A blending process of cashmere and graphene fiber

Abstract

The invention discloses a blending process of cashmere and graphene fiber, which relates to cashmere textile technology. The process comprises the following steps: S1, adding acrylic acid and cyclohexanone peroxide to ethanol to completely dissolve the mixture, and then diluting the mixture by 10-20 times with distilled water to obtain a modifier; S2, soaking the graphene fiber in the modifier for 6-8 hours; S3, performing steam treatment to obtain modified graphene fiber; S4, soaking the cashmere fiber in [BMIM]Cl; S5, taking a protease solution and a cellulase solution, and soaking the cashmere fiber to obtain modified cashmere fiber; S6, taking the modified cashmere fiber and the modified graphene fiber; S7, beating the mixture; S8, combing the mixture to obtain blended fiber; S9, performing a spinning process on the blended fiber to obtain a blended yarn; and S10, steam treatment. The invention solves the problems of uneven blending and weak bonding caused by differences in surface properties between the graphene fiber and the cashmere fiber.

Description

Technical Field

[0001] The present invention relates to the technical field of cashmere textiles, and in particular to a blending process of cashmere and graphene fibers. Background Art

[0002] Cashmere, a precious natural animal fiber, is a key raw material for high-end textiles due to its exceptional softness, lightness, and warmth. However, cashmere fiber itself suffers from significant performance flaws, including poor wrinkle resistance, low mechanical strength, pilling, and insufficient abrasion resistance, which severely limit its application in high-end functional textiles.

[0003] In recent years, graphene fibers, with their exceptional mechanical properties, superior thermal conductivity, and unique interfacial effects, have provided a novel approach to the functional upgrade of textile materials. Blending graphene fibers with cashmere offers complementary advantages: cashmere provides comfort, while graphene enhances mechanical properties and imparts new functions such as thermal conductivity and antibacterial properties.

[0004] However, in actual applications, 1. The surface of graphene fiber is highly inert, and the polarity difference with cashmere leads to insufficient mixing uniformity, and fiber stratification is prone to occur during the spinning process; 2. Due to the significant difference in modulus between graphene fiber and cashmere fiber, traditional spinning technology is difficult to form a stable interface bonding, and interface peeling is prone to occur during use; 3. Simple physical mixing will mask the electrical and thermal conductivity properties of graphene, and the natural softness of cashmere may be destroyed.

[0005] Therefore, developing a blending process that can retain the natural characteristics of cashmere, achieve efficient performance of graphene functions and strong interface bonding has become a technical problem that the industry urgently needs to break through. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a blending process of cashmere and graphene fiber, comprising the following steps:

[0007] S1. Dissolve acrylic acid, cyclohexanone peroxide, and a silane coupling agent in ethanol, and dilute with distilled water 10-20 times to obtain a composite modifier;

[0008] S2, soaking the graphene fiber in the composite modifier and treating it at 60-80°C for 6-8 hours;

[0009] S3, steam treating the soaked graphene fiber for 30-50 minutes to obtain modified graphene fiber;

[0010] Through the synergistic effect of the composite modifier, polar groups such as carboxyl and amino groups are introduced on the surface of the graphene fiber, which significantly reduces its surface inertness, narrows the polarity difference between it and the cashmere fiber, and is easier to disperse evenly during mixing. Steam treatment further activates the functional groups on the fiber surface, strengthens the hydrogen bond and van der Waals force with the cashmere fiber, and avoids stratification caused by density differences during the spinning process.

[0011] The modulus gradient of the modified graphene fiber is more compatible with cashmere fiber, reducing the risk of interfacial delamination during spinning and subsequent use, while retaining the high strength of graphene, significantly improving the tensile and abrasion resistance of the blended yarn. Furthermore, surface modification prevents the graphene from being physically encapsulated by the cashmere fiber, ensuring that its heat conduction channels and antibacterial sites are fully exposed, giving the blended fabric excellent thermal management properties and antibacterial effects.

[0012] S4, pretreating the cashmere fiber in the ionic liquid [BMIM]Cl for 10-15 minutes, and then soaking the cashmere fiber in a complex enzyme solution with a mass concentration of 0.1%-0.3% for 10-20 minutes to obtain modified cashmere fiber; the complex enzyme solution comprises protease, cellulase and laccase;

[0013] Treating cashmere fibers with [BMIM]Cl ionic liquid gently opens the fiber's surface scales, increasing the specific surface area without compromising its natural softness and warmth, while also promoting the penetration efficiency of the enzyme treatment. Protease / cellulase synergistically degrades redundant proteins and impurities on the cashmere surface, while laccase further cross-links the fiber surface, reducing pilling and improving surface smoothness while preserving the cashmere's fluffiness and feel.

[0014] S5, mixing the modified cashmere fiber and the modified graphene fiber in a mass ratio of 4-5:1, and obtaining a blended yarn after layering, mixing, combing, and spinning.

[0015] S6. treating the blended yarn with low-temperature plasma in an inert gas atmosphere at a power of 50-100 W for 2-5 minutes, followed by steam treatment at 100-130° C. for 20-30 minutes to obtain a finished product;

[0016] Low-temperature plasma treatment further activates the graphene surface, forming a more stable chemical bond with the cashmere fiber, while avoiding the damage of high temperature to the natural properties of cashmere.

[0017] Furthermore, 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.

[0018] Furthermore, in step S1, the silane coupling agent is γ-aminopropyltriethoxysilane (KH550) or γ-glycidoxypropyltrimethoxysilane (KH560).

[0019] Furthermore, in step S3, the temperature of the steam during the steam treatment is 110-120°C.

[0020] Furthermore, in step S4, the ionic liquid pretreatment is performed with the assistance of ultrasound, with an ultrasound frequency of 40 kHz and a power of 200-300 W.

[0021] Furthermore, in step S4, in the complex enzyme solution, protease and cellulase are composed of a volume ratio of 1:1, and the amount of laccase added is 0.05%-0.1% of the total volume of protease and cellulase.

[0022] Furthermore, in step S4, the mass concentration of the ionic liquid [BMIM]Cl is 5%-10%.

[0023] Furthermore, in step S5, 3% to 5% by mass of spandex fiber is also added to the blended yarn.

[0024] 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.

[0025] Furthermore, in step S6, the inert gas is nitrogen or argon.

[0026] The surface properties of cashmere fiber and graphene fiber are quite different, which makes it difficult to mix the two evenly during the blending process, and the fiber agglomeration or uneven distribution is likely to occur. The two are also difficult to firmly combine. The present invention modifies the graphene fiber and cashmere fiber at the same time, so that the surface properties are closer, and the fibers can be evenly distributed during blending, 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 bonding is improved, thereby improving their breaking strength and elongation at break. Moreover, after the modification, the graphene fiber and the blended yarn are steam-treated. 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, enhance the bonding force between the fibers. That is, the present invention enhances the intermolecular interaction between the graphene fiber and the cashmere fiber by modifying and steam-treating the graphene fiber and the cashmere fiber, forming a tighter bond, improving the physical fastness of the cashmere fiber, solving the defect that cashmere and graphene fibers are difficult to form a firm bond during the blending process, and significantly improving its durability.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention simultaneously modifies graphene fibers and cashmere fibers. To address the surface inertness of graphene fibers and the polarity difference between graphene fibers and cashmere fibers, a composite modifier consisting of acrylic acid, cyclohexanone peroxide, and a silane coupling agent is used for chemical modification, and steam treatment is combined to enhance their surface activity. The cashmere fibers are pretreated with ionic liquids and synergistically treated with a composite enzyme (protease, cellulase, and laccase), effectively improving the interfacial compatibility of the two fibers and solving the problems of insufficient mixing uniformity and spinning stratification.

[0029] 2. The present invention modifies graphene fibers and cashmere fibers simultaneously, significantly improving the interfacial bonding strength between graphene and cashmere through dual-fiber modification. Combined with 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 of cashmere, but also gives full play to the mechanical enhancement, thermal conductivity and antibacterial functions of graphene, achieving complementary performance advantages.

[0030] 3. In the present invention, polar groups such as carboxyl and amino groups are introduced on the surface of the graphene fiber through the synergistic effect of the composite modifier, which significantly reduces its surface inertness, reduces the polarity difference between it and the cashmere fiber, and makes it easier to disperse evenly during mixing. The steam treatment further activates the functional groups on the fiber surface, enhances the hydrogen bonds and van der Waals forces with the cashmere fiber, and avoids the stratification phenomenon caused by density differences during the spinning process; moreover, the modulus gradient of the modified graphene fiber is more compatible with the cashmere fiber, reducing the risk of interface peeling during spinning and subsequent use, while retaining the high strength characteristics of graphene, significantly improving the tensile and wear resistance of the blended yarn; moreover, the surface modification avoids the physical wrapping of the graphene by the cashmere fiber, ensuring that its heat conduction channels and antibacterial sites are fully exposed, so that the blended fabric has excellent thermal management properties and antibacterial effects.

[0031] 4. In the present invention, [BMIM]Cl ionic liquid is used to treat cashmere fibers with the assistance of ultrasound, which can gently open the scale layer on the fiber surface, increase the specific surface area without destroying its natural softness and warmth, and promote the penetration efficiency of enzyme treatment; protease / cellulase synergistically degrades redundant proteins and impurities on the cashmere surface, and laccase further cross-links the fiber surface, reducing the pilling tendency and improving the surface smoothness, while retaining the fluffiness and touch of the cashmere. DETAILED DESCRIPTION

[0032] Example 1

[0033] A blending process of cashmere and graphene fiber comprises the following steps:

[0034] S1, dissolving acrylic acid, cyclohexanone peroxide and a silane coupling agent in ethanol, and diluting the mixture 10 times with distilled water to obtain a composite modifier;

[0035] S2, soaking the graphene fiber in the composite modifier and treating it at 60°C for 6 hours;

[0036] S3, steam treating the soaked graphene fiber for 30 minutes to obtain modified graphene fiber;

[0037] S4, pretreating the cashmere fiber in the ionic liquid [BMIM]Cl for 10 minutes, and then immersing the fiber in a 0.1% complex enzyme solution for 10 minutes to obtain modified cashmere fiber; the complex enzyme solution comprises protease, cellulase, and laccase;

[0038] S5, mixing the modified cashmere fiber and the modified graphene fiber in a mass ratio of 4:1, and obtaining a blended yarn after layering, mixing, combing, and spinning.

[0039] S6. The blended yarn is subjected to low-temperature plasma treatment in an inert gas atmosphere at a power of 50 W for 2 minutes, followed by steam treatment at 100° C. for 20 minutes to obtain a finished product.

[0040] 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.

[0041] Preferably, in step S1, the silane coupling agent is γ-aminopropyltriethoxysilane (KH550).

[0042] Preferably, in step S3, the temperature of the steam during the steam treatment is 110°C.

[0043] Preferably, in step S4, the ionic liquid pretreatment is performed with the assistance of ultrasound, with an ultrasound frequency of 40 kHz and a power of 200 W.

[0044] Preferably, in step S4, in the complex enzyme solution, protease and cellulase are composed in a volume ratio of 1:1, and the added amount of laccase is 0.05% of the total volume of protease and cellulase.

[0045] Preferably, in step S4, the mass concentration of the ionic liquid [BMIM]Cl is 5%.

[0046] Preferably, in step S5, 3% by mass of spandex fiber is further incorporated into the blended yarn.

[0047] Preferably, in step S5, the spun yarn is processed in a Z twist direction, with a twist of 580 T / M and a spindle speed of 6500 rpm.

[0048] Preferably, in step S6, the inert gas is nitrogen.

[0049] Example 2

[0050] A blending process of cashmere and graphene fiber comprises the following steps:

[0051] S1, dissolving acrylic acid, cyclohexanone peroxide and silane coupling agent in ethanol, and diluting 20 times with distilled water to obtain a composite modifier;

[0052] S2, soaking the graphene fiber in the composite modifier and treating it at 80°C for 8 hours;

[0053] S3, steam treating the soaked graphene fiber for 50 minutes to obtain modified graphene fiber;

[0054] S4, pretreating the cashmere fiber in the ionic liquid [BMIM]Cl for 15 minutes, and then immersing the fiber in a 0.3% complex enzyme solution for 20 minutes to obtain modified cashmere fiber; the complex enzyme solution comprises protease, cellulase, and laccase;

[0055] S5, mixing the modified cashmere fiber and the modified graphene fiber in a mass ratio of 5:1, and obtaining a blended yarn after layering, mixing, combing, and spinning.

[0056] S6. The blended yarn is subjected to low-temperature plasma treatment in an inert gas atmosphere at a power of 100 W for 5 minutes, followed by steam treatment at 130° C. for 30 minutes to obtain a finished product.

[0057] 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.

[0058] Preferably, in step S1, the silane coupling agent is γ-aminopropyltriethoxysilane (KH550) or γ-glycidoxypropyltrimethoxysilane (KH560).

[0059] Preferably, in step S3, the temperature of the steam during the steam treatment is 120°C.

[0060] Preferably, in step S4, the ionic liquid pretreatment is performed with the assistance of ultrasound, with an ultrasound frequency of 40 kHz and a power of 300 W.

[0061] Preferably, in step S4, in the complex enzyme solution, protease and cellulase are composed in a volume ratio of 1:1, and the added amount of laccase is 0.1% of the total volume of protease and cellulase.

[0062] Preferably, in step S4, the mass concentration of the ionic liquid [BMIM]Cl is 10%.

[0063] Preferably, in step S5, 5% by mass of spandex fiber is further incorporated into the blended yarn.

[0064] Preferably, in step S5, the spun yarn is processed in a Z twist direction, with a twist of 620 T / M and a spindle speed of 7000 rpm.

[0065] Preferably, in step S6, the inert gas is argon.

[0066] Example 3

[0067] A blending process of cashmere and graphene fiber comprises the following steps:

[0068] S1, dissolving acrylic acid, cyclohexanone peroxide and silane coupling agent in ethanol, and diluting 15 times with distilled water to obtain a composite modifier;

[0069] S2, soaking the graphene fiber in the composite modifier and treating it at 70°C for 7 hours;

[0070] S3, steam treating the soaked graphene fiber for 40 minutes to obtain modified graphene fiber;

[0071] S4, pretreating the cashmere fiber in the ionic liquid [BMIM]Cl for 12 minutes, and then immersing the fiber in a 0.2% complex enzyme solution for 15 minutes to obtain modified cashmere fiber; the complex enzyme solution comprises protease, cellulase, and laccase;

[0072] S5, mixing the modified cashmere fiber and the modified graphene fiber in a mass ratio of 4.5:1, and obtaining a blended yarn after layering, mixing, combing, and spinning.

[0073] S6. The blended yarn is subjected to low-temperature plasma treatment in an inert gas atmosphere at a power of 80 W for 3 minutes, followed by steam treatment at 110° C. for 25 minutes to obtain a finished product.

[0074] 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.

[0075] Preferably, in step S1, the silane coupling agent is γ-aminopropyltriethoxysilane (KH550) or γ-glycidoxypropyltrimethoxysilane (KH560).

[0076] Preferably, in step S3, the temperature of the steam during the steam treatment is 115°C.

[0077] Preferably, in step S4, the ionic liquid pretreatment is performed with the assistance of ultrasound, with an ultrasound frequency of 40 kHz and a power of 250 W.

[0078] Preferably, in step S4, in the complex enzyme solution, protease and cellulase are composed in a volume ratio of 1:1, and the added amount of laccase is 0.08% of the total volume of protease and cellulase.

[0079] Preferably, in step S4, the mass concentration of the ionic liquid [BMIM]Cl is 8%.

[0080] Preferably, in step S5, 4% by mass of spandex fiber is further incorporated into the blended yarn.

[0081] Preferably, in step S5, the spun yarn is processed in a Z twist direction, with a twist of 600 T / M and a spindle speed of 6800 rpm.

[0082] Preferably, in step S6, the inert gas is nitrogen.

[0083] Comparative Example 1

[0084] The difference between this comparative example and Example 3 is that unmodified graphene fiber and modified cashmere fiber are blended, and the remaining steps are the same as those in Example 3.

[0085] Comparative Example 2

[0086] The difference between this comparative example and Example 3 is that unmodified cashmere fiber and modified graphene fiber are blended, and the remaining steps are the same as those in Example 3.

[0087] Comparative Example 3

[0088] The difference between this comparative example and Example 3 is that steam treatment is not performed in step S6, and the remaining steps are the same as those in Example 3.

[0089] Comparative Example 4

[0090] The difference between this comparative example and Example 3 is that in the composite modifier of step S1, the mass ratio of acrylic acid: cyclohexanone peroxide: silane coupling agent is 10:0.5:0.2.

[0091] Comparative Example 5

[0092] The difference between this comparative example and Example 3 is that when the graphene fiber is modified, the modifiers are acrylic acid and cyclohexanone peroxide, and the mass ratio is 30:0.5:0.2.

[0093] Comparative Example 6

[0094] The difference between this comparative example and Example 3 is that in step S4, the ionic liquid [BMIM]Cl pretreatment is not used.

[0095] Comparative Example 7

[0096] The difference between this comparative example and Example 3 is that in step S4, no complex enzyme solution treatment is used.

[0097] Experimental part

[0098] Experiment 1: Tensile strength test

[0099] Take 5 cashmere and graphene fiber blended yarn samples prepared in Examples 1, 2, 3 and Comparative Examples 1, 2, 3, 4, 5, 6, and 7, respectively, with a length of 50 cm.

[0100] Experimental instruments: electronic universal material testing machine, standard environmental temperature and humidity control box (temperature 20±2℃, relative humidity 65±2%).

[0101] After the yarn sample was placed in a standard ambient temperature and humidity control box for 24 hours, the sample was fixed on the clamp of an electronic universal material testing machine with a clamp spacing of 20 cm. The sample was stretched at a tensile speed of 100 mm / min until it broke. The maximum force at break (N) was recorded, and the elongation at break (%) was calculated. The results are shown in Table 1.

[0102] Table 1 Tensile performance test results

[0103]

[0104] 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 present invention effectively improves the tensile strength of the blended yarn through modification and steam treatment.

[0105] In Comparative Example 1, the graphene fiber was not modified, and in Comparative Example 2, the cashmere fiber was not modified. The breaking strength and elongation at break were low, indicating that modification treatment is crucial for optimizing the surface properties of the graphene fiber and cashmere fiber. In Comparative Example 3, no steam treatment was performed, and the breaking strength and elongation at break were lower than those in Example 3, indicating that steam treatment can further enhance the bonding force between the fiber and the cashmere. In Comparative Examples 4 and 5, the breaking strength and elongation at break were also low due to improper use of the modifier ratio, indicating that when the modifier of the present invention is used to modify the graphene fiber, in addition to the selection of the modifier, its ratio is also equally important. In the present invention, the optimal effect is achieved when the mass ratio of acrylic acid: cyclohexanone peroxide: silane coupling agent is 18-22: 0.5: 0.1-0.3. In Comparative Example 6, the cashmere was not pretreated with the ionic liquid [BMIM]Cl, and in Comparative Example 7, the cashmere was not treated with the composite enzyme solution. The breaking strength and elongation at break were low, indicating that [BMIM]Cl and enzyme treatment play an important role in the modification of cashmere fibers.

[0106] The surface properties of cashmere fiber and graphene fiber are quite different, which makes it difficult for the two to mix evenly during the blending process, and the phenomenon of fiber agglomeration or uneven distribution is prone to occur. The two are also difficult to firmly combine. The present invention modifies the graphene fiber and cashmere fiber at the same time, so that the surface properties of the two fibers tend to be consistent, and they can be evenly distributed during blending, avoiding the problems of fiber agglomeration and uneven distribution. It makes it easier for graphene fiber to combine with cashmere fiber, improves its bonding strength, and thus improves its breaking strength and elongation at break. At the same time, after the modification, the graphene fiber and the blended yarn are steam-treated. 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 osmosis, enhance the bonding force between the fibers.

[0107] Experiment 2 Wear resistance test

[0108] Take the same sample as Experiment 1 and conduct the experiment.

[0109] Experimental equipment: Martindale abrasion tester, standard environmental temperature and humidity control box (temperature 20±2℃, relative humidity 65±2%).

[0110] The test was conducted using a Martindale abrasion tester in accordance with the test method of GB / T 21196.2-2007: the fabric sample was fixed to the tester, a pressure of 12 kPa was applied, and the fabric was rubbed with wool felt. The number of frictions until the fabric surface showed obvious wear or breakage was recorded. Each group of samples was tested 5 times, and the average value was taken as the final result (see Table 2).

[0111] Table 2 Wear resistance test results

[0112]

[0113] As can be seen from Table 2, the wear times of Examples 1-3 are significantly higher than those of Comparative Examples 1-7, indicating that the wear resistance of the blended yarn is effectively improved after the graphene fiber and cashmere fiber are modified and steam treated; this may be because the surface properties of the cashmere fiber and the graphene fiber are quite different, which makes it difficult to mix the two evenly during the blending process, and the interface bonding is not strong, and the fiber is prone to falling off or peeling off during use, thereby affecting the wear resistance; at the same time, 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, enhance the binding force between the fibers and enhance their wear resistance.

[0114] Experiment 3 Anti-pilling test

[0115] Take the same sample as Experiment 1 and conduct the experiment.

[0116] Experimental equipment: ICI rolling box pilling tester, electronic balance, lighting equipment.

[0117] The samples were fixed on the ICI Roller Pilling Tester. The test parameters were set according to the standard test method of GB / T 4802.1-2008 (number of frictions: 100 times, friction speed: 60±2rpm). The ICI Roller Pilling Tester was started and the samples were subjected to friction testing. After the test, the samples were removed and the pilling conditions on the sample surfaces were carefully observed and recorded using lighting equipment. Pilling ratings were then assigned. The mass loss of the samples was measured and calculated using an electronic balance (Table 3).

[0118] Table 3 Anti-pilling test results

[0119]

[0120] As can be seen from Table 3, the anti-pilling performance of Examples 1-3 is better than that of Comparative Examples 1-7, which proves that the yarn prepared by the present invention also has good anti-pilling performance.

Claims

1. A blending process of cashmere and graphene fiber, characterized in that: The following steps are involved: S1. Dissolve acrylic acid, cyclohexanone peroxide, and a silane coupling agent in ethanol, and dilute with distilled water 10-20 times to obtain a composite modifier; S2, soaking the graphene fiber in the composite modifier and treating it at 60-80°C for 6-8 hours; S3, steam treating the soaked graphene fiber for 30-50 minutes to obtain modified graphene fiber; S4, pretreating the cashmere fiber in the ionic liquid [BMIM]Cl for 10-15 minutes, and then soaking the fiber in a complex enzyme solution with a mass concentration of 0.1%-0.3% for 10-20 minutes to obtain modified cashmere fiber; The complex enzyme solution consists of protease, cellulase and laccase; S5, mixing the modified cashmere fiber and the modified graphene fiber in a mass ratio of 4-5:1, and obtaining a blended yarn after layering, mixing, combing, and spinning. S6. treating the blended yarn with low-temperature plasma in an inert gas atmosphere at a power of 50-100 W for 2-5 minutes, followed by steam treatment at 100-130° C. for 20-30 minutes to obtain a finished product; In the composite modifier, the mass ratio of acrylic acid: cyclohexanone peroxide: silane coupling agent is 18-22: 0.5: 0.1-0.

3.

2. The process for blending cashmere and graphene fiber according to claim 1, wherein: In step S1, the silane coupling agent is γ-aminopropyltriethoxysilane or γ-glycidyloxypropyltrimethoxysilane.

3. The process for blending cashmere and graphene fiber according to claim 1, wherein: In step S3, the temperature of the steam during the steam treatment is 110-120°C.

4. The process for blending cashmere and graphene fiber according to claim 1, wherein: In step S4, the ionic liquid pretreatment is performed with the assistance of ultrasound, with an ultrasound frequency of 40 kHz and a power of 200-300 W.

5. The process for blending cashmere and graphene fiber according to claim 1, wherein: In step S4, in the complex enzyme solution, protease and cellulase are composed of a volume ratio of 1:1, and the amount of laccase added is 0.05%-0.1% of the total volume of protease and cellulase.

6. The process for blending cashmere and graphene fiber according to claim 1, wherein: In step S4, the mass concentration of the ionic liquid [BMIM]Cl is 5%-10%.

7. The process for blending cashmere and graphene fiber according to claim 1, wherein: In step S5, 3% to 5% by mass of spandex fiber is further added to the blended yarn.

8. The process for blending cashmere and graphene fiber according to claim 1, wherein: 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.

9. The process for blending cashmere and graphene fiber according to claim 1, wherein: In step S6, the inert gas is nitrogen or argon.

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