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Effect of encapsulation with zeolite and coating with TiO 2 on the thermal stability of caffeine during melt extrusion of a PET/TiO 2 @(zeolite/caffeine) nanocomposite
Kim Y.J., Choi H.M., Jang S.H., Min K.H., Oh T.H.,
Published in Elsevier B.V.
Volume: 30
Issue: 4
Pages: 854 - 860
The practice of encapsulating a functional material in a thermally stable porous material displays great potential in preventing decomposition during high-temperature processing. In this study, caffeine encapsulated in zeolite was coated with TiO 2 to withstand high-temperature melt extrusion with poly(ethylene terephthalate) (PET). Two coating processes were trialed: in situ encapsulation and coating where TiO 2 precursor was added to zeolite/caffeine solution; and ex situ coating in which pre prepared zeolite/caffeine capsules were added to the TiO 2 precursor for coating. The TiO 2 -coated nanocomposites were melt-extruded with PET at 285 °C. Residual amounts of caffeine confirmed the shielding effect of the TiO 2 coating during the high-temperature melt extrusion. The in situ TiO 2 coating process was more effective than the ex situ process. © 2019 The Society of Powder Technology Japan
About the journal
JournalData powered by TypesetAdvanced Powder Technology
PublisherData powered by TypesetElsevier B.V.
Open AccessNo