Down feather heat preservation finishing agent and preparation method thereof

Abstract

The invention relates to a down feather heat preservation finishing agent and a preparation method thereof, and belongs to the field of down feather finishing agents, the down feather heat preservation finishing agent is prepared from the following raw materials: a cyclodextrin derivative, functional powder, 2, 2 '-disulfonic acid benzidine and deionized water, the cyclodextrin derivative is obtained by sequentially mixing dimethyl sulfoxide, a ginkgo leaf fermentation product, pullulanase and ethanol into beta-cyclodextrin, then carrying out centrifugal treatment to obtain a precipitate, and finally drying the precipitate. A cyclodextrin derivative contained in the down feather heat-preservation finishing agent is beta-cyclodextrin modified by ginkgo leaf leavening, and the down feather heat-preservation finishing agent further comprises functional powder which is obtained by taking a zirconium diboride precursor solution as a raw material, mixing with mint essential oil and matching with a high-temperature calcination means, so that after the down feather heat-preservation finishing agent is applied to down feather, the heat preservation effect of the down feather is improved; the heat preservation performance of the down feather can be enhanced, and the heat preservation performance of the down feather can be stably maintained for a long time.

Description

Technical Field

[0001] The present invention belongs to the field of down finishing agents, and particularly relates to a down heat preservation finishing agent and a preparation method thereof. Background Art

[0002] Down fiber is a natural protein fiber with a special branched structure. A large amount of static air can be stored in its branched structure, making the down fiber have excellent heat preservation performance. However, untreated down has problems such as poor smell, easy agglomeration, and poor fluffiness caused by poor cleanliness. Therefore, in the existing down processing process, it is necessary to successively process down through washing, sterilization, degreasing, and drying. With the increasing demand for refinement of down products by consumers, different types of down finishing agents are used in the existing down processing process to endow down with corresponding functions.

[0003] Most of the existing down heat preservation finishing agents are used for impregnating down. During the impregnation process, the corresponding functional components of the down finishing agent can modify the down or adhere to the down, thereby improving the heat preservation performance of the down and reducing the requirement for the filling amount of the down. Among them, the commonly used functional components include graphene, carbon nanotubes, zirconium carbide, and aerogel, etc. With the far-infrared performance, phase change performance, and heat insulation performance of the functional components, a better heat preservation effect can be achieved. However, although the use of a down heat preservation finishing agent containing such functional components can improve the heat preservation performance of the down after being applied to the down, it is easy to damage the down body during the processing, and the adhesion of the functional material will directly affect the recovery effect after the deformation of the down. The above negative effects will cause the down to be more likely to agglomerate, resulting in a rapid and significant decline in the heat preservation performance of the down during long-term use and repeated washing. In view of this, the present invention provides a down heat preservation finishing agent and a preparation method thereof. Summary of the Invention

[0004] The purpose of the present invention is to provide a down heat preservation finishing agent and a preparation method thereof in order to solve the above problems.

[0005] The present invention achieves the above purpose through the following technical solutions:

[0006] The present invention provides a down heat preservation finishing agent, and the preparation raw materials of the down heat preservation finishing agent include cyclodextrin derivatives, functional powder, 2,2'-bisulfonic acid benzidine, and deionized water;

[0007] The cyclodextrin derivative is obtained by successively mixing dimethyl sulfoxide, ginkgo leaf ferment, pullulanase, and ethanol into β-cyclodextrin, then centrifuging to obtain a precipitate, and finally drying the precipitate;

[0008] The functional powder is obtained by adding pre-mixed peppermint essential oil and triethanolamine to a zirconium diboride precursor solution, followed by low-temperature drying treatment, calcination treatment, and grinding treatment in sequence.

[0009] As a further optimized solution of the present invention, by weight, the raw materials for preparing the down thermal insulation finishing agent include 10-15 parts of cyclodextrin derivative, 8-12 parts of functional powder, 3-6 parts of 2,2'-bisulfonic acid benzidine, and 10-15 parts of deionized water.

[0010] As a further optimized solution of the present invention, by weight, the raw materials for preparing the cyclodextrin derivative include 5-10 parts of β-cyclodextrin, 10-15 parts of ginkgo leaf ferment, 4-7 parts of dimethyl sulfoxide, and 3-6 parts of pullulanase.

[0011] As a further optimized solution of the present invention, by weight, the raw materials for preparing the functional powder include 10-15 parts of zirconium diboride precursor solution, 3-6 parts of peppermint essential oil, and 2-5 parts of triethanolamine.

