Plant-based titanium dioxide liquid substitute and application thereof in compound seasoning

Abstract

The invention relates to a plant-based titanium dioxide liquid substitute and application of the plant-based titanium dioxide liquid substitute in a compound seasoning, and belongs to the technical field of compound seasonings. Aiming at the problems of food safety dispute of existing titanium dioxide and insufficient optical performance and poor stability of plant-based substitutes, the plant-based whitening stabilizer with a natural source is prepared by taking a banana extract as a matrix and compounding with nano cellulose, whey protein microspheres, locust bean gum and a color fixative. The product is natural in component source, excellent in optical performance and high in suspension stability, and can effectively replace titanium dioxide in the compound seasoning for whitening.

Description

Technical Field

[0001] The present invention belongs to the technical field of seasonings, and relates to a plant-based titanium white liquid substitute and its application in compound seasonings. Background Art

[0002] Compound seasonings play an important role in the modern food industry. Their main functions are to improve and enhance the flavor, color, and texture of foods. Whitening is a key indicator. Especially in certain specific products, such as white or light-colored foods like salad dressings, yogurts, mayonnaises, etc., whitening can enhance the visual appeal of the products, making them appear fresher, purer, and of higher quality. Traditionally, titanium dioxide has been widely used in the food industry as a whitening agent. Its superior light scattering ability makes it an ideal choice, capable of effectively improving the appearance of foods. However, with the increasing concerns of consumers about food safety and natural ingredients, seeking safe and natural whitening substitutes has become a major trend in the industry.

[0003] Existing whitening technologies mainly rely on chemically synthesized whitening agents, among which titanium dioxide is the most commonly used compound. Titanium dioxide has excellent stability and whitening effects, so it is widely used in foods, cosmetics, and other industrial products. In addition, some natural-source whitening agents, such as calcium carbonate and certain plant extracts, have also been developed and used successively. However, these natural whitening agents usually have inferior whitening effects compared to titanium dioxide and may have poor stability in different food matrices, restricting their wide application.

[0004] Although existing whitening technologies meet the market demand to a certain extent, titanium dioxide has been pointed out to potentially have health risks. Many countries and regions have imposed strict restrictions on its use in foods. Secondly, chemically synthesized whitening agents are difficult to meet the growing demand of consumers for natural and organic products. In addition, although natural whitening agents are relatively safe, they often have inferior whitening effects and stability compared to titanium dioxide, and are also costly, making it difficult to replace on a large scale. Therefore, it is necessary to develop a safe, effective, and natural whitening agent for addition to seasonings. Summary of the Invention

[0005] The purpose of the present invention is to provide a plant-based titanium white liquid substitute and its application in compound seasonings, so as to achieve the whitening effect of replacing titanium dioxide in compound seasonings.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A plant-based titanium white liquid substitute, comprising the following components in parts by weight: 30 - 50 parts of banana extract, 5 - 15 parts of nanocellulose, 15 - 30 parts of whey protein microspheres, 0.5 - 2 parts of color fixative, 5 - 10 parts of sucrose, 1 - 3 parts of locust bean gum; The nanocellulose is prepared from banana extract residue; The whey protein microspheres serve as light scattering enhancement components, and the particle size of the whey protein microspheres is 0.1-5 μm.

[0007] In this application, banana extract is used as the core whitening matrix, which is rich in pectin, polysaccharides and natural pigments, providing basic whiteness and viscosity; it is made by acid hydrolysis and homogenization of banana residue to form a nano-scale fiber network, which enhances light scattering and system stability; spherical scatterers with a particle size of 0.1-5μm efficiently reflect visible light through the Mie scattering principle, matching the scattering wavelength of TiO2; a compound antioxidant system: sodium D-isoascorbate, L-ascorbic acid and citric acid, inhibits enzymatic browning and non-enzymatic oxidation.

[0008] As a preferred technical solution of the present invention, the preparation of the banana extract comprises the following steps: A1. Select bananas that are 6-8% ripe, peel them, and then add 1.5-2.5 times the weight of the bananas in deionized water to make pulp. A2, adding 0.02-0.08wt% pectinase and 0.03-0.07wt% cellulase to the banana pulp prepared in step A1 for enzymatic hydrolysis; A3. Add 0.002-0.01% tannase to the enzymatic hydrolyzate from step A2 to hydrolyze the ester bonds of tannins to generate gallic acid and glucose, thereby eliminating the astringency of polyphenols. A4. Heat the enzymatic hydrolyzate from step A3 to 85-90°C and maintain for 10-15 minutes to inactivate the enzyme. Filter the filtrate and concentrate to dryness.

