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Method for modification of lotus-seed starch

A technology of lotus seed starch and dry heat denaturation, which is applied in flexible coverings, climate change adaptation, climate sustainability, etc., can solve problems such as poor mechanical properties, achieve improved production efficiency, high yield, and expand the scope of application Effect

Active Publication Date: 2011-10-12
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the edible film formed by native starch has poor mechanical properties, so people usually improve the physical and mechanical properties of starch film by adding a small amount of water-soluble polysaccharide to starch or modifying starch.

Method used

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  • Method for modification of lotus-seed starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Mixing of raw materials: Weigh 0.2g xanthan gum and add it to 40mL deionized water, stir until the ion gel is fully swollen, add 19.8g lotus seed starch, stir for 30min to make it evenly mixed;

[0019] (2) adjust pH: adjust the pH of the mixed solution to be 5;

[0020] (3) Drying: place in an oven and dry at 45°C until the moisture content is below 10%, grind and pulverize through an 80-mesh sieve;

[0021] (4) Dry heat: place the sieved starch in a 130°C oven for dry heat denaturation for 2 hours to obtain xanthan gum dry heat denatured lotus seed starch.

[0022] When 1.0% xanthan gum was used to dry heat denature lotus seed starch, the gelatinization viscosity of lotus seed starch could be increased and the peak viscosity decreased. Therefore, according to the requirements of the application, the dry heat denaturation conditions can be changed to produce lotus seed modified starch with different gelatinization properties.

Embodiment 2

[0024] (1) Mixing of raw materials: Weigh 0.2g of sodium alginate and add it to 40mL of deionized water, stir until the ion gel is fully swollen, add 19.8g of lotus seed starch, stir for 30min to make it evenly mixed;

[0025] (2) adjust pH: adjust the pH of the mixed solution to be 7;

[0026] (3) Drying: place in an oven and dry at 45°C until the moisture content is below 10%, grind and pulverize through an 80-mesh sieve;

[0027] (4) Dry heat: put the sieved starch in an oven at 130°C for dry heat denaturation for 3 hours to obtain sodium alginate dry heat denatured lotus seed starch.

Embodiment 3

[0029] (1) Mixing of raw materials: Weigh 0.3g of carrageenan and add it to 40mL of deionized water, stir until the ion gel is fully swollen, add 19.7g of lotus seed starch, stir for 30min to make it evenly mixed;

[0030] (2) adjust pH: adjust the pH of the mixed solution to be 8;

[0031] (3) Drying: place in an oven and dry at 45°C until the moisture content is 10%, grind and pulverize through an 80-mesh sieve;

[0032] (4) Dry heat: place the sieved starch in a 130°C oven for dry heat denaturation for 3 hours to obtain carrageenan dry heat denatured lotus seed starch.

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Abstract

The invention provides a method for the modification of lotus-seed starch, which comprises the steps of: mixing raw materials, adjusting the pH value of the mixture, drying, and dry-heating to obtain a finished product. In the invention, the lotus-seed starch is modified by using a method of combining ionic gum addition with dry-heat treatment, thus the physical properties and the eating quality of the lotus-seed starch are effectively improved and the applicable scope of the lotus-seed starch is widened; the method has the advantages of simple process, high yield, shortened modification time, increased production efficiency, good safety and no pollution. The modified lotus-seed starches with different pasting properties, rheological properties and film forming properties can be prepared according to the type and the consumption of the ionic gum and different reaction pHs so as to meet different application demands. As a new method for modifying starch physically, a dry heat method has the advantages of combining the superiorities of heat treatment and dry process and opening up a new way for the production of modified starch; besides, the technology is liable to be controlled in real time, so that continuous and automated clean production can be realized.

Description

technical field [0001] The invention belongs to the technical field of modified starch production, and more relates to a method for modifying starch by using a dry heat method. Background technique [0002] Lotus seed is a unique germplasm resource in my country, which is rich in nutrients and functional ingredients, and its processing is highly valued by people. Lotus seeds are high-starch agricultural products, with a high amylose content of more than 40%, so it has potential value for the development and research of lotus seed starch. Due to the limitations of its own characteristics, the application of native starch in the food industry is limited. Using physical, chemical or enzymatic treatment to denature lotus seed starch can improve the properties of lotus seed starch and expand its application range. The currently widely used denaturation method is chemical method, but many chemical reagents will be introduced in the chemical modification process, the treatment pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L5/00C08L5/04C08J5/18B65D65/46
CPCY02A40/90Y02W90/10
Inventor 郑宝东张帆林鸳缘曾绍校张怡田玉庭彭彬
Owner FUJIAN AGRI & FORESTRY UNIV