[0012] As a further optimized solution of the present invention, the preparation method of the ginkgo leaf ferment is as follows: Mix the dried ginkgo leaf powder and water in a mass ratio of 1:5, stir evenly, adjust the pH value to 3, then place the obtained ferment at 115°C for 10 minutes of sterilization treatment. After the ferment naturally cools down to 25°C, add Trichoderma reesei seed liquid to the ferment, and the addition amount is 7% of the mass of the ginkgo leaf powder. Finally, place the ferment at 30°C for aerobic fermentation for 8 days to obtain a fermentation product. After filtering and separating the fermentation product, take the filtrate as the ginkgo leaf ferment.

[0013] As a further optimized solution of the present invention, the preparation method of the zirconium diboride precursor solution is as follows: Mix zirconium polyacetylacetonate, boric acid, and phenolic resin in a molar ratio of 1:2:1, and fully stir to obtain the zirconium diboride precursor solution.

[0014] The present invention also provides a preparation method of a down thermal insulation finishing agent, including the following steps:

[0015] S1. Mix dimethyl sulfoxide, ginkgo leaf ferment, pullulanase, and ethanol into β-cyclodextrin in sequence, then obtain a precipitate through centrifugation treatment, and obtain a cyclodextrin derivative after vacuum drying treatment of the precipitate;

[0016] S2. Pre-mix peppermint essential oil and triethanolamine, then mix the obtained product into the zirconium diboride precursor solution and stir fully. Perform freeze-drying treatment, calcination treatment, and grinding treatment on the obtained mixture in sequence to obtain the functional powder;

[0017] S3. Crush the cyclodextrin derivative and dissolve it in a mixed solution of 2,2'-bis-sulfonic acid benzidine and deionized water, and then ultrasonically disperse the functional powder into the obtained mixture to obtain the down thermal insulation finishing agent.

[0018] As a further optimized scheme of the present invention, in S1, the temperature condition of vacuum drying is 55°C - 75°C, and the drying duration is 2 - 4 h.

[0019] As a further optimized scheme of the present invention, the temperature condition of freeze-drying treatment is -60°C - -30°C, the drying duration is 1.5 - 2.5 h, and the calcination treatment condition is to uniformly heat up to 850°C - 950°C under a nitrogen protection atmosphere, and the calcination duration is 2 - 5 h.

[0020] The beneficial effects of the present invention are as follows:

[0021] After the down thermal insulation finishing agent provided by the present invention is used for impregnating and processing down, the cyclodextrin derivative therein can graft-modify the down fiber, and the functional particles are included in the cyclodextrin grafted on the down fiber. On the one hand, the cyclodextrin derivative adopted by the present invention is β-cyclodextrin modified by ginkgo leaf ferment, which can not only improve the grafting effect, but also indirectly improve the external structure of the down fiber, which is beneficial to reducing the probability of agglomeration and breakage of down during the washing process. On the other hand, the functional particles adopted by the present invention are modified zirconium diboride obtained by using zirconium diboride precursor solution as the raw material, mixing peppermint essential oil and cooperating with high-temperature calcination means. During the preparation process, the conversion process of the zirconium diboride precursor and the carbonization process of the peppermint essential oil are carried out synchronously. After the obtained functional particles are attached to the down fiber, the influence on the fluffiness of the down fiber is small. Therefore, after the down thermal insulation finishing agent is applied to down, it can not only effectively improve the thermal insulation performance of down, but also be beneficial to the long-term maintenance of the thermal insulation performance of down. Specific Embodiments

[0022] The following further describes the present application in detail. It is necessary to point out here that the following specific embodiments are only used for further illustration of the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0023] I. Materials

[0024] The methods used in the present invention are all conventional methods known to those skilled in the art unless otherwise specified, and the reagents and other materials used are all commercially available products unless otherwise specified.

[0025] The present invention uses liquid pullulanase with a concentration of 1 u / mg;

[0026] The mass concentration of ethanol adopted by the present invention is 65%.

