomaceous Earth Fractionation—A Bio-Raw Material Source for Epoxy-Based Composites. Materials 2021, 14, 1663. Dobrosielska, M.; Dobrucka, R.; Gloc, M.; Brząkalski, D.; Szymański, M.; Kurzydłowski, K.J.; Przekop, R.E. A New Method of Diatomaceous Earth Fractionation—A Bio-Raw Material Source for Epoxy-Based Composites. Materials 2021, 14, 1663.

Journal reference: Materials 2021, 14, 1663
DOI: 10.3390/ma14071663

Abstract

The authors of this paper use an original method of diatomaceous earth fractionation, which allows for obtaining a filler with a specific particle size distribution. The method makes it possible to separate small, disintegrated and broken diatom frustules from those which maintained their original form in diatomaceous earth. The study covers a range of tests conducted to prove that such a separated diatomic fraction shows features different from the base diatomite used as an epoxy resin filler. We have examined mechanical properties of a series of diatomite/resin composites considering the weight fraction of diatoms and the parameters of the composite production process. The studied composites of Epidian 601 epoxy resin cross-linked with amine-based curing agent Z-1 contained 0 to 70% vol. of diatoms or diatomaceous earth. Samples were produced by casting into silicone moulds in vacuum degassing conditions and, alternatively, without degassing. The results have shown that the size and morphology of the filler based on diatomaceous earth affects mechanical and rheological properties of systems based on epoxy resin.

Subject Areas

diatomite; bio-composites; , mechanical properties; fractionation; purification of diatomaceous earth; bio-raw materials

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