Journal of Food Science and Agricultural Technology (JFAT)
School of Agro-Industry
Mae Fah Luang University

ISSN: 2408-1736


Preparation and Characterization of Biodegradable Thermoformed Tray from Thermoplastic Cassava Starch/poly(lactic acid) Blend Incorporating Encapsulated Black Pepper Essential Oil

Chanakorn Yokesahachart, Jaruporn Rakmai, Udomluk Sukatta, Prapassorn Rugthaworn, Keowpetch Lobyam, Nattaporn Khanoonkon


This current research aims to study the preparation and characterization of thermoformed trays from poly(lactic acid)/thermoplastic cassava starch (PLA/TPS) and PLA/TPS incorporating encapsulated black pepper essential oil. The weight ratio of PLA: TPS was fixed at 60:40. The black pepper essential oil (BP) was encapsulated in hydroxypropyl-beta-cyclodextrin (HPBCD) and maltodextrin-gum arabic (MG) using spray-drying technique. The BP-HPBCD and BP-MG varied as 10%, 15%, and 20% w/w. PLA/TPS, PLA/TPS/BP-HPBCD, and PLA/TPS/BP-MG thermoformed trays were successfully prepared by using thermoforming machine with a heating temperature of 340 °C, a heating time of 30 s, a vacuum time of 15 s and a cooling time of 15 s. PLA/TPS and PLA/TPS/BP-HPBCD thermoformed trays were pale yellow, whereas PLA/TPS/BP-MG thermoformed trays were yellow. Trays from PLA/TPS/BP-MG were easier to form in complete shape than those from PLA/TPS/BP-HPBCD using thermoforming machine. The loss percentage of active compounds in BP of PLA/TPS/BP-MG and PLA/TPS/BP-HPBCD thermoformed trays were determined by Gas Chromatography-Mass Spectrometry (GC-MS). The lowest loss of active compounds in BP were beta-caryophyllene and d-limonene, which lost in thermoforming step from PLA/TPS/BP-MG about 93.30-96.90% and 89.05-89.93%, respectively. Both thermoformed trays from PLA/TPS/BP-HPBCD and PLA/TPS/BP-MG tended to decompose when buried in the soil condition. PLA/TPS/BP-HPBCD and PLA/TPS/BP-MG have been potentially prepared and converted to biodegradable thermoformed trays.


Black pepper essential oil; Encapsulation; Poly(lactic acid); Thermoplastic cassava starch; Thermoforming trays

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