Sorbitol-based deep eutectic solvents, methods of making and use in starch film preparation

By forming a multiple hydrogen bond network between sorbitol-based eutectic solvent and starch molecules, the problems of plasticizer migration and loss and poor compatibility in starch films are solved, achieving high-efficiency plasticization and long-term stability of starch films, which are suitable for the food and pharmaceutical fields.

CN122356579APending Publication Date: 2026-07-10SHANDONG DAZECHENG BIOTECHNOLOGY CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG DAZECHENG BIOTECHNOLOGY CO LTD
Filing Date
2026-04-23
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing starch film plasticizers have problems such as strong hydrophilicity, easy migration and loss, insufficient biocompatibility, and poor film uniformity, which limit their application in the food and pharmaceutical fields. In addition, traditional eutectic solvent components have poor compatibility and cannot achieve both high plasticizing efficiency and long-term stability.

Method used

Sorbitol was used as the hydrogen bond donor, and betaine, tetrabutylammonium chloride or lysine was used as the hydrogen bond acceptor. A one-step heating and stirring method was used to prepare a sorbitol-based eutectic solvent for the plasticizing modification of starch films, forming a multi-layer hydrogen bond network to improve the flowability and compatibility of starch molecules.

Benefits of technology

The prepared sorbitol-based eutectic solvent is safe and non-toxic, and the process is simple. It can significantly improve the film-forming and mechanical properties of starch films, achieve high elongation at break and tensile strength, and maintain stable performance over a long period of time. It is suitable for the food and pharmaceutical fields.

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Abstract

This invention proposes a sorbitol-based eutectic solvent, its preparation method, and its application in starch film preparation, belonging to the field of eutectic solvent preparation technology. Using sorbitol as a hydrogen bond donor and any one of betaine, tetrabutylammonium chloride, or lysine as a hydrogen bond acceptor, the raw materials are weighed according to a molar ratio of hydrogen bond donor to hydrogen bond acceptor of 1:1 to 3:1. The mixture is placed in a dry reaction vessel and heated and stirred until the mixture is completely melted to form a bubble-free, precipitate-free, homogeneous, transparent viscous liquid. Heating is then stopped, and the mixture is allowed to cool naturally to room temperature to obtain the sorbitol-based eutectic solvent. The prepared sorbitol-based eutectic solvent has the advantages of green and non-toxic raw materials, excellent biocompatibility, wide application scenarios, simple preparation process, green economy, and easy large-scale production. The prepared sorbitol-based eutectic solvent can form multiple strong hydrogen bonds with starch molecules, effectively disrupting the dense hydrogen bond network between starch molecular chains and significantly improving the fluidity of starch molecular chains.
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