[0009] As a preferred technical solution of the present invention, the enzymatic hydrolysis pH in step A2 is 4.2-4.6, the temperature is 22-28° C., and the enzymatic hydrolysis time is 40-80 min.

[0010] As a preferred technical solution of the present invention, the enzymatic deastringency in step A3 has a pH of 5.0-6.0, a temperature of 40-50° C., and a time of 1-3 h.

[0011] As a preferred technical solution of the present invention, the method for preparing nanocellulose comprises the following steps: B1. Filtering the prepared banana extract to obtain a filter residue, drying it, and crushing it; B2. Immerse the crushed filter residue in 0.5-1% H2SO4 solution for acid hydrolysis and then neutralize with NaOH to pH 6.8-7.4; B3. The mixed solution obtained in step B2 was subjected to 180-220 MPa high pressure homogenization cycle for 3 times, and then separated and dried.

[0012] As a preferred technical solution of the present invention, the nanocellulose particle size is 200-500nm.

[0013] As a preferred technical solution of the present invention, the preparation method of the whey protein microspheres is as follows: C1. Heat-treat an 8-10% whey protein isolate solution at 80-85 °C for 20-40 min; C2. Use the protein solution heat-treated in step C1 as the aqueous phase, and 0.2-0.8% Span 80 corn oil as the oil phase, and emulsify at a flow rate ratio of water:oil = 1:4-6 to obtain a W / O emulsion; C3. Add 10-15 U / g protein of transglutaminase to the emulsion prepared in step C2, and carry out a cross-linking reaction at 45-55 °C for 40-80 min; C4. After demulsifying, separating and washing the cross-linked emulsion in step C3, add 20-30 wt% maltodextrin. The maltodextrin encapsulation reduces the surface energy and prevents the microspheres from agglomerating, and then spray-dry to obtain microsphere powder.

[0014] As a preferred technical solution of the present invention, the color protectant includes: sodium D-isoascorbate, L-ascorbic acid and citric acid; the mass ratio of sodium D-isoascorbate, L-ascorbic acid and citric acid is 1-5:0.5-2:3-10.

[0015] As a preferred technical solution of the present invention, the preparation steps of the plant-based titanium white liquid substitute are as follows: (1) Mix the banana extract, sucrose and locust bean gum evenly; (2) Sequentially add nanocellulose and whey protein microspheres to the mixture prepared in step (1) and mix evenly; (3) Add the color protectant to the mixture prepared in step (2) and mix evenly, and then vacuum package to obtain the plant-based titanium white liquid substitute.

[0016] As a preferred technical solution of the present invention, the plant-based titanium white liquid substitute replaces or partially replaces titanium dioxide in the compound seasoning formula for whitening.

[0017] The beneficial effects of the present invention: (1)The present invention uses banana extract as the basic raw material, utilizes the colloid and milky juice of the banana itself, and on this basis, prepares whey protein microspheres as the light scattering enhancement component. Its particle size is 0.1 - 5 μm, which is the preferred size range for enhancing light scattering, enabling it to effectively simulate the optical behavior of titanium dioxide. By scattering incident light, it significantly improves the gloss and whiteness of food; further, nano-cellulose prepared from the banana extract residue enhances the overall optical performance, providing uniform light scattering in food, thereby achieving an ideal whitening effect. In addition, the fiber network structure of nano-cellulose helps to stabilize the distribution of whey protein microspheres, preventing their sedimentation or aggregation, and thus maintaining a long-term whitening effect.

[0018] (2)The present invention constructs a natural composite system using banana extract, residue regenerated cellulose, and whey protein as a substitute for titanium white liquid, achieving a high degree of approximation in optical performance to traditional titanium dioxide. At the same time, it solves the problems of insufficient optical performance, poor stability, and food safety disputes of existing plant-based substitutes, providing a safe, efficient, and sustainable new solution for the whitening of compound seasonings.

[0019] (3)The nano-cellulose prepared from the banana extract residue of the present invention realizes the full utilization of resources and is more natural and safe than chemically modified nano-cellulose; the high pectin content in the banana extract residue forms a natural colloid network to enhance suspension stability; and part of the polyphenols are retained to inhibit browning. Specific Embodiments

[0020] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in combination with embodiments, details the specific embodiments, structures, features, and their effects according to the present invention.

