Spray flow gel and preparation method thereof

Abstract

The invention relates to the technical field of hydrogel preparation, in particular to spray flow gel and a preparation method thereof.The preparation method includes the following steps of (1) addingfood natural macromolecules into deionized water and stirring at a certain temperature until the food natural macromolecules are completely swollen into a uniform solution; (2) enabling the swollen solution to form spray under the action of compressed air with certain pressure, and controlling the aperture of an outlet of a spray head to be 0.2-0.8 mm to form micron-scale liquid drops; (3) blowing with cold air with a certain temperature within the range of liquid drops to ensure that the liquid drops complete sol-gel conversion in the air; and collecting liquid drops after gel transformationby using a container with a certain temperature to obtain the spray flowing gel. The preparation method of the spray flow gel is different from a rotary shearing mode, the micron-scale small liquid drops are subjected to a gelling effect at the temperature far lower than a gel dissolving transition point through an air shearing mode, the preparation efficiency is high, and the industrial production is facilitated.

Description

technical field

[0001] The invention relates to the technical field of hydrogel preparation, in particular to a spray flow gel and a preparation method thereof. Background technique

[0002] A mobile gel is a suspension of gelled particles dispersed in a continuous medium or a loosely linked form of particles. The reason for its formation is that biological macromolecules cannot form an ordered network structure under the action of external force during the sol-gel transition process. This gel form has been extensively studied over the past few decades. Foods for various purposes can be designed and constructed by adjusting the microstructure of materials. This technology is expected to be widely used as a new type of food carrier such as 3D printed food and formula food for special medical purposes. At present, the commonly used flow gel preparation method is through the action of the shear field. For example, the cryogel is subjected to rotational shear during the coolin...

Examples

Embodiment 1

[0025] Add 1g of agar powder to 100ml of deionized water, stir in a water bath at 95°C for 2 hours, add it to the spray pot after fully swelling, start the air compressor, and spray through the spray head after the pressure reaches 0.2Mpa. 0.5mm. Start the fan to be refrigerated, and the generated cold air below 4°C will contact the spray, and the droplets will gel and fall into the collector to form a spray flow gel. The yield value measured by a rheometer is 11.2 Pa.

[0026] figure 1 The rheological spectrum of the spray flow 0.5% agar yield value prepared for this embodiment, as can be seen from the figure: the agar forms a semi-solid gel different from the static gel, and this gel has both solid gel The smoothness and flowability of liquid, and the high yield value endow it with good chewiness.

Embodiment 2

[0028] Add 1 g of sodium alginate powder to 100 ml of water, and bathe in water at 70 ° C for 2 hours; add 0.5 g of calcium chloride powder to 100 g of water, fully dissolve and set aside. The sodium alginate solution and the calcium chloride solution are sprayed through different spray heads, the spray heads are oppositely sprayed, the compressed air is 0.2Mpa, the spray hole diameter of the spray head is 0.5mm, and the distance between the spray heads is 1m, the two kinds of mist droplets collide with each other to form a gel, and In the process of falling, it is subjected to the shearing action of the air, resulting in the inability to form high-strength gel particles and forming flow gel particles with less hardness and irregular shape. The collected samples were measured by a rheometer to have a yield value of 10.8 Pa.

[0029] figure 2 It is the rheological spectrum of the yield value of the spray flow gel sodium alginate prepared in the present embodiment, as can be s...

technical field

[0001] The invention relates to the technical field of hydrogel preparation, in particular to a spray flow gel and a preparation method thereof. Background technique

[0002] A mobile gel is a suspension of gelled particles dispersed in a continuous medium or a loosely linked form of particles. The reason for its formation is that biological macromolecules cannot form an ordered network structure under the action of external force during the sol-gel transition process. This gel form has been extensively studied over the past few decades. Foods for various purposes can be designed and constructed by adjusting the microstructure of materials. This technology is expected to be widely used as a new type of food carrier such as 3D printed food and formula food for special medical purposes. At present, the commonly used flow gel preparation method is through the action of the shear field. For example, the cryogel is subjected to rotational shear during the coolin...

Examples

Embodiment 1

[0025] Add 1g of agar powder to 100ml of deionized water, stir in a water bath at 95°C for 2 hours, add it to the spray pot after fully swelling, start the air compressor, and spray through the spray head after the pressure reaches 0.2Mpa. 0.5mm. Start the fan to be refrigerated, and the generated cold air below 4°C will contact the spray, and the droplets will gel and fall into the collector to form a spray flow gel. The yield value measured by a rheometer is 11.2 Pa.

[0026] figure 1 The rheological spectrum of the spray flow 0.5% agar yield value prepared for this embodiment, as can be seen from the figure: the agar forms a semi-solid gel different from the static gel, and this gel has both solid gel The smoothness and flowability of liquid, and the high yield value endow it with good chewiness.

Embodiment 2

[0028] Add 1 g of sodium alginate powder to 100 ml of water, and bathe in water at 70 ° C for 2 hours; add 0.5 g of calcium chloride powder to 100 g of water, fully dissolve and set aside. The sodium alginate solution and the calcium chloride solution are sprayed through different spray heads, the spray heads are oppositely sprayed, the compressed air is 0.2Mpa, the spray hole diameter of the spray head is 0.5mm, and the distance between the spray heads is 1m, the two kinds of mist droplets collide with each other to form a gel, and In the process of falling, it is subjected to the shearing action of the air, resulting in the inability to form high-strength gel particles and forming flow gel particles with less hardness and irregular shape. The collected samples were measured by a rheometer to have a yield value of 10.8 Pa.

[0029] figure 2 It is the rheological spectrum of the yield value of the spray flow gel sodium alginate prepared in the present embodiment, as can be s...

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