Walnut oil microcapsule and preparation method thereof

A technology of walnut oil and microcapsules, applied in the field of walnut oil microcapsules and its preparation, to achieve the effects of enhancing stability, delaying oxidative deterioration, and high embedding rate

Active Publication Date: 2022-04-22
YUNNAN AGRICULTURAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In view of the deficiencies in the prior art, the present invention provides a walnut oil microcapsule and a preparation method thereof. The present invention uses glycosylated modified walnut protein isolate as the main wall material for microcapsule embedding of walnut oil. High embedding rate, strong flavor, not easy to stick, thick microcapsule wall, can effectively delay the oxidative deterioration of walnut oil, improve the storage stability of walnut oil, broaden new ideas for the application field of walnut protein, and also solve the problem of walnut protein Problems that limit its application due to poor solubility

Method used

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  • Walnut oil microcapsule and preparation method thereof
  • Walnut oil microcapsule and preparation method thereof
  • Walnut oil microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Degreased walnut meal

[0058] The walnut meal was dried at 55°C to a constant weight, and then crushed to 100 mesh with a traditional Chinese medicine grinder. The walnut meal was degreased with n-hexane under constant magnetic stirring (the ratio of walnut meal / n-hexane was 1:10w / v) for 1.5h. The solution was filtered through filter paper under reduced pressure, and the filter residue was degreased repeatedly with n-hexane until the filtrate was clear. The filter residue was air-dried in a fume hood and ground to obtain defatted walnut meal powder (DFWF), which was stored at -18°C. The protein content in DFWF was 57.05%. , 2.54% fat, 2.61% ash, and 9.05% moisture.

[0059] Extraction of WNPI

[0060] Dissolve DFWF in distilled water adjusted to pH 11 with 1M NaOH (the ratio of solid to liquid is 1:20w / v), stir with a magnetic stirrer for 2 hours, and then centrifuge the solution at 4°C (4500rpm, 30min) , the precipitate was redissolved in distilled water with a pH v...

Embodiment 2

[0105] According to the optimal process parameters: WNPI-M addition 26.46%, corn syrup addition 21%, walnut oil 30%, spray drying inlet air temperature 175 ℃, prepared WNPI-M walnut oil microcapsules. The modified whey protein and WNPI of the same quality were used instead of WNPI-M as a control, and the modified whey protein was prepared by referring to the existing method, which was prepared by glycosylation reaction of whey protein and xylose at a ratio of 2:1.

[0106] Determination of Physical and Chemical Indexes of Walnut Oil Microcapsules

[0107] (1) Determination of surface oil content: Accurately weigh a certain mass of walnut oil microcapsule samples in a dry beaker, add petroleum ether to extract the oil on the surface of the microcapsules (w / v 1:10), and gently stir the petroleum ether through a pump filter device into a constant weight round bottom flask. The petroleum ether was evaporated to dryness using a rotary evaporator and dried in an oven at 60°C until ...

Embodiment 3

[0128] The determination of the conditions of embodiment 3 walnut protein glycosylation reaction

[0129] Mix WNPI with sugar (glucose, maltose, lactose, maltodextrin, dextran (40KDa)) in different ratios (sugar to protein ratio 3:1, 2:1, 1:1, 1:2, 1:3 ), dissolved in distilled water, and prepared into a solution with a concentration of (5mg / mL, 10mg / mL, 15mg / mL, 20mg / mL, 25mg / mL, 30mg / mL), adjust the pH value of the system to 8.45-8.5, and keep the magnetic force constant Stir for 1 hour to fully mix and then place it at 4°C for 12 hours to fully hydrate it. Under sealed conditions, react in a water bath at 80°C for a certain period of time (0h, 2h, 4h, 6h, 8h, 10h), quickly cool down to room temperature to end the reaction, and then dialyze with distilled water at 4°C for 24h to remove unreacted sugar. The glycosylated product of WNPI was obtained by freeze-drying.

[0130] Grafting degree of different sugar species and WNPI

[0131] The molecular weight of sugar and the ...

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Abstract

The invention discloses a walnut oil microcapsule and a preparation method thereof, the walnut oil microcapsule is prepared by using walnut oil, sucrose fatty acid ester, sodium stearoyl lactylate, modified walnut protein isolate and corn syrup as raw materials through microcapsule emulsification and spray drying; the modified walnut protein isolate is obtained by performing glycosylation reaction modification on maltodextrin and walnut protein isolate; the ratio of the raw materials is as follows: 25-28% of modified walnut protein isolate, 20-23% of corn syrup, 25-32% of walnut oil, 0.5-3% of sucrose fatty acid ester, 0.5-3% of sodium stearoyl lactylate and the balance of water. The glycosylated and modified walnut protein is applied to the microcapsule embedding of the walnut oil, so that the oxidative deterioration of the walnut oil is effectively delayed, and the storage stability of the walnut oil is improved. The walnut oil provided by the invention can provide two nutritional ingredients of walnut protein and walnut oil at the same time, and the microcapsule is high in nutritional value and can be used as non-dairy creamer to be applied to a food system.

Description

technical field [0001] The invention relates to the technical field of vegetable oil microcapsules, in particular to a walnut oil microcapsule and a preparation method thereof. Background technique [0002] Walnut (Juglaus Regia L.) has another name called walnut, Qiang peach, long live seed, is Juglandaceae walnut plant, is one of world's four major dried fruits, and is known as the laudatory title of " king of woody oil plants ". As one of the origins of walnuts in the world, China ranks first in the world in terms of walnut planting area and output. The planting area and output of walnuts in my country are increasing year by year. In 2017, the planting area of ​​walnuts in China exceeded 60 million mu, and the output exceeded 3.3 million tons. Yunnan is the largest province of walnut production in my country. The walnut planting area is about 42.3 million mu, and its output, output value and planting area all rank first in the country. There is a serious shortage of proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L33/115A23P10/30B01J13/04
CPCA23L33/115A23P10/30B01J13/043A23V2002/00A23V2200/224A23V2250/18A23V2250/548
Inventor 盛军田洋陶亮周艳赵存朝汤木果代佳和
Owner YUNNAN AGRICULTURAL UNIVERSITY
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