CN106521674A - Application of carbon dots in preparation of ultraviolet-proof product - Google Patents
Application of carbon dots in preparation of ultraviolet-proof product Download PDFInfo
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- CN106521674A CN106521674A CN201611031042.7A CN201611031042A CN106521674A CN 106521674 A CN106521674 A CN 106521674A CN 201611031042 A CN201611031042 A CN 201611031042A CN 106521674 A CN106521674 A CN 106521674A
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- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/14—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated alcohols, e.g. polyvinyl alcohol, or of their acetals or ketals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/0241—Containing particulates characterized by their shape and/or structure
- A61K8/0245—Specific shapes or structures not provided for by any of the groups of A61K8/0241
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
- A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
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- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
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- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- 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
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
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Abstract
The invention discloses application of carbon dots in preparation of an ultraviolet-proof product, wherein the ultraviolet-proof product can be fibers, cosmetics, coatings, ink or resin. The ultraviolet-proof product prepared from the carbon dots has the advantages of obvious effect of absorbing UVA and UVB, low production cost, safety (no toxicity), stability (difficult decomposition) and the like.
Description
Technical field
The present invention relates to a kind of new application of carbon point, specifically, be carbon point as UV absorbent, preparing anti-ultraviolet
Application in product.
Background technology
UV (ultraviolet) is the light wave that a kind of mankind cannot see, its wave-length coverage between 200nm～400nm, ground
The ultraviolet for receiving is mainly UVA (black speck ultraviolet, wavelength is between 320～400nm) and UVB (erythema ultraviolet, wavelength
Between 280～320nm), these UV radiation causes the deterioration of industrial products, and being hardened for such as plastic material is easily split, rubber
Hardening become fragile, the discoloration of coating etc., and cause very important damage to human skin, therefore develop UV absorption spectras
Wide, the UV absorbent of good stability become the joint demand of industrial development and daily life.
Traditional UV absorbent mainly include salicylic acid esters, benzophenone class, benzotriazole, group-substituted acrylonitrile, triazine
Class and hindered amines, three primary colors fluorescent powder, LED fluorescent material, fluoride system, aluminates system, silicate systems and sulfuration
Objects system etc..But, there is many defects in traditional UV absorbent：1st, macromolecule organic material mostly is, it is multiplex in building-up process
To toxicity raw material, such as benzene class etc., exist in being added to finished product of terminal company unavoidably toxicity raw material or toxicity intermediate product, UV inhales
Receive agent to be present in people's daily life and often in contact with the product for arriving, such as cosmetics, synthetic fibers etc. as a kind of, directly or
The health and safety of people is endangered indirectly；2nd, traditional UV absorbent mostly are single UV absorbent, absorb ultraviolet POP model
Enclose also corresponding relatively simple, it is or mainly absorbing UVA, or being mainly to absorb UVB, only various mixed could to realize while suction
The effect of UVA and UVB is received, the UV absorbent manufacturing process of Compositional type is complicated；3rd, traditional UV absorbent cost intensives, market are put down
Price occupies the larger additive cost payout ratio of industrial products in 50-80 units/kg；4th, the transparency of product is affected,
Limit the use range of UV absorbent；5th, poor compatibility, is applied to being limited in scope in other materials.
Carbon point (Carbon Dots, CDs), also known as carbon quantum dot, fluorescent carbon point etc., is occurred in recent years a kind of new
Fluorescent carbon nano-particles.2006, Sun Ya equalitys (Cao L, Wang X, Meziani M J, et al.Carbon dots for
multiphoton bioimaging[J].Journal of the American Chemical Society,2007,129
(37):The mixture for 11318-11319.) passing through hot pressing powdered graphite and binding agent prepares carbon target, then carries out laser ablation, makes
For the carbon nano-particles of unstressed configuration performance are gone out, then through nitric acid reflux oxidation, PEG1500N or 4,7,10- trioxa -1,13-
Tridecane diamine (TTDDA) carries out surface passivation, obtains the preferable carbon nano-particles of fluorescence property, and is called carbon point first.
Carbon point, is a kind of zero-dimensional semiconductor nanocrystal of almost spherical and diameter less than 10nm, is made up of few molecule or atom
Nanocluster, the particle diameter of carbon point typically only has several nanometers, much smaller than common quantum dot, generally basic by tetra- kinds of C, H, O, N
It is elementary composition.Carbon point absorbs relatively strong in ultraviolet region spectrum, and absorption region may extend to visible region, Jing after exciting, can produce
Luminescence generated by light phenomenon, that is, launch fluorescence.In view of the hypotoxicity and biocompatibility of carbon point, carbon point be mainly used at present it is biological into
In picture and biomarker field.As some researchs show, in some carriers, such as in synthetic rubber, directly addition carbon point is
Without any UV assimilation effects, it is mainly shown as：Carrier is incompatible with carbon point, therefore limits the range of application of carbon point.
The content of the invention
It is an object of the invention to provide a kind of new application of carbon point, with solve the above problems at least one.
