Preparation method and application of non-woven flocculus with phase-change temperature regulation function

Abstract

The invention discloses a preparation method of a non-woven flocculus with a phase change temperature regulation function, and particularly relates to the technical field of non-woven flocculus, the preparation method comprises the following steps: step 1, treatment of carbon nanotubes; 2, preparing a phase change material core; step 3, preparing a phase change energy storage microcapsule; step 4, preparing the phase-change temperature-adjusting fiber; and 5, preparing the non-woven flocculus. A large number of wrinkles and scaly structures can be generated on the surface of the expanded graphite powder, so that the surface area of the graphite powder is increased, paraffin can be adsorbed on the expanded graphite powder, and then the modified carbon nanotubes are added, so that the heat conduction effect of the phase change material core is improved, and the intelligent temperature regulation effect of the phase change material core is improved; the carbon nano tube is coated with ammoniated nano titanium dioxide particles, the dispersity of the carbon nano tube is improved, the heat conduction performance of the phase change material core is improved, and the nano titanium dioxide particles have a certain temperature adjusting effect, so that the temperature adjusting effect of the non-woven flocculus is better.

Description

Technical Field

[0001] The present invention relates to the technical field of non-woven flakes, and more specifically, to a preparation method and application of a non-woven flake with phase-change temperature-regulating function. Background Art

[0002] Flakes refer to small flakes of flocculent sediments, and can also refer to sheet-like cotton materials made of plant fibers, animal fibers or chemical fibers for warmth, heat insulation or shockproof. Non-woven flakes are one of the raw materials for making textiles. With the continuous improvement of people's living standards, people's requirements for clothing supplies are getting higher and higher. In order to improve the comfort of wearing clothes, some clothing textiles are made of phase change materials. Phase change materials are a new type of environmentally friendly materials that absorb or release heat in the form of latent heat by relying on their own reversible phase change when the temperature of the external environment changes. If the phase change material is mixed into the fiber or coated on the surface of the textile, the textile can be given an intelligent temperature regulation function. With the phase change of the phase change material contained in the textile, the textile can absorb heat from the environment and store it inside the textile or release the stored heat according to the change of the external environment temperature, forming a microclimate with a basically constant temperature around the textile. Thereby realizing the temperature regulation function and improving the comfort of textiles and clothing. This type of textile product with automatic heat storage and regulation function is called intelligent temperature regulation textile.

[0003] The phase change materials used in existing non-woven flakes for clothing textiles are mostly phase change temperature regulating materials such as paraffin, fatty acids, fatty alcohols, sugar alcohols, polyethylene glycol, n-nonadecane, n-eicosane, n-heneicosane or graphene. Due to the poor thermal conductivity of the above phase change materials, the phase change temperature regulating effect of the non-woven flakes is poor, which cannot meet people's use needs in clothing textiles. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a method for preparing a non-woven flake with phase change temperature regulation function. The problem to be solved by the present invention is: how to improve the phase change temperature regulation effect of the non-woven flake.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for preparing a phase-change temperature-regulating nonwoven flocculent sheet, comprising the following steps:

[0006] Step 1: Treatment of carbon nanotubes: dispersing carbon nanotubes in a strong acid solution, ultrasonically treating to obtain a dispersion, adding aminated nano-titanium dioxide particles to the dispersion, ultrasonically treating at 55-62° C. for 10-20 min, and then filtering and drying to obtain modified carbon nanotubes;

[0007] Step 2: Preparation of the phase change material core, weighing graphite powder and placing it in a vacuum drying oven for drying treatment, and then performing high-temperature expansion to obtain expanded graphite powder after the drying treatment is completed. The expanded graphite powder is mixed with paraffin and then subjected to vacuum heating treatment, and then cooled to room temperature, and the modified carbon nanotubes obtained in step 1 are added and stirred to mix uniformly to obtain the phase change material core;

[0008] Step 3: Preparation of phase change energy storage microcapsules, emulsification, dispersion and condensation reaction of the phase change material core, coating material and water, after the reaction is completed, adding a curing agent for cross-linking reaction to obtain phase change energy storage microcapsules;

[0009] Step 4: Preparation of phase change thermostatic fiber: mixing phase change energy storage microcapsules with polyethylene slices and graphene oxide / carbon fiber slices, stirring at 500-600 rpm and 40-50° C. for 30-40 min to obtain a premix, and adding the premix to a melt spinning screw extruder to form a phase change thermostatic fiber;

[0010] Step 5: Preparation of non-woven flakes: combing the phase change temperature regulating fibers into a web, and hot-rolling the webs with a first roller and a second roller to obtain a phase change temperature regulating functional non-woven flakes.

[0011] In a preferred embodiment, the strong acid solution in step 1 is a mixture of concentrated sulfuric acid and concentrated nitric acid, and the volume ratio of the concentrated sulfuric acid to the concentrated nitric acid is 1:(0.2-0.5), and the frequency of the ultrasonic treatment in step 1 is 1.2-1.6 MHz.

[0012] In a preferred embodiment, the added amount of the nano titanium dioxide particles is 0.3-0.6 of the mass of the carbon nanotubes, and the drying temperature in step 1 is 60-80°C.

[0013] In a preferred embodiment, the vacuum drying in step 2 is performed at a temperature of 80-100°C and a drying time of 8-10 hours, and the high temperature expansion in step 2 is performed at a temperature of 850-950°C and an expansion time of 20-40 seconds.

[0014] In a preferred embodiment, the mass ratio of expanded graphite powder, paraffin wax and modified carbon nanotubes in step 2 is 1: (6-10), (0.05-0.15), and the temperature during vacuum heating in step 2 is 40-50°C.

[0015] In a preferred embodiment, the coating material in step three is a mixture of gelatin and gum arabic, and the mass ratio of the gelatin to gum arabic is 1:1, the mass ratio of the phase change material core, the coating material and water in step three is 1:(1.2-1.6):(1-1.5), the curing agent is diethylenetriamine, and the condensation reaction is stirred at a stirring speed of 1300-1600 rpm and a reaction temperature of 18-25°C.

[0016] In a preferred embodiment, the preparation method of the graphene oxide / carbon fiber slices in the step 4 is: cut the carbon fiber and put it into acetone for reflux and then take it out and dry it, soak the dried carbon fiber in concentrated nitric acid, ultrasonically treat it at 55-65°C for 3-4h, then rinse and dry it to obtain oxidized carbon fiber, add silane coupling agent and graphene oxide to the oxidized carbon fiber, stir and mix well, and then vacuum dry it to obtain graphene oxide / carbon fiber slices.

[0017] In a preferred embodiment, the mass ratio of the oxidized carbon fiber, graphene oxide and silane coupling agent is 1:(0.5-0.8):(0.08-0.15), and the mass ratio of the polyethylene slice, graphene oxide / carbon fiber slice and phase change energy storage microcapsule in the step 4 is 100:(60-80):(0.5-1.5).

[0018] In a preferred embodiment, in step five, the temperature of the first roller is 150-155°C, and the temperature of the second roller is 160-165°C.

[0019] Application of phase change temperature regulating functional non-woven floss, the phase change temperature regulating functional non-woven floss is used for clothing textiles.

[0020] Technical effects and advantages of the present invention:

[0021] 1. The non-woven flakes prepared by the preparation method of the present invention use polyethylene slices and graphene oxide / carbon fiber slices as raw materials, and are added with phase change energy storage microcapsules, which include modified carbon nanotubes, graphite powder and paraffin. Expanded graphite powder is mixed with paraffin. After the graphite powder is expanded, a large number of wrinkles and flaky structures will be generated on the surface, so that the surface area of ​​the graphite powder is increased. Then, the graphite powder is mixed with paraffin in a vacuum heating manner, so that the paraffin can be adsorbed on the expanded graphite powder. Then, modified carbon nanotubes are added to increase the thermal conductivity of the core of the phase change material, thereby improving the intelligent temperature control effect of the core of the phase change material. The carbon nanotubes are coated with aminated nano-titanium dioxide particles, which not only improves the dispersibility of the carbon nanotubes and the thermal conductivity of the core of the phase change material, but also the nano-titanium dioxide particles themselves have a certain temperature control effect, so the temperature control effect of the non-woven flakes is better.

