Preparation method of deodorizing anion graphene quantum dot cloud velvet

Abstract

The invention discloses a preparation method of deodorizing anion graphene quantum dot cloud wool, and relates to the technical field of cloud wool. Hydroxytyrosol 3-sodium sulfate and ammonium sebacate participate in a polyester polymerization reaction to prepare elastic polyester particles, so that the deformation resistance of the cloud wool is improved; meanwhile, sulfate radicals have antistatic and antibacterial effects; amino groups can be mutually neutralized with peculiar smell substances, so that the deodorization effect is achieved; and finally, by taking the polyester chips as a core layer and taking the elastic polyester particles, the dopamine modified graphene quantum dots and the modified antibacterial agent as a skin layer, performing melt spinning to prepare the deodorizing anion dopamine modified graphene quantum dot cloud wool, so as to realize antibacterial, deodorizing and antistatic effects. According to the modified antibacterial agent, 1, 6-dibromo isoquinoline-3-amine and N, N, N ', N'-tetramethyl-2-butene-1, 4-diamine are utilized to form a biquaternary ammonium salt structure, the antibacterial effect of the cloud velvet is improved, elastic polyester particles are assisted, the deodorization effect is improved, finally, tea polyphenol is added in the melt spinning process, a three-dimensional structure is formed, the protective capacity of the skin layer is improved, and the antibacterial effect of the cloud velvet is improved. And the non-deformability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cloud velvet, and in particular to a method for preparing deodorizing negative ion graphene quantum dot cloud velvet. Background Art

[0002] With the progress of society and the affluence of the people, people have higher and higher requirements for the functionality of textiles, and functional cloud velvet has attracted more and more attention and popularity. Cloud velvet is a velvet fabric made of polyester cloud velvet. This cloud velvet is hygroscopic and breathable, and is also relatively soft and comfortable. However, the surface of ordinary cloud velvet is prone to breeding various bacteria. It comes into contact with the skin during use, and the secretions produced by the human body provide nutrients for their growth and reproduction. When cloud velvet has bactericidal and antibacterial functions, it can prevent diseases caused by bacterial infections to a certain extent. At the same time, the antibacterial property can also protect the cloud velvet from bacterial erosion during use, and to a certain extent, it can extend the service life of the cloud velvet. Antibacterial treatment of cloud velvet has become an irresistible trend in the development of textiles in today's society.

[0003] Although antibacterial cloud velvet can reduce the reproduction of microorganisms and reduce the odor caused by microorganisms, in addition to bacteria and other microorganisms, there are many gases in our lives that make us unhappy. For example, the smell of cooking fumes in the kitchen, the smell of tobacco on people who smoke frequently, and harmful gases such as ammonia, benzene, and formaldehyde in interior decoration and daily chemical products. These gas odor molecules easily adhere to clothing and are difficult to disappear in a short period of time, causing poisoning to the human body. Therefore, it is very necessary to modify the cloud velvet to have antibacterial properties while also giving it a deodorizing function. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for preparing deodorizing negative ion graphene quantum dot cloud velvet to solve the problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention provides the following technical solution: a method for preparing deodorizing negative ion graphene quantum dot cloud velvet, comprising the following preparation steps: (1) Under a nitrogen atmosphere, 10-14 parts of ammonium sebacate, 8-12 parts of p-dibenzoic acid, 10-16 parts of ethylene glycol, and 0.002-0.004 parts of phosphorous acid were mixed uniformly, heated to 175-185°C, stirred at 70 rpm, and reacted for 1.5-3.5 hours. 0.04-0.05 parts of tetrabutyl titanate were added, and the temperature was continued to be raised to 210-220°C. The ambient pressure was maintained at 4-6 kPa, and the reaction was continued for 1-3 hours. The pressure was reduced and stirred at 70 rpm to 120 rpm, and the reaction was continued for 5-9 hours. The mixture was cooled to room temperature, and the solid was collected, washed with deionized water three times, and dried in an oven at 40-50°C for 10-16 hours to obtain an elastic polyester. (2) adding 90-120 parts of elastic polyester, 0.4-0.6 parts of antioxidant, and 3-5 parts of lubricant into a mixer and mixing at 245-265° C. for 25-45 minutes, putting the mixture into a mixing extruder, extruding the mixture, and pelletizing the mixture to obtain elastic polyester pellets; (3) 10-20 parts of N,N,N',N'-tetramethyl-2-butene-1,4-diamine, 5-9 parts of 1,6-dibromoisoquinolin-3-amine, and 120-230 parts of acetone were mixed uniformly, and the mixture was stirred at 50°C and 80 rpm for 4 h to obtain a reaction solution, which was purified to obtain a precursor powder; (4) 78-96 parts of elastic polyester particles, 8-10 parts of dopamine-modified graphene quantum dots, 12-16 parts of precursor powder, 0.6-0.8 parts of tea polyphenols, 5-9 parts of sodium carbonate, and 2-4 parts of tourmaline negative ion powder were mixed evenly to form the skin layer, and 54-66 parts of polyester chips were used as the core layer. The mixture was melted at different temperatures and sprayed out in filament form at a nozzle pressure of 0.2-0.6 MPa. The mixture was cooled and cut to obtain deodorizing negative ion dopamine-modified graphene quantum dot cloud velvet.

[0006] Furthermore, the pressure after decompression in step (1) is 400-500 Pa.

[0007] Furthermore, the antioxidant in step (2) is any one of BHT, AO-1, ​​and AO-3.

[0008] Furthermore, the lubricant in step (2) is any one of silicone oil, paraffin, and stearic acid.

[0009] Furthermore, the parameters of the mixing extruder in step (2) are: head temperature 225~235℃, screw speed 220~250r / min, extrusion pressure 25~35MPa, shear rate 240~270s -1 .

[0010] Furthermore, the purification step in step (3) is as follows: concentrating the reaction solution at a vacuum degree of -0.06 MPa and 30°C for 2-4 hours, adding 15 times the volume of n-hexane of the reaction solution under stirring at 140 rpm, removing the upper suspension, repeating 3 times, collecting the bottom solid, washing it with n-hexane twice, and drying it in an oven at 35-45°C for 10-16 hours.

[0011] Furthermore, the different temperatures in step (4) are: the skin layer spinning screw temperature is 265~285℃, and the core layer spinning screw temperature is 235~255℃.

[0012] Furthermore, the model of the polyester chips in step (4) is any one of FG600, CB-608S, and FC510A.

[0013] Furthermore, the cooling conditions in step (4) are: cooling air temperature 16~20°C, wind speed 0.8~1.6m / s, wind pressure 550~750Pa, and cooling time 15~25min.

[0014] Furthermore, the dopamine-modified graphene quantum dots in step (4) are prepared with reference to CN202180004656.9.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention prepares elastic polyester particles through the polymerization reaction of polyethylene terephthalate with ammonium sebacic acid, forms an odd-even segment structure, weakens and destroys the crystallization of the copolyester, reduces the intermolecular interaction force, thereby improving the flexibility and tensile strength of the material, and further improving the deformation resistance of the cloud velvet; at the same time, the amino group introduced by ammonium sebacic acid can be neutralized with the acidic components in the odorous substances to form a neutral substance, thereby reducing the intensity of the odor and achieving the deodorizing effect; finally, the polyester slice core layer, elastic polyester particles, dopamine-modified graphene quantum dots, and modified antibacterial agent are used as the skin layer, and the deodorizing negative ion dopamine-modified graphene quantum dot cloud velvet is obtained by melt spinning to achieve the antibacterial, deodorizing and antistatic effects.

[0016] Among them, the modified antibacterial agent is made from N,N,N',N'-tetramethyl-2-butene-1,4-diamine, 1,6-dibromoisoquinolin-3-amine, and tea polyphenols; the bromine group of 1,6-dibromoisoquinolin-3-amine is combined with the nitrogen atom in N,N,N',N'-tetramethyl-2-butene-1,4-diamine to form a diquaternary ammonium salt structure, which can improve the antibacterial effect of cloud velvet. At the same time, the presence of polar group amino and alkenyl can jointly enhance the bonding strength between cloud velvet and antibacterial agent, indirectly improve the deformation resistance, and assist elastic polyester particles to enhance the deodorization effect. Finally, tea polyphenols are added in the melt spinning process, and its hydroxyl groups are hydrogen-bonded with the modified antibacterial agent and elastic polyester particles to form a three-dimensional structure, thereby enhancing the protective ability of the cortex, so that the cloud velvet can disperse stress when subjected to external force, thereby improving its deformation resistance. In addition, tea polyphenols can cooperate with the modified antibacterial agent to further enhance the antibacterial effect of cloud velvet. DETAILED DESCRIPTION

[0017] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0018] In order to more clearly illustrate the method provided by the present application, the following examples are used to illustrate the method in detail. In the following examples, the test methods for each index of the deodorizing anion dopamine modified graphene quantum dot cloud wool are as follows: Tensile strength: the same weight of examples and comparative examples was taken, and tensile test was carried out according to GB / T 16603-2017, and the tensile rate was 10 mm / min.

[0019] Bacteriostatic rate: the same weight of examples and comparative examples was taken, and the same specification of composite fiber non-woven fabric (400 g / m 2 ) was prepared by the same process (hot rolling process), and the test was carried out according to GB / T 20944.3.

[0020] Deodorizing performance test method: the same weight of examples and comparative examples was taken, and was respectively sprayed into a closed container with known odor (H2S, NH3) concentration C0, and was placed for 60 min, and then the odor (H2S, NH3) concentration C1 in the closed instrument was tested by detection instrument, and the odor removal rate (%) = (C0-C1) / C0 was calculated, wherein C0 was the initial concentration of odor (H2S, NH3) in the closed container, and C1 was the concentration of odor (H2S, NH3) in the closed container after adding the antibacterial and deodorizing functional fiber.

[0021] Surface resistivity: the same weight of examples and comparative examples was taken, and the same specification of composite fiber non-woven fabric (400 g / m 2 ) was prepared by the same process (hot rolling process), and the surface resistivity was tested by an antistatic resistance tester, and the test environment was 20℃ and 65% RH.

[0022] Example 1: (1) Under a nitrogen atmosphere, 10 parts of ammonium sebacate, 8 parts of p-diphenic acid, 10 parts of ethylene glycol, and 0.002 parts of phosphorous acid were mixed uniformly, heated to 175℃, and reacted for 1.5h under stirring at 70rpm. 0.04 parts of tetrabutyl titanate was added, and the temperature was continued to be raised to 210℃, and the environmental pressure was maintained at 4kPa, and the reaction was continued for 1h. The pressure was reduced to 400Pa, and the stirring speed was increased from 70rpm to 120rpm, and the reaction was continued for 5h. The temperature was cooled to room temperature, the solid was collected, washed with deionized water for 3 times, and placed in a 40℃ oven for drying for 10h, and the elastic polyester was prepared; (2) 90 parts of the elastic polyester, 0.4 parts of BHT antioxidant, and 3 parts of silicone oil were added into a mixer and mixed at 245℃ for 25min. The material head temperature was 225℃, the screw rotation speed was 220r / min, the extrusion pressure was 25MPa, and the shear rate was 240s -1 The extrusion was carried out, the particles were cut, and the elastic polyester particles were prepared. (3) 10 parts of N,N,N',N'-tetramethyl-2-butene-1,4-diamine, 5 parts of 1,6-dibromoisoquinolin-3-amine, and 120 parts of acetone were mixed evenly, and reacted at 50°C and 80 rpm for 4 h to obtain a reaction solution. The reaction solution was concentrated at a vacuum degree of -0.06 MPa and 30°C for 2 h. 15 times the volume of n-hexane of the reaction solution was added under stirring at 140 rpm, and the upper suspension was removed. This was repeated 3 times. The solid at the bottom was collected, washed twice with n-hexane, and dried in an oven at 35°C for 10 h to obtain a precursor powder. (4) 78 parts of elastic polyester particles, 8 parts of dopamine-modified graphene quantum dots, 12 parts of precursor powder, 0.6 parts of tea polyphenols, 5 parts of sodium carbonate, and 2 parts of tourmaline negative ion powder were mixed evenly to form the skin layer, and 54 parts of FG600 polyester chips were used as the core layer. The mixture was melt-spun and ejected in a filamentous form at a nozzle pressure of 0.2 MPa. The mixture was cooled for 15 minutes at a cooling air temperature of 16°C, a wind speed of 0.8 m / s, and a wind pressure of 550 Pa, and then cut to obtain deodorizing negative ion dopamine-modified graphene quantum dot cloud velvet.

[0023] Example 2: (1) Under a nitrogen atmosphere, 12 parts of ammonium sebacate, 10 parts of p-dibenzoic acid, 13 parts of ethylene glycol, and 0.003 parts of phosphorous acid were mixed uniformly, heated to 180°C, and stirred at 70 rpm for 2.5 hours. 0.045 parts of tetrabutyl titanate were added, and the temperature was further raised to 215°C. The ambient pressure was maintained at 5 kPa and the reaction was continued for 2 hours. The pressure was then reduced to 450 Pa and stirred at 70 rpm to 120 rpm. The reaction was continued for 7 hours. The mixture was cooled to room temperature, and the solid was collected, washed three times with deionized water, and dried in an oven at 45°C for 13 hours to obtain an elastic polyester. (2) 105 parts of elastic polyester, 0.5 parts of AO-1 antioxidant, and 4 parts of paraffin were added to a mixer and mixed at 255°C for 35 minutes. The mixture was then put into a mixing extruder with a head temperature of 230°C, a screw speed of 235 r / min, an extrusion pressure of 30 MPa, and a shear rate of 255 s -1 Extrusion and pelletizing to obtain elastic polyester pellets; (3) 15 parts of N,N,N',N'-tetramethyl-2-butene-1,4-diamine, 7 parts of 1,6-dibromoisoquinolin-3-amine, and 175 parts of acetone were mixed evenly, and reacted at 50°C and 80 rpm for 4 hours to obtain a reaction solution. The reaction solution was concentrated at a vacuum degree of -0.06 MPa and 30°C for 3 hours. 15 times the volume of n-hexane of the reaction solution was added under stirring at 140 rpm, and the upper suspension was removed. This was repeated 3 times. The solid at the bottom was collected, washed twice with n-hexane, and dried in an oven at 40°C for 13 hours to obtain a precursor powder. (4) 87 parts of elastic polyester particles, 9 parts of dopamine-modified graphene quantum dots, 14 parts of precursor powder, 0.7 parts of tea polyphenols, 7 parts of sodium carbonate, and 3 parts of tourmaline negative ion powder were mixed evenly to form the skin layer, and 60 parts of CB-608S polyester chips were used as the core layer. The mixture was melt-spun and ejected in a filamentous form at a nozzle pressure of 0.4 MPa. The mixture was cooled for 20 minutes at a cooling air temperature of 18°C, a wind speed of 1.2 m / s, and a wind pressure of 650 Pa, and then cut to obtain deodorizing negative ion dopamine-modified graphene quantum dot cloud velvet.

[0024] Example 3: (1) Under a nitrogen atmosphere, 14 parts of ammonium sebacate, 12 parts of p-dibenzoic acid, 16 parts of ethylene glycol, and 0.004 parts of phosphorous acid were mixed uniformly, heated to 185°C, and reacted for 3.5 hours with stirring at 70 rpm. 0.05 parts of tetrabutyl titanate were added, and the temperature was further raised to 220°C. The ambient pressure was maintained at 6 kPa, and the reaction was continued for 3 hours. The pressure was reduced to 500 Pa, and the mixture was stirred at 70 rpm to 120 rpm. The reaction was continued for 9 hours, and the mixture was cooled to room temperature. The solid was collected, washed three times with deionized water, and dried in an oven at 50°C for 16 hours to obtain an elastic polyester. (2) 120 parts of elastic polyester, 0.6 parts of AO-3 antioxidant, and 5 parts of stearic acid were added to a mixer and mixed at 265°C for 45 minutes. The mixture was then put into a mixing extruder with a head temperature of 235°C, a screw speed of 250 r / min, an extrusion pressure of 35 MPa, and a shear rate of 270 s -1 Extrusion and pelletizing to obtain elastic polyester pellets; (3) 20 parts of N,N,N',N'-tetramethyl-2-butene-1,4-diamine, 9 parts of 1,6-dibromoisoquinolin-3-amine, and 230 parts of acetone were mixed evenly, and reacted at 50°C and 80 rpm for 4 hours to obtain a reaction solution. The reaction solution was concentrated at a vacuum degree of -0.06 MPa and 30°C for 4 hours. 15 times the volume of n-hexane of the reaction solution was added under stirring at 140 rpm, and the upper suspension was removed. This was repeated 3 times. The solid at the bottom was collected, washed twice with n-hexane, and dried in an oven at 45°C for 16 hours to obtain a precursor powder. (4) 96 parts of elastic polyester particles, 10 parts of dopamine-modified graphene quantum dots, 16 parts of precursor powder, 0.8 parts of tea polyphenols, 9 parts of sodium carbonate, and 4 parts of tourmaline negative ion powder were mixed evenly as the skin layer, and 66 parts of FC510A polyester chips were used as the core layer. The mixture was melt-spun and ejected in a filamentous form at a nozzle pressure of 0.6 MPa. The mixture was cooled for 25 minutes at a cooling air temperature of 20°C, a wind speed of 1.6 m / s, and a wind pressure of 750 Pa, and then cut to obtain deodorizing negative ion dopamine-modified graphene quantum dot cloud velvet.

[0025] Comparative Example 1: The difference between Comparative Example 1 and Example 2 is that ammonium sebacate is not added in step (1). The remaining steps are the same as those in Example 2.

[0026] Comparative Example 2: The difference between Comparative Example 2 and Example 2 is that step (3) is omitted, and step (4) is changed to: 87 parts of elastic polyester particles, 9 parts of dopamine-modified graphene quantum dots, 14 parts of 1,6-dibromoisoquinolin-3-amine, 0.7 parts of tea polyphenols, 7 parts of sodium carbonate, and 3 parts of tourmaline negative ion powder are uniformly mixed to form the skin layer, and 60 parts of CB-608S polyester chips are used as the core layer. The mixture is melt-spun and ejected in a filamentous form at a nozzle pressure of 0.4 MPa. The mixture is cooled for 20 minutes at a cooling air temperature of 18°C, a wind speed of 1.2 m / s, and a wind pressure of 650 Pa, and then cut to obtain a deodorizing negative ion dopamine-modified graphene quantum dot cloud fleece. The remaining steps are the same as those in Example 2.

[0027] Comparative Example 3: The difference between Comparative Example 3 and Example 2 is that step (3) is omitted, and step (4) is changed to: 87 parts of elastic polyester particles, 9 parts of dopamine-modified graphene quantum dots, 14 parts of N,N,N',N'-tetramethyl-2-butene-1,4-diamine, 0.7 parts of tea polyphenols, 7 parts of sodium carbonate, and 3 parts of tourmaline negative ion powder are mixed uniformly as the skin layer, and 60 parts of CB-608S polyester chips are used as the core layer. The mixture is melt-spun and ejected in a filamentous form at a nozzle pressure of 0.4 MPa. The mixture is cooled for 20 minutes at a cooling air temperature of 18°C, a wind speed of 1.2 m / s, and a wind pressure of 650 Pa, and then cut to obtain a deodorizing negative ion dopamine-modified graphene quantum dot cloud fleece. The remaining steps are the same as those in Example 2.

[0028] Comparative Example 4: The difference between Comparative Example 4 and Example 2 lies in the difference in step (4). Step (4) is changed to: 87 parts of elastic polyester particles, 9 parts of dopamine-modified graphene quantum dots, 14 parts of precursor powder, and 3 parts of tourmaline negative ion powder are mixed uniformly as the skin layer, and 60 parts of CB-608S polyester chips are used as the core layer. The mixture is melt-spun and ejected in a filamentous form at a nozzle pressure of 0.4 MPa. The mixture is cooled for 20 minutes at a cooling air temperature of 18°C, a wind speed of 1.2 m / s, and a wind pressure of 650 Pa. The mixture is then cut to obtain a deodorizing negative ion dopamine-modified graphene quantum dot cloud fleece. The remaining steps are the same as those in Example 2.

[0029] Effect Examples Table 1 below shows the performance analysis results of the deodorizing negative ion dopamine-modified graphene quantum dot cloud fleece of Examples 1 to 3 of the present invention and Comparative Examples 1 to 4.

[0030] Table 1

[0031] From the comparison of the experimental data of Examples 1, 2, and 3 with those of Comparative Example 1, it can be found that the amino group introduced by sebacic acid amine can neutralize the acidic components in the odorous substances to form neutral substances, reduce the intensity of the odor, and achieve the effect of deodorization; from the comparison of the experimental data of Examples 1, 2, and 3 with those of Comparative Example 2, it can be found that the bromine group combines with the nitrogen atom in N, N, N', N'-tetramethyl-2-butene-1, 4-diamine to form a diquaternary ammonium salt structure, which can improve the antibacterial effect of cloud velvet. At the same time, the presence of the alkenyl group can jointly enhance the bonding strength between cloud velvet and the antibacterial agent and improve the tensile strength; from the comparison of the experimental data of Examples 1, 2, and 3 with those of Comparative Example 3, it can be found that the use of 1,6-dibromo Isoquinoline-3-amine combines with nitrogen atoms to form a diquaternary ammonium salt structure, which can improve the antibacterial effect of cloud velvet. At the same time, the presence of polar group amino can jointly enhance the bonding strength between cloud velvet and antibacterial agent, improve tensile strength, and assist elastic polyester particles to enhance the deodorization effect. Comparison of the experimental data of Examples 1, 2, 3 and Comparative Example 4 shows that, during the melt spinning process, tea polyphenols are added, and their hydroxyl groups are hydrogen-bonded with the modified antibacterial agent and elastic polyester particles to form a three-dimensional structure, thereby enhancing the protective ability of the cortex and enabling the cloud velvet to disperse stress when subjected to external force, thereby improving its tensile strength. In addition, tea polyphenols can cooperate with the modified antibacterial agent to enhance the antibacterial effect of cloud velvet.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for preparing deodorizing negative ion graphene quantum dot cloud velvet, characterized in that: The method comprises the following preparation steps: (1) Under a nitrogen atmosphere, 10-14 parts of ammonium sebacate, 8-12 parts of p-dibenzoic acid, 10-16 parts of ethylene glycol, and 0.002-0.004 parts of phosphorous acid were mixed uniformly, heated to 175-185°C, stirred at 70 rpm, and reacted for 1.5-3.5 hours. 0.04-0.05 parts of tetrabutyl titanate were added, and the temperature was continued to be raised to 210-220°C. The ambient pressure was maintained at 4-6 kPa, and the reaction was continued for 1-3 hours. The pressure was reduced and stirred at 70 rpm to 120 rpm, and the reaction was continued for 5-9 hours. The mixture was cooled to room temperature, and the solid was collected, washed with deionized water three times, and dried in an oven at 40-50°C for 10-16 hours to obtain an elastic polyester. (2) adding 90-120 parts of elastic polyester, 0.4-0.6 parts of antioxidant, and 3-5 parts of lubricant into a mixer and mixing at 245-265° C. for 25-45 minutes, putting the mixture into a mixing extruder, extruding the mixture, and pelletizing the mixture to obtain elastic polyester pellets; (3) 10-20 parts of N,N,N',N'-tetramethyl-2-butene-1,4-diamine, 5-9 parts of 1,6-dibromoisoquinolin-3-amine, and 120-230 parts of acetone were mixed uniformly, and the mixture was stirred at 50°C and 80 rpm for 4 h to obtain a reaction solution, which was purified to obtain a precursor powder; (4) 78-96 parts of elastic polyester particles, 8-10 parts of graphene quantum dots, 12-16 parts of precursor powder, 0.6-0.8 parts of tea polyphenols, 5-9 parts of sodium carbonate, and 2-4 parts of tourmaline negative ion powder were mixed evenly to form the skin layer, and 54-66 parts of polyester chips were used as the core layer. The mixture was melted at different temperatures and ejected in filament form at a nozzle pressure of 0.2-0.6 MPa. The mixture was cooled and cut to obtain graphene quantum dot cloud velvet.

2. The method for preparing a deodorizing negative ion graphene quantum dot cloud velvet according to claim 1, characterized in that: The pressure after decompression in step (1) is 400~500Pa.

3. The method for preparing a deodorizing negative ion graphene quantum dot cloud velvet according to claim 1, characterized in that: The antioxidant in step (2) is any one of BHT, AO-1, ​​and AO-3.

4. The method for preparing a deodorizing negative ion graphene quantum dot cloud velvet according to claim 1, characterized in that: The lubricant in step (2) is any one of silicone oil, paraffin, and stearic acid.

5. The method for preparing a deodorizing negative ion graphene quantum dot cloud velvet according to claim 1, characterized in that: The parameters of the mixing extruder in step (2) are: head temperature 225~235℃, screw speed 220~250r / min, extrusion pressure 25~35MPa, shear rate 240~270s -1 .

6. The method for preparing a deodorizing negative ion graphene quantum dot cloud velvet according to claim 1, characterized in that: The purification step in step (3) is as follows: the reaction solution is concentrated at a vacuum degree of -0.06 MPa and 30°C for 2 to 4 hours, 15 times the volume of n-hexane of the reaction solution is added under stirring at 140 rpm, the upper suspension is removed, and the process is repeated 3 times. The solid at the bottom is collected, washed twice with n-hexane, and dried in an oven at 35 to 45°C for 10 to 16 hours.

7. The method for preparing a deodorizing negative ion graphene quantum dot cloud velvet according to claim 1, characterized in that: The different temperatures in step (4) are: the skin layer spinning screw temperature is 265~285℃, and the core layer spinning screw temperature is 235~255℃.

8. The method for preparing a deodorizing negative ion graphene quantum dot cloud velvet according to claim 1, characterized in that: The model of the polyester chips in step (4) is any one of FG600, CB-608S, and FC510A.

9. The method for preparing a deodorizing negative ion graphene quantum dot cloud velvet according to claim 1, characterized in that: The cooling conditions in step (4) are: cooling air temperature 16~20°C, wind speed 0.8~1.6m / s, wind pressure 550~750Pa, and cooling time 15~25min.

10. The method for preparing a deodorizing negative ion graphene quantum dot cloud velvet according to claim 1, characterized in that: The graphene quantum dots in step (4) are specifically dopamine-modified graphene quantum dots.

11. The method for preparing deodorizing negative ion graphene quantum dot cloud velvet according to any one of claims 1 to 10, wherein the cloud velvet is prepared by melt-spinning the skin layer and the core layer as raw materials.

12. The deodorizing negative ion graphene quantum dot cloud velvet according to claim 11, characterized in that: The core layer material is polyester chips.

13. The deodorizing negative ion graphene quantum dot cloud velvet according to claim 11, characterized in that: The raw materials of the cortex include elastic polyester particles, dopamine-modified graphene quantum dots, precursor powder, tea polyphenols, sodium carbonate, and tourmaline negative ion powder.

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