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CN-122011223-A - OSA starch and preparation method and application thereof

CN122011223ACN 122011223 ACN122011223 ACN 122011223ACN-122011223-A

Abstract

The invention discloses OSA starch and a preparation method and application thereof, belonging to the technical field of colloid chemistry in the fields of food, cosmetics and medicine, comprising the following steps of S1, mixing starch and water to obtain starch slurry; S2, stirring the starch slurry, heating for 15-25min at the temperature of 60-65 ℃ to obtain partially gelatinized starch slurry with the gelatinization degree of 55-65%, S3, cooling the partially gelatinized starch slurry, regulating the pH to 8-9, stirring, adding OSA for esterification reaction, regulating the pH to 6-7 after the reaction is finished, washing, centrifuging, freeze-drying and crushing to obtain OSA starch. According to the preparation method of the OSA starch, the partial gelatinized starch with the gelatinization degree of 55-65% is adopted to carry out esterification reaction with OSA, so that the OSA starch with high emulsifying activity, low energy consumption and excellent stability is prepared.

Inventors

  • ZHENG JINKAI
  • LIU ZIYING
  • SHANG MENGSHAN
  • Cui Jiefen
  • Yuan Yongkai
  • LIU TING
  • ZHOU SHUAISHUAI
  • LING YUE

Assignees

  • 青岛农业大学

Dates

Publication Date
20260512
Application Date
20260319

Claims (10)

  1. 1. The preparation method of the OSA starch is characterized by comprising the following steps of: and (3) carrying out esterification reaction on starch slurry with the gelatinization degree of 55-65% and octenyl succinic anhydride, and regulating the pH value to 6-7 to obtain octenyl succinic acid starch ester.
  2. 2. The method for preparing OSA starch according to claim 1, wherein the step of preparing the starch slurry having a gelatinization degree of 55% -65% comprises mixing starch with water to obtain starch slurry, stirring the starch slurry, and heating at 60-65deg.C for 15-25min to obtain starch slurry having a gelatinization degree of 55% -65%.
  3. 3. The method of claim 2, wherein the mass to volume ratio of starch to water is 20-25 g/400 mL, and the starch comprises waxy corn starch.
  4. 4. The method for producing OSA starch as claimed in claim 1, wherein the temperature of the esterification reaction is 25-40 ℃, the time of the esterification reaction is 2-5 hours, and the pH of the esterification reaction is 8-9.
  5. 5. The method for preparing OSA starch according to claim 1, wherein the mass volume ratio of octenyl succinic anhydride to starch is 0.4-0.6mL:20g, the octenyl succinic anhydride is diluted with ethanol, and the volume ratio of octenyl succinic anhydride to ethanol is 1:2-4.
  6. 6. An OSA starch characterized by: the OSA starch prepared by the method according to any one of claims 1-5.
  7. 7. Use of an OSA starch according to claim 6 as an emulsifier for the preparation of starch-based emulsions.
  8. 8. The method for preparing OSA starch according to claim 7, wherein the method comprises the steps of mixing an aqueous solution of starch octenyl succinate with an oil phase in a volume ratio of 8-9:1, and shearing and emulsifying to obtain the starch-based emulsion.
  9. 9. The use of OSA starch as claimed in claim 8, wherein the concentration of the aqueous solution of starch octenyl succinate is 1% -3% by mass.
  10. 10. The method of claim 8, wherein the oil phase comprises medium chain triglycerides.

Description

OSA starch and preparation method and application thereof Technical Field The invention relates to the technical field of colloid chemistry in the fields of foods, cosmetics and medicines, in particular to OSA starch and a preparation method and application thereof. Background Starch octenyl succinate (OSA starch) is a chemically modified starch prepared by esterification of starch with Octenyl Succinic Anhydride (OSA), and is widely used in various fields such as beverages, emulsified sauces, flavor microcapsules, etc. by virtue of excellent emulsifying property and safety as an important food-grade emulsifier. Currently, the manner of industrially producing OSA starch is mainly divided into two types: (1) The method has the advantages that the process is simple, the energy consumption is low, the reaction only occurs on the surface of starch particles, the substitution degree of products is low, the distribution is uneven, the emulsifying capacity of the products is limited finally, and the prepared emulsion has the problems of large particle size and poor stability. (2) The method takes completely gelatinized starch (the gelatinization degree is approximately equal to 100%) as a raw material, the method enables starch molecular chains to fully extend, OSA reagents and starch molecules to uniformly react, and the obtained product has good emulsion stability, however, the process has obvious short plates, on one hand, the energy consumption is high, the starch is required to be completely gelatinized through high temperature or high pressure conditions, on the other hand, the process feasibility is poor, the viscosity of a system after the complete gelatinization is increased, not only stirring and mixing are difficult, the mass transfer efficiency is reduced, but also the cost of a subsequent drying link is greatly increased. In view of the above, the prior art is difficult to match the urgent requirements of the current industry for green manufacturing and cost reduction and synergy. There is a need for an innovative OSA starch preparation technology that breaks through the traditional bottleneck of linear correlation between performance and energy consumption, yields high performance OSA starch without significantly increasing production cost and process complexity, and provides an efficient adaptation solution for the industry. Disclosure of Invention The invention aims to provide OSA starch, a preparation method and application thereof, and the high-performance OSA starch is prepared on the basis of not remarkably increasing production cost and process complexity. In order to achieve the above object, the present invention provides a method for preparing OSA starch, comprising the steps of: and (3) carrying out esterification reaction on starch slurry with the gelatinization degree of 55-65% and octenyl succinic anhydride, and regulating the pH value to 6-7 to obtain octenyl succinic acid starch ester. Preferably, the starch slurry has a degree of gelatinization of 60%. Preferably, the preparation process of the starch slurry with the gelatinization degree of 55-65% comprises the steps of mixing starch with water to obtain starch slurry, stirring the starch slurry, and heating the starch slurry for 15-25min at the temperature of 60-65 ℃ to obtain the starch slurry with the gelatinization degree of 55-65%. Further, the mass to volume ratio of starch to water is 20-25g:400mL, and the starch comprises waxy corn starch. Preferably, the temperature of the esterification reaction is 25-40 ℃, the time of the esterification reaction is 2-5h, and the pH of the esterification reaction is 8-9. Preferably, the mass volume ratio of octenyl succinic anhydride to starch is 0.4-0.6mL:20g, the octenyl succinic anhydride is diluted by ethanol, and the volume ratio of octenyl succinic anhydride to ethanol is 1:2-4. The invention also provides OSA starch, which is prepared by adopting the preparation method of the OSA starch. The invention also provides an application of the OSA starch, wherein the OSA starch is used as an emulsifier for preparing starch-based emulsion. Preferably, the preparation of the starch-based emulsion comprises the steps of mixing an aqueous solution of starch octenyl succinate with an oil phase according to a volume ratio of 8-9:1, and shearing and emulsifying to obtain the starch-based emulsion. Further, the mass concentration of the water solution of the starch octenyl succinate is 1-3%. Further, the oil phase comprises medium chain triglycerides. Therefore, the OSA starch and the preparation method and application thereof have the following beneficial effects: (1) According to the invention, the OSA starch with high emulsifying activity, low energy consumption and excellent stability is prepared by adopting starch slurry with 55% -65% of gelatinization degree to carry out esterification reaction with OSA. (2) The invention realizes 55-65% of the heating energy consumption required by partial