[0022] 2. The present invention adds graphene oxide / carbon fiber slices to reduce the use of polyethylene slices. The carbon fiber has a better thermal conductivity. In addition, the graphene oxide is loaded on the carbon fiber slices. The graphene oxide is a phase change temperature control material, which makes the non-woven flakes have a better intelligent temperature control effect. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1:

[0025] The present invention provides a method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet, comprising the following steps:

[0026] Step 1: Treatment of carbon nanotubes: dispersing carbon nanotubes in a strong acid solution, ultrasonically treating to obtain a dispersion, adding aminated nano-titanium dioxide particles to the dispersion, ultrasonically treating at 60° C. for 15 min, and then filtering and drying to obtain modified carbon nanotubes;

[0027] Step 2: Preparation of the phase change material core, weighing graphite powder and placing it in a vacuum drying oven for drying treatment, and then performing high-temperature expansion to obtain expanded graphite powder after the drying treatment is completed. The expanded graphite powder is mixed with paraffin and then subjected to vacuum heating treatment, and then cooled to room temperature, and the modified carbon nanotubes obtained in step 1 are added and stirred to mix uniformly to obtain the phase change material core;

[0028] Step 3: Preparation of phase change energy storage microcapsules, emulsification, dispersion and condensation reaction of the phase change material core, coating material and water, after the reaction is completed, adding a curing agent for cross-linking reaction to obtain phase change energy storage microcapsules;

[0029] Step 4: Preparation of phase change thermostatic fiber: mixing phase change energy storage microcapsules with polyethylene slices and graphene oxide / carbon fiber slices, stirring at 550 rpm and 45° C. for 35 min to obtain a premix, and adding the premix to a melt spinning screw extruder to form a phase change thermostatic fiber;

[0030] Step 5: Preparation of non-woven flakes: combing the phase change temperature regulating fibers into a web, and hot-rolling the webs with a first roller and a second roller to obtain a phase change temperature regulating functional non-woven flakes.

[0031] In a preferred embodiment, the strong acid solution in step 1 is a mixture of concentrated sulfuric acid and concentrated nitric acid, and the volume ratio of the concentrated sulfuric acid to the concentrated nitric acid is 1:0.3. The frequency of the ultrasonic treatment in step 1 is 1.4 MHz.

[0032] In a preferred embodiment, the added amount of the nano titanium dioxide particles is 0.5 of the mass of the carbon nanotubes, and the drying temperature in step 1 is 70°C.

[0033] In a preferred embodiment, the vacuum drying temperature in step 2 is 90° C. and the drying time is 9 hours, and the high temperature expansion temperature in step 2 is 900° C. and the expansion time is 30 seconds.

[0034] In a preferred embodiment, the mass ratio of expanded graphite powder, paraffin wax and modified carbon nanotubes in step 2 is 1:9 and 0.1, and the temperature during vacuum heating in step 2 is 45°C.

[0035] In a preferred embodiment, the coating material in step three is a mixture of gelatin and gum arabic, and the mass ratio of the gelatin to gum arabic is 1:1, the mass ratio of the phase change material core, the coating material and water in step three is 1:1.4:1.2, the curing agent is diethylenetriamine, and the condensation reaction is stirred at a stirring speed of 1500 rpm and a reaction temperature of 22°C.