[0021] Example 1 A plant-based substitute for titanium white liquid contains the following components in parts by weight: 40 parts of banana extract, 10 parts of nano-cellulose, 22 parts of whey protein microspheres, 1.2 parts of color protection agent, 8 parts of sucrose, 2 parts of locust bean gum; The nano-cellulose is prepared from the banana extract residue; The whey protein microspheres are used as the light scattering enhancement component, and the particle size is 0.1 - 5 μm.

[0022] The preparation of the banana extract includes the following steps: A1. Select bananas with a maturity of 7 points, peel them, and add 2 times the mass of deionized water of the bananas to make a pulp; A2. Add 0.05 wt% pectinase and 0.05 wt% cellulase to the banana pulp water prepared in step A1 for enzymatic hydrolysis; A3. Add 0.006% tannase to the enzymatic hydrolysate in step A2 for enzymatic deastringency; A4. Heat the enzymatic hydrolysate in step A3 to 88 °C, keep it for 12 min to inactivate the enzyme, then filter to obtain the filtrate and concentrate and dry it.

[0023] The pH of the enzymatic hydrolysis in step A2 is 4.4, the temperature is 25 °C, and the enzymatic hydrolysis time is 60 min.

[0024] The pH of the enzymatic deastringency in step A3 is 5.5, the temperature is 45 °C, and the time is 2 h.

[0025] The preparation method of the nanocellulose includes the following steps: B1. Filter the prepared banana extract to obtain the filter residue, dry and pulverize it; B2. Immerse the pulverized filter residue in 0.8% H2SO4 solution for acid hydrolysis, and then neutralize it with NaOH to pH 7.2; B3. Subject the mixture obtained in step B2 to high-pressure homogenization at 200 MPa for 3 cycles, and then separate and dry it.

[0026] The particle size of the nanocellulose is 200 - 500 nm.

[0027] The preparation method of the whey protein microspheres is as follows: C1. Heat the 9% whey protein isolate solution at 82 °C for 30 min; C2. Use the protein solution after heat treatment in step C1 as the aqueous phase, and 0.5% Span 80 corn oil as the oil phase, and emulsify at a flow rate ratio of water:oil = 1:5 to obtain a W / O emulsion; C3. Add transglutaminase at 12 U / g protein to the emulsion obtained in step C2, and carry out a cross-linking reaction at 50 °C for 60 min; C4. After demulsifying, separating and washing the cross-linked emulsion in step C3, add 25 wt% maltodextrin and spray-dry to obtain the microsphere powder.

[0028] The color fixative includes: sodium D-isoascorbate, L-ascorbic acid and citric acid; the mass ratio of sodium D-isoascorbate, L-ascorbic acid and citric acid is 3:1:7.

[0029] The preparation steps of the plant-based titanium white liquid substitute include: (1) Mix the banana extract, sucrose and locust bean gum evenly; (2) Add nanocellulose and whey protein microspheres to the mixture obtained in step (1) in sequence and mix evenly; (3) Add the color fixative to the mixture obtained in step (2) and mix evenly, and then carry out vacuum packaging to obtain the plant-based titanium white liquid substitute.

[0030] The described plant-based titanium white liquid substitute is used for whitening by replacing or partially replacing titanium dioxide in the compound seasoning formula.

[0031] Example 2 A plant-based titanium white liquid substitute contains the following components in parts by weight: 30 parts of banana extract, 5 parts of nanocellulose, 15 parts of whey protein microspheres, 0.5 part of color fixative, 5 parts of sucrose, and 1 part of locust bean gum; The nanocellulose is prepared from the filter residue of banana extract; The whey protein microspheres serve as a light scattering enhancing component with a particle size of 0.1 - 5 μm.

[0032] The preparation of the banana extract includes the following steps: A1. Select bananas with a maturity of 6 points, peel them, and add 1.5 times the mass of the bananas of deionized water to make a pulp; A2. Add 0.02 wt% pectinase and 0.03 wt% cellulase to the banana pulp water prepared in step A1 for enzymatic hydrolysis; A3. Add 0.002% tannase to the enzymatic hydrolysate in step A2 for enzymatic deastringency; A4. Heat the enzymatic hydrolysate in step A3 to 85°C, hold for 10 min to inactivate the enzyme, then filter to obtain the filtrate and concentrate and dry it.

