Preparation method of white tea seed oil microcapsules

Abstract

The invention discloses a preparation method of white tea seed oil microcapsules. The preparation method comprises the steps of drying white tea seeds until the water content is 15%, refining oil in an oil refining machine at 105 to 110 DEG C for 30 to 60 minutes, and filtering to obtain white tea seed oil; carrying out supercritical extraction on the filter residues to obtain a white tea seed extract; taking the white tea seed extract, Tween 60, cholesterol, soybean lecithin and ethanol as raw materials to prepare a white tea seed extract nano-liposome; taking the white tea seed extract nano-lipidosome and white tea rapeseed oil as core materials and maltodextrin and water-soluble wheat protein as wall materials, adding an auxiliary agent, and shearing in a shearing machine under normal pressure to obtain an emulsion; homogenizing the emulsion at 40 MPa, and performing spray drying to obtain powder, namely the white tea seed oil microcapsules. The original appearance characteristics of the tea seed oil are maintained. The long-term antioxidant effects of tea polyphenol, EGCG and the like are maintained. Grease rancidity is prevented. The nutritional value of grease is improved. The white tea seed oil microcapsules are convenient to store through microencapsulation.

Description

technical field [0001] The invention relates to the field of tea processing, in particular to a method for preparing white tea tea seed oil microcapsules. Background technique [0002] White tea is a kind of micro-fermented tea. It is a traditional famous tea created by Chinese tea farmers. After picking, it is not processed or rolled, but only dried in the sun or simmered. The white tea extract is rich in tea polyphenols and epigallocatechin. EGCG, flavonoids and other substances have pharmacological activities such as treating measles, anti-cancer, antibacterial, anti-oxidative damage, anti-aging and regulating immune function, and have significant anti-tumor, anti-cancer, and anti-mutation effects. There are few processed products on the market. [0003] Tea seed oil is the fruit of the tea tree that people drink tea in autumn and squeezed out. Because the yield of tea seed oil is very low and its nutritional value is rich, tea seed oil is also called "oil gold". Its VE ...

AI Technical Summary

Problems solved by technology

[0004] The tea polyphenols and EGCG contained in white tea have a very wide range of biological functions, such as anti-oxidation, anti-cancer, anti-cardiovascular disease and other effects. However, due to the instability of EGCG itself, it is easy to oxidize and deteriorate when exposed to the air. , leading to structural damage and weakened function. At the same time, because tea polyphenols and EGCG are water-soluble antioxidants, they cannot be directly dissolved in oil, so that tea polyphenols and other antioxidant components in tea seed oil are less. On the one hand, the oil is easy to rancid, On the other hand, it lacks tea polyphenols and EGCG nutrients. In the prior art, short-carbon chain fatty alcohols are used as fat-soluble solvents such as tea polyphenols, but this fat-soluble liquid tea polyphenols quickly appears turbid and volatile in vegetable oils. precipitation

[0005] Therefore the storage time of the white tea tea seed oil in the prior art is short, the antioxidant effect is poor, and the functional components are insufficient