[0036] In a preferred embodiment, the preparation method of the graphene oxide / carbon fiber slices in the step four is: cut the carbon fiber and put it into acetone for reflux and then take it out and dry it, soak the dried carbon fiber in concentrated nitric acid, ultrasonically treat it at 60°C for 3.5h, then rinse and dry it to obtain oxidized carbon fiber, add silane coupling agent and graphene oxide to the oxidized carbon fiber, stir and mix well, and then vacuum dry it to obtain graphene oxide / carbon fiber slices.

[0037] In a preferred embodiment, the mass ratio of the oxidized carbon fiber, graphene oxide and silane coupling agent is 1:0.65:0.12, and the mass ratio of the polyethylene slice, graphene oxide / carbon fiber slice and phase change energy storage microcapsule in step 4 is 100:70:1.

[0038] In a preferred embodiment, in step five, the temperature of the first roller is 152°C, and the temperature of the second roller is 162°C.

[0039] Application of phase change temperature regulating functional non-woven floss, the phase change temperature regulating functional non-woven floss is used for clothing textiles.

[0040] Embodiment 2:

[0041] The present invention provides a method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet, comprising the following steps:

[0042] Step 1: Preparation of the phase change material core, weighing graphite powder and placing it in a vacuum drying oven for drying treatment, and then performing high-temperature expansion to obtain expanded graphite powder after the drying treatment is completed. The expanded graphite powder is mixed with paraffin and then subjected to vacuum heating treatment, and then cooled to room temperature, and carbon nanotubes are added and stirred to obtain the phase change material core;

[0043] Step 2: Preparation of phase change energy storage microcapsules, emulsification, dispersion and condensation reaction of the phase change material core, coating material and water, after the reaction is completed, adding a curing agent for cross-linking reaction to obtain phase change energy storage microcapsules;

[0044] Step 3: Preparation of phase change thermostatic fiber: mixing phase change energy storage microcapsules with polyethylene slices and graphene oxide / carbon fiber slices, stirring at 550 rpm and 45° C. for 35 min to obtain a premix, and adding the premix to a melt spinning screw extruder to form a phase change thermostatic fiber;

[0045] Step 4: Preparation of non-woven flakes: combing the phase-change temperature-regulating fibers into a web, and hot-rolling the webs with a first roller and a second roller to obtain a phase-change temperature-regulating functional non-woven flakes.

[0046] In a preferred embodiment, the vacuum drying temperature in step 1 is 90° C. and the drying time is 9 hours, and the high temperature expansion temperature in step 1 is 900° C. and the expansion time is 30 seconds.

[0047] In a preferred embodiment, the mass ratio of expanded graphite powder, paraffin wax and carbon nanotubes in step 1 is 1:9 and 0.1, and the temperature during vacuum heating in step 1 is 45°C.

[0048] In a preferred embodiment, the coating material in step 2 is a mixture of gelatin and gum arabic, and the mass ratio of the gelatin to gum arabic is 1:1, the mass ratio of the phase change material core, the coating material and water in step 2 is 1:1.4:1.2, the curing agent is diethylenetriamine, and the condensation reaction is stirred at a stirring speed of 1500 rpm and a reaction temperature of 22°C.

[0049] In a preferred embodiment, the preparation method of the graphene oxide / carbon fiber slices in the step three is: cut the carbon fiber and put it into acetone for reflux and then take it out and dry it, soak the dried carbon fiber in concentrated nitric acid, ultrasonically treat it at 60°C for 3.5h, then rinse and dry it to obtain oxidized carbon fiber, add silane coupling agent and graphene oxide to the oxidized carbon fiber, stir and mix well, and then vacuum dry it to obtain graphene oxide / carbon fiber slices.

[0050] In a preferred embodiment, the mass ratio of the oxidized carbon fiber, graphene oxide and silane coupling agent is 1:0.65:0.12, and the mass ratio of the polyethylene slice, graphene oxide / carbon fiber slice and phase change energy storage microcapsule in step three is 100:70:1.

[0051] In a preferred embodiment, in step 4, the temperature of the first roller is 152°C, and the temperature of the second roller is 162°C.