[0033] In step A2, the pH of the enzymatic hydrolysis is 4.2, the temperature is 22°C, and the enzymatic hydrolysis time is 40 min.

[0034] In step A3, the pH of the enzymatic deastringency is 5.0, the temperature is 40°C, and the time is 1 h.

[0035] The preparation method of the nanocellulose includes the following steps: B1. Dry and crush the filter residue obtained by filtering the banana extract; B2. Immerse the crushed filter residue in a 0.5% H2SO4 solution for acid hydrolysis, and then neutralize it with NaOH to pH 6.8; B3. Subject the mixture obtained in step B2 to high-pressure homogenization at 180 MPa for 3 cycles, and then separate and dry it.

[0036] The particle size of the nanocellulose is 200 - 500 nm.

[0037] The preparation method of the whey protein microspheres is as follows: C1. Heat an 8 - 10% whey protein isolate solution at 80°C for 20 min; C2. Use the protein solution after heat treatment in step C1 as the aqueous phase, and 0.2% Span 80 corn oil as the oil phase, and emulsify at a flow rate ratio of water:oil = 1:4 to obtain a W / O emulsion; C3. Add transglutaminase at 10 U / g protein to the emulsion obtained in step C2, and conduct a cross-linking reaction at 45 °C for 40 min; C4. After demulsifying, separating, and washing the cross-linked emulsion in step C3, add 20 wt% maltodextrin and obtain microsphere powder by spray drying.

[0038] The color protectant includes: sodium D-isoascorbate, L-ascorbic acid, and citric acid; the mass ratio of sodium D-isoascorbate, L-ascorbic acid, and citric acid is 1:0.5:3.

[0039] The plant-based titanium white liquid substitute includes the following preparation steps: (1) Mix the banana extract, sucrose, and locust bean gum evenly; (2) Sequentially add nanocellulose and whey protein microspheres to the mixture obtained in step (1) and mix evenly; (3) Add the color protectant to the mixture obtained in step (2) and mix evenly, and then obtain the plant-based titanium white liquid substitute through vacuum packaging.

[0040] The plant-based titanium white liquid substitute replaces or partially replaces titanium dioxide in the compound seasoning formula for whitening.

[0041] Example 3 A plant-based titanium white liquid substitute includes the following components in parts by weight: 50 parts of banana extract, 15 parts of nanocellulose, 30 parts of whey protein microspheres, 2 parts of color protectant, 10 parts of sucrose, 3 parts of locust bean gum; The nanocellulose is prepared from the filter residue of the banana extract; The whey protein microspheres serve as a light scattering enhancement component, and the particle size is 0.1 - 5 μm.

[0042] The preparation of the banana extract includes the following steps: A1. Select bananas with 80% maturity, peel them, and make a pulp with 2.5 times the mass of deionized water of the bananas; A2. Add 0.08 wt% pectinase and 0.07 wt% cellulase to the banana pulp water obtained in step A1 for enzymatic hydrolysis; A3. Add 0.01% tannase to the enzymatic hydrolysate in step A2 for enzymatic deastringency; A4. Heat the enzymatic hydrolysate in step A3 to 90 °C, hold for 15 min to inactivate the enzymes, then filter to obtain the filtrate and conduct concentration and drying.

[0043] For the enzymatic hydrolysis in step A2, the pH is 4.6, the temperature is 28 °C, and the enzymatic hydrolysis time is 80 min.

[0044] For the enzymatic astringency removal in Step A3, the pH is 6.0, the temperature is 50 °C, and the time is 3 h.

[0045] The preparation method of the nanocellulose comprises the following steps: B1. Filter the banana extract to obtain the filter residue, which is dried and pulverized. B2. Immerse the pulverized filter residue in a 1% H2SO4 solution for acid hydrolysis, and then neutralize it with NaOH to pH 7.4. B3. Subject the mixture obtained in Step B2 to high-pressure homogenization at 220 MPa for 3 cycles and then separate and dry it.

[0046] The particle size of the nanocellulose is 200 - 500 nm.

