Physical Properties of Organogels Made of Rice Bran Wax and Vegetable Oils

Lakmali Samuditha K. Dassanayake, Dharma R. Kodali, Satoru Ueno, Kiyotaka Sato

Research output: Chapter in Book/Report/Conference proceedingChapter

7 Scopus citations

Abstract

This chapter presents the physical properties of organogel made of Rice Bran Wax (RBX) and vegetable oils, examined with thermal, structural, and optical methods. The physical properties of organogels formed by RBX and liquid oils in comparison with other typical plant waxes of Candellila Wax ( CLX) and Carnauba Wax (CRX) can be summarized as follows: (a) the rate of formation of organogels was highest for RBX gels, as determined by visual observation and viscosity-temperature relationships, (b) the hardness assessed by the penetration depth measurement was highest for RBX gels, (c) thermal stability expressed as the Tm of wax crystals in organogels was highest for RBX gels. These properties may be ascribed to the high crystallinity of RBX crystals having the highest δHm and δSm, whose values are similar to those of the PPP β form. As PPP crystals are tightly packed in the T// subcell, it is reasonable to assume that the RBX crystals are also tightly packed in the O subcell structures. The differences in the subcell structure may be responsible for the molecular differences between RBX and PPP structures. Furthermore, the crystal morphology of the needle-shaped RBX crystals in organogels may indicate a greater ability to entrap the liquid oils to form organogels. Crystallization kinetics and physical properties of organogels prepared by RBX and different. Furthermore, the crystal morphology of the needle-shaped RBX crystals in organogels may indicate a greater ability to entrap the liquid oils to form organogels.

Original languageEnglish (US)
Title of host publicationEdible Oleogels
Subtitle of host publicationStructure and Health Implications
PublisherElsevier Inc.
Pages149-172
Number of pages24
ISBN (Electronic)9781630670092
ISBN (Print)9780983079118
DOIs
StatePublished - Apr 15 2011

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