Preparation method and application of chemically-modified arabic gum

A gum arabic, chemical modification technology, applied in the field of chemistry, can solve problems such as threats, and achieve the effect of promoting application, improving emulsifying properties and embedding properties

Inactive Publication Date: 2015-10-07
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, starch modified by octenyl succinic anhydride poses a certain threat to the gum arabic market
However, because gum arabic can effecti...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: A preparation method of chemically modified gum arabic, the steps are as follows:

[0023] (1) Preparation of gum arabic solution: Stir the gum arabic in a 60°C water bath until it is completely dissolved, take it out and let it cool to room temperature, adjust the solution to pH 8.0 with 3% (W / W) sodium hydroxide solution, filter with suction, and The filtrate was transferred to a large beaker. The preparation concentration is 20% gum arabic solution.

[0024] (2) Preparation of octenyl succinic anhydride solution: uniformly mix octenyl succinic anhydride and ethanol to prepare an octenyl succinic anhydride solution. The volume ratio of octenyl succinic anhydride to ethanol is 1:3.

[0025] (3) Esterification reaction: adjust the suction-filtered gum arabic solution to 50°C, slowly add the octenyl succinic anhydride solution to the gum arabic solution, and adjust the pH of the reaction solution to 8.0 with 3% sodium hydroxide solution. The reaction last...

Embodiment 2

[0027] Example 2: A preparation method of chemically modified gum arabic, the steps are as follows:

[0028] (1) Preparation of gum arabic solution: Stir the gum arabic in a water bath at 80°C until it is completely dissolved, take it out and let it cool to room temperature, adjust the solution to pH 7.5 with 3% (W / W) sodium hydroxide solution, filter with suction, and The filtrate was transferred to a large beaker. The preparation concentration is 30% gum arabic solution.

[0029] (2) Preparation of octenyl succinic anhydride solution: uniformly mix octenyl succinic anhydride and ethanol to prepare an octenyl succinic anhydride solution. The volume ratio of octenyl succinic anhydride to ethanol is 1:3.

[0030] (3) Esterification reaction: adjust the suction-filtered gum arabic solution to 60°C, slowly add the octenyl succinic anhydride solution to the gum arabic solution, and adjust the pH of the reaction solution to 7.5 with 3% sodium hydroxide solution. The reaction l...

Embodiment 3

[0032] Example 3: Evening primrose oil emulsion preparation, its steps are as follows:

[0033] (1) Preparation of gum arabic octenyl succinate solution: Dissolve 20g gum arabic octenyl succinate in 80g water (water bath 60°C) to prepare 20% (W / W) gum arabic octenyl succinate solution.

[0034] (2) Preparation of pre-emulsion: use it as an emulsifier, add 10 g of evening primrose oil to it, and immediately disperse with a disperser for 1 min to prepare an evening primrose oil pre-emulsion.

[0035] (3) High-pressure homogenization: Immediately pass through a high-pressure homogenizer (50MPa) for 2 minutes after the dispersion is completed.

[0036] Collection of emulsions, packaging, finished products.

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Abstract

The invention relates to a preparation method and application of chemically-modified arabic gum. The preparation method comprises the following steps: dissolving arabic gum in a 60-80-DEG C water bath to form an arabic gum solution of which the concentration is not lower than 10% (w/w) and not higher than 40% (w/w) and the pH value is 7.5-8.0, and slowly adding octenyl succinic anhydride into the arabic gum solution which is kept at 38-63 DEG C to perform esterification reaction, wherein in the reaction process, the pH value of the arabic gum solution is kept at 7.5-9.0, and the reaction is performed for 1-2.5 hours; and after the reaction finishes, regulating the pH value of the reaction solution to 6, and finally, drying to prepare the colorless odorless chemically-modified arabic gum with excellent emulsifying capacity and embedding property. The chemically-modified arabic gum is applicable to the aspects of emulsions, beverages, microcapsules, essences and the like.

Description

technical field [0001] The invention relates to a preparation method and application of chemically modified gum arabic, belonging to the field of chemistry. Background technique [0002] Gum Arabic, also known as gum arabic, is generally an amber dry powder obtained from the exudate of the trunk of the leguminous Acacia tree. Its main components are polymer polysaccharides, a small amount of protein and calcium, magnesium and potassium salts. It has good emulsifying properties, high concentration and low viscosity, and is widely used in the food and pharmaceutical industries. However, it is known that gum arabic alone cannot achieve satisfactory emulsifying properties. Due to the differences in the soil, climate and tree age of each country of origin, there is a considerable gap in the molecular weight and composition of gum arabic. In addition, starch modified by octenyl succinic anhydride poses a certain threat to the gum arabic market. However, because gum arabic can e...

Claims

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Application Information

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IPC IPC(8): C08B37/00C08J3/03C08L5/00B01J13/04
Inventor 石燕李翠涂宗财王辉王姝杰
Owner NANCHANG UNIV
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