Method for preparing fatty acid starch ester and application

A fatty acid and starch ester technology, applied in the field of modified starch, can solve the problems of affecting product quality, local reaction, long reaction time, etc., and achieve the effects of good freeze-thaw stability, easy adjustment and control, and continuous reaction process.

Inactive Publication Date: 2009-06-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, only the starch stearate produced by Cheng Fa and others using the water medium method is reported as a wet process in China. The main disadvantage of this process is that it produces a large amount of waste water, which will pollute the environment.
Among the dry processes are the high-temperature method adopted by Xu Aiguo, which consumes a large amount of heat energy and takes a long time to react; and the microwave method adopted by Shi Qiaoling. reaction, affecting product quality

Method used

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  • Method for preparing fatty acid starch ester and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of extrusion method prepares the method for fatty acid starch ester, comprises the following steps successively: take by weighing 300g (dry basis) cornstarch, 60mL hot dehydrated alcohol dissolves 9g stearic acid, makes catalyst with 2mol / L hydrochloric acid, and addition is 1.0 mL, and then fully mixed with starch in a blender, evaporated ethanol at 50°C, and adjusted the water to 26%. The feeding speed of the extruder is 100g / min, the sleeve temperature of each section of the extruder (from the feed to the discharge end) is 30°C in the first section, 60°C in the second section, 90°C in the third section, and 120°C in the fourth section , the screw speed is 100r / min, cooled and pulverized to obtain the finished product. The type of screw extruder used is a twin-screw extruder, and it is a full-mesh type.

[0033] Compare as shown in table 1 with the prepared starch stearate and the starch stearate performance prepared by microwave method and high temperature me...

Embodiment 2

[0039] A kind of extrusion method prepares the method for starch stearate, comprises the following steps successively: take by weighing 300g (dry base) wheat starch, 60mL hot dehydrated alcohol dissolves 12g stearic acid, makes catalyzer with 2mol / L hydrochloric acid, addition 0.4mL, then fully mixed with starch in a blender, evaporated ethanol at 50°C, and adjusted the water to 20%. The feeding speed of the extruder is 125g / min, the sleeve temperature of each section of the extruder (from the feed to the discharge end) is 50°C in the first section, 80°C in the second section, 110°C in the third section, and 140°C in the fourth section , the screw speed is 120r / min, cooled and pulverized to obtain the finished product. The type of screw extruder used is a single screw extruder.

Embodiment 3

[0041] Use oleic acid as the esterification agent, rice starch as raw material, all the other formulas and operating conditions are the same as in Example 1 or Example 2, to obtain the finished starch oleate ester.

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Abstract

The invention relates to a preparation method for a fatty acid starch ester and application thereof, which belongs to the technical field of modified starch. According to the invention, starch is adopted as a raw material and fatty acid is taken as an esterification agent; and on the condition of taking an extruder as a chemical reactor, the acidolysis and esterification modification of the starch is carried out to prepare the fatty acid starch ester product with the low substitution degree. The fatty acid which is subjected to the high temperature high pressure high shearing action treatment of the extruder has an esterification reaction with crude starch according to a certain proportion; and due to the introduction of the hydrophobic organic carbon chain, the starch has the lipophilicity and hydrophilicity, and consequently has certain emulsibility. The product can be used as a stabilizer, an emulsifier, a gelling agent, a fat substitute, a microcapsule wall material, and the like in the food industry, and can be applied to the foods such as artificial butter, salad seasoning matter, bakery products, diary products, and the like. The invention has the advantages that the extruder is adopted to prepare the esterified starch; the reaction process is continuous and has simple operation, easy implementation and little environmental pollution; and the obtained product has excellent performance.

Description

technical field [0001] A preparation method and application of fatty acid starch ester belong to the technical field of modified starch. Background technique [0002] The principle of producing fatty acid starch ester by extrusion method is explained as follows: under the high temperature, high pressure and high shear of the extruder, the raw starch and fatty acid undergo a direct Fischer esterification reaction under the catalysis of an acidic catalyst. In this reaction, the acid is not only a catalyst for the esterification reaction, but also degrades the starch, resulting in the shortening of the starch molecular chain, the destruction of the branch structure of the amylopectin, the reduction of the reaction space barrier, and the increase of the esterification reaction opportunities between fatty acids and starch. [0003] In foreign countries, more research work on fatty acid starch esters has been carried out, especially in the United States and Japan. As early as the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04A23L1/03A23L1/035A23L1/05A23L29/00A23L29/10A23L29/20
Inventor 张燕萍刘凤茹
Owner JIANGNAN UNIV
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