Method for preparing fatty acid stephanoporate starch ester and application thereof

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 The invention discloses 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 performed to compound modified starch, which belongs to the technical field of modified starch. technical background 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 prepare esterified ...

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Problems solved by technology

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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