Method for preparing fatty acid stephanoporate starch ester and application thereof
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A technology of porous starch and fatty acid, applied in the field of modified starch, to achieve the effects of easy implementation, increased hydrophobicity, and simple operation
Inactive Publication Date: 2008-12-10
JIANGNAN UNIV
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And about taking long-chain fatty acid as esterifying agent, porous starch is the denaturation process of raw material dry synthesis porous starch ester of stearate and has not been reported so far
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Embodiment 1
[0024] Example 1: Weigh 100g (dry basis) cornstarch, place it in 170mL of disodium hydrogen phosphate-citric acid buffer solution with a pH value of 4.6, and measure 15mL compound enzyme solution at the same time, and use 30mL buffer solution to make enzyme solution , poured into the starch suspension and stirred for 24 hours, adding sodium hydroxide to stop the reaction, centrifuging to remove the supernatant, washing, drying, and crushing to obtain a porous starch sample.
[0025] Weigh 3g of stearic acid, dissolve it in 60mL of 60°C dehydrated ethanol, slowly add it to 100g of porous starch (dry basis), add 0.06g of hydrochloric acid, stir well, and obtain a uniform mixture slurry, sieve, and dry Ethanol, water was added to adjust the water mass fraction to 20%, the resulting mixed reactant was placed in a pressure cooker, and esterification was carried out at 130° C. for 3 hours, cooled and pulverized to obtain corn porous starch stearate.
[0026] Compare the properties o...
Embodiment 2
[0030] Example 2: Weigh 100g (dry basis) cornstarch, place in 160mL pH value of 4.6 disodium hydrogen phosphate-citric acid buffer, and measure 18mL compound enzyme solution at the same time, use 40mL buffer to make enzyme solution , poured into the starch suspension and stirred for 24 hours, adding sodium hydroxide to stop the reaction, centrifuging to remove the supernatant, washing, drying, and crushing to obtain a porous starch sample.
[0031] Weigh 3g of stearic acid, dissolve it in 60mL of 60°C absolute ethanol, slowly add it to 100g of porous starch (dry basis), add 0.1g of acetic acid, stir well, and obtain a uniform mixture slurry, sieve, and dry Ethanol, water was added to adjust the water mass fraction to 20%, the resulting mixed reactant was placed in a pressure cooker, and esterification was carried out at 130° C. for 3 hours, cooled and pulverized to obtain corn porous starch stearate.
Embodiment 3
[0033] Cornstarch was used as raw material, stearic acid was used as esterification agent, and the esterification reaction temperature was 150° C., and the rest of the formula and operating conditions were the same as those in Example 1 or Example 2 to obtain the finished porous cornstarch stearate.
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Abstract
The invention relates to a method for preparing fatty acid porous starch ester and an application of the fatty acid porous starch ester, belonging to the modified starch technical field. The method performs enzymolysis on native starch at first to prepare porous starch, and then performs acidolysis and esterification for composition of modified starch, so as to prepare fatty acid porous starch ester products with low degree of substitution. The products have strong adsorptivity which is greatly improved compared with porous starch prepared by single acidolysis and starch ester prepared by single esterification, and can be applied in various fields of foodstuff, for example, the products can be used as a microcapsule material and used as an absorbent for absorbing various functional substances such as pennyroyal, edible essence, pigment, olive oil, probiotics and so on. By adoption of the fatty acid porous starch ester for absorbing a target substance, the function of slow release can be reached and the service efficiency can be improved. The method has the advantages that: the method takes the porous starch as a raw material and performs secondary esterification modification on the porous starch with strong adsorptivity; the whole reaction process is simple to operate and easy to implement and has small environmental pollution; and the products prepared have superior performance.
Description
technical field [0001] The invention relates to a preparation method and application of fatty acid porous starch ester. The original starch is firstly subjected to enzymatic hydrolysis to prepare porous starch, and then acid hydrolysis and esterification are carried out to compound modified starch, which belongs to the technical field of modified starch. technical background [0002] Fatty acid starch ester is an esterification product obtained by reacting starch and its derivatives with fatty acid, fatty acid methyl ester, fatty acid chloride or fatty acid anhydride. Due to the introduction of hydrophobic organic carbon chains, the hydrophobicity of esterified starch increases, which can greatly improve its adsorption performance. It can be used in many fields in food, such as microcapsule material, adsorbent, etc. There are few reports on the modification of porous starch as a raw material again. Only Xu Zhong et al. used phosphorus oxychloride as a crosslinking agent to ...
Claims
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