[0047] The preparation method of the whey protein microspheres is as follows: C1. Heat-treat a 10% whey protein isolate solution at 85 °C for 40 min. C2. Use the protein solution after heat treatment in Step C1 as the aqueous phase, and 0.8% Span 80 corn oil as the oil phase. Emulsify at a flow rate ratio of water:oil = 1:6 to obtain a W / O emulsion. C3. Add transglutaminase at 15 U / g protein to the emulsion obtained in Step C2 and carry out a cross-linking reaction at 55 °C for 80 min. C4. After demulsifying, separating, and washing the cross-linked emulsion in Step C3, add 30 wt% maltodextrin and spray-dry to obtain microsphere powder.

[0048] The color fixative includes: sodium D-isoascorbate, L-ascorbic acid, and citric acid; the mass ratio of sodium D-isoascorbate, L-ascorbic acid, and citric acid is 5:2:10.

[0049] The preparation steps of the plant-based titanium white liquid substitute are as follows: (1) Mix the banana extract, sucrose, and locust bean gum evenly. (2) Sequentially add nanocellulose and whey protein microspheres to the mixture obtained in Step (1) and mix evenly. (3) Add the color fixative to the mixture obtained in Step (2) and mix evenly, and then vacuum package to obtain the plant-based titanium white liquid substitute.

[0050] The plant-based titanium white liquid substitute replaces or partially replaces titanium dioxide in the compound seasoning formula for whitening.

[0051] Comparative Example 1 Based on Example 1, replace the banana extract with tapioca starch, and keep the rest the same as in Example 1.

[0052] Comparative Example 2 On the basis of Example 1, CaCO3 was used to replace the banana extract, and the rest was kept the same as in Example 1.

[0053] Comparative Example 3 On the basis of Example 1, the step of preparing whey protein microspheres was omitted, and whey protein isolate was directly added, and the rest was kept the same as in Example 1.

[0054] Comparative Example 4 On the basis of Example 1, cellulose nanocrystals were used to replace nanocellulose, and the rest was kept the same as in Example 1.

[0055] Comparative Example 5 On the basis of Example 1, the color protectant was changed to sodium D-isoascorbate and L-ascorbic acid with a mass ratio of 3:8, and the rest was kept the same as in Example 1.

[0056] Comparative Example 6 On the basis of Example 1, the color protectant was changed to sodium D-isoascorbate and citric acid with a mass ratio of 4:7, and the rest was kept the same as in Example 1.

[0057] Comparative Example 7 On the basis of Example 1, the color protectant was changed to L-ascorbic acid and citric acid with a mass ratio of 1:10, and the rest was kept the same as in Example 1.

[0058] Control Example On the basis of Example 1, 0.5wt% TiO2 was used to replace the banana extract, and the rest was kept the same as in Example 1.

[0059] Performance Test: Whiteness value: The whiteness values of the examples and comparative examples were tested according to the GB / T 3979-2008 standard; Hiding power: The hiding power was tested with a Leneta Form 3B black and white contrast card (reflectance of the white area 80±2%, reflectance of the black area <5%). The samples of the examples and comparative examples were prepared into an aqueous dispersion with a solid content of 20%, and 0.20±0.01 g / dm² was weighed and evenly scraped onto the surface of the contrast card in one direction with a wire bar coater, and dried horizontally in a constant temperature and humidity box at 25°C and 50% RH for 24 hours. The Y values of the black and white areas of the coating film were measured with a spectrophotometer (D65 light source, 10° viewing angle), and the average value was taken after three parallel tests.

[0060] Stability: The sedimentation rates of the samples of the examples and comparative examples were tested according to the GB / T41316-2022 standard; 5 g of the samples of the examples and comparative examples were taken and put into transparent glass bottles, and after being placed in a constant temperature oven at 40°C for 7 days, the whiteness value was tested, and the change of ΔL* at 0 day and 7 days was recorded.

[0061] From the above results, it can be seen that the performance of adding titanium dioxide in the examples and the control examples is similar and can be used as a healthy alternative; in Comparative Example 1, when tapioca starch is used instead, the whiteness and hiding power decrease significantly; when CaCO3 is used instead, serious sedimentation will occur; in Comparative Example 3, when the non-microspherized protein is directly added, the whiteness value decreases and the sedimentation rate increases, verifying that the microsphere structure (0.1–5 μm) can efficiently scatter visible light wavelengths, and non-spherical proteins are prone to aggregation and failure; in Comparative Example 4, when ordinary cellulose is used to replace the banana extract residue, the sedimentation rate increases; from Comparative Examples 5-7, it can be seen that sodium D-isoascorbate, L-ascorbic acid, and citric acid play a synergistic color protection role.

