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Preparation method of polyvinyl alcohol-sodium alginate gel actuating film

A sodium alginate and polyvinyl alcohol technology, applied in gel preparation, chemical instruments and methods, colloid chemistry, etc., can solve the problems of difficult control of cross-linking dose and uneven cross-linking, and achieve easy control, improved water retention, The effect of high mechanical strength

Pending Publication Date: 2021-10-22
HARBIN ENG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is easy to cause uneven cross-linking, and the cross-linking dosage is not easy to control, and the cross-linked product is easily affected by factors such as pH value, temperature, reaction time, etc.

Method used

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  • Preparation method of polyvinyl alcohol-sodium alginate gel actuating film

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specific Embodiment approach 2

[0025] Specific implementation mode two: combined with attached figure 1 The invention discloses a method for preparing a polyvinyl alcohol-sodium alginate gel actuated film by vacuum heating-freeze drying, and the alcoholysis degree of the polyvinyl alcohol used in the method is 96%-98%. The distilled water used in the preparation process is obtained by using a distilled water machine in the laboratory. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

specific Embodiment approach 3

[0026] Specific implementation mode three: combined with attached figure 1 Instructions, when drying to form a film, after taking it out of the freeze dryer, it needs to be thawed at room temperature for 1 hour, then placed in the vacuum dryer, and dried at 40 degrees Celsius for 2 hours. During this period, the vacuum function is not turned on, and When drying in a vacuum drying oven for the second time, the door of the drying oven needs to be opened every 20 minutes to release the water vapor during the drying process. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

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Abstract

The invention provides a preparation method of a polyvinyl alcohol-sodium alginate gel actuating membrane. The method comprises the following steps: dissolving polyvinyl alcohol in distilled water at a high temperature, weighing sodium alginate, dissolving in a polyvinyl alcohol solution, adding glycerol after the sodium alginate is completely dissolved, fully stirring, defoaming, pouring into a mold, after a vacuum heating-freeze drying method, demolding, and cutting to obtain a polyvinyl alcohol-sodium alginate gel actuating film. The method comprises the following five steps: preparing a polyvinyl alcohol solution, preparing a polyvinyl alcohol-sodium alginate solution, defoaming, drying to form a film, cutting a piece, and storing. According to the invention, the phenomenon that polyvinyl alcohol and sodium alginate molecules are difficult to dissolve due to hydrogen-bond interaction when water is used as a solvent is relieved, and the crystallinity of the polyvinyl alcohol molecules is effectively reduced; when the actuating film is prepared, a homogeneous solution is easier to form under the low-temperature action of a freeze dryer; and after freezing, secondary drying in a vacuum drying box can slowly evaporate residual moisture, so that uniform film formation of an internal structure is facilitated.

Description

technical field [0001] The invention relates to a preparation method of a biological gel film, in particular to a preparation method of a polyvinyl alcohol-sodium alginate gel actuated film. Background technique [0002] Bionic artificial muscle is a new type of flexible actuator that uses the principle of bionics to imitate human muscle movement. On the basis of using bionics, many scholars have intersected the disciplines of machinery and materials, and expanded the research scope of bionic artificial muscles. In recent years, bionic artificial muscles have developed rapidly. Among them, electro-actuated polymer materials are more and more used in the preparation process of bionic artificial muscles, such as polyvinyl alcohol, polyacrylamide, resin and other materials, and their research results are widely used in aerospace, underwater equipment, bionic muscles , biomedical engineering and many other fields have a wide range of applications. The invention relates to a bi...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/04C08L29/04C08K5/053B01J13/00
CPCC08J5/18B01J13/0065C08J2305/04C08J2429/04C08K5/053
Inventor 贾炜坤王岚赵刚房付健徐岩马雪岩
Owner HARBIN ENG UNIV