[0052] Application of phase change temperature regulating functional non-woven floss, the phase change temperature regulating functional non-woven floss is used for clothing textiles.

[0053] Embodiment 3:

[0054] The present invention provides a method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet, comprising the following steps:

[0055] Step 1: Treatment of carbon nanotubes: dispersing carbon nanotubes in a strong acid solution, ultrasonically treating to obtain a dispersion, adding aminated nano-titanium dioxide particles to the dispersion, ultrasonically treating at 60° C. for 15 min, and then filtering and drying to obtain modified carbon nanotubes;

[0056] Step 2: Preparation of the phase change material core, weighing graphite powder and placing it in a vacuum drying oven for drying treatment, and then performing high-temperature expansion to obtain expanded graphite powder after the drying treatment is completed. The expanded graphite powder is mixed with paraffin and then subjected to vacuum heating treatment, and then cooled to room temperature, and the modified carbon nanotubes obtained in step 1 are added and stirred to mix uniformly to obtain the phase change material core;

[0057] Step 3: Preparation of phase change energy storage microcapsules, emulsification, dispersion and condensation reaction of the phase change material core, coating material and water, after the reaction is completed, adding a curing agent for cross-linking reaction to obtain phase change energy storage microcapsules;

[0058] Step 4: Preparation of phase change thermostatic fiber: mixing phase change energy storage microcapsules with polyethylene slices and carbon fiber slices, stirring at 550 rpm and 45° C. for 35 min to obtain a premix, and adding the premix to a melt spinning screw extruder to form a phase change thermostatic fiber;

[0059] Step 5: Preparation of non-woven flakes: combing the phase change temperature regulating fibers into a web, and hot-rolling the webs with a first roller and a second roller to obtain a phase change temperature regulating functional non-woven flakes.

[0060] In a preferred embodiment, the strong acid solution in step 1 is a mixture of concentrated sulfuric acid and concentrated nitric acid, and the volume ratio of the concentrated sulfuric acid to the concentrated nitric acid is 1:0.3. The frequency of the ultrasonic treatment in step 1 is 1.4 MHz.

[0061] In a preferred embodiment, the added amount of the nano titanium dioxide particles is 0.5 of the mass of the carbon nanotubes, and the drying temperature in step 1 is 70°C.

[0062] In a preferred embodiment, the vacuum drying temperature in step 2 is 90° C. and the drying time is 9 hours, and the high temperature expansion temperature in step 2 is 900° C. and the expansion time is 30 seconds.

[0063] In a preferred embodiment, the mass ratio of expanded graphite powder, paraffin wax and modified carbon nanotubes in step 2 is 1:9 and 0.1, and the temperature during vacuum heating in step 2 is 45°C.

[0064] In a preferred embodiment, the coating material in step 3 is a mixture of gelatin and gum arabic, and the mass ratio of the gelatin to gum arabic is 1:1, the mass ratio of the phase change material core, the coating material and water in step 3 is 1:1.4:1.2, the curing agent is diethylenetriamine, and the condensation reaction is stirred at a stirring speed of 1500 rpm and a reaction temperature of 22°C.

[0065] In a preferred embodiment, in the step 4, the mass ratio of the polyethylene slices, the carbon fiber slices and the phase change energy storage microcapsules is 100:70:1.

[0066] In a preferred embodiment, in step five, the temperature of the first roller is 152°C, and the temperature of the second roller is 162°C.

[0067] Application of phase change temperature regulating functional non-woven floss, the phase change temperature regulating functional non-woven floss is used for clothing textiles.

[0068] Comparative Example:

[0069] The present invention provides a method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet, comprising the following steps:

[0070] Step 1: Preparation of phase-change energy storage microcapsules: emulsifying, dispersing and condensing paraffin, coating materials and water, and adding a curing agent to perform a cross-linking reaction to obtain phase-change energy storage microcapsules after the reaction is completed;

[0071] Step 2: Preparation of phase change thermostatic fiber: Phase change energy storage microcapsules and polyethylene slices are stirred at 550 rpm and 45° C. for 35 min to obtain a premix, and the premix is ​​added to a melt spinning screw extruder to form a phase change thermostatic fiber;

[0072] Step 3: Preparation of non-woven flakes: combing the phase change temperature regulating fibers into a web, and hot-rolling the webs with a first roller and a second roller to obtain a phase change temperature regulating functional non-woven flakes.