[0062] It is proved that the pectin / polysaccharide of the banana extract is the key to maintaining the colloidal stability and the basis of whiteness.

[0063] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any indirect modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A plant-based alternative to titanium white liquid, characterized in that: It contains the following components in parts by weight: 30 - 50 parts of banana extract, 5 - 15 parts of nanocellulose, 15 - 30 parts of whey protein microspheres, 0.5 - 2 parts of color fixative, 5 - 10 parts of sucrose, 1 - 3 parts of locust bean gum; The nanocellulose is prepared from the filter residue of banana extract; The whey protein microspheres serve as a light scattering enhancing component, and the particle size of the whey protein microspheres is 0.1 - 5 μm.

2. The plant-based titanium white liquid substitute according to claim 1, wherein: The preparation of the banana extract includes the following steps: A1. Select bananas with a maturity of 6 - 8 points, peel them, and add 1.5 - 2.5 times the mass of the bananas of deionized water to make a pulp; A2. Add 0.02 - 0.08 wt% pectinase and 0.03 - 0.07 wt% cellulase to the banana pulp water obtained in step A1 for enzymatic hydrolysis; A3. Add 0.002 - 0.01% tannase to the enzymatic hydrolysate in step A2 for enzymatic deastringency; A4. Heat the enzymatic hydrolysate in step A3 to 85 - 90 °C, hold for 10 - 15 min to inactivate the enzymes, then filter to obtain the filtrate and concentrate and dry it.

3. The titanium white liquid substitute based on plants according to claim 2, characterized in that: The pH of the enzymatic hydrolysis in step A2 is 4.2 - 4.6, the temperature is 22 - 28 °C, and the enzymatic hydrolysis time is 40 - 80 min.

4. A plant-based alternative to titanium white liquid according to claim 2, characterized in that: The pH of the enzymatic deastringency in step A3 is 5.0 - 6.0, the temperature is 40 - 50 °C, and the time is 1 - 3 h.

5. A plant-based alternative to titanium white liquid according to claim 1, characterized in that: The preparation method of the nanocellulose includes the following steps: B1. Dry and crush the filter residue obtained by filtering the banana extract; B2. Immerse the crushed filter residue in a 0.5 - 1% H2SO4 solution for acid hydrolysis, and then neutralize it with NaOH to pH 6.8 - 7.4; B3. Subject the mixture obtained in step B2 to high-pressure homogenization circulation at 180 - 220 MPa, and then separate and dry it.

6. A plant-based alternative to titanium white liquid according to claim 5, characterized in that: The particle size of the nanocellulose is 200 - 500 nm.

7. A plant-based alternative to titanium white liquid according to claim 1, characterized in that: The preparation method of the whey protein microspheres is as follows: C1. Heat-treat an 8 - 10% whey protein isolate solution at 80 - 85 °C for 20 - 40 min; C2. Use the protein solution after heat treatment in step C1 as the water phase, and 0.2 - 0.8% Span 80 corn oil as the oil phase, and emulsify at a flow rate ratio of water:oil = 1:4 - 6 to obtain a W / O emulsion; C3. Add 10 - 15 U / g protein of transglutaminase to the emulsion obtained in step C2, and carry out a cross-linking reaction at 45 - 55 °C for 40 - 80 min; C4. After demulsifying, separating, and washing the cross-linked emulsion in step C3, add 20 - 30 wt% maltodextrin, and spray dry to obtain microsphere powder.

8. A plant-based alternative to titanium white liquid according to claim 1, characterized in that: The color fixative includes: sodium D-isoascorbate, L-ascorbic acid, and citric acid; the mass ratio of sodium D-isoascorbate, L-ascorbic acid, and citric acid is 1 - 5:0.5 - 2:3 - 10.

9. A substitute for titanium white liquid based on plants as described in any one of claims 1-8, characterized in that: It includes the following preparation steps: (1) Mix the banana extract, sucrose, and locust bean gum evenly; (2) Add nanocellulose and whey protein microspheres to the mixture obtained in step (1) in sequence and mix evenly; (3) Add the color fixative to the mixture obtained in step (2) and mix evenly, and then vacuum package to obtain a plant-based titanium white liquid substitute.

10. A plant-based alternative to titanium white liquid as described in any one of claims 1-9, characterized in that: It is used to replace or partially replace titanium dioxide in the compound seasoning formula for whitening.

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