Cashmere and graphene fiber blending process

Abstract

The invention discloses a cashmere and graphene fiber blending technology, and relates to a cashmere textile technology, the cashmere and graphene fiber blending technology comprises the following steps: S1, adding acrylic acid and cyclohexanone peroxide into ethanol to completely dissolve, and diluting by 10-20 times with distilled water to obtain a modifier; s2, soaking the graphene fibers in a modifier for 6-8 hours; s3, performing steam treatment to obtain modified graphene fibers; s4, the cashmere fibers are soaked in [BMIM] Cl; s5, taking a protease solution and a cellulase solution, and soaking the cashmere fibers to obtain modified cashmere fibers; s6, taking modified cashmere fibers and modified graphene fibers; s7, mixing and beating; s8, carding to obtain blend fibers; s9, spinning the blended fibers to obtain blended yarns; s10, performing steam treatment; the problems of non-uniform blending and infirm combination caused by surface property difference of the graphene fiber and the cashmere fiber are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cashmere textile, and particularly to a blending process of cashmere and graphene fiber. Background Art

[0002] As a precious natural animal fiber, cashmere has become an important raw material for high-end textiles due to its excellent softness, lightness, and warmth retention. However, cashmere fiber itself has obvious performance defects, including poor wrinkle resistance, low mechanical strength, easy pilling, and insufficient abrasion resistance, which severely limit its application in the field of high-end functional textiles.

[0003] In recent years, graphene fiber has provided a new idea for the functional upgrading of textile materials due to its excellent mechanical properties, outstanding thermal conductivity, and unique interfacial effect. Blending graphene fiber with cashmere can form complementary advantages, where cashmere provides comfort, and graphene enhances mechanical properties and endows new functions such as heat conduction and antibacterial properties.

[0004] However, in practical applications, 1. The surface of graphene fiber has strong inertness, and the polarity difference with cashmere leads to insufficient mixing uniformity, and fiber stratification is likely to occur during the spinning process; 2. Due to the significant difference in modulus between graphene fiber and cashmere fiber, it is difficult for traditional spinning processes to form a stable interfacial bond, and interfacial peeling is likely to occur during use; 3. Simple physical mixing will mask the conductive and thermal conductive properties of graphene, and the natural softness of cashmere may be damaged.

[0005] Therefore, developing a blending process that can retain the natural properties of cashmere, efficiently exert the functions of graphene, and have a firm interfacial bond has become a technical problem that the industry urgently needs to break through. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides a blending process of cashmere and graphene fiber, including the following steps: S1. Add acrylic acid, cyclohexanone peroxide, and silane coupling agent to ethanol for dissolution, and dilute with distilled water by 10 - 20 times to obtain a composite modifier; S2. Immerse graphene fiber in the composite modifier and treat it at 60 - 80 °C for 6 - 8 hours; S3. Perform steam treatment on the immersed graphene fiber for 30 - 50 minutes to obtain modified graphene fiber; Through the synergistic effect of the composite modifier, polar groups such as carboxyl and amino groups are introduced on the surface of graphene fiber, significantly reducing its surface inertness, narrowing the polarity difference with cashmere fiber, and making it easier to disperse uniformly during mixing. Steam treatment further activates the surface functional groups of the fiber, enhancing the hydrogen bond and van der Waals force with cashmere fiber, and avoiding stratification caused by density differences during the spinning process; The modulus gradient of the modified graphene fiber is more compatible with that of the cashmere fiber, reducing the risk of interfacial peeling during spinning and subsequent use. At the same time, the high-strength property of graphene is retained, significantly enhancing the tensile and abrasion resistance of the blended yarn. Moreover, through surface modification, graphene is prevented from being physically wrapped by the cashmere fiber, ensuring that its heat conduction channels and antibacterial sites are fully exposed, endowing the blended fabric with excellent thermal management performance and antibacterial effect. S4. Pretreat the cashmere fiber in the ionic liquid [BMIM]Cl for 10 - 15 minutes, and then soak it in a composite enzyme solution with a mass concentration of 0.1% - 0.3% for 10 - 20 minutes to obtain the modified cashmere fiber. The composite enzyme solution is composed of protease, cellulase, and laccase. Using the [BMIM]Cl ionic liquid to treat the cashmere fiber can gently open the scale layer on the fiber surface, increase the specific surface area without destroying its natural softness and warmth retention, and at the same time promote the penetration efficiency of enzyme treatment. The protease / cellulase synergistically degrades the redundant proteins and impurities on the surface of the cashmere, and the laccase further crosslinks the fiber surface layer, reducing the pilling tendency and improving the surface smoothness while retaining the fluffiness and touch of the cashmere. S5. Mix the modified cashmere fiber and the modified graphene fiber according to a mass ratio of 4 - 5:1, and after laying, mixing, carding, and spinning processes, obtain the blended yarn. S6. Perform low-temperature plasma treatment on the blended yarn in an inert gas atmosphere, with a power of 50 - 100W and a time of 2 - 5 minutes, and then perform steam treatment at 100 - 130°C for 20 - 30 minutes to obtain the finished product. The low-temperature plasma treatment further activates the surface of graphene, forming a more stable chemical bond with the cashmere fiber, while avoiding the destruction of the natural properties of the cashmere at high temperatures.

[0007] Further, in step S1, in the composite modifier, the mass ratio of acrylic acid: cyclohexanone peroxide: silane coupling agent is 18 - 22:0.5:0.1 - 0.3.

[0008] Further, in step S1, the silane coupling agent is γ-aminopropyltriethoxysilane (KH550) or γ-glycidoxypropyltrimethoxysilane (KH560).

[0009] Further, in step S3, the temperature of the steam during the steam treatment is 110 - 120°C.

[0010] Further, in step S4, the ionic liquid pretreatment is carried out under ultrasonic assistance, with an ultrasonic frequency of 40kHz and a power of 200 - 300W.

[0011] Furthermore, in step S4, in the composite enzyme solution, protease and cellulase are composed in a volume ratio of 1:1, and the added amount of laccase is 0.05%-0.1% of the total volume of protease and cellulase.

[0012] Furthermore, in step S4, the mass concentration of the ionic liquid [BMIM]Cl is 5%-10%.

[0013] Furthermore, in step S5, 3%-5% by mass of spandex fiber is also added to the blended yarn.

[0014] Furthermore, in step S5, the spun yarn is processed in a Z twist direction, with a twist of 580-620 T / M and a spindle speed of 6500-7000 rpm.

[0015] Furthermore, in step S6, the inert gas is nitrogen or argon.

[0016] The surface properties of cashmere fiber and graphene fiber are quite different, which makes it difficult to mix them evenly during the blending process, and the fiber agglomeration or uneven distribution is likely to occur. The two are also difficult to be firmly combined. The present invention modifies the graphene fiber and the cashmere fiber at the same time, so that the surface properties are closer, and the fibers can be evenly distributed during blending, thereby avoiding the problems of fiber agglomeration and uneven distribution. At the same time, the graphene fiber and the cashmere fiber are easier to combine, and the degree of their combination is improved, thereby improving their breaking strength and elongation at break; and after the modification, the graphene fiber and the blended yarn are steam-treated, and the high temperature and humidity conditions of the steam promote further reaction between the modifier and the fiber, and at the same time, through molecular diffusion and penetration, the bonding force between the fibers is enhanced; that is, the present invention modifies and steam-treats the graphene fiber and the cashmere fiber, so that the molecular interaction between the graphene fiber and the cashmere fiber is enhanced, a tighter combination is formed, the physical fastness of the cashmere fiber is improved, the defect that the cashmere and graphene fibers are difficult to form a firm combination during the blending process is solved, and its durability is significantly improved.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention modifies graphene fiber and cashmere fiber at the same time. Aiming at the surface inertness of graphene fiber and the difference in polarity with cashmere, a composite modifier composed of acrylic acid, cyclohexanone peroxide and silane coupling agent is used for chemical modification, and steam treatment is combined to enhance its surface activity. The cashmere fiber is pretreated with ionic liquid and synergistically treated with composite enzymes (protease, cellulase, laccase), which effectively improves the interface compatibility of the two fibers and solves the problems of insufficient mixing uniformity and spinning stratification.

[0018] 2. The present invention modifies graphene fibers and cashmere fibers simultaneously. By double-fiber modification, the interfacial bonding force between graphene and cashmere is significantly improved. Combining low-temperature plasma treatment and steam setting after blending, a stable inter-fiber interaction network is formed, which not only retains the natural softness and warmth retention of cashmere but also fully exerts the mechanical strengthening, heat conduction, and antibacterial functions of graphene, achieving complementary performance advantages.

[0019] 3. In the present invention, through the synergistic effect of a composite modifier, polar groups such as carboxyl and amino groups are introduced onto the surface of graphene fibers, significantly reducing their surface inertness, narrowing the polar difference with cashmere fibers, and making them more easily and evenly dispersed during mixing. Steam treatment further activates the surface functional groups of the fibers, enhancing the hydrogen bond and van der Waals force interactions with cashmere fibers, and avoiding the layering phenomenon caused by density differences during the spinning process. Moreover, the modulus gradient of the modified graphene fibers is more compatible with that of cashmere fibers, reducing the risk of interfacial peeling during spinning and subsequent use, while retaining the high-strength characteristics of graphene, significantly improving the tensile and abrasion resistance of the blended yarn. Additionally, through surface modification, graphene is prevented from being physically wrapped by cashmere fibers, ensuring that its heat conduction channels and antibacterial sites are fully exposed, enabling the blended fabric to have excellent thermal management performance and antibacterial effects.

[0020] 4. In the present invention, [BMIM]Cl ionic liquid is used to treat cashmere fibers under ultrasonic assistance, which can gently open the surface scale layer of the fibers, increase the specific surface area without damaging their natural softness and warmth retention, and at the same time promote the penetration efficiency of enzyme treatment. Protease / cellulase synergistically degrades the redundant proteins and impurities on the surface of cashmere, and laccase further crosslinks the fiber surface layer, reducing the pilling tendency and improving the surface smoothness, while retaining the fluffiness and touch of cashmere. Detailed implementation mode

[0021] Example 1 A blending process for cashmere and graphene fibers comprises the following steps: S1. Add acrylic acid, cyclohexanone peroxide, and silane coupling agent into ethanol for dissolution, and dilute it 10 times with distilled water to obtain a composite modifier; S2. Immerse the graphene fibers in the composite modifier and treat them at 60 °C for 6 hours; S3. Conduct steam treatment on the immersed graphene fibers for 30 minutes to obtain modified graphene fibers; S4. Place the cashmere fibers in the ionic liquid [BMIM]Cl for pretreatment for 10 minutes, and then immerse them in a composite enzyme solution with a mass concentration of 0.1% for 10 minutes to obtain modified cashmere fibers; the composite enzyme solution is composed of protease, cellulase, and laccase; S5. Mix the modified cashmere fiber and the modified graphene fiber in a mass ratio of 4:1. After laying, mixing, carding, and spinning processes, a blended yarn is obtained. S6. Perform low-temperature plasma treatment on the blended yarn in an inert gas atmosphere at a power of 50 W for 2 minutes, and then perform steam treatment at 100 °C for 20 minutes to obtain the finished product.

[0022] Preferably, in step S1, in the composite modifier, the mass ratio of acrylic acid: cyclohexanone peroxide: silane coupling agent is 18:0.5:0.1.

[0023] Preferably, in step S1, the silane coupling agent is γ-aminopropyltriethoxysilane (KH550).

[0024] Preferably, in step S3, the temperature of the steam during the steam treatment is 110 °C.

[0025] Preferably, in step S4, the ionic liquid pretreatment is carried out under ultrasonic assistance, with an ultrasonic frequency of 40 kHz and a power of 200 W.

[0026] Preferably, in step S4, in the composite enzyme solution, protease and cellulase are composed in a volume ratio of 1:1, and the addition amount of laccase is 0.05% of the total volume of protease and cellulase.

[0027] Preferably, in step S4, the mass concentration of the ionic liquid [BMIM]Cl is 5%.

[0028] Preferably, in step S5, 3% by mass of spandex fiber is also incorporated into the blended yarn.

[0029] Preferably, in step S5, the Z-twist direction is adopted during the spinning process, with a twist of 580 T / M and a spindle speed of 6500 rpm.

[0030] Preferably, in step S6, the inert gas is nitrogen.

[0031] Example 2 A blending process for cashmere and graphene fiber, comprising the following steps: S1. Add acrylic acid, cyclohexanone peroxide, and silane coupling agent to ethanol for dissolution, and dilute 20 times with distilled water to obtain a composite modifier. S2. Immerse the graphene fiber in the composite modifier and treat it at 80 °C for 8 hours. S3. Perform steam treatment on the immersed graphene fiber for 50 minutes to obtain modified graphene fiber. S4. Place the cashmere fibers in the ionic liquid [BMIM]Cl for 15 minutes of pretreatment, and then soak them in a composite enzyme solution with a mass concentration of 0.3% for 20 minutes to obtain modified cashmere fibers; the composite enzyme solution is composed of protease, cellulase and laccase; S5. Mix the modified cashmere fibers and the modified graphene fibers according to a mass ratio of 5:1, and after laying, mixing, carding and spinning processes, obtain a blended yarn; S6. Carry out low-temperature plasma treatment on the blended yarn in an inert gas atmosphere, with a power of 100 W and a time of 5 minutes, and then carry out steam treatment at 130 °C for 30 minutes to obtain the finished product.

[0032] Preferably, in step S1, in the composite modifier, the mass ratio of acrylic acid: cyclohexanone peroxide: silane coupling agent is 22:0.5:0.3.

[0033] Preferably, in step S1, the silane coupling agent is γ-aminopropyltriethoxysilane (KH550) or γ-glycidoxypropyltrimethoxysilane (KH560).

[0034] Preferably, in step S3, the temperature of the steam during the steam treatment is 120 °C.

[0035] Preferably, in step S4, the ionic liquid pretreatment is carried out under ultrasonic assistance, with an ultrasonic frequency of 40 kHz and a power of 300 W.

[0036] Preferably, in step S4, in the composite enzyme solution, protease and cellulase are composed according to a volume ratio of 1:1, and the addition amount of laccase is 0.1% of the total volume of protease and cellulase.

[0037] Preferably, in step S4, the mass concentration of the ionic liquid [BMIM]Cl is 10%.

[0038] Preferably, in step S5, 5% by mass of spandex fibers are also incorporated into the blended yarn.

[0039] Preferably, in step S5, the Z-twist direction is adopted during the spinning process, with a twist of 620 T / M and a spindle speed of 7000 rpm.

[0040] Preferably, in step S6, the inert gas is argon.

[0041] Example 3 A blending process for cashmere and graphene fibers, comprising the following steps: S1. Add acrylic acid, cyclohexanone peroxide and silane coupling agent to ethanol for dissolution, and dilute it 15 times with distilled water to obtain a composite modifier; S2. Immerse the graphene fiber in the composite modifier and treat it at 70 °C for 7 hours; S3. Steam-treat the immersed graphene fiber for 40 minutes to obtain the modified graphene fiber; S4. Place the cashmere fiber in the ionic liquid [BMIM]Cl for pretreatment for 12 minutes, and then immerse it in a composite enzyme solution with a mass concentration of 0.2% for 15 minutes to obtain the modified cashmere fiber; the composite enzyme solution is composed of protease, cellulase and laccase; S5. Mix the modified cashmere fiber and the modified graphene fiber according to a mass ratio of 4.5:1, and after laying, mixing, carding and spinning processes, obtain the blended yarn; S6. Perform low-temperature plasma treatment on the blended yarn in an inert gas atmosphere, with a power of 80 W and a time of 3 minutes, and then steam-treat it at 110 °C for 25 minutes to obtain the finished product.

[0042] Preferably, in step S1, in the composite modifier, the mass ratio of acrylic acid: cyclohexanone peroxide: silane coupling agent is 20:0.5:0.2.

[0043] Preferably, in step S1, the silane coupling agent is γ-aminopropyltriethoxysilane (KH550) or γ-glycidoxypropyltrimethoxysilane (KH560).

[0044] Preferably, in step S3, the temperature of the steam during the steam treatment is 115 °C.

[0045] Preferably, in step S4, the ionic liquid pretreatment is carried out under ultrasonic assistance, with an ultrasonic frequency of 40 kHz and a power of 250 W.

[0046] Preferably, in step S4, in the composite enzyme solution, protease and cellulase are composed according to a volume ratio of 1:1, and the addition amount of laccase is 0.08% of the total volume of protease and cellulase.

[0047] Preferably, in step S4, the mass concentration of the ionic liquid [BMIM]Cl is 8%.

[0048] Preferably, in step S5, 4% by mass of spandex fiber is also incorporated into the blended yarn.

[0049] Preferably, in step S5, during the spinning process, the Z twist direction is adopted, the twist multiple is 600 T / M, and the spindle speed is 6800 rpm.

[0050] Preferably, in step S6, the inert gas is nitrogen.

[0051] Comparative Example 1 The difference between this comparative example and Example 3 is that unmodified graphene fibers and modified cashmere fibers are blended, and the remaining steps are the same as those in Example 3.

[0052] Comparative Example 2 The difference between this comparative example and Example 3 is that unmodified cashmere fibers and modified graphene fibers are blended, and the remaining steps are the same as those in Example 3.

[0053] Comparative Example 3 The difference between this comparative example and Example 3 is that in step S6, steam treatment is not carried out, and the remaining steps are the same as those in Example 3.

[0054] Comparative Example 4 The difference between this comparative example and Example 3 is that in the composite modifier in step S1, the mass ratio of acrylic acid: cyclohexanone peroxide: silane coupling agent is 10: 0.5: 0.2.

[0055] Comparative Example 5 The difference between this comparative example and Example 3 is that when the graphene fibers are modified, the modifiers are acrylic acid and cyclohexanone peroxide, and the mass ratio is 30: 0.5: 0.2.

[0056] Comparative Example 6 The difference between this comparative example and Example 3 is that in step S4, pretreatment with ionic liquid [BMIM] Cl is not used.

[0057] Comparative Example 7 The difference between this comparative example and Example 3 is that in step S4, treatment with a composite enzyme solution is not used.

[0058] Experimental part

[0059] Experiment 1 Tensile resistance performance test Respectively take 5 samples of the blended yarns of cashmere and graphene fibers prepared in Examples 1, 2, 3, and Comparative Examples 1, 2, 3, 4, 5, 6, 7, with a length of 50 cm.

[0060] Experimental instruments: Electronic universal material testing machine, standard environmental temperature and humidity control box (temperature 20 ± 2 °C, relative humidity 65 ± 2%).

[0061] After placing the yarn samples in the standard environmental temperature and humidity control box for 24 hours of equilibration, fix the specimens on the fixture of the electronic universal material testing machine, with a fixture spacing of 20 cm, and conduct tensile testing at a tensile speed of 100 mm / min until the specimens break, record the maximum force value (N) at break, and calculate the elongation at break (%), and the results are shown in Table 1.

[0062] Table 1 Tensile resistance performance test results

[0063] As can be seen from Table 1, the breaking strength and elongation at break of Examples 1-3 are significantly higher than those of Comparative Examples 1-7, indicating that the modified treatment and steam treatment of the present invention effectively improve the tensile properties of the blended yarn.

[0064] In Comparative Example 1, the graphene fiber was not modified, and in Comparative Example 2, the cashmere fiber was not modified, resulting in lower breaking strength and elongation at break, indicating that the modification treatment is crucial for optimizing the surface properties of graphene fiber and cashmere fiber; in Comparative Example 3, steam treatment was not carried out, and the breaking strength and elongation at break were lower than those of Example 3, indicating that steam treatment can further enhance the bonding force between the fiber and cashmere; in Comparative Examples 4 and 5, due to improper use of the modifier ratio, the breaking strength and elongation at break were also lower, indicating that when modifying graphene fiber with the modifier of the present invention, in addition to the selection of the modifier drug, its ratio is also equally important. In the present invention, when the mass ratio of acrylic acid: cyclohexanone peroxide: silane coupling agent is 18-22: 0.5: 0.1-0.3, the effect is optimal; in Comparative Example 6, ionic liquid [BMIM]Cl was not used to pretreat cashmere, and in Comparative Example 7, composite enzyme solution was not used to treat cashmere, resulting in lower breaking strength and elongation at break, indicating that [BMIM]Cl and enzyme treatment play an important role in the modification of cashmere fiber.

[0065] There are significant differences in the surface properties between cashmere fiber and graphene fiber, resulting in difficulty in uniform mixing during the blending process, and easy occurrence of fiber agglomeration or uneven distribution. It is also difficult for the two to be firmly combined; after the present invention simultaneously modifies graphene fiber and cashmere fiber, the surface properties of the two fibers tend to be the same, and they can be evenly distributed during blending, avoiding the problems of fiber agglomeration and uneven distribution. It makes it easier for graphene fiber and cashmere fiber to combine, improves the bonding firmness, and thus increases their breaking strength and elongation at break. At the same time, after the modification treatment, steam treatment is carried out on graphene fiber and blended yarn. The high temperature and humidity conditions of steam promote the further reaction between the modifier and the fiber, and at the same time, through molecular diffusion and penetration, the bonding force between the fibers is enhanced.

[0066] Experiment 2 Wear Resistance Test Use the same samples as in Experiment 1 for the experiment.

[0067] Experimental equipment: Martindale wear tester, standard environmental temperature and humidity control box (temperature 20±2°C, relative humidity 65±2%).

[0068] Using a Martindale abrasion tester, the test was carried out according to the test method of GB / T 21196.2-2007 standard: fix the fabric sample on the tester, apply a pressure of 12 kPa, use a wool felt to rub the fabric, record the number of rubbing times when obvious wear or breakage appears on the fabric surface, test each group of specimens 5 times, and take the average value as the final result as shown in Table 2.

[0069] Table 2 Abrasion resistance test results

[0070] It can be seen from Table 2 that the abrasion resistance times of Examples 1-3 are significantly higher than those of Comparative Examples 1-7, indicating that after the modification treatment and steam treatment of graphene fibers and cashmere fibers, the abrasion resistance of the blended yarn is effectively improved; this may be because the surface properties of cashmere fibers and graphene fibers are quite different, resulting in difficult uniform mixing during the blending process, and the interfacial bonding is not firm, which is easy to cause fiber shedding or peeling during use, thus affecting the abrasion resistance; at the same time, the high temperature and humidity conditions of steam promote the further reaction between the modifier and the fibers, and at the same time, through molecular diffusion and penetration, the bonding force between the fibers is enhanced, enhancing its abrasion resistance.

[0071] Experiment 3 Pilling resistance test Take the same samples as in Experiment 1 for the experiment.

[0072] Experimental equipment: ICI rolling box pilling tester, electronic balance, lighting equipment.

[0073] Fix the sample on the ICI rolling box pilling tester, set the test parameters according to the test method of GB / T 4802.1-2008 standard (number of rubbing times: 100 times, rubbing speed: 60±2 rpm), start the ICI rolling box pilling tester, and conduct a rubbing test on the sample; after the test is over, take out the sample, carefully observe and record the pilling situation on the sample surface using the lighting equipment, conduct pilling rating, and measure and calculate the mass loss of the sample with an electronic balance (Table 3).

[0074] Table 3 Pilling resistance test results

[0075] It can be seen from Table 3 that the pilling resistance performance of Examples 1-3 is better than that of Comparative Examples 1-7, proving that the yarn prepared by the present invention also has good pilling resistance performance.

Claims

1. A blending process of cashmere and graphene fiber, characterized in that, It includes the following steps: S1. Add acrylic acid, cyclohexanone peroxide and silane coupling agent into ethanol for dissolution, and dilute it 10 - 20 times with distilled water to obtain a composite modifier; S2. Immerse the graphene fiber in the composite modifier and treat it at 60 - 80 °C for 6 - 8 hours; S3. Perform steam treatment on the immersed graphene fiber for 30 - 50 minutes to obtain a modified graphene fiber; S4. Place the cashmere fiber in the ionic liquid [BMIM]Cl for pretreatment for 10 - 15 minutes, and then immerse it in a composite enzyme solution with a mass concentration of 0.1% - 0.3% for 10 - 20 minutes to obtain a modified cashmere fiber; The composite enzyme solution is composed of protease, cellulase and laccase; S5. Mix the modified cashmere fiber and the modified graphene fiber according to a mass ratio of 4 - 5:1, and after laying, mixing, carding and spinning, obtain a blended yarn; S6. Perform low-temperature plasma treatment on the blended yarn in an inert gas atmosphere, with a power of 50 - 100 W and a time of 2 - 5 minutes, and then perform steam treatment at 100 - 130 °C for 20 - 30 minutes to obtain the finished product.

2. The blended process of cashmere and graphene fiber according to claim 1, characterized in that, In step S1, in the composite modifier, the mass ratio of acrylic acid: cyclohexanone peroxide: silane coupling agent is 18 - 22:0.5:0.1 - 0.

3.

3. The blended process of cashmere and graphene fiber according to claim 2, characterized in that, In step S1, the silane coupling agent is γ-aminopropyltriethoxysilane or γ-glycidoxypropyltrimethoxysilane.

4. The blended process of cashmere and graphene fiber according to claim 1, characterized in that, In step S3, the temperature of the steam during the steam treatment is 110 - 120 °C.

5. A blending process of cashmere and graphene fiber as claimed in claim 1, characterized in that, In step S4, the ionic liquid pretreatment is carried out under ultrasonic assistance, with an ultrasonic frequency of 40 kHz and a power of 200 - 300 W.

6. The blended process of cashmere and graphene fiber according to claim 1, characterized in that, In step S4, in the composite enzyme solution, protease and cellulase are composed according to a volume ratio of 1:1, and the addition amount of laccase is 0.05% - 0.1% of the total volume of protease and cellulase.

7. A blending process of cashmere and graphene fiber according to claim 1, characterized in that, In step S4, the mass concentration of the ionic liquid [BMIM]Cl is 5% - 10%.

8. The blended process of cashmere and graphene fiber according to claim 1, characterized in that In step S5, 3% - 5% by mass of spandex fiber is also incorporated into the blended yarn.

9. A blending process of cashmere and graphene fiber according to claim 1, characterized in that In step S5, when spinning, the Z twist direction is adopted, the twist multiple is 580 - 620 T / M, and the spindle speed is 6500 - 7000 rpm.

10. A blending process of cashmere and graphene fiber as described in claim 1, characterized in that, In step S6, the inert gas is nitrogen or argon.

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