CN106750502A - A kind of Longaacting fragrance-aretaining regenerated celulose fibre - Google Patents

Abstract

The invention discloses a kind of regenerated cellulose fiber with long-acting fragrance. A carbon nanotube/cellulose composite material with unidirectional directional pores is obtained by freeze-drying technology, and the carbon nanotube/cellulose composite material is immersed in a solution containing spices and dried to obtain a long-lasting fragrance regenerated cellulose fiber. The long-lasting fragrance regenerated cellulose fiber prepared by the invention keeps the fragrance for a long time and has better mechanical properties.

Description

A long-lasting fragrance regenerated cellulose fiber

technical field

The invention belongs to the field of clothing production, and in particular relates to a long-acting fragrance-retaining regenerated cellulose fiber.

Background technique

In the field of clothing production, people pay more and more attention to the softness and comfort of fabrics, and also require fabrics to have various advantages such as warmth retention, beauty, and novelty. In order to meet people's increasing requirements for fabric performance, in recent years, clothing fabrics have developed from pure cotton products with relatively simple performance to blended fabrics with elegant appearance, soft hand feeling and excellent wearing performance. On this basis, people have developed many new fabrics, such as regenerated cellulose fibers. Regenerated cellulose fiber is made of natural cellulose (cotton, hemp, bamboo, tree, shrub, etc.) as raw material, without changing its chemical structure, only changing the physical structure of natural cellulose, so as to produce regenerated cellulose with better performance fiber. Its structure is similar to cotton, the difference is that its hygroscopicity and air permeability are better than cotton fibers, it can be said that it is the best hygroscopicity and air permeability of all chemical fibers, known as "breathing fabric" . The regenerated cellulose fiber fabric feels soft, smooth and cool, and is not prone to static electricity. It has the softness of cotton, the luster of silk, and the smoothness of hemp; it is comfortable and close-fitting, breathable and moisture-absorbing, and has good elasticity; 100% wt pure natural material, natural biodegradation, no additives, no heavy metals, no harmful chemicals, and no skin affinity Stimulate. Regenerated cellulose fiber, as a clothing fabric, overcomes many shortcomings of artificial synthetic fibers and has many new functions, but the existing regenerated cellulose fiber has no fragrance. Existing fabrics are generally also fragrance-free, so people like to spray perfume on clothes to increase the fragrance of clothes. But the perfume is easy to diffuse after spraying, and the fragrance cannot be retained for a long time.

Contents of the invention

The invention aims to solve the problems in the prior art, and provides a long-lasting fragrance regenerated cellulose fiber, and the fabric prepared by using the regenerated cellulose fiber has a long-lasting fragrance.

In order to achieve the above-mentioned technical purpose, the present invention has adopted following technical scheme:

A kind of regenerated cellulose fiber with long-lasting fragrance. The preparation steps mainly include: Step 1. After the bamboo chips are air-dried, they are immersed in water for pre-hydrolysis, and then subjected to secondary cooking, beating, pulp washing, bleaching, neutralization, impurity removal, After pulping and drying, regenerated bamboo cellulose is obtained; step 2, the regenerated bamboo cellulose obtained in step 1 is dispersed in a cellulose solvent, and stirred or mechanically kneaded while heating until the cellulose is completely dissolved to obtain a uniform Transparent cellulose homogeneous solution; step 3, ultrasonically dispersing carbon nanotubes and guanidine carbonate in water, then adding to the cellulose homogeneous solution prepared in step 2, stirring and mixing evenly; step 4, making the prepared cellulose in step 3 The mixed solution is poured into a metal container, and unidirectionally frozen to obtain a cellulose frozen block; step 5, the cellulose frozen block obtained in step 4 is put into a vacuum freeze dryer, and vacuum freeze-dried to obtain a cellulose block with unidirectional directional holes. Carbon nanotube/cellulose composite material; step 6, immerse the carbon nanotube/cellulose composite material prepared in step 5 in the solution containing spices, and shake the carbon nanotube/fiber back and forth along the direction of the unidirectional directional hole The plain composite material is made to fully enter the solution containing fragrance into the carbon nanotube/cellulose composite material, and then the carbon nanotube/cellulose composite material is taken out and dried at room temperature.

As an improved technical solution of the present invention, in the first step, the bamboo slices are water bamboo, moso bamboo, and four-season bamboo, and the molecular weight of the regenerated bamboo cellulose is 5×10 ⁴ to 1×10 ⁵ .

As an improved technical solution of the present invention, in step 2, the heating temperature is 60-80°C, and the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is 25-45%wt.

As an improved technical solution of the present invention, in step 2, the cellulose solvent is mainly one or both of N-methylmorpholine oxide aqueous solution and 1-butyl-3-methylimidazolium chloride aqueous solution , wherein, the mass fraction of the N-methylmorpholine oxide or 1-butyl-3-methylimidazolium chloride in the aqueous solution is 5-15%wt.

As an improved technical solution of the present invention, in step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 15-30%wt and 1-5%wt respectively, and the mass ratio of the water to the cellulose homogeneous solution is 10-25%.

As an improved technical solution of the present invention, in step 4, the one-way freezing is implemented by moving the end of the metal container to the cold trap at a constant speed, and the temperature of the cold trap is -20 to -40°C , The constant speed is -0.5~5mm/min.

As an improved technical solution of the present invention, in step 4, the one-way freezing is implemented by maintaining the bottom of the metal container at a constant temperature, and the constant temperature is -40 to -80°C.

As an improved technical solution of the present invention, in step five, the temperature in the vacuum freeze dryer is -30 to -20° C., and the vacuum degree is 1 to 10 Pa.

As an improved technical solution of the present invention, in step six, the fragrance-containing solution mainly includes 8-18%wt essence, 0.5-2.5wt% orientation agent, 0.2-1wt% surfactant, 0.1-0.5%wt chlorinated It is composed of sodium and the rest of deionized water, and the soaking time is 2 to 10 hours.

As a further improved technical solution of the present invention, the carbon nanotube/cellulose composite material treated in step 6 is immersed in a transparent agar solution at 80-95°C, and the carbon nanotube/cellulose composite material is shaken back and forth along the direction of the unidirectional oriented hole. For the cellulose composite material, the agar solution is allowed to fully enter the carbon nanotube/cellulose composite material, the content of the agar is 0.5-2% wt, and then taken out and cooled to normal temperature.

Beneficial effect:

The present invention obtains a carbon nanotube/cellulose composite material with a unidirectional directional pore structure through unidirectional freeze-drying technology, and then utilizes the capillary action of the unidirectional directional hole to suck the perfume-containing solution into the carbon nanotube/cellulose composite material . Because the regenerated cellulose prepared by the present invention has a unidirectional directional pore structure and has a larger specific surface area, the fragrance of the spices is slowly released from the pore walls of the unidirectional directional pores, so the fragrance of the spices in the carbon nanotube/cellulose composite material It stays for a long time and has a long-lasting fragrance function. Adding a small amount of sodium chloride to the solution containing spices can enhance the fragrance of the spices. On this basis, the present invention immerses the spice-impregnated carbon nanotube/cellulose composite material into the agar solution, uses the agar to block the spice in the carbon nanotube/cellulose composite material, and further prolongs the fragrance-emitting time of the spice. In addition, the regenerated cellulose fibers prepared by the present invention have better mechanical properties and are more washable and wear-resistant than common regenerated cellulose fibers due to the addition of carbon nanotubes.

detailed description

In order to make those skilled in the art understand the present invention more clearly, the present invention will now be described in detail in conjunction with specific embodiments.

The preparation steps of the regenerated cellulose fiber with long-lasting fragrance of the present invention mainly include: Step 1. After air-drying the bamboo slices, immerse them in water for pre-hydrolysis, and then perform beating, pulp washing, bleaching, neutralization, and impurity removal after secondary cooking , pulping, and drying to obtain regenerated bamboo cellulose; step 2, dispersing the regenerated bamboo cellulose obtained in step 1 in a cellulose solvent, stirring or mechanically kneading while heating, until the cellulose is completely dissolved, to obtain Uniform and transparent cellulose homogeneous solution; step 3, ultrasonically disperse carbon nanotubes and guanidine carbonate in water, then add to the cellulose homogeneous solution prepared in step 2, stir and mix evenly; step 4, prepare the The mixed solution is poured into a metal container, and unidirectionally frozen to obtain a cellulose frozen block; step 5, put the cellulose frozen block obtained in step 4 into a vacuum freeze dryer, and vacuum freeze-dry to obtain a cellulose block with unidirectional directional holes. The carbon nanotube/cellulose composite material; Step 6, the carbon nanotube/cellulose composite material prepared in step 5 is immersed in the solution containing spices, and the carbon nanotube/cellulose composite material is shaken back and forth along the direction of the unidirectional directional hole. For the cellulose composite material, make the perfume-containing solution fully enter the carbon nanotube/cellulose composite material, then take out the carbon nanotube/cellulose composite material and dry it at room temperature.

The specific preparation process parameters of the long-lasting fragrance regenerated cellulose fiber are as shown in Examples 1-9:

Example 1

In step 1, the bamboo slices are water bamboo, moso bamboo, or four-season bamboo, and the molecular weight of the obtained regenerated bamboo cellulose is 5×10 ⁴ to 1×10 ⁵ .

In step 2, the heating temperature is 60°C, the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is 25%wt, and the cellulose solvent is mainly an aqueous solution of N-methylmorpholine oxide, wherein N -The mass fraction of methylmorpholine oxide in the aqueous solution is 5%wt.

In step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 15%wt and 1%wt respectively, and the mass ratio of water to cellulose homogeneous solution is 25%.

In Step 4, the one-way freezing is implemented by moving the end of the metal container to the cold trap at a constant speed, the temperature of the cold trap is -20° C., and the constant speed is -0.5 mm/min.

In step five, the temperature in the vacuum freeze dryer is -30°C, and the vacuum degree is 10Pa.

In step 6, the fragrance-containing solution includes 8%wt essence, 0.5wt% orientation agent, 0.2wt% surfactant, 0.1%wt sodium chloride, and the rest of deionized water. The soaking time is 2h, back and forth The shaking rate is 1 cm/s.

Example 2

In step 1, the bamboo slices are water bamboo, moso bamboo, or four-season bamboo, and the molecular weight of the obtained regenerated bamboo cellulose is 5×10 ⁴ to 1×10 ⁵ .

In step 2, the heating temperature is 70°C, the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is 30%wt, and the cellulose solvent is mainly 1-butyl-3-methylimidazole chloride A saline solution, wherein the mass fraction of 1-butyl-3-methylimidazolium chloride in the aqueous solution is 10%wt.

In step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 20%wt and 2%wt respectively, and the mass ratio of water to cellulose homogeneous solution is 20%.

In step 4, the one-way freezing is implemented by moving the end of the metal container to the cold trap at a constant speed, the temperature of the cold trap is -30°C, and the constant speed is -2.5 mm/min.

In step five, the temperature in the vacuum freeze dryer is -25°C, and the vacuum degree is 5Pa.

In step 6, the fragrance-containing solution includes 10%wt essence, 1wt% directional agent, 0.4wt% surfactant, 0.2%wt sodium chloride, and the rest of deionized water. The soaking time is 4h, and it is shaken back and forth The velocity is 10cm/s.

Example 3

In step 1, the bamboo slices are water bamboo, moso bamboo, or four-season bamboo, and the molecular weight of the obtained regenerated bamboo cellulose is 5×10 ⁴ to 1×10 ⁵ .

In step 2, the heating temperature is 80°C, the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is 35%wt, and the cellulose solvent is mainly 1-butyl-3-methylimidazole chloride A saline solution, wherein the mass fraction of 1-butyl-3-methylimidazolium chloride in the aqueous solution is 15%wt.

In step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 25%wt and 3%wt respectively, and the mass ratio of water to cellulose homogeneous solution is 15%.

In step 4, the one-way freezing is implemented by moving the end of the metal container to the cold trap at a constant speed, the temperature of the cold trap is -40°C, and the constant speed is -5 mm/min.

In step five, the temperature in the vacuum freeze dryer is -30°C, and the vacuum degree is 10Pa.

In step 6, the fragrance-containing solution includes 12%wt essence, 1.5wt% directional agent, 0.6wt% surfactant, 0.3%wt sodium chloride, and the rest of deionized water. The soaking time is 6h, back and forth The shaking rate is 50cm/s.

Example 4

In step 1, the bamboo slices are water bamboo, moso bamboo, or four-season bamboo, and the molecular weight of the obtained regenerated bamboo cellulose is 5×10 ⁴ to 1×10 ⁵ .

In step 2, the heating temperature is 70°C, the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is 40%wt, and the cellulose solvent is mainly N-methylmorpholine oxide and chlorinated 1 -A 1:1 aqueous solution of butyl-3-methylimidazolium salt, wherein the mass fraction of N-methylmorpholine oxide and 1-butyl-3-methylimidazolium chloride in the aqueous solution is 15%wt.

In step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 30%wt and 4%wt respectively, and the mass ratio of water to cellulose homogeneous solution is 20%.

In step four, the one-way freezing is implemented by maintaining the bottom of the metal container at a constant temperature, and the constant temperature is -80°C.

In step five, the temperature in the vacuum freeze dryer is -20°C, and the vacuum degree is 5Pa.

In step 6, the fragrance-containing solution includes 15%wt essence, 2wt% directional agent, 0.8wt% surfactant, 0.4%wt sodium chloride, and the rest of deionized water. The soaking time is 8h, and it is shaken back and forth The velocity is 100cm/s.

Example 5

In step 1, the bamboo slices are water bamboo, moso bamboo, or four-season bamboo, and the molecular weight of the obtained regenerated bamboo cellulose is 5×10 ⁴ to 1×10 ⁵ .

In step 2, the heating temperature is 80°C, the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is 45%wt, and the cellulose solvent is mainly N-methylmorpholine oxide and chlorinated 1 -Butyl-3-methylimidazolium salt 1:1 aqueous solution, wherein the mass fraction of N-methylmorpholine oxide and 1-butyl-3-methylimidazolium chloride in the aqueous solution is 10%wt.

In step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 20%wt and 5%wt respectively, and the mass ratio of water to cellulose homogeneous solution is 5%.

In step four, the one-way freezing is implemented by maintaining the bottom of the metal container at a constant temperature, and the constant temperature is -60°C.

In step five, the temperature in the vacuum freeze dryer is -20°C, and the vacuum degree is 5Pa.

In step 6, the fragrance-containing solution includes 18%wt essence, 2.5wt% directional agent, 1wt% surfactant, 0.5%wt sodium chloride, and the rest of deionized water. The soaking time is 10h, and it is shaken back and forth The velocity is 1 cm/s.

Example 6

In step 1, the bamboo slices are water bamboo, moso bamboo, or four-season bamboo, and the molecular weight of the obtained regenerated bamboo cellulose is 5×10 ⁴ to 1×10 ⁵ .

In step 2, the heating temperature is 80°C, the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is 30%wt, and the cellulose solvent is mainly N-methylmorpholine oxide and chlorinated 1 -Butyl-3-methylimidazolium salt 1:1 aqueous solution, wherein the mass fraction of N-methylmorpholine oxide and 1-butyl-3-methylimidazolium chloride in the aqueous solution is 10%wt.

In step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 20%wt and 5%wt respectively, and the mass ratio of water to cellulose homogeneous solution is 5%.

In step four, the one-way freezing is implemented by maintaining the bottom of the metal container at a constant temperature, and the constant temperature is -40°C.

In step five, the temperature in the vacuum freeze dryer is -20°C, and the vacuum degree is 5Pa.

In step 6, the fragrance-containing solution includes 18%wt essence, 2.5wt% directional agent, 1wt% surfactant, 0.5%wt sodium chloride, and the rest of deionized water, soaking time is 2h, shake back and forth The velocity is 1 cm/s.

In order to further increase the duration of spices, after step six, the carbon nanotube/cellulose composite material is post-treated, and the post-treatment steps are as follows: get agar and deionized water, according to the mass ratio of 0.5:99.5, while Heating to 80°C while stirring, so that agar and deionized water form a transparent mixed solution; then immerse the carbon nanotube/cellulose composite in the transparent mixed solution, and shake the carbon nanotubes back and forth along the direction of the unidirectional oriented holes. The tube/cellulose composite material was shaken back and forth at a rate of 10 cm/s for 1 hour to allow the agar solution to fully enter the carbon nanotube/cellulose composite material, and then the carbon nanotube/cellulose composite material was taken out and cooled to room temperature.

Example 7

In step 1, the bamboo slices are water bamboo, moso bamboo, or four-season bamboo, and the molecular weight of the obtained regenerated bamboo cellulose is 5×10 ⁴ to 1×10 ⁵ .

In step 2, the heating temperature is 60°C, the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is 25%wt, and the cellulose solvent is mainly an aqueous solution of N-methylmorpholine oxide, wherein N -The mass fraction of methylmorpholine oxide in the aqueous solution is 5%wt.

In step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 15%wt and 1%wt respectively, and the mass ratio of water to cellulose homogeneous solution is 25%.

In step four, the one-way freezing is implemented by maintaining the bottom of the metal container at a constant temperature, and the constant temperature is -80°C.

In step five, the temperature in the vacuum freeze dryer is -20°C, and the vacuum degree is 5Pa.

In step 6, the fragrance-containing solution includes 8%wt essence, 0.5wt% orientation agent, 0.2wt% surfactant, 0.1%wt sodium chloride, and the rest of deionized water. The soaking time is 2h, back and forth The shaking rate is 100cm/s.

In order to further increase the duration of the fragrance, after step six, the carbon nanotube/cellulose composite material is post-treated, and the post-treatment steps are as follows: get agar and deionized water, according to the mass ratio of 1:99, while Heating to 85°C while stirring, so that agar and deionized water form a transparent mixed solution; then immerse the carbon nanotube/cellulose composite in the transparent mixed solution, and shake the carbon nanotubes back and forth along the direction of the unidirectionally oriented holes The tube/cellulose composite material was shaken back and forth for 1.5 hours at a speed of 5 cm/s to allow the agar solution to fully enter the carbon nanotube/cellulose composite material, and then the carbon nanotube/cellulose composite material was taken out and cooled to room temperature.

Example 8

In step 1, the bamboo slices are water bamboo, moso bamboo, or four-season bamboo, and the molecular weight of the obtained regenerated bamboo cellulose is 5×10 ⁴ to 1×10 ⁵ .

In step 2, the heating temperature is 80°C, the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is 35%wt, and the cellulose solvent is mainly 1-butyl-3-methylimidazole chloride A saline solution, wherein the mass fraction of 1-butyl-3-methylimidazolium chloride in the aqueous solution is 15%wt.

In step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 20%wt and 5%wt respectively, and the mass ratio of water to cellulose homogeneous solution is 5%.

In step four, the one-way freezing is implemented by maintaining the bottom of the metal container at a constant temperature, and the constant temperature is -60°C.

In step five, the temperature in the vacuum freeze dryer is -20°C, and the vacuum degree is 5Pa.

In step 6, the fragrance-containing solution includes 12%wt essence, 1.5wt% directional agent, 0.6wt% surfactant, 0.3%wt sodium chloride, and the rest of deionized water. The soaking time is 6h, back and forth The shaking rate is 50cm/s.

In order to further increase the duration of the fragrance, after step six, the carbon nanotube/cellulose composite material is post-treated, and the post-treatment steps are as follows: get agar and deionized water, according to the mass ratio of 1.5:98.5, while Heating to 90°C while stirring to make agar and deionized water form a transparent mixed solution; then immerse the carbon nanotube/cellulose composite in the transparent mixed solution, and shake the carbon nanotubes back and forth along the direction of the unidirectional oriented holes. The tube/cellulose composite material was shaken back and forth at a rate of 5 cm/s for 2 hours to allow the agar solution to fully enter the carbon nanotube/cellulose composite material, and then the carbon nanotube/cellulose composite material was taken out and cooled to room temperature.

Example 9

In step 1, the bamboo slices are water bamboo, moso bamboo, or four-season bamboo, and the molecular weight of the obtained regenerated bamboo cellulose is 5×10 ⁴ to 1×10 ⁵ .

In step 2, the heating temperature is 80°C, the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is 45%wt, and the cellulose solvent is mainly N-methylmorpholine oxide and chlorinated 1 -Butyl-3-methylimidazolium salt 1:1 aqueous solution, wherein the mass fraction of N-methylmorpholine oxide and 1-butyl-3-methylimidazolium chloride in the aqueous solution is 10%wt.

In step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 20%wt and 2%wt respectively, and the mass ratio of water to cellulose homogeneous solution is 20%.

In step 4, the one-way freezing is implemented by moving the end of the metal container to the cold trap at a constant speed, the temperature of the cold trap is -30°C, and the constant speed is -2.5 mm/min.

In step five, the temperature in the vacuum freeze dryer is -25°C, and the vacuum degree is 5Pa.

In step 6, the fragrance-containing solution includes 18%wt essence, 2.5wt% directional agent, 1wt% surfactant, 0.5%wt sodium chloride, and the rest of deionized water. The soaking time is 10h, and it is shaken back and forth The velocity is 10cm/s.

In order to further increase the duration of spices, after step six, the carbon nanotube/cellulose composite material is post-treated, and the post-treatment steps are as follows: get agar and deionized water, according to the mass ratio of 2:98, while Heating to 95°C while stirring, so that agar and deionized water form a transparent mixed solution; then immerse the carbon nanotube/cellulose composite in the transparent mixed solution, and shake the carbon nanotubes back and forth along the direction of the unidirectionally oriented holes. The tube/cellulose composite material was shaken back and forth at a rate of 10 cm/s for 2.5 hours to allow the agar solution to fully enter the carbon nanotube/cellulose composite material, and then the carbon nanotube/cellulose composite material was taken out and cooled to room temperature.

The long-lasting fragrance regenerated cellulose fiber of the above-mentioned examples 1-9 still has a relatively strong fragrance after being stored for 3 months, and after repeated washing and rubbing, the fragrance still exists.

It should be noted that the above embodiments are only some specific implementation methods of the present invention, and are not intended to limit the patent scope of the present invention. The regenerated cellulose fiber with long-lasting fragrance prepared by the invention can be directly used to prepare clothing fabrics, and can also be blended with other fibers to make long-lasting antibacterial clothing fabrics. Therefore, any equivalent structure or equivalent process transformation made by using the content of the description of the present invention, or directly or indirectly used in other related technical fields, is also included in the scope of patent protection of the present invention.

Claims (10)

1. A long-acting fragrance-retaining regenerated cellulose fiber, the preparation steps of which mainly include: step 1, after bamboo chips are air-dried, immersed in water for pre-hydrolysis, and then beating, pulp washing, bleaching, neutralization, and removal after secondary cooking Obtain regenerated bamboo cellulose after mixing, pulping and drying; step 2, disperse the regenerated bamboo cellulose obtained in step 1 in the cellulose solvent, apply stirring or mechanical kneading while heating, until the cellulose is completely dissolved, Obtain a uniform and transparent cellulose homogeneous solution; Step 3, ultrasonically disperse the carbon nanotubes and guanidine carbonate in water, then add to the cellulose homogeneous solution prepared in Step 2, stir and mix evenly; Step 4, prepare in Step 3 The obtained mixed solution is poured into a metal container, and unidirectionally frozen to obtain a cellulose frozen block; step 5, the cellulose frozen block obtained in step 4 is put into a vacuum freeze dryer, and vacuum freeze-dried to obtain a cellulose block with a unidirectional orientation. Porous carbon nanotube/cellulose composite material; step 6, immerse the carbon nanotube/cellulose composite material prepared in step 5 in the solution containing spices, and shake the carbon nanotube back and forth along the direction of the unidirectional directional hole /cellulose composite material, make the solution containing perfume fully enter in the carbon nanotube/cellulose composite material, then take out the carbon nanotube/cellulose composite material, and dry at room temperature. 2. The long-acting fragrance-retaining regenerated cellulose fiber according to claim 1, characterized in that: in step 1, the bamboo chips are water bamboo, moso bamboo, and four-season bamboo, and the molecular weight of the obtained regenerated bamboo cellulose is 5 ×10 ⁴ to 1×10 ⁵ . 3. The regenerated cellulose fiber with long-lasting fragrance according to claim 1, characterized in that: in step 2, the heating temperature is 60-80°C, and the mass fraction of the regenerated bamboo cellulose in the cellulose solvent is It is 25-45%wt. 4. The long-acting fragrance-retaining regenerated cellulose fiber according to claim 1, characterized in that: in step 2, the cellulose solvent is mainly N-methylmorpholine oxide aqueous solution, 1-butyl-chloride One or both of 3-methylimidazolium salt aqueous solutions, wherein the mass fraction of the N-methylmorpholine oxide or 1-butyl-3-methylimidazolium chloride in the aqueous solution is 5-15 %wt. 5. The regenerated cellulose fiber with long-lasting fragrance according to claim 1, characterized in that: in step 3, the mass fractions of carbon nanotubes and guanidine carbonate in water are 15-30%wt and 1-5%wt respectively , the mass ratio of the water to the homogeneous cellulose solution is 10-25%. 6. The regenerated cellulose fiber with long-lasting fragrance according to claim 1, characterized in that: in step 4, the one-way freezing is implemented by moving the end of the metal container to the cold trap at a constant speed , the temperature of the cold trap is -20 to -40°C, and the constant speed is -0.5 to 5mm/min. 7. The long-lasting fragrance regenerated cellulose fiber according to claim 1, characterized in that: in step 4, the one-way freezing is implemented by maintaining the bottom of the metal container at a constant temperature, and the constant temperature It is -40～-80°C. 8. The regenerated cellulose fiber with long-lasting fragrance according to claim 1, characterized in that in step 5, the temperature in the vacuum freeze dryer is -30--20°C, and the vacuum degree is 1-10Pa. 9. The long-acting fragrance-retaining regenerated cellulose fiber according to claim 1, characterized in that: in step 6, the fragrance-containing solution is mainly 8-18%wt essence, 0.5-2.5wt% directional agent, 0.2 It is composed of ~1wt% surfactant, 0.1~0.5%wt sodium chloride, and the balance of deionized water, and the soaking time is 2~10h. 10. The regenerated cellulose fiber with long-lasting fragrance according to claim 1, characterized in that: the carbon nanotube/cellulose composite material treated in step 6 is immersed in a transparent agar solution at 80-95°C, Shake the carbon nanotube/cellulose composite material back and forth in the direction of the oriented holes, so that the agar solution fully enters the carbon nanotube/cellulose composite material, the content of the agar is 0.5-2%wt, and then take it out and cool to normal temperature .