Milk Protein Concentrate-based Microencapsulation Wall Material and Microcapsules

Patent metadata

Field	Value
Publication number	US-2021101126-A1
Application number	US-202017123415-A
Country	US
Kind code	A1
Filing date	Dec 16, 2020
Priority date	Jun 27, 2018
Publication date	Apr 8, 2021
Grant date	—

Abstract

The disclosure discloses a milk protein concentrate-based microencapsulation wall material and microcapsules, and belongs to the technical field of microcapsule preparation. In the disclosure, liquid or solid microcapsules are prepared by performing cation exchange treatment on milk protein concentrates, and then using the treated milk protein concentrates as a wall material. The prepared microcapsules have good physical and chemical stability during storage, and are suitable for protecting active functional factors and to be applied in the fields of food, medicine, health care products, cosmetics, daily chemicals and the like.

First claim

What is claimed is:

1 . A microcapsule, comprising a wall material, wherein the wall material comprises a pretreated milk protein concentrate (MPC); and the pretreated MPC is prepared by a pretreatment performed by using any one of the following methods: ion exchange resin, addition of an exogenous reagent for acidity adjustment, and addition of an exogenous reagent for ion chelation.

2 . The microcapsule of claim 1 , wherein a mass ratio of the ion exchange resin to the MPC to be treated in dry weight is 1:30-3:1.

3 . The microcapsule of claim 1 , wherein an ion exchange resin treatment is performed by adding 0.1-30 g of the ion exchange resin to 100 g of a protein solution, and stirring the mixed solution for a period of time for treatment.

4 . The microcapsule of claim 1 , wherein the ion exchange resin is strongly acidic cation-exchange resin Amberlite SR1L Na.

5 . The microcapsule of claim 1 , wherein the addition of the exogenous reagent for acidity adjustment is performed by adding a food-grade acidifier to a protein solution to lower a pH of a protein, and then performing an ultrafiltration process to obtain the pretreated MPC.

6 . The microcapsule of claim 1 , wherein the addition of the exogenous reagent for ion chelation is performed by adding a food-grade ion chelating agent to a protein solution.

7 . The microcapsule of claim 1 , wherein the pretreatment is performed until a decalcification rate is 45% or above.

8 . The microcapsule of claim 1 , wherein when the ion exchange resin is used, a mass ratio of the ion exchange resin to the MPC to be treated in dry weight is 1:30-3:1; and the pretreatment is performed until a decalcification rate is 45% or above.

9 . The microcapsule of claim 1 , wherein the microcapsule is liquid or solid.

10 . The microcapsule of claim 9 , wherein the microcapsule is prepared by a method comprising:
after a pretreated MPC solution or a protein solution of a certain concentration prepared from spray-dried powder of the MPC solution is accurately homogenized for many times at 10-50 MPa, adding a core material according to a mass ratio of the core material to the wall material=1:50-1:1 (w/w); after uniform stirring, performing dispersion by a high-speed shearing disperser; and then homogenizing the mixture for 2-6 times at a pressure of 10-50 MPa to obtain a uniform emulsion, i.e., a liquid microcapsule.

11 . The microcapsule of claim 10 , wherein the microcapsule is solid; the microcapsule is prepared by a method comprising: spray-drying or freeze-drying the emulsion immediately to prepare microcapsule powder; the spray-drying is performed at an inlet temperature of 120-160° C. and an outlet temperature controlled unchanged at 60-90° C. by adjusting a flow of atomizing gas and a speed of a peristaltic pump; and the freeze-drying is performed by freezing the liquid emulsion into a solid state under liquid nitrogen or at -80° C. with a freeze dryer to prepare the freeze-dried microcapsule powder.

12 . The microcapsule of claim 1 , wherein a core material is any one of environmentally sensitive active factor, volatile substances, and substances that need to change a gas or liquid existence form to a solid application form.

13 . The microcapsule of claim 2 , wherein a core material is any one of environmentally sensitive active factor, volatile substances, and substances that need to change a gas or liquid existence form to a solid application form.

14 . The microcapsule of claim 3 , wherein a core material is any one of environmentally sensitive active factor, volatile substances, and substances that need to change a gas or liquid existence form to a solid application form.

15 . The microcapsule of claim 4 , wherein a core material is any one of environmentally sensitive active factor, volatile substances, and substances that need to change a gas or liquid existence form to a solid application form.

16 . The microcapsule of claim 5 , wherein a core material is any one of environmentally sensitive active factor, volatile substances, and substances that need to change a gas or liquid existence form to a solid application form.

17 . The microcapsule of claim 6 , wherein a core material is any one of environmentally sensitive active factor, volatile substances, and substances that need to change a gas or liquid existence form to the solid application form.

18 . The microcapsule of claim 7 , wherein a core material is any one of environmentally sensitive active factor, volatile substances, and substances that need to change a gas or liquid existence form to a solid application form.

19 . The microcapsule of claim 8 , wherein a core material is any one of environmentally sensitive active factor, volatile substances, and substances that need to change a gas or liquid existence form to a solid application form.

Assignees

• Univ Jiangnan

Inventors

• Zhou Peng
• Hu Jinhua
• Zhuang Fengchen
• Li Xiang
• Jin Yuejie
• Zhang Chaoyue
• Cheng Minjun
• Liang Yongxue

Classifications

• B01F23/4143

  Microemulsions · CPC title

• B01F23/809

  Freezing the mixture · CPC title

• B01F23/804

  Drying the mixture · CPC title

• B01F23/413

  Homogenising a raw emulsion or making monodisperse or fine emulsions · CPC title

• B01F23/4105

  Methods of emulsifying · CPC title