Abstract
Modified halloysite as a filler for epoxy resins The modification methods of halloysite and further applications of the modified mineral as a filler for epoxy resins have been presented. The advantage of ultrasound treatment prior to chemical modification with an organic compound in order to obtain a hybrid filler was confirmed. The analysis of the composites obtained with the use of the modified halloysite (3-5 wt.% range) as a filler for epoxy resins indicates an improved interphase interaction and mechanical properties in comparison to the composites based on neat halloysite.
Highlights
Halloysite is a volcanic layered mineral of the formula Al2Si2O5(OH)[4] which is characterized by high porosity and a relativity large surface area, as well as good ionexchange properties and susceptibility to chemical and mechanical treatment
– a shift from 467 cm-1 (Si-O) to 469 cm-1, 1033 cm-1 (Si-O-Si) to 1035 cm-1, 536 cm-1, (Al-O) to 531 cm-1 in halloysite; The above-mentioned changes of characteristic wavebands indicate an active interaction between the modifying organic compound and the mineral-halloysite to obtain an active modified filler
The chosen modification method was found to be effective in obtaining active fillers
Summary
The modification methods of halloysite and further applications of the modified mineral as a filler for epoxy resins have been presented. The advantage of ultrasound treatment prior to chemical modification with an organic compound in order to obtain a hybrid filler was confirmed. The analysis of the composites obtained with the use of the modified halloysite (3–5 wt.% range) as a filler for epoxy resins indicates an improved interphase interaction and mechanical properties in comparison to the composites based on neat halloysite
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