[0027] 2. Methods

[0028] Example 1

[0029] A down thermal insulation finishing agent, the preparation method is as follows:

[0030] S1. Mix the dried ginkgo leaf powder with water at a mass ratio of 1:5, stir evenly and adjust the pH value to 3, then sterilize the obtained fermented product at 115°C for 10 minutes, let the fermented product cool down naturally to 25°C, add Trichoderma reesei seed solution to the fermented product, and add 7% of the mass of the ginkgo leaf powder. Finally, place the fermented product at 30°C for aeration fermentation for 8 days to obtain a fermentation product, filter and separate the fermented product, and take the filtrate as the ginkgo leaf fermented product. Take 10 parts of β-cyclodextrin, 10 parts of ginkgo leaf fermented product, 4 parts of dimethyl sulfoxide, 3 parts of pullulanase and 9 parts of ethanol by weight, mix dimethyl sulfoxide, ginkgo leaf fermented product, pullulanase and ethanol into β-cyclodextrin in turn, and then obtain a precipitate by centrifugation, and dry the precipitate in a vacuum drying oven at 55°C for 4 hours to obtain a cyclodextrin derivative;

[0031] S2. Mix zirconium polyacetylacetonate, boric acid, and phenolic resin in a molar ratio of 1:2:1, and stir thoroughly to obtain a zirconium diboride precursor solution. Take 15 parts of zirconium diboride precursor solution, 3 parts of peppermint essential oil, and 2 parts of triethanolamine by weight, premix the peppermint essential oil with triethanolamine, and then mix the obtained product into the zirconium diboride precursor solution and stir thoroughly. The obtained mixture is freeze-dried, calcined, and ground in sequence to obtain a functional powder. During the process, the temperature of the freeze-drying treatment is minus 30°C for 2.5 hours. The calcination treatment is carried out under nitrogen protection. During the calcination process, the temperature is uniformly increased to the highest temperature and then the calcination is continued. The highest calcination temperature is 850°C, the heating rate is 5°C / min, the total calcination time is 5 hours, and the fineness standard of the grinding treatment is 600nm.

[0032] S3. Take 10 parts of cyclodextrin derivatives, 12 parts of functional powders, 6 parts of 2,2'-diphenylamine sulfonate and 10 parts of deionized water by weight, grind the cyclodextrin derivatives and dissolve them in a mixture of 2,2'-diphenylamine sulfonate and deionized water, then ultrasonically disperse the functional powder into the obtained mixture, and after fully stirring the reaction, obtain a down thermal insulation finishing agent.

[0033] Example 2

[0034] A down thermal insulation finishing agent, the preparation method is as follows:

[0035] S1. Take 5 parts of β-cyclodextrin, 15 parts of ginkgo leaf fermentation product, 7 parts of dimethyl sulfoxide, 6 parts of pullulanase and 17 parts of ethanol by weight, wherein the preparation method of the ginkgo leaf fermentation product is the same as that of Example 1, dimethyl sulfoxide, ginkgo leaf fermentation product, pullulanase and ethanol are sequentially mixed into β-cyclodextrin, and then centrifuged to obtain a precipitate, and the precipitate is placed in a vacuum drying oven at 75° C. and dried for 2 hours to obtain a cyclodextrin derivative;

[0036] S2, by weight, take 10 parts of zirconium diboride precursor solution, 6 parts of peppermint essential oil and 5 parts of triethanolamine, wherein the preparation method of the zirconium diboride precursor solution is the same as that of Example 1, the peppermint essential oil and triethanolamine are premixed, and then the obtained product is mixed into the zirconium diboride precursor solution and fully stirred, and the obtained mixture is freeze-dried, calcined and ground in sequence to obtain a functional powder, during which the freeze-drying temperature is minus 60°C for 1 hour, the calcination is carried out under nitrogen protection, the temperature is uniformly increased to the maximum temperature during the calcination process, and the calcination is continued, the maximum calcination temperature is 950°C, the heating rate is 15°C / min, the total calcination time is 2 hours, and the fineness standard of the grinding treatment is 900nm;

[0037] S3. Take 15 parts of cyclodextrin derivatives, 8 parts of functional powders, 3 parts of 2,2'-diphenylamine sulfonate and 15 parts of deionized water by weight, grind the cyclodextrin derivatives and dissolve them in a mixture of 2,2'-diphenylamine sulfonate and deionized water, then ultrasonically disperse the functional powder into the obtained mixture, and after fully stirring the reaction, obtain a down thermal insulation finishing agent.

