PREPARATION METHOD FOR WATER-RETAINING NANOAGENT AND APPLICATIONS THEREOF IN QUICK-FROZEN CRUSTACEAN SHRIMP PRODUCT

Abstract

A preparation method for a water-retaining nanoagent and applications thereof in a quick-frozen crustacean shrimp product, related to the technical field of food processing. The formula of the present invention comprises inulin, xylitol, carboxymethyl chitosan, pullulan, sodium tripolyphosphate, sodium chloride, and sodium alginate. The powder raw materials are mixed evenly with water and then go through a homogenizer, a colloid mill, and an ultrasound treatment to produce the water-retaining nanoagent. The method of the present invention also relates to applications of the freeze-proof water-retaining agent in freezing a crustacean aquatic product.

Claims

1. A method for preparing a water-retaining nanoagent, wherein raw materials are formulated in the following parts by weight: 10-15 parts of inulin, 12-20 parts of xylitol, 5-10 parts of carboxymethyl chitosan, 5-10 parts of pullulan, 3-7 parts of sodium tripolyphosphate, 1-3 parts of sodium chloride, 1-3 parts of sodium alginate and 900-1,000 parts of water; and the specific process comprises: sufficiently and evenly mixing the raw materials, homogenizing with a homogenizer for 15-25 min, treating with a colloid mill for 4-6 min, then treating with an ultrasonic cell crusher at 400-600 W for 25-35 min, and centrifuging to obtain the water-retaining nanoagent.

2. The method for preparing the water-retaining nanoagent according to claim 1, wherein the raw materials are formulated in the following parts by weight: 13 parts of inulin, 16 parts of xylitol, 6 parts of carboxymethyl chitosan, 5 parts of pullulan, 5 parts of sodium tripolyphosphate, 2 parts of sodium chloride, 1 part of sodium alginate and 952 parts of water.

3. The method for preparing the water-retaining nanoagent according to claim 1, wherein the specific process comprises: sufficiently and evenly mixing the raw materials, homogenizing with a homogenizer for 20 min, treating with a colloid mill for 5 min, then treating with an ultrasonic cell crusher at 500 W for 30 min, and centrifuging to obtain the water-retaining nanoagent.

4. The method for preparing the water-retaining nanoagent according to claim 1, wherein a particle size of the water-retaining nanoagent is 50-300 nm.

5. The method for preparing the water-retaining nanoagent according to claim 3, wherein a particle size of the water-retaining nanoagent is 50-300 nm.

6. An application of the water-retaining nanoagent prepared by the method of claim 1 in a quick-frozen crustacean shrimp product, comprising the following steps: step (1) quickly killing fresh crustacean shrimps, washing and draining for later use; step (2) punching the treated crustacean shrimps, and soaking in the prepared water-retaining nanoagent at 2-6° C. for 2-4 h; step (3) taking the soaked product out of the water-retaining agent, and wiping dry with gauze; and step (4) subpackaging the prepared product in the step (3), and keeping in frozen storage at −16° C. to −20° C.

7. The application according to claim 6, wherein the volume ratio of the crustacean shrimps to the water-retaining nanoagent in the step (2) is (2-3): (8-9).

8. The application according to claim 6, wherein in the step (4), the crustacean shrimps are quickly frozen to make the central temperature of the product reach −10° C. within half an hour, and then are kept in frozen storage at −18° C.

9. The application according to claim 6, wherein in the step (1), the body length of the selected crustacean shrimps is 10-15 cm; and the crustacean shrimps are crayfishes, sea shrimps, river shrimps and the like.

10. The application according to claim 8, wherein in the step (1), the body length of the selected crustacean shrimps is 10-15 cm; and the crustacean shrimps are crayfishes, sea shrimps, river shrimps and the like.

11. The method for preparing the water-retaining nanoagent according to claim 2, wherein the specific process comprises: sufficiently and evenly mixing the raw materials, homogenizing with a homogenizer for 20 min, treating with a colloid mill for 5 min, then treating with an ultrasonic cell crusher at 500 W for 30 min, and centrifuging to obtain the water-retaining nanoagent.

12. The method for preparing the water-retaining nanoagent according to claim 2, wherein a particle size of the water-retaining nanoagent is 50-300 nm.

13. An application of the water-retaining nanoagent prepared by the method of claim 2 in a quick-frozen crustacean shrimp product, comprising the following steps: step (1) quickly killing fresh crustacean shrimps, washing and draining for later use; step (2) punching the treated crustacean shrimps, and soaking in the prepared water-retaining nanoagent at 2-6° C. for 2-4 h; step (3) taking the soaked product out of the water-retaining agent, and wiping dry with gauze; and step (4) subpackaging the prepared product in the step (3), and keeping in frozen storage at −16° C. to −20° C.

14. An application of the water-retaining nanoagent prepared by the method of claim 3 in a quick-frozen crustacean shrimp product, comprising the following steps: step (1) quickly killing fresh crustacean shrimps, washing and draining for later use; step (2) punching the treated crustacean shrimps, and soaking in the prepared water-retaining nanoagent at 2-6° C. for 2-4 h; step (3) taking the soaked product out of the water-retaining agent, and wiping dry with gauze; and step (4) subpackaging the prepared product in the step (3), and keeping in frozen storage at −16° C. to −20° C.

15. An application of the water-retaining nanoagent prepared by the method of claim 4 in a quick-frozen crustacean shrimp product, comprising the following steps: step (1) quickly killing fresh crustacean shrimps, washing and draining for later use; step (2) punching the treated crustacean shrimps, and soaking in the prepared water-retaining nanoagent at 2-6° C. for 2-4 h; step (3) taking the soaked product out of the water-retaining agent, and wiping dry with gauze; and step (4) subpackaging the prepared product in the step (3), and keeping in frozen storage at −16° C. to −20° C.

16. An application of the water-retaining nanoagent prepared by the method of claim 5 in a quick-frozen crustacean shrimp product, comprising the following steps: step (1) quickly killing fresh crustacean shrimps, washing and draining for later use; step (2) punching the treated crustacean shrimps, and soaking in the prepared water-retaining nanoagent at 2-6° C. for 2-4 h; step (3) taking the soaked product out of the water-retaining agent, and wiping dry with gauze; and step (4) subpackaging the prepared product in the step (3), and keeping in frozen storage at −16° C. to −20° C.

17. The application according to claim 7, wherein in the step (4), the crustacean shrimps are quickly frozen to make the central temperature of the product reach −10° C. within half an hour, and then are kept in frozen storage at −18° C.

18. The application according to claim 7, wherein in the step (1), the body length of the selected crustacean shrimps is 10-15 cm; and the crustacean shrimps are crayfishes, sea shrimps, river shrimps and the like.

Description

DESCRIPTION OF THE EMBODIMENTS

Example 1

[0032] Preparation of a water-retaining nanoagent and water-retaining application in a quick-frozen crayfish product. A carboxymethyl chitosan-xylitol water-retaining nanoagent consisted of the following raw materials in parts by weight: 10 parts of inulin, 16 parts of xylitol, 6 parts of carboxymethyl chitosan, 5 parts of pullulan, 5 parts of sodium tripolyphosphate, 2 parts of sodium chloride, 2 part of sodium alginate and 954 parts of water. The steps were as follows.

[0033] (1) Mixing of raw materials: the raw materials were weighed in the above proportions and then mixed evenly for later use.

[0034] (2) Ultrasound treatment: the raw materials mixed evenly in step (1) were added with an amount of water and stirred; then the raw materials were sufficiently and evenly mixed, homogenized with a homogenizer for 20 min and treated with a colloid mill for 5 min; a container was placed in an ultrasonic cell crusher; a probe with a 2 cm diameter was extended into the raw materials; and a sample was kept at room temperature in a low-temperature water bath, sealed and treated with 500 W ultrasound for 30 min in an ultrasound cycle with an operation time of 4 s and an interval time of 2 s.

[0035] (3) Application of the water-retaining agent: the water-retaining nanoagent after the ultrasound treatment in step (2) was applied in a frozen aquatic product.

[0036] A. Fresh crayfishes (with a body length of 10-15 cm) were quickly killed, washed and drained for later use.

[0037] B. The treated crayfishes were soaked in the prepared water-retaining nanoagent (the volume ratio of the crayfishes to the water-retaining nanoagent was 2:8) at 4° C. for 2 h.

[0038] C. The soaked product was taken out of the water-retaining agent, and wiped dry with gauze.

[0039] D. The above-mentioned aquatic product was subpackaged, and kept in frozen storage at −18° C.

[0040] Compared with a common water-retaining agent, the water-retaining nanoagent prepared by this method achieves good water retention of the peeled crayfishes in a frozen storage process, and keeps the water loss rate below 10% after 6 months of the frozen storage.

Example 2

[0041] Preparation of a water-retaining nanoagent and water-retaining application in a quick-frozen sea shrimp product. A sodium alginate-xylitol water-retaining nanoagent consisted of the following raw materials in parts by weight: 12 parts of inulin, 20 parts of xylitol, 5 parts of carboxymethyl chitosan, 5 parts of pullulan, 6 parts of sodium tripolyphosphate, 2 parts of sodium chloride, 2 part of sodium alginate and 948 parts of water. The steps were as follows.

[0042] (1) Mixing of raw materials: the raw materials were weighed in the above proportions and then mixed evenly for later use.

[0043] (2) Ultrasound treatment: the raw materials mixed evenly in step (1) were added with an amount of water and stirred; then the raw materials were sufficiently and evenly mixed, homogenized with a homogenizer for 20 min and treated with a colloid mill for 5 min; a container was placed in an ultrasonic cell crusher; a probe with a 2 cm diameter was extended into the raw materials; and a sample was kept at room temperature in a low-temperature water bath, sealed and treated with 500 W ultrasound for 30 min in an ultrasound cycle with an operation time of 4 s and an interval time of 2 s.

[0044] (3) Application of the water-retaining agent: the water-retaining nanoagent after the ultrasound treatment in step (2) was applied in a frozen aquatic product.

[0045] A. Fresh sea shrimps were quickly killed, washed and drained for later use.

[0046] B. The treated sea shrimps were soaked in the prepared water-retaining nanoagent (the volume ratio of the sea shrimps to the water-retaining nanoagent was 2:8) at 4° C. for 2 h.

[0047] C. The soaked product was taken out of the water-retaining agent, and wiped dry with gauze.

[0048] D. The above-mentioned aquatic product was subpackaged, and kept in frozen storage at −18° C.

[0049] Compared with a common water-retaining agent, the water-retaining nanoagent prepared by this method achieves good water retention of the peeled sea shrimps in a frozen storage process, and keeps the water loss rate below 10% after 6 months of the frozen storage.

Example 3

[0050] Preparation of a water-retaining nanoagent and water-retaining application in a quick-frozen river shrimp product. A carboxymethyl chitosan-xylitol water-retaining nanoagent consisted of the following raw materials in parts by weight: 13 parts of inulin, 16 parts of xylitol, 6 parts of carboxymethyl chitosan, 5 parts of pullulan, 5 parts of sodium tripolyphosphate, 2 parts of sodium chloride, 2 part of sodium alginate and 951 parts of water. The steps were as follows.

[0051] (1) Mixing of raw materials: the raw materials were weighed in the above-mentioned proportions and then mixed evenly for later use.

[0052] (2) Ultrasound treatment: the raw materials mixed evenly in step (1) were added with an amount of water and stirred; then the raw materials were sufficiently and evenly mixed, homogenized with a homogenizer for 20 min and treated with a colloid mill for 5 min; a container was placed in an ultrasonic cell crusher; a probe with a 2 cm diameter was extended into the raw materials; and a sample was kept at room temperature in a low-temperature water bath, sealed and treated with 500 W ultrasound for 30 min in an ultrasound cycle with an operation time of 4 s and an interval time of 2 s.

[0053] (3) Application of the water-retaining agent: the water-retaining nanoagent after the ultrasound treatment in step (2) was applied in a frozen aquatic product.

[0054] A. Fresh river shrimps (with a body length of 10-15 cm) were quickly killed, washed and drained for later use.

[0055] B. The treated river shrimps were soaked in the prepared water-retaining nanoagent (the volume ratio of the river shrimps to the water-retaining nanoagent was 2:8) at 4° C. for 2 h.

[0056] C. The soaked product was taken out of the water-retaining agent, and wiped dry with gauze.

[0057] D. The above-mentioned aquatic product was subpackaged, and kept in frozen storage at −18° C.

[0058] Compared with a common water-retaining agent, the water-retaining nanoagent prepared by this method achieves good water retention of the peeled river shrimps in a frozen storage process, and keeps the water loss rate below 10% after 6 months of the frozen storage.