According to an aspect of the present invention, the invention provides application of the carbon point in anti-ultraviolet product is prepared.
Wherein, anti-ultraviolet product is fiber, cosmetics, coating, ink or resin.Fiber is vinal or carboxylic
Sodium carboxymethylcellulose pyce；Cosmetics are ultra light sun block lotion or sunscreen cream；Coating is oil paint or water paint；Ink is water color ink or purple
Outer light-curable ink；Resin is LED encapsulating epoxy resins or organic siliconresin..
In the present invention, it is added directly in fiber, cosmetics, resin, coating or ink by the carbon point by preparation, you can
Anti-ultraviolet product is prepared, being thoroughly mixed to make carbon point be dispersed in the raw material for preparing product, it is to avoid carbon
The agglomeration of point.
The present invention is prepared into UV resistance product by carbon point is added in raw material, and prepared anti-ultraviolet product has
Wider uv absorption scope, can absorb UVA and UVB simultaneously.Fiber, cosmetics, painting are added to by the carbon point by the preparation
In material, ink or resin, make product that there is the effect for absorbing ultraviolet, reduce the ultraviolet ray transmissivity of cosmetics, extend coating,
The service life of the products such as resin, fiber or ink.
Additionally, carbon point is used as a kind of new UV absorbent, except inheriting material with carbon element small toxicity, good biocompatibility
The advantages of outside, also with optical stability it is good, be easy to the unrivaled advantage such as functionalization, therefore can be applicable to fiber, change
In cosmetic, coating, ink or resin.In addition, carbon point manufacturing process is simple, cost is very cheap, high temperature resistant, be not easily decomposed, and has
There is good stability, lasting ultra-violet absorption activity is kept by addition to can also make other products in other products.
Description of the drawings
Light transmittance collection of illustrative plates of the Fig. 1 for carbon point obtained in embodiment 1；
Transmission electron microscope pictures of the Fig. 2 for carbon point obtained in embodiment 1.
Specific embodiment
The present invention is further detailed explanation below in conjunction with the accompanying drawings.
It is prepared by carbon point：Weigh 1.5g anhydrous citric acids and be dissolved in 35ml distilled water, add 0.8ml ethylenediamines, mix homogeneously
After be added in reactor, carry out reaction 6h in 210 DEG C, after cooling, take out reactant liquor, Jing molecular weight be 1000 bag filter it is saturating
After analysis, remaining liq is carried out into vacuum distillation, gained residue is the carbon quantum dot of liquid, it is freeze-dried after can consolidate
Body finished product carbon point, or it is standby to be prepared into carbon dots solution.Obtained mobility carbon point is added water, diluted concentration is carried out to 1 μ g/g
Light rate detect, as shown in the light transmittance collection of illustrative plates of Fig. 1 carbon point, the carbon point of preparation in 200-400nm optical wavelength ranges, including 280-
The light of 400nm wave-length coverages, i.e. UVA and UVB regions, have significantly absorption, absworption peak I：λ max ≈ 267nm, light transmittance are about
36%；Absworption peak II：λ max ≈ 357nm, light transmittance are about 3%；Show that prepared carbon point has to UVA and UVB good
By adjusting carbon point concentration, assimilation effect, can realize that carbon point is fully absorbed to ultraviolet.Obtained carbon point is transmitted
Electronic Speculum is detected, as shown in Fig. 2 the carbon point that black skin dark stain is as prepared, carbon point is subcircular, is uniformly dispersed, particle size distribution range
Relatively concentrate.
1st, application of the carbon point on vinal, addition generally 0.01%～1.2%, specific operation process is such as
Under：
The polyvinyl alcohol that 9g molecular weight is 60000～150000 is weighed, is dissolved in deionized water, be divided into 3 parts, respectively
The carbon point (products obtained therefrom is labeled as sample 1) of addition 5mg, the carbon point (products obtained therefrom is labeled as sample 2) of 10mg, the carbon point of 20mg
(products obtained therefrom is labeled as sample 3), mix homogeneously are obtained vinal using the method for vacuum drying (60～80 DEG C).
Obtained vinal is observed, and UV resistance test is carried out with solar radiation spectrogrph, from wave-length coverage is
200-400nm light is irradiated to which, by table 1 in its absorbing wavelength and light transmittance record.
Table 1
2nd, application of the carbon point on sodium carboxymethyl cellulose, addition generally 0.01%～1.5%, specific operation process
It is as follows：
Weigh the sodium carboxymethyl cellulose that 7.5g purity is 92%, be dissolved in deionized water, be divided into 3 parts, respectively plus
Enter 10mg carbon point (products obtained therefrom is labeled as sample 1), the carbon point (products obtained therefrom is labeled as sample 2) of 20mg, 40mg carbon point (gained
Product labelling be sample 3), be thoroughly mixed uniform, in vacuum drying oven, be obtained in 30-60 DEG C of solidification transparent faint yellow
Carboxymethyl cellulose fiber thin film.Obtained carboxymethyl cellulose fiber thin film is observed, solar radiation spectrogrph is used
UV resistance test is carried