[0038] Example 3

[0039] A down thermal insulation finishing agent, the preparation method is as follows:

[0040] S1. Take 8 parts of β-cyclodextrin, 12 parts of ginkgo leaf fermentation product, 5 parts of dimethyl sulfoxide, 5 parts of pullulanase and 14 parts of ethanol by weight, wherein the preparation method of the ginkgo leaf fermentation product is the same as that of Example 1, and sequentially mix dimethyl sulfoxide, ginkgo leaf fermentation product, pullulanase and ethanol into β-cyclodextrin, and then centrifuge to obtain a precipitate, and place the precipitate in a vacuum drying oven at 68° C. and dry for 3 hours to obtain a cyclodextrin derivative after treatment;

[0041] S2, by weight, take 13 parts of zirconium diboride precursor solution, 5 parts of peppermint essential oil and 4 parts of triethanolamine, wherein the preparation method of the zirconium diboride precursor solution is the same as that of Example 1, the peppermint essential oil and triethanolamine are premixed, and then the obtained product is mixed into the zirconium diboride precursor solution and fully stirred, and the obtained mixture is freeze-dried, calcined and ground in sequence to obtain a functional powder, during which the temperature of the freeze-drying treatment is minus 40°C for 1.5 hours, the calcination treatment is carried out under nitrogen protection, the temperature is uniformly increased to the maximum temperature during the calcination process, and the calcination is continued, the maximum calcination temperature is 900°C, the heating rate is 10°C / min, the total calcination time is 3 hours, and the fineness standard of the grinding treatment is 700nm;

[0042] S3. Take 12 parts of cyclodextrin derivatives, 10 parts of functional powders, 4 parts of 2,2'-diphenylamine sulfonate and 13 parts of deionized water by weight, grind the cyclodextrin derivatives and dissolve them in a mixture of 2,2'-diphenylamine sulfonate and deionized water, then ultrasonically disperse the functional powder into the obtained mixture, and after fully stirring the reaction, obtain a down thermal insulation finishing agent.

[0043] In order to further explore the effect of cyclodextrin derivatives on the effect of down thermal insulation finishing agent, comparative example 1 and comparative example 2 were set based on Example 3, and the specific settings are as follows:

[0044] Comparative Example 1

[0045] Based on Example 3, S1 was omitted, and the cyclodextrin derivative used in S3 was replaced by an equal amount of β-cyclodextrin.

[0046] Comparative Example 2

[0047] Based on Example 3, only the fermented ginkgo leaf used in preparing the cyclodextrin derivatives in S1 was replaced with an equal amount of citric acid.

[0048] In order to further explore the effect of the functional powder on the effect of the down thermal insulation finishing agent, comparative examples 3 and 4 were set based on Example 3, and the specific settings are as follows:

[0049] Comparative Example 3

[0050] Based on Example 3, S2 was omitted, and the functional powder used in S3 was replaced by an equal amount of zirconium diboride powder with a fineness of 700 nm.

[0051] Comparative Example 4

[0052] Based on Example 3, only replace the zirconium diboride precursor solution used in S2 with an equal amount of zirconium oxide precursor solution. The preparation method of the zirconium oxide precursor solution is as follows: Take appropriate amounts of basic zirconium carbonate, glacial acetic acid, yttrium acetate tetrahydrate, and polyethylene oxide according to a mass ratio of 10:16:7:0.1. Mix the basic zirconium carbonate and glacial acetic acid, then place it under stirring reaction at 30°C. Then add yttrium acetate tetrahydrate and polyethylene oxide to the reaction product, and obtain the zirconium oxide precursor after sufficient stirring.

[0053] III. Efficacy Detection of Down Insulation Finishing Agent

[0054] Take equal amounts of samples from the down insulation finishing agents prepared in each group, and perform a 20-fold dilution treatment on each group of samples with pure water. Add an equal amount of down to each group of diluted solutions, take out each group of down after impregnation for 2h, and obtain down samples corresponding to each group of examples and comparative examples one by one.

[0055] Take untreated down as the blank example, and perform heat preservation tests on the down samples corresponding to each group of examples, comparative examples, and the blank example in sequence. The detection method is as follows: Put a fixed amount of down into a sampling cloth bag with a pillowcase structure, and then refer to the methods and standards of GB / T 39074-2020 "Detection and Evaluation of Thermal Insulation Performance of Textiles" to perform a primary detection on the heat preservation of the bagged down. Then refer to the standard washing program set by AATCC, perform 5 times of water washing treatment on the bagged down, dry the washed down, and then perform a secondary detection on the heat preservation of the bagged down. The detection results are shown in the following table:

[0056]

[0057] It can be seen from the above table that:

[0058] 1. The heat preservation of the down samples corresponding to Examples 1-3 is significantly better than that of the blank example. After washing, the decline in the heat preservation performance of the down samples is 5%-8%, which is significantly better than 45% of the blank example. This result shows that the down insulation finishing agent provided by the present invention not only improves the heat preservation of down, but also helps the down maintain its heat preservation after washing, comprehensively achieving the effect of strengthening the long-term heat preservation of down. The reason for achieving this effect is that the cyclodextrin derivative grafted on the down fiber can indirectly change some structural characteristics of the down fiber and achieve the effect of encapsulating the functional powder, so that the functional powder can adhere to the down to enhance the heat insulation performance of the down, thereby enhancing the heat preservation effect;

[0059] 2. The initial heat retention data of the down samples corresponding to Comparative Examples 1-4 are all worse than those of Example 3. Among them, the initial heat retention of the down samples corresponding to Comparative Examples 3 and 4 is the worst, indicating that compared with the commonly used zirconium boride powder and zirconia components, the functional powder obtained by mixing, drying and calcining with zirconium boride precursor solution, peppermint essential oil and triethanolamine as raw materials provided by the present invention can achieve better empowerment effect. It is inferred that the reason is that during the high-temperature calcination process, the carbonization process of peppermint essential oil and the conversion process of zirconium boride precursor solution proceed synchronously and influence each other, indirectly realizing the effect of modified zirconium boride, and then achieving a better improvement effect on the performance of down. On the other hand, in Comparative Examples 1 and 2, the replacement of cyclodextrin derivatives and the adjustment of their preparation methods also led to a decrease in the heat retention of down. The reason may be that the cyclodextrin derivatives provided by the present invention can achieve better grafting and inclusion effects;

[0060] 3. The decline in heat retention of the down samples corresponding to Comparative Examples 1-4 after washing is greater than that of Example 3.

[0061] In order to further explore the reasons for the different degrees of decline in heat retention rate of down samples after washing, and the influence of the composition and preparation of cyclodextrin derivatives and functional powder on this, relevant performance tests were further carried out on the down samples corresponding to Example 3 and Comparative Examples 1-4. The test items and methods are as follows:

[0062] ① Fluffiness detection: Take a certain amount of down and put it into a sampling cloth bag with a pillowcase structure. Refer to the standard machine washing procedure set by AATCC and perform 5 times of washing treatment on the bagged down. Before and after washing, refer to the execution standard of GBT10288-2016 "Testing Methods for Down and Feather", and perform a fluffiness test on the down respectively. Calculate the fluffiness reduction caused by washing according to the difference in fluffiness before and after washing. The calculation formula is

[0063] ② Clumping rate detection: Take a certain amount of down and record the weight of the down at this time as M1. Then put the down into a sampling cloth bag with a pillowcase structure. Refer to the standard machine washing procedure set by AATCC and perform 10 times of washing treatment on the bagged down. After the washing treatment, dry the bagged down. After drying completely, take out the down in the bag, pick out the clumped down and weigh the remaining down for the second time. Record the data obtained from the second weighing as M2. Finally, calculate the clumping rate according to the weight difference of the down. The calculation formula is:

[0064] ③Detection of the anti - fracture performance of down clusters: Take a certain amount of down, record the weight of the down at this time as MA. Then put the down into a sampling cloth bag with a pillowcase structure and conduct 15 water - washing treatments on the bagged down according to the standard machine - washing procedure set by AATCC. After the water - washing treatment, dry the bagged down. After complete drying, take out the down in the bag and disassemble the agglomerated down. Then pick out the down clusters among them, and conduct a secondary weighing on the remaining down filaments after picking. Record the data obtained from the secondary weighing as MB. Finally, calculate the fracture rate according to the weight difference of the down. The calculation formula is:

[0065] The corresponding test results of each group are shown in the following table:

[0066]

[0067] It can be seen from the above table that: Compared with Example 3, the down samples corresponding to the down thermal insulation finishing agents A - D in Comparative Examples 1 - 4 have worse anti - agglomeration ability and anti - fracture ability during the water - washing process, and the decrease in fluffiness after water - washing is greater. Among them, the down samples corresponding to Comparative Examples 1 and 2 have the highest agglomeration rate and fracture rate, while the down samples corresponding to Comparative Examples 3 and 4 have the largest decrease in fluffiness. This result shows that based on the preparation method of grafting down fibers with cyclodextrin derivatives and then encapsulating functional powders adopted in the present invention, compared with the cyclodextrin derivatives obtained by using β - cyclodextrin or by conventionally modifying β - cyclodextrin with citric acid, the cyclodextrin derivative obtained by modifying β - cyclodextrin with ginkgo leaf ferment in the present invention is beneficial to reducing the agglomeration rate and fracture rate of down; compared with the existing zirconium diboride or the modified zirconium oxide obtained by using the modification means of this application, the modified zirconium diboride obtained by using zirconium diboride precursor solution as the raw material, mixing peppermint essential oil and cooperating with high - temperature calcination means as the functional powder in the present invention is beneficial to improving the effect of maintaining the fluffiness of down.

[0068] The above - mentioned embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A down thermal insulation finishing agent, characterized in that: The raw materials for preparing the down thermal insulation finishing agent include cyclodextrin derivatives, functional powder, 2,2'-disulfonic acid benzidine and deionized water; The cyclodextrin derivative is obtained by sequentially mixing dimethyl sulfoxide, ginkgo leaf fermentation product, pullulanase and ethanol into β-cyclodextrin, then subjecting the mixture to centrifugal treatment to obtain a precipitate, and finally subjecting the precipitate to drying treatment; The functional powder is obtained by adding premixed peppermint essential oil and triethanolamine to a zirconium diboride precursor solution, and then performing low-temperature drying, calcination and grinding in sequence.

2. A down thermal insulation finishing agent according to claim 1, characterized in that: The raw materials for preparing the down thermal insulation finishing agent include 10-15 parts of cyclodextrin derivatives, 8-12 parts of functional powders, 3-6 parts of 2,2'-bissulfonic acid benzidine and 10-15 parts of deionized water in parts by weight.

3. A down thermal insulation finishing agent according to claim 1, characterized in that: By weight, the raw materials for preparing the cyclodextrin derivative include 5-10 parts of beta-cyclodextrin, 10-15 parts of ginkgo leaf fermentation product, 4-7 parts of dimethyl sulfoxide, 3-6 parts of pullulanase and 9-17 parts of ethanol.

4. A down thermal insulation finishing agent according to claim 1, characterized in that: In parts by weight, the raw materials for preparing the functional powder include 10-15 parts of zirconium diboride precursor solution, 3-6 parts of peppermint essential oil and 2-5 parts of triethanolamine.

5. A down thermal insulation finishing agent according to claim 1, characterized in that: The preparation method of the ginkgo leaf fermented product comprises the following steps: mixing dried ginkgo leaf powder and water at a mass ratio of 1:5, stirring evenly and adjusting the pH value to 3, sterilizing the obtained fermented product at 115° C. for 10 minutes, cooling the fermented product naturally to 25° C., adding Trichoderma reesei seed liquid to the fermented product in an amount of 7% of the mass of the ginkgo leaf powder, and finally fermenting the fermented product at 30° C. for 8 days with ventilation to obtain a fermented product, filtering and separating the fermented product, and taking the filtrate as the ginkgo leaf fermented product.

6. A down thermal insulation finishing agent according to claim 1, characterized in that: The preparation method of the zirconium diboride precursor solution is as follows: poly(zirconium acetylacetonate), boric acid and phenolic resin are mixed in a molar ratio of 1:2:1, and the zirconium diboride precursor solution is obtained after sufficient stirring.

7. A method for preparing the down thermal insulation finishing agent according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, sequentially mixing dimethyl sulfoxide, ginkgo leaf fermentation product, pullulanase and ethanol into β-cyclodextrin, and then centrifuging to obtain a precipitate, and vacuum drying the precipitate to obtain a cyclodextrin derivative; S2, premixing peppermint essential oil and triethanolamine, mixing the obtained mixture into a zirconium diboride precursor solution and stirring the mixture sufficiently, and sequentially freeze-drying, calcining and grinding the obtained mixture to obtain a functional powder; S3, the cyclodextrin derivative is crushed and dissolved in a mixture of 2,2'-disulfonic acid benzidine and deionized water, and the functional powder is ultrasonically dispersed into the obtained mixture to obtain a down thermal insulation finishing agent.

8. The method for preparing the down thermal insulation finishing agent according to claim 7, characterized in that: In S1, the vacuum drying temperature is 55°C-75°C, and the drying time is 2-4h.

9. The method for preparing the down thermal insulation finishing agent according to claim 7, characterized in that: In S2, the temperature condition of freeze drying treatment is -60°C--30°C, the drying time is 1.5-2.5h, and the condition of calcination treatment is uniformly heating to 850°C-950°C under nitrogen protection atmosphere, and the calcination time is 2-5h.

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