[0073] In a preferred embodiment, the coating material in step one is a mixture of gelatin and gum arabic, and the mass ratio of the gelatin to gum arabic is 1:1, the mass ratio of paraffin, coating material and water in step one is 1:1.4:1.2, the curing agent is diethylenetriamine, and the condensation reaction is stirred at a stirring speed of 1500 rpm and a reaction temperature of 22°C.

[0074] In a preferred embodiment, in step three, the temperature of the first roller is 152°C, and the temperature of the second roller is 162°C.

[0075] Application of phase change temperature regulating functional non-woven floss, the phase change temperature regulating functional non-woven floss is used for clothing textiles.

[0076] The clothing textiles prepared in the above Examples 1-3 were respectively taken as Experimental Group 1, Experimental Group 2 and Experimental Group 3, and the textiles produced in the comparative example were taken as the control group, and the temperature regulation performance of the selected textiles was tested.

[0077] The enthalpy value of the fabric is tested in accordance with "GBT19466.3-2004 Differential Scanning Calorimetry (DSC) Part 3: Determination of Melting and Crystallization Temperature and Heat" in J / g;

[0078] The thermal insulation rate (%) of textiles is tested in accordance with GB / T11048-1989 “Test method for thermal insulation performance of textiles”.

[0079] The test results are shown in Table 1:

[0080] Melting enthalpy Crystallization enthalpy Warmth rate Experimental Group 1 28.7 29.2 48.3 Experimental Group 2 26.3 26.8 45.9 Experimental Group 3 23.8 24.5 41.4 Control group 12.6 13.1 32.6

[0081] Table 1

[0082] It can be seen from Table 1 that the clothing textiles produced by the present invention have good temperature regulating effect and warmth retention rate. Example 2 adds ordinary carbon nanotubes, and its temperature regulating effect is slightly reduced compared with Example 1; Example 3 adds ordinary carbon fibers, and its temperature regulating effect and warmth retention rate are significantly reduced compared with Example 1. Therefore, expanded graphite powder is mixed with paraffin. After the graphite powder expands, a large number of wrinkles and flaky structures will be generated on the surface, which increases the surface area of ​​the graphite powder. Then, it is mixed with paraffin by vacuum heating, so that the paraffin can be adsorbed on the expanded graphite powder. Then, modified carbon nanotubes are added to increase the thermal conductivity of the core of the phase change material, thereby improving the intelligent temperature control effect of the core of the phase change material. The carbon nanotubes are coated with aminated nano-titanium dioxide particles, which not only improves the dispersibility of the carbon nanotubes and the thermal conductivity of the core of the phase change material, but also the nano-titanium dioxide particles themselves have a certain temperature control effect, so the temperature control effect of the non-woven flakes is better. Graphene oxide / carbon fiber slices are added to reduce the use of polyethylene slices, and the carbon fiber has a better thermal conductivity. In addition, graphene oxide is loaded on the carbon fiber slices. Graphene oxide is a phase change temperature control material, which makes the non-woven flakes have a better intelligent temperature control effect.

[0083] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet, characterized in that: The following steps are involved: Step 1: Treatment of carbon nanotubes: dispersing carbon nanotubes in a strong acid solution, ultrasonically treating to obtain a dispersion, adding aminated nano-titanium dioxide particles to the dispersion, ultrasonically treating at 55-62° C. for 10-20 min, and then filtering and drying to obtain modified carbon nanotubes; Step 2: Preparation of the phase change material core, weighing graphite powder and placing it in a vacuum drying oven for drying treatment, and then performing high-temperature expansion to obtain expanded graphite powder after the drying treatment is completed. The expanded graphite powder is mixed with paraffin and then subjected to vacuum heating treatment, and then cooled to room temperature, and the modified carbon nanotubes obtained in step 1 are added and stirred to mix uniformly to obtain the phase change material core; Step 3: Preparation of phase change energy storage microcapsules, emulsification, dispersion and condensation reaction of the phase change material core, coating material and water, after the reaction is completed, adding a curing agent for cross-linking reaction to obtain phase change energy storage microcapsules; Step 4: Preparation of phase change thermostatic fiber: mixing phase change energy storage microcapsules with polyethylene slices and graphene oxide / carbon fiber slices, stirring at 500-600 rpm and 40-50° C. for 30-40 min to obtain a premix, and adding the premix to a melt spinning screw extruder to form a phase change thermostatic fiber; Step 5: Preparation of non-woven flakes: combing the phase-change temperature-regulating fibers into a web, and hot-rolling the webs with a first roller and a second roller to obtain a phase-change temperature-regulating functional non-woven flakes.

2. The method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet according to claim 1, characterized in that: The strong acid solution in step 1 is a mixture of concentrated sulfuric acid and concentrated nitric acid, and the volume ratio of the concentrated sulfuric acid to the concentrated nitric acid is 1:(0.2-0.5). The frequency of the ultrasonic treatment in step 1 is 1.2-1.6 MHz.

3. The method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet according to claim 2, characterized in that: The amount of the nano titanium dioxide particles added is 0.3-0.6 of the mass of the carbon nanotubes, and the drying temperature in step 1 is 60-80°C.

4. The method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet according to claim 1, characterized in that: The temperature during vacuum drying in step 2 is 80-100° C., and the drying time is 8-10 hours. The temperature during high-temperature expansion in step 2 is 850-950° C., and the expansion time is 20-40 seconds.

5. The method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet according to claim 1, characterized in that: In the step 2, the mass ratio of expanded graphite powder, paraffin wax and modified carbon nanotubes is 1: (6-10), (0.05-0.15), and the temperature during vacuum heating in the step 2 is 40-50°C.

6. The method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet according to claim 1, characterized in that: In the step three, the coating material is a mixture of gelatin and gum arabic, and the mass ratio of the gelatin to gum arabic is 1:

1. In the step three, the mass ratio of the phase change material core, the coating material and water is 1:(1.2-1.6):(1-1.5). The curing agent is diethylenetriamine. The condensation reaction is stirred at a speed of 1300-1600 rpm and a reaction temperature of 18-25°C.

7. The method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet according to claim 1, characterized in that: The preparation method of the graphene oxide / carbon fiber slice in the step 4 is as follows: cut the carbon fiber and put it into acetone for reflux and then take it out and dry it, soak the dried carbon fiber in concentrated nitric acid, ultrasonically treat it at 55-65°C for 3-4h, then rinse and dry it to obtain oxidized carbon fiber, add silane coupling agent and graphene oxide to the oxidized carbon fiber, stir and mix well, and then vacuum dry it to obtain graphene oxide / carbon fiber slice.

8. The method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet according to claim 7, characterized in that: The mass ratio of the oxidized carbon fiber, graphene oxide and silane coupling agent is 1:(0.5-0.8):(0.08-0.15), and the mass ratio of the polyethylene slice, graphene oxide / carbon fiber slice and phase change energy storage microcapsule in step 4 is 100:(60-80):(0.5-1.5).

9. The method for preparing a phase-change temperature-regulating functional nonwoven flocculent sheet according to claim 1, characterized in that: In the step 5, the temperature of the first roller is 150-155°C, and the temperature of the second roller is 160-165°C.

10. Application of the phase-change temperature-regulating nonwoven flocculent sheet prepared by the method according to any one of claims 1 to 9, characterized in that: The phase-change temperature-regulating functional nonwoven floss sheet is used for clothing textiles.