Pickering emulsion prepared from OSA modified corn starch spherocrystals
A technology of corn starch and hydrophobically modified starch, which is applied in the field of preparation of Pickering emulsion and starch spherulites, can solve the problems of human body and environmental hazards, and achieve good stability
Inactive Publication Date: 2022-07-08
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
However, due to the problems of biodegradability and biocompatibility, some synthetic low-molecular-weight surfactants may be potentially harmful to the human body and the environment, and their applications in the food and pharmaceutical industries are greatly limited. Particle-stabilized emulsions can Avoid the use of certain hazardous surfactants associated with tissue irritation and environmental contamination
Method used
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[0029] Preparation of Pickering Emulsion: Weigh a quantitative sample of hydrophobically modified starch spherulites and disperse them in distilled water. Use a high-speed homogenizer (T18, IKA works, Wilmington, USA) to homogenize at 12,000 r / min for 1 min to make the starch sample uniform. Suspended. According to different oil-water ratios (70%, 75%), the oil phase was added and homogenized for 5 minutes to obtain Pickering emulsion. The prepared emulsion was measured by a laser particle size analyzer for the size of the emulsion droplets, and the size of the emulsion droplets was measured between 10-30 μm. The emulsion was stored at room temperature for 6 months, and the EI value was 100%, and no demulsification and separation occurred. The emulsion has good stability and can effectively resist the coalescence of emulsion droplets.
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The invention provides a green renewable material, namely OSA modified starch spherocrystal, which can stabilize a Pickering emulsion at a high oil phase ratio. Common corn starch is subjected to enzymolysis, acidolysis and recrystallization to obtain starch spherocrystals, then OSA hydrophobic modification is carried out to obtain OSA starch spherocrystals, the starch particles are used as an emulsifier to prepare a Pickering emulsion, the addition amount is 1.5% wt, and the OSA starch spherocrystals can stabilize the emulsion for 6 months without demulsification under high oil phase ratio (70%) and high internal phase emulsion (75%) and show good stability. The result of the invention provides an important reference for stabilizing the Pickering emulsion by using the novel modified starch base as the emulsifier, and can be widely applied to the fields of food, cosmetics and the like.
Description
Technical field: [0001] The invention relates to a preparation method of Pickering emulsion, in particular to starch spherulites obtained by processing common corn starch, and then performing OSA hydrophobic modification on the starch spherulites to prepare Pickering emulsion. Background technique: [0002] Pickering emulsions were independently observed by Ramsden in 1903 and Pickering in 1907, respectively, that solid colloidal particles can stabilize the interface between two immiscible phases, such as fine clays. Later, Pickering et al. conducted further research on the mechanism of emulsion stabilization, so it was called Pickering emulsion. Compared with traditional stabilized emulsions such as surfactants, emulsions stabilized by solid particles have good resistance to coalescence and resistance to Ostwald ripening. In recent decades, the research results on Pickering emulsions have grown exponentially. Compared with the research progress of inorganic and synthetic p...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C08B33/02C08B33/00C08J3/03C08L3/16C12P19/04C12P19/14
CPCC08B33/02C08B33/00C08J3/03C12P19/04C12P19/14C08J2303/16Y02A40/90
Inventor 王书军郑葆鑫
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY