CN106381542B - Preparation method of lotus leaf carbon nano material regenerated cellulose blend fiber - Google Patents
Preparation method of lotus leaf carbon nano material regenerated cellulose blend fiber Download PDFInfo
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- CN106381542B CN106381542B CN201610821530.1A CN201610821530A CN106381542B CN 106381542 B CN106381542 B CN 106381542B CN 201610821530 A CN201610821530 A CN 201610821530A CN 106381542 B CN106381542 B CN 106381542B
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 7
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- 229960001763 zinc sulfate Drugs 0.000 claims description 6
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/02—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from solutions of cellulose in acids, bases or salts
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/103—Agents inhibiting growth of microorganisms
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The invention discloses a preparation method of a lotus leaf carbon nano material regenerated cellulose blend fiber, which is characterized by comprising the following steps: the preparation method comprises the following preparation steps: (1) preparing a high-performance lotus leaf carbon nano material by taking lotus leaves as a raw material; (2) mixing the lotus leaf carbon nano material with regenerated cellulose spinning solution; (3) and spinning the blended spinning solution through wet spinning equipment, and forming fibers through a coagulating bath to prepare the lotus leaf carbon nano material regenerated cellulose blended fibers. The raw material source of the invention is rich, the cost is low, the preparation process is simple, no pollution is caused, the quantitative production can be realized, the prepared lotus leaf carbon nano material regenerated cellulose blend fiber has good antibacterial, adsorption and deodorization effects, and the added value is higher compared with the common regenerated cellulose.
Description
Technical Field
The invention belongs to the technical field of preparation of blend regenerated cellulose, and particularly relates to a preparation method of a lotus leaf carbon nano material regenerated cellulose blend fiber.
Background
The regenerated fiber is a chemical fiber which is made from natural polymer through a chemical method and has basically the same chemical composition with the original polymer. Due to the characteristics of softness, comfort, air permeability and environmental protection of the regenerated cellulose fiber, the woven clothes are favored by consumers all over the world. Due to the reduction of cultivated land and the increasing exhaustion of petroleum resources, the yield of natural fibers and synthetic fibers is increasingly restricted; people reckon and discover the value of the regenerated cellulose fiber while paying attention to the environmental protection performance in the consumption process of the textile.
Lotus leaf is also called lotus flower stem and lotus stem. The lotus leaves have a plurality of minute papillae on the surface, the average size is about 10 microns, the average spacing is about 12 microns, and each papillae is composed of a plurality of protrusions with the diameter of about 200 nanometers. The nanometer structure is added on the micrometer structure, countless small mountains distributed with dense hemp are formed on the surface of the lotus leaf, the valley between the small mountains is narrow, small water drops can only run between the mountain heads, and the lotus leaf is not drilled into the lotus leaf, so the lotus leaf has hydrophobic property. The lotus leaves have basic chemical components of carbohydrate of polysaccharides such as chlorophyll, cellulose, starch and the like, have rich polar groups such as hydroxyl OH-, amino NH-and the like, can easily adsorb water or stains in natural environment, but have extremely strong water repellency, water sprayed on the leaf surfaces can automatically gather into water drops, the rolling of the water drops can stick and suck dust and sludge falling on the leaf surfaces to roll out of the leaf surfaces, so that the leaf surfaces are always kept clean, and the lotus leaf self-cleaning effect is known.
The lotus leaf silk fiber is a novel environment-friendly natural cellulose fiber, is a fiber extracted from agricultural waste lotus stalks, is also called lotus fiber, is super-hydrophobic and self-cleaning, and can be used without adding a finishing process for reducing surface friction or water repellency in fabric after-finishing. The lotus leaf silk fiber has the characteristics of typical plant fiber, is composed of components such as polysaccharide substances, lignin and the like, has main components of cellulose and smaller crystallinity, and is an extremely ideal precursor of nano fibrillated cellulose; the lotus leaf silk fiber belongs to high-strength low-elongation fiber, has larger initial modulus and breaking strength and smaller breaking elongation, the emergent elastic deformation of the fiber is close to the total deformation in a small stress state, which shows that the elasticity of the fiber is better in the small stress state, the lotus leaf silk fiber is a novel environment-friendly green textile raw material, the fiber can release a unique natural fragrant smell and can release the fragrance for a long time to become an excellent textile raw material, therefore, the lotus leaf natural environment-friendly biomass resource is developed and utilized to play the unique functional characteristics of the lotus leaf silk fiber, and the lotus leaf silk fiber is expected to become an ideal raw material for manufacturing novel nano materials.
Blended fibers, also known as multicomponent fibers, refer to chemical fibers that are spun by blending two or more polymers. Most blended fibers are embedded in a matrix of one polymer with fibrils of another polymer, and are also known as matrix-fibril type fibers. Blend fibers while the way of blending and the use are very different, most of them want to combine the excellent properties of each component polymer by blending to obtain a new fiber superior to the properties of single component fibers. The blending and melt spinning can obtain various functional fibers with high added values by slightly adjusting the original equipment and process, and saves the equipment investment and the capital for technical transformation, so the blending and melt spinning is widely adopted by the industry at present. However, there is no method in the prior art for combining lotus leaves with regenerated cellulose to produce a blended fiber with better performance.
Disclosure of Invention
In order to overcome the defects and defects of the prior art, the invention provides a preparation method of the lotus leaf carbon nano material regenerated cellulose blend fiber, and the lotus leaf carbon nano material regenerated cellulose blend fiber prepared by the method is a novel functional fiber and has ideal antibacterial, adsorption and deodorization effects.
A preparation method of a lotus leaf carbon nano material regenerated cellulose blend fiber comprises the following preparation steps:
(1) preparing a high-performance lotus leaf carbon nano material by taking lotus leaves as a raw material;
(2) mixing the lotus leaf carbon nano material with a regenerated cellulose spinning solution: dispersing a lotus leaf carbon nano material in water or an alcohol solvent, performing mechanical shearing or ultrasonic dispersion treatment for 1-3 hours to prepare a lotus leaf carbon nano material dispersion liquid with the mass fraction of 1-10%, then adding the lotus leaf carbon nano material dispersion liquid into a regenerated cellulose spinning solution by a dropwise blending method, and performing high-speed shearing blending to prepare a uniformly mixed blending spinning solution;
(3) and spinning the blended spinning solution through wet spinning equipment, and forming fibers through a coagulating bath to prepare the lotus leaf carbon nano material regenerated cellulose blended fibers.
Further, the preparation method of the lotus leaf carbon nano material in the step (1) comprises the following steps: collecting folium Nelumbinis, removing impurities, cleaning, freeze drying, pulverizing, and sieving to obtain 50-100 mesh folium Nelumbinis powder; calcining the lotus leaf powder to black in an inert gas atmosphere at the temperature of 200-800 ℃, wherein the calcining time is 30-60min, and obtaining a pre-carbonized product; adding an active agent into the pre-carbonized product, and stirring for 4-10h at the temperature of 30-50 ℃ and the stirring speed of 50-300r/min to obtain a precursor; drying the precursor at 50-100 ℃ for 6-12h to obtain an intermediate product; carrying out heat treatment on the intermediate product to obtain a product I; treating the product I by an acid leaching method, washing the product I to be neutral by distilled water, and finally drying the product I for 6-10h at the temperature of 60-150 ℃ or drying the product I for 6-10h at the temperature of 40-80 ℃ under the vacuum condition to obtain the lotus leaf carbon nano material with the particle size of 50-1000 nm.
Preferably, the inert gas is one of nitrogen or argon.
Preferably, the active agent is one of potassium permanganate or phosphorus pentoxide.
Preferably, the addition ratio of the pre-carbonized product to the active agent is 1: 1-5.
Preferably, the heat treatment is carried out under the conditions that the temperature is raised to 600-1400 ℃ at the temperature raising rate of 10-20 ℃/min and the heating is carried out for 0.5-6h under the inert gas flow of 30-200 mL/min.
Preferably, 10-30% hydrochloric acid or 30-60% sulfuric acid is used in the acid leaching process.
Further, in the step (2), the regenerated cellulose spinning solution comprises the following components in percentage by weight: 5-9% of type A cellulose, 4-7% of sodium hydroxide and the balance of water; the solid content ratio of the lotus leaf carbon nano material to the A-type cellulose in the blended spinning solution is 1: 9-1000, the viscosity of the blended spinning solution is 25-75s, and the maturity is 7-25 mL.
Further, in the step (3), the coagulating bath comprises a bath and two baths, wherein the bath is carried out at 30-55 ℃ under the conditions of 70-140g/L sulfuric acid, 250-360g/L sodium sulfate and 5-30g/L zinc sulfate, and the bath is carried out at 90-100 ℃ under the condition of 8-22g/L sulfuric acid.
Further, the dry breaking strength of the lotus leaf carbon nano material regenerated cellulose blend fiber is 1.8-2.8cN/dtex, the wet breaking strength is 0.9-1.4cN/dtex, the dry breaking elongation is 15-20%, the bacteriostasis rate to staphylococcus aureus and escherichia coli is more than 90%, and the degradation rate to formaldehyde, oxynitride and ammonia gas is more than 85%.
Compared with the prior art, the invention has the advantages and positive effects that:
1. the invention directly takes the lotus leaves as the raw material, which is beneficial to protecting the environment, improves the utilization rate of the lotus leaves, realizes the reutilization of waste biomass, changes waste into valuable, reduces the production cost, meets the national requirement of vigorously developing new regenerated biomass materials, and improves the economic, social and ecological benefits of the lotus leaves.
2. The lotus leaf has the advantages of wide raw material source, low raw material cost, environmental protection, green, high safety, biodegradability, good biocompatibility, no environmental pollution, better reasonable utilization of high-quality lotus leaf resources, and wide application prospect in the fields of biological medicine, textile and the like.
3. The lotus leaf carbon nano material regenerated cellulose blend fiber prepared by the method has the dry breaking strength of 1.8-2.8cN/dtex, the wet breaking strength of 0.9-1.4cN/dtex, the dry breaking elongation of 15-20%, the bacteriostasis rate to staphylococcus aureus and escherichia coli of more than 90%, and the degradation rate to formaldehyde, oxynitride and ammonia gas of more than 85%, has ideal antibacterial, adsorption and deodorization effects, and belongs to a high value-added product.
4. The lotus leaf carbon nano material regenerated cellulose blend fiber prepared by the invention is a novel functional fiber, and belongs to a brand new functional fiber.
In conclusion, the raw materials of the invention have rich sources, low cost, simple preparation process, no pollution and quantitative production, and the prepared lotus leaf carbon nano material regenerated cellulose blend fiber has good antibacterial, adsorption and deodorization effects and higher added value compared with common regenerated cellulose.
Detailed Description
The technical solutions of the present invention are described below clearly and completely with reference to the specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a preparation method of a lotus leaf carbon nano material regenerated cellulose blend fiber, which comprises the following preparation steps:
(1) the preparation method comprises the following steps of preparing a high-performance lotus leaf carbon nano material by taking lotus leaves as raw materials: picking lotus leaves, removing impurities, cleaning, freeze-drying, crushing and sieving to obtain 100-mesh lotus leaf powder; calcining the lotus leaf powder to black in a nitrogen atmosphere at 200 ℃ for 60min to obtain a pre-carbonized product; adding potassium permanganate into the pre-carbonized product according to the weight ratio of 1: 1, and stirring for 4 hours under the conditions that the temperature is 50 ℃ and the stirring speed is 50r/min to obtain a precursor; drying the precursor for 6h at 50 ℃ to obtain an intermediate product; carrying out heat treatment on the intermediate product to obtain a product I, wherein the heat treatment condition is that the temperature is raised to 600 ℃ at the temperature rise rate of 10 ℃/min, and then the intermediate product is heated for 0.5h under the inert gas flow of 30 mL/min; and (3) treating the product I by using 10-30% hydrochloric acid through an acid leaching method, washing the product I to be neutral by using distilled water, and finally drying the product I for 10 hours at the temperature of 60 ℃ to obtain the lotus leaf carbon nano material with the particle size of 1000 nm.
(2) Mixing the lotus leaf carbon nano material with a regenerated cellulose spinning solution: dispersing a lotus leaf carbon nano material in water or an alcohol solvent, performing mechanical shearing or ultrasonic dispersion treatment for 1h to prepare a lotus leaf carbon nano material dispersion liquid with the mass fraction of 1%, then adding the lotus leaf carbon nano material dispersion liquid into a regenerated cellulose spinning solution by a dropwise blending method, wherein the regenerated cellulose spinning solution contains 5% of A-type cellulose and 4% of sodium hydroxide, and the solvent is water; the blended spinning solution which is uniformly mixed is prepared by high-speed shearing and blending, the solid content ratio of the lotus leaf carbon nano material to the A-type cellulose in the blended spinning solution is 1: 99, the viscosity of the blended spinning solution is 25s, and the maturity is 25mL (10% NH)4Cl)。
(3) And spinning the blended spinning solution through wet spinning equipment, and forming fibers through a coagulating bath to prepare the lotus leaf carbon nano material regenerated cellulose blended fibers. The coagulation bath conditions were 70g/L sulfuric acid, 250g/L sodium sulfate, 5g/L zinc sulfate at 30 ℃ for one bath, and 8g/L sulfuric acid at 90 ℃ for two baths. The coagulating bath is capable of coagulating or simultaneously chemically altering the fine stream of the spinning colloidal solution passing through the spinneret to form fibers, and the sulfuric acid in the coagulating bath neutralizes the sodium hydroxide in the co-mingled spinning solution. The obtained lotus leaf carbon nano material regenerated cellulose blend fiber contains 1% of lotus leaf carbon nano material and 99% of A-type cellulose, the dry breaking strength of the lotus leaf carbon nano material regenerated cellulose blend fiber is 1.8cN/dtex, the wet breaking strength is 0.9cN/dtex, the dry breaking elongation is 15%, the bacteriostasis rate on staphylococcus aureus and escherichia coli is 90%, and the degradation rate on formaldehyde, oxynitride and ammonia gas is 85%, so that the lotus leaf carbon nano material regenerated cellulose blend fiber has ideal antibacterial, adsorption and deodorization effects.
Example 2
Different from the embodiment 1, the preparation method of the lotus leaf carbon nano material regenerated cellulose blend fiber comprises the following preparation steps:
(1) the preparation method comprises the following steps of preparing a high-performance lotus leaf carbon nano material by taking lotus leaves as raw materials: picking lotus leaves, removing impurities, cleaning, freeze-drying, crushing and sieving to obtain 50-mesh lotus leaf powder; calcining the lotus leaf powder to black in an argon atmosphere at 800 ℃ for 60min to obtain a pre-carbonized product; adding phosphorus pentoxide into the pre-carbonized product according to the weight ratio of 1: 5, and stirring for 10h under the conditions that the temperature is 50 ℃ and the stirring speed is 300r/min to obtain a precursor; drying the precursor for 12h at 100 ℃ to obtain an intermediate product; carrying out heat treatment on the intermediate product to obtain a product I, wherein the heat treatment condition is that the temperature is raised to 1400 ℃ at the temperature rise rate of 20 ℃/min, and then the intermediate product is heated for 6h under the inert gas flow of 200 mL/min; and (3) treating the product I by using 30-60% sulfuric acid through an acid leaching method, washing the product I to be neutral by using distilled water, and finally drying the product I for 6 hours at 80 ℃ under a vacuum condition to obtain the lotus leaf carbon nano material with the particle size of 50 nm.
(2) Mixing the lotus leaf carbon nano material with a regenerated cellulose spinning solution: dispersing a lotus leaf carbon nano material in water or an alcohol solvent, performing mechanical shearing or ultrasonic dispersion treatment for 3 hours to prepare a lotus leaf carbon nano material dispersion liquid with the mass fraction of 10%, then adding the lotus leaf carbon nano material dispersion liquid into a regenerated cellulose spinning solution by a dropwise blending method, wherein the regenerated cellulose spinning solution contains 9% of A-type cellulose and 7% of sodium hydroxide, and the solvent is water; via high speed shearingMixing to prepare a uniformly mixed blending spinning solution, wherein the solid content ratio of the lotus leaf carbon nano material to the alpha-cellulose in the blending spinning solution is 1: 9, the viscosity of the blending spinning solution is 75s, and the maturity is 25mL (10% NH)4Cl)。
(3) And spinning the blended spinning solution through wet spinning equipment, and forming fibers through a coagulating bath to prepare the lotus leaf carbon nano material regenerated cellulose blended fibers. The coagulation bath conditions were one bath at 55 ℃ under 140g/L sulfuric acid, 360g/L sodium sulfate, 30g/L zinc sulfate, and two baths at 100 ℃ under 22g/L sulfuric acid. The obtained lotus leaf carbon nano material regenerated cellulose blend fiber contains 10% of lotus leaf carbon nano material and 90% of A-type cellulose, the dry breaking strength of the lotus leaf carbon nano material regenerated cellulose blend fiber is 2.8cN/dtex, the wet breaking strength is 1.4cN/dtex, the dry breaking elongation is 20%, the bacteriostasis rate on staphylococcus aureus and escherichia coli is 95%, and the degradation rate on formaldehyde, oxynitride and ammonia gas is 90%, so that the lotus leaf carbon nano material regenerated cellulose blend fiber has ideal antibacterial, adsorption and deodorization effects.
Example 3
Different from the embodiment 1, the preparation method of the lotus leaf carbon nano material regenerated cellulose blend fiber comprises the following preparation steps:
(1) the preparation method comprises the following steps of preparing a high-performance lotus leaf carbon nano material by taking lotus leaves as raw materials: picking lotus leaves, removing impurities, cleaning, freeze-drying, crushing and sieving to obtain 70-mesh lotus leaf powder; calcining the lotus leaf powder to black in an argon atmosphere at 650 ℃ for 30min to obtain a pre-carbonized product; adding phosphorus pentoxide into the pre-carbonized product according to the weight ratio of 1: 3, and stirring for 8 hours at the temperature of 30 ℃ and the stirring speed of 250r/min to obtain a precursor; drying the precursor for 10 hours at the temperature of 85 ℃ to obtain an intermediate product; carrying out heat treatment on the intermediate product to obtain a product I, wherein the heat treatment condition is that the temperature is raised to 1000 ℃ at the temperature rise rate of 15 ℃/min, and then the intermediate product is heated for 3h under the inert gas flow of 100 mL/min; and (3) treating the product I by using 48% sulfuric acid through an acid leaching method, washing the product I to be neutral by using distilled water, and finally drying the product I for 6 hours at the temperature of 150 ℃ to obtain the 400nm lotus leaf carbon nano material.
(2) Mixing the lotus leaf carbon nano material with a regenerated cellulose spinning solution: dispersing a lotus leaf carbon nano material in water or an alcohol solvent, performing mechanical shearing or ultrasonic dispersion treatment for 2 hours to prepare a lotus leaf carbon nano material dispersion liquid with the mass fraction of 6%, then adding the lotus leaf carbon nano material dispersion liquid into a regenerated cellulose spinning solution by a dropwise blending method, wherein the regenerated cellulose spinning solution contains 6% of A-type cellulose and 5% of sodium hydroxide, and the solvent is water; the blended spinning solution which is uniformly mixed is prepared by high-speed shearing and blending, the solid content ratio of the lotus leaf carbon nano material to the A-type cellulose in the blended spinning solution is 1: 10, the viscosity of the blended spinning solution is 25s, and the maturity is 7mL (10% NH)4Cl)。
(3) And spinning the blended spinning solution through wet spinning equipment, and forming fibers through a coagulating bath to prepare the lotus leaf carbon nano material regenerated cellulose blended fibers. The coagulation bath conditions were 100g/L sulfuric acid, 300g/L sodium sulfate, 20g/L zinc sulfate at 40 ℃ for one bath, and 16g/L sulfuric acid at 94 ℃ for two baths. The obtained lotus leaf carbon nano material regenerated cellulose blend fiber contains 9.1% of lotus leaf carbon nano material and 90.1% of A-type cellulose, the dry breaking strength of the lotus leaf carbon nano material regenerated cellulose blend fiber is 2.3cN/dtex, the wet breaking strength is 1.1cN/dtex, the dry breaking elongation is 17%, the antibacterial rate on staphylococcus aureus and escherichia coli is 91%, and the degradation rate on formaldehyde, oxynitride and ammonia gas is 88%, so that the lotus leaf carbon nano material regenerated cellulose blend fiber has ideal antibacterial, adsorption and deodorization effects.
Example 4
Different from the embodiment 1, the preparation method of the lotus leaf carbon nano material regenerated cellulose blend fiber comprises the following preparation steps:
(1) the preparation method comprises the following steps of preparing a high-performance lotus leaf carbon nano material by taking lotus leaves as raw materials: picking lotus leaves, removing impurities, cleaning, freeze-drying, crushing and sieving to obtain 85-mesh lotus leaf powder; calcining the lotus leaf powder to black in an argon atmosphere at 500 ℃ for 45min to obtain a pre-carbonized product; adding potassium permanganate into the pre-carbonized product according to the weight ratio of 1: 4.5, and stirring for 8 hours at the temperature of 30 ℃ and the stirring speed of 250r/min to obtain a precursor; drying the precursor for 11h at 65 ℃ to obtain an intermediate product; carrying out heat treatment on the intermediate product to obtain a product I, wherein the heat treatment condition is that the temperature is raised to 800 ℃ at the temperature rise rate of 13 ℃/min, and then the intermediate product is heated for 4.5h under the inert gas flow of 150 mL/min; and (3) treating the product I by using 20% hydrochloric acid through an acid leaching method, washing the product I to be neutral by using distilled water, and finally drying the product I for 10 hours at 40 ℃ under a vacuum condition to obtain a 650nm lotus leaf carbon nano material.
(2) Mixing the lotus leaf carbon nano material with a regenerated cellulose spinning solution: dispersing a lotus leaf carbon nano material in water or an alcohol solvent, performing mechanical shearing or ultrasonic dispersion treatment for 2 hours to prepare lotus leaf carbon nano material dispersion liquid with the mass fraction of 8%, then adding the lotus leaf carbon nano material dispersion liquid into regenerated cellulose spinning solution by a dropwise blending method, wherein the regenerated cellulose spinning solution contains 8% of A-type cellulose and 6% of sodium hydroxide, and the solvent is water; the blended spinning solution which is uniformly mixed is prepared by high-speed shearing and blending, the solid content ratio of the lotus leaf carbon nano material to the A-type cellulose in the blended spinning solution is 1: 1000, the viscosity of the blended spinning solution is 35s, and the maturity is 18mL (10% NH)4Cl)。
(3) And spinning the blended spinning solution through wet spinning equipment, and forming fibers through a coagulating bath to prepare the lotus leaf carbon nano material regenerated cellulose blended fibers. The coagulation bath conditions were 115g/L sulfuric acid, 320g/L sodium sulfate, 25g/L zinc sulfate at 45 ℃ for one bath, and 19g/L sulfuric acid at 95 ℃ for two baths. The obtained lotus leaf carbon nano material regenerated cellulose blend fiber contains 0.1% of lotus leaf carbon nano material and 99.9% of A-type cellulose, the dry breaking strength of the lotus leaf carbon nano material regenerated cellulose blend fiber is 2.5cN/dtex, the wet breaking strength is 1.2cN/dtex, the dry breaking elongation is 18%, the antibacterial rate on staphylococcus aureus and escherichia coli is 93%, and the degradation rate on formaldehyde, oxynitride and ammonia gas is 86%, so that the lotus leaf carbon nano material regenerated cellulose blend fiber has ideal antibacterial, adsorption and deodorization effects.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (7)
1. A preparation method of a lotus leaf carbon nano material regenerated cellulose blend fiber is characterized by comprising the following steps: the preparation method comprises the following preparation steps:
(1) the preparation method of the high-performance lotus leaf carbon nano material by using lotus leaves as raw materials comprises the following steps: collecting folium Nelumbinis, removing impurities, cleaning, freeze drying, pulverizing, and sieving to obtain 50-100 mesh folium Nelumbinis powder; calcining the lotus leaf powder to black in an inert gas atmosphere at the temperature of 200-800 ℃, wherein the calcining time is 30-60min, and obtaining a pre-carbonized product; adding an active agent into the pre-carbonized product, and stirring for 4-10h at the temperature of 30-50 ℃ and the stirring speed of 50-300r/min to obtain a precursor; drying the precursor at 50-100 ℃ for 6-12h to obtain an intermediate product; carrying out heat treatment on the intermediate product to obtain a product I; treating the product I by acid leaching method, washing with distilled water to neutrality, and drying at 60-150 deg.C for 6-10h or at 40-80 deg.C under vacuum condition for 6-10h to obtain 50-1000nm lotus leaf carbon nanometer material;
(2) mixing the lotus leaf carbon nano material with a regenerated cellulose spinning solution: dispersing a lotus leaf carbon nano material in water or an alcohol solvent, performing mechanical shearing or ultrasonic dispersion treatment for 1-3 hours to prepare a lotus leaf carbon nano material dispersion liquid with the mass fraction of 1-10%, then adding the lotus leaf carbon nano material dispersion liquid into a regenerated cellulose spinning solution by a drop-by-drop blending method, and preparing a uniformly mixed blended spinning solution by high-speed shearing and blending, wherein the regenerated cellulose spinning solution comprises the following components in percentage by weight: 5-9% of type A cellulose, 4-7% of sodium hydroxide and the balance of water; the solid content ratio of the lotus leaf carbon nano material to the A-type cellulose in the blended spinning solution is 1: 9-1000, the viscosity of the blended spinning solution is 25-75s, and the maturity is 7-25 mL;
(3) spinning the blended spinning solution through a wet spinning device, and forming fibers through a coagulating bath to prepare the lotus leaf carbon nano material regenerated cellulose blended fibers, wherein the coagulating bath comprises one bath and two baths, the one bath is carried out at the temperature of 30-55 ℃ under the conditions of 70-140g/L of sulfuric acid, 250-360g/L of sodium sulfate and 5-30g/L of zinc sulfate, and the two baths are carried out at the temperature of 90-100 ℃ under the condition of 8-22g/L of sulfuric acid.
2. The preparation method of the lotus leaf carbon nanomaterial regenerated cellulose blend fiber according to claim 1, characterized in that: the inert gas is one of nitrogen or argon.
3. The preparation method of the lotus leaf carbon nanomaterial regenerated cellulose blend fiber according to claim 2, characterized in that: the active agent is one of potassium permanganate or phosphorus pentoxide.
4. The preparation method of the lotus leaf carbon nanomaterial regenerated cellulose blend fiber according to claim 3, characterized in that: the adding ratio of the pre-carbonized product to the active agent is 1: 1-5.
5. The preparation method of the lotus leaf carbon nanomaterial regenerated cellulose blend fiber according to claim 4, characterized in that: the heat treatment conditions are that the temperature is raised to 600 ℃ and 1400 ℃ at the temperature raising rate of 10-20 ℃/min, and the heating is carried out for 0.5-6h at the inert gas flow rate of 30-200 mL/min.
6. The preparation method of the lotus leaf carbon nanomaterial regenerated cellulose blend fiber according to claim 5, characterized in that: 10-30% hydrochloric acid or 30-60% sulfuric acid is adopted in the acid leaching method.
7. The method for preparing the lotus leaf carbon nanomaterial regenerated cellulose blend fiber according to any one of claims 1 to 6, characterized in that: the lotus leaf carbon nano material regenerated cellulose blend fiber has dry breaking strength of 1.8-2.8cN/dtex, wet breaking strength of 0.9-1.4cN/dtex, dry breaking elongation of 15-20%, bacteriostasis rate on staphylococcus aureus and escherichia coli of more than 90%, and degradation rate on formaldehyde, oxynitride and ammonia gas of more than 85%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH02228332A (en) * | 1989-03-01 | 1990-09-11 | Toray Ind Inc | Ion-exchange fiber and preparation thereof |
| CN104264258A (en) * | 2014-10-15 | 2015-01-07 | 钱景 | Functional salix psammophila regenerated cellulose fiber and preparation method thereof |
| CN104414286A (en) * | 2013-08-28 | 2015-03-18 | 青岛医防消毒专业技术中心 | Lotus fibrous protein quilt |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02228332A (en) * | 1989-03-01 | 1990-09-11 | Toray Ind Inc | Ion-exchange fiber and preparation thereof |
| CN104414286A (en) * | 2013-08-28 | 2015-03-18 | 青岛医防消毒专业技术中心 | Lotus fibrous protein quilt |
| CN104264258A (en) * | 2014-10-15 | 2015-01-07 | 钱景 | Functional salix psammophila regenerated cellulose fiber and preparation method thereof |
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