Nutritional cream for pets and preparation method thereof

Abstract

The invention discloses nutritional paste for pets and a preparation method of the nutritional paste, and belongs to the technical field of pet foods.The nutritional paste for pets comprises, by weight, 60%-70% of meat products, 0.5%-0.6% of vitamin components, 2.8%-3% of mineral elements, 6%-7% of vegetable oil, 1%-3% of fish oil, 3%-5% of an emulsifier, 0.8%-1% of a gel matrix, 0.02%-0.03% of an antioxidant and the balance water, the antioxidant is a gallic acid lecithin compound, and the content of the vitamin components is 0.5%-0.6%. The emulsifier is octenyl succinic anhydride cyclodextrin ester; the gel matrix comprises xanthan gum, konjac glucomannan and trehalose, and the addition amount of the trehalose is 5%-10% of the total mass of the xanthan gum and the konjac glucomannan. The trehalose and the octenyl succinic anhydride cyclodextrin ester are introduced, so that the bleeding condition is improved, and the storage stability of the nutritional paste is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pet food, and particularly relates to a pet nutritional paste and a preparation method thereof. BACKGROUND

[0002] Currently, the types of pets are mainly dogs and cats. The pet nutritional paste is a high-concentration and compound nutritional supplement specially designed for pets such as dogs and cats, and is usually in the form of ointment or gel, which is convenient for licking, digestion and absorption. It is rich in essential nutrients such as protein, vitamins (such as A, B, D3 and E), minerals (such as calcium, iron and zinc), amino acids, lecithin and fish oil, and is used for rapid energy and nutrient supplementation, and is particularly suitable for the following situations: young, old or weak pets; postoperative recovery period; pregnancy or lactation period; poor appetite, malnutrition or low immunity; in addition, the pet nutritional paste also has multiple effects such as improving hair quality, promoting digestion, enhancing immunity and regulating mood, and can be used as a daily nutritional supplement or as a training reward.

[0003] The pet nutritional paste products on the market have a high fat content. The high fat content has the following advantages: the fat has the highest energy density, can provide sufficient heat in a small volume; the oil and emulsifier form a natural ointment base at room temperature, which is easy to squeeze and melt, and can replace carbohydrates to save costs; fat-soluble vitamins are directly dissolved in oil, which saves the coating process and improves absorption; a small amount of animal oil can be compounded to enhance the flavor and improve the licking rate; the unit price of vegetable oil is low, and manufacturers will appropriately increase the oil content to reduce costs and increase efficiency.

[0004] However, high oil content also brings a series of problems. For example, the product is prone to oil layering and precipitation during storage, which not only affects the appearance, but also may cause loss of some nutrients and reduce the storage stability of the product; if the oil content in the nutritional paste is simply reduced, the product may have poor taste, poor palatability and other problems, which are not suitable for pets. SUMMARY

[0005] The present application provides a pet nutritional paste and a preparation method thereof, which solves the problem of poor storage stability of the pet nutritional paste.

[0006] The purpose of the present application can be achieved by the following technical solutions: The first aspect of the application provides a nutritional paste for pets, comprising, by weight, 60-70% of meat products, 0.5-0.6% of vitamin components, 2.8-3% of mineral elements, 6-7% of vegetable oil, 1-3% of fish oil, 3-5% of emulsifiers, 0.8-1% of gel matrix, 0.02-0.03% of antioxidants, and the balance being water, wherein the antioxidants are lecithin-gallic acid complexes, and the emulsifiers are octenyl succinic anhydride cyclodextrin esters; the gel matrix comprises xanthan gum, konjac gum, and trehalose, and the addition amount of trehalose is 5-10% of the total mass of xanthan gum and konjac gum.

[0007] In some possible implementations, the lecithin-gallic acid complex is prepared by the following steps: Gallic acid and lecithin are added to an aqueous ethanol solution, stirred at 50-60°C for 1-2h, and then the aqueous ethanol solution is removed by rotary evaporation to obtain the lecithin-gallic acid complex.

[0008] The molar ratio of gallic acid to lecithin is 1-2:1, and the volume ratio of ethanol to water in the aqueous ethanol solution is 1:1. The aqueous ethanol solution has lower viscosity than pure ethanol environment, which improves the molecular diffusion coefficient and the rate of inclusion reaction. Gallic acid has strong hydrophilicity and is difficult to play its antioxidant role in the nutritional paste with high fat content. By forming a complex with lecithin, the liposolubility of gallic acid is improved, thereby expanding the application range of gallic acid.

[0009] In some possible implementations, the mineral elements include calcium, magnesium, zinc, iron, manganese, copper, and selenium, which are provided by calcium hydrogen phosphate, magnesium sulfate, zinc sulfate, ferrous sulfate, manganese sulfate, copper sulfate, and yeast selenium, respectively.

[0010] In some possible implementations, the vitamin components include vitamin A, vitamin E, vitamin B12, niacin, pantothenic acid, and folic acid. Vitamins provide substances necessary for maintaining physiological functions on a daily basis for pets, and maintain the normal activity and nutrition level of animals, which can be adjusted according to the formula.

[0011] In some possible implementations, the mass ratio of the xanthan gum to the konjac gum is 4-7:3-6, and the addition amount of trehalose is 5-10% of the total mass of the xanthan gum and the konjac gum. The hydroxyl groups of trehalose form a hydrogen bond network with the polar groups of the xanthan gum and the konjac gum, "replace" water molecules, maintain the number and conformation of hydrogen bonds, and prevent chain segment rupture.

[0012] In some possible implementations, the meat products are prepared by the following steps: The dried and dehydrated meat has a water content of ≤10%, and is crushed to pass through a 60-80 mesh sieve.

[0013] In some specific implementations, the meat includes at least one of chicken, fish, beef and pigeon meat, which can be deboned or not, and the bone content is not more than 20%; The drying and dehydrating method is sun drying or low-temperature drying at 40 DEG C.

[0014] In some possible implementations, the vegetable oil is preferably at least one of soybean oil, rapeseed oil, peanut oil and olive oil.

[0015] In some possible implementations, the octenyl succinic anhydride cyclodextrin ester is prepared by the following steps: The beta-cyclodextrin is added to water, stirred and dispersed, and then a mixed solution of octenyl succinic anhydride and ethanol is added, after which the pH value of the system is adjusted to 8-9, and stirring is continued for 30-40 min, the pH value of the system is adjusted to 6.5-7, and then the product is obtained by freeze-drying, ethanol washing and vacuum drying at 40-50 DEG C. The octenyl succinic anhydride is mainly used for food processing and belongs to emulsifiers and thickeners, which can improve the texture and taste of food. The cyclodextrin molecule has a slightly conical hollow cylindrical three-dimensional ring structure, in which the outer upper end (the larger opening end) is composed of the secondary hydroxyl groups of C2 and C3, and the lower end (the smaller opening end) is composed of the primary hydroxyl group of C6, which has hydrophilicity, while the cavity is a hydrophobic region due to the shielding effect of the C-H bond. The octenyl succinic anhydride cyclodextrin ester prepared by using octenyl succinic anhydride and cyclodextrin as raw materials has good emulsifying effect as an emulsifier.

[0016] In some possible implementations, the mass ratio of beta-cyclodextrin to octenyl succinic anhydride is 100:2-5.

[0017] The second aspect of the present application provides a preparation method of a pet nutrition paste, which comprises the following steps: The meat product, vitamin component, mineral element, vegetable oil, fish oil, emulsifier, gel matrix and water are uniformly mixed, and then sterilized at 120-121 DEG C for 15-30 min to obtain a pet nutrition paste.

[0018] The beneficial effects of the present application are: The present application provides a kind of pet nutrition cream and its preparation method, which includes meat product, vitamin component, mineral element, vegetable oil, fish oil, emulsifier and gel matrix, wherein the antioxidant is lecithin-gallic acid complex, the emulsifier is octenyl succinic anhydride cyclodextrin ester; Gel matrix includes xanthan gum, konjac gum and trehalose.In the present application, lecithin-gallic acid complex is selected as antioxidant, which has amphiphilic property, and has good application effect in the water-oil mixed environment of pet nutrition cream with high fat and high protein.In the present application, trehalose is added in gel matrix, and the hydroxyl group of trehalose forms hydrogen bond network with the polar groups of xanthan gum and konjac gum, which improves the stability of nutrition cream, and further improves the stability of nutrition cream.

[0019] In the present application, octenyl succinic anhydride cyclodextrin ester is used in the mixing system of pet nutrition cream, and the stability of antioxidant effect is improved by the cooperation of octenyl succinic anhydride cyclodextrin ester and antioxidant, and the cyclodextrin in octenyl succinic anhydride cyclodextrin ester is a cyclic oligosaccharide with internal hydrophobic and external hydrophilic property, which can form water-soluble inclusion compound with fat-soluble ingredients.Cyclodextrin can form hydrogen bond with polysaccharide molecules and penetrate into the network structure of gel matrix, which hinders the migration of polysaccharide gel matrix and weakens the interaction between polysaccharide and water, thereby reducing water separation;On the other hand, it is beneficial to the uniform distribution of polysaccharide gel matrix and improves the stability of gel. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application, obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0021] The following is a detailed description of one embodiment of the present application.

[0022] The following will be specifically described in conjunction with the embodiments.

[0023] Example 1

[0024] The embodiment provides a kind of pet nutrition cream, according to weight parts, including meat product 60%, vitamin component 0.5%, mineral element 2.8%, soybean oil 6%, fish oil 1%, emulsifier 3%, gel matrix 0.8%, antioxidant 0.02%, and the rest is water, the antioxidant is gallic acid lecithin complex, and the emulsifier is octenyl succinic anhydride cyclodextrin ester.Gel matrix includes xanthan gum, konjak gum and trehalose, and the mass ratio of xanthan gum and konjak gum is 4:6, and the addition amount of trehalose is 5% of the total mass of xanthan gum and konjak gum.The preparation method of the pet nutrition cream includes the following steps: After the raw materials are uniformly mixed according to the formula, sterilization is carried out at 121 DEG C for 30 min to obtain a pet nutrition cream.

[0025] Gallic acid lecithin complex is prepared by the following steps: Gallic acid and lecithin are added to an aqueous ethanol solution, stirred at 60 DEG C for 2 h, and then the aqueous ethanol solution is removed by rotary evaporation to obtain gallic acid lecithin complex.The molar ratio of gallic acid to lecithin is 1:1, and the volume ratio of ethanol to water in the aqueous ethanol solution is 1:1.

[0026] The mineral element includes calcium 37%, magnesium 23%, zinc 13%, iron 13%, manganese 6%, copper 6% and selenium 2% by mass percentage.The vitamin component includes vitamin A 16%, vitamin E 65%, vitamin B12 1%, nicotinic acid 16%, pantothenic acid 1% and folic acid 1% by mass percentage.

[0027] Meat product is prepared by the following steps: Chicken meat (bone content not more than 20%) is dried and dehydrated to have a water content of less than or equal to 10%, and then crushed to pass through an 80-mesh sieve.The drying and dehydration method is low-temperature drying at 40 DEG C.

[0028] Octenyl succinic anhydride cyclodextrin ester is prepared by the following steps: Beta-cyclodextrin is added to water, stirred and dispersed, and then a mixture of octenyl succinic anhydride and ethanol is added.After addition is completed, the pH value of the system is adjusted to 8, and stirring is continued for 30 min.The pH value of the system is adjusted to 7, and then freeze-drying, ethanol washing and vacuum drying at 40 DEG C are carried out to obtain octenyl succinic anhydride cyclodextrin ester.The mass ratio of beta-cyclodextrin to octenyl succinic anhydride is 100:2.

[0029] Example 2

[0030] The embodiment provides a kind of pet nutrition cream, the difference between this embodiment and embodiment 1 is that the raw material ratio is different, in this embodiment, 65% of meat product, 0.6% of vitamin component, 3% of mineral element, 7% of soybean oil, 2% of fish oil, 4% of emulsifier, 1% of gel matrix, 0.03% of antioxidant, the rest is water, the preparation method is same as embodiment 1.

[0031] Example 3

[0032] The embodiment provides a kind of pet nutrition cream, the difference between this embodiment and embodiment 1 is that the raw material ratio is different, in this embodiment, 70% of meat product, 0.6% of vitamin component, 3% of mineral element, 7% of soybean oil, 3% of fish oil, 5% of emulsifier, 1% of gel matrix, 0.03% of antioxidant, the rest is water, the preparation method is same as embodiment 1.

[0033] Example 4

[0034] The embodiment provides a kind of pet nutrition cream, the difference between this embodiment and embodiment 1 is that the gel matrix includes xanthan gum, konjac gum and trehalose, the mass ratio of xanthan gum and konjac gum is 7:3, and the addition amount of trehalose is 10% of the total mass of xanthan gum and konjac gum.The rest of the raw materials and preparation method is same as embodiment 1.

[0035] Example 5

[0036] The embodiment provides a kind of pet nutrition cream, the difference between this embodiment and embodiment 1 is that the proportion of gallic acid lecithin complex is different, and the gallic acid lecithin complex is prepared by the following steps: Gallic acid and lecithin are added to an ethanol aqueous solution, stirred at 60 DEG C for 2 h, and then the ethanol aqueous solution is removed by rotary evaporation to obtain the gallic acid lecithin complex.The molar ratio of gallic acid and lecithin is 2:1, and the volume ratio of ethanol and water in the ethanol aqueous solution is 1:1.The rest of the raw materials and preparation method is same as embodiment 1.

[0037] Example 6

[0038] The embodiment provides a kind of pet nutrition cream, the difference between this embodiment and embodiment 1 is that the preparation steps of octenyl succinic anhydride cyclodextrin ester are different, and the octenyl succinic anhydride cyclodextrin ester is prepared by the following steps: β-cyclodextrin is added to water, stirred and dispersed, then a mixture of octenyl succinic anhydride and ethanol is added, after addition, the pH value of the system is adjusted to 8, and stirring is continued for 30 min, the pH value of the system is adjusted to 7, and then freeze-drying, ethanol washing and vacuum drying at 40 DEG C are carried out to obtain the octenyl succinic anhydride cyclodextrin ester.The mass ratio of β-cyclodextrin and octenyl succinic anhydride is 100:5.

[0039] Comparative Example 1

[0040] The comparative example is compared with example 1, the gel matrix is replaced by xanthan gum and konjac gum in a mass ratio of 4:6, i.e. no trehalose is added, and the remaining raw materials and preparation process are the same as example 1.

[0041] Comparative example 2

[0042] The comparative example is compared with example 1, the emulsifier is replaced by monoglyceride, and the remaining raw materials and preparation process are the same as example 1.

[0043] Comparative example 3

[0044] The comparative example is compared with example 1, the antioxidant is replaced by vitamin E, and the remaining raw materials and preparation process are the same as example 1.

[0045] Performance tests are carried out on example 1, examples 4-6 and comparative examples 1-3, the prepared samples are frozen at-20℃ for 24h, thawed to 20℃ at room temperature, after 5 cycles, centrifuged at 4500r / min for 15min, and the water content of the precipitate is calculated. The results are shown in table 1: Table 1

[0046] According to table 1, it can be seen from the comparison of comparative example 1 and comparative examples 1 and 2 that the introduction of trehalose and octenyl succinic anhydride cyclodextrin ester improves the water separation and improves the storage stability of the nutritional paste.

[0047] The peroxide value of example 1, comparative examples 1-3 is determined, and the peroxide value exposed to air for 0h, 10h and 24h is recorded, and the results are shown in table 2: Table 2

[0048] As can be seen from Table 2, relative to Comparative Example 2, the cyclodextrin introduced by the octenyl succinic anhydride cyclodextrin ester in the examples of the present application is beneficial to improve the thermal stability of the gallic acid lecithin complex. Although the gallic acid lecithin complex can improve its antioxidant effect in oil, due to the high-temperature sterilization treatment in the processing process of the pet nutrition cream, its stability after heating is affected. Due to the large amount of oil, protein and other nutrients in the pet nutrition cream, with air exposure, it will cause oxidation and a large amount of bacteria to breed, and the stability of the antioxidant after high-temperature heating plays an important role in the use of the pet nutrition cream. Although the vitamin component in the pet nutrition cream contains vitamin E which has antioxidant effect, the pet nutrition cream in the present application contains a large amount of complex nutrients, and the gallic acid lecithin complex in the present application has amphiphilic property. According to the comparison between Example 1 and Comparative Example 3, it can be known that the gallic acid lecithin complex in the present application can fully exert its antioxidant effect. However, the thermal stability of the gallic acid lecithin complex is relatively poor, and the cyclodextrin introduced by the octenyl succinic anhydride cyclodextrin ester can improve the thermal stability of the gallic acid lecithin complex, thereby fully exerting its antioxidant effect.

[0049] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or equipment.

[0050] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pet nutritional paste, characterized in that, By weight, it comprises 60%–70% meat products, 0.5%–0.6% vitamin components, 2.8%–3% mineral elements, 6%–7% vegetable oil, 1%–3% fish oil, 3%–5% emulsifier, 0.8%–1% gel matrix, 0.02%–0.03% antioxidant, and the balance being water. The antioxidant is gallic acid lecithin complex, and the emulsifier is octenyl succinic anhydride cyclodextrin ester. The gel matrix includes xanthan gum, konjac gum, and trehalose, with the amount of trehalose added being 5%–10% of the total mass of xanthan gum and konjac gum.

2. The pet nutritional paste according to claim 1, characterized in that, The gallic acid-lecithin complex was prepared by the following steps: Gallic acid and lecithin were added to an ethanol-water solution and stirred at 50-60°C for 1-2 hours. After stirring, the ethanol-water solution was removed by rotary evaporation to obtain the gallic acid-lecithin complex.

3. The pet nutritional paste according to claim 2, characterized in that, The molar ratio of gallic acid to lecithin is 1-2:1, and the volume ratio of ethanol to water in the ethanol-water solution is 1:

1.

4. The pet nutritional paste according to claim 1, characterized in that, The mineral elements include calcium, magnesium, zinc, iron, manganese, copper, and selenium; the vitamin components include vitamin A, vitamin E, vitamin B12, niacin, pantothenic acid, and folic acid.

5. A pet nutritional paste according to claim 1, characterized in that, The mass ratio of xanthan gum to konjac gum is 4-7:3-6.

6. The pet nutritional paste according to claim 1, characterized in that, The meat products are prepared by the following steps: the meat is dried and dehydrated until the moisture content is ≤10%, and then crushed and passed through a 60-80 mesh sieve.

7. A pet nutritional paste according to claim 1, characterized in that, The vegetable oil is at least one of soybean oil, rapeseed oil, peanut oil, and olive oil.

8. A pet nutritional paste according to claim 1, characterized in that, The octenyl succinic anhydride cyclodextrin ester is prepared by the following steps: Add β-cyclodextrin to water, stir to disperse, then add a mixture of octenyl succinic anhydride and ethanol. After the addition is complete, adjust the pH of the system to 8-9, continue stirring for 30-40 minutes, and adjust the pH of the system to 6.5-7. After freeze drying, wash with ethanol, and vacuum dry at 40-50℃, octenyl succinic anhydride cyclodextrin ester is obtained.

9. A pet nutritional paste according to claim 8, characterized in that, The mass ratio of β-cyclodextrin to octenyl succinic anhydride is 100:2-5.

10. A method for preparing a pet nutritional paste, used to prepare the pet nutritional paste according to any one of claims 1-9, characterized in that, Includes the following steps: After mixing meat products, vitamin components, mineral elements, vegetable oil, fish oil, emulsifier, gel matrix and water evenly, sterilize at 120-121℃ for 15-30 minutes to obtain a pet nutritional paste.

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