title: Thermal profiles, crystallization behaviors and microstructure of diacylglycerol-enriched palm oil blends with diacylglycerol-enriched palm olein.
abstract: To elucidate the possible interaction mechanisms between DAG-enriched oils, this study investigated how mixtures of DAG-enriched palm-based oils influenced the phase behavior, thermal properties, crystallization behaviors and the microstructure in binary fat blends. DAG-enriched palm oil (PO-DAGE) was blended with DAG-enriched palm olein (POL-DAGE) in various percentages (0%, 10%, 30%, 50%, 70%, 90%, 100%). Based on the observation of iso-solid diagram and phase diagram, the binary mixture of PO-DAGE/POL-DAGE showed a better compatibility in comparison with their corresponding original blends. DSC thermal profiles exhibited that the melting and crystallization properties of PO-DAGE/POL-DAGE were distinctively different from corresponding original blends. Crystallization kinetics revealed that PO-DAGE/POL-DAGE blends displayed a rather high crystallization rate and exhibited no spherulitic crystal growth. From the results of polarized light micrographs, PO-DAGE/POL-DAGE blends showed more dense structure with very small needle-like crystals than PO/POL. X-ray diffraction evaluation revealed when POL-DAGE was added in high contents to PO-DAGE, above 30%, β-polymorph dominated, and the mount of β' forms crystals was decreasing.
authors.affiliation: School of Food Science and Technology, Jiangnan University, Oil and Plant Protein Center, Wuxi, Jiangsu Province, PR China.
authors.forename: Yayuan
authors.initials: Y
authors.lastname: Xu
authors.affiliation: School of Food Science and Technology, Jiangnan University, Oil and Plant Protein Center, Wuxi, Jiangsu Province, PR China.
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Zhao
authors.affiliation: Wuxi COFCO Engineering & Technology Co., Ltd, Wuxi, Jiangsu Province, PR China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wang
authors.affiliation: School of Food Science and Technology, Jiangnan University, Oil and Plant Protein Center, Wuxi, Jiangsu Province, PR China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Peng
authors.affiliation: School of Food Science and Technology, Jiangnan University, Oil and Plant Protein Center, Wuxi, Jiangsu Province, PR China. Electronic address: 690254409@qq.com.
authors.forename: Cao
authors.initials: C
authors.lastname: Dong
mesh_terms: D003460:Crystallization; D004075:Diglycerides / Q000737:chemistry*; D000073878:Palm Oil; D010938:Plant Oils / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: C011439:1,2-diacylglycerol; D004075:Diglycerides; D010938:Plant Oils; D000073878:Palm Oil
keywords: Crystallization behavior; Diacylglycerol-enriched blends; Microstructure; Palm oil; Palm olein; Phase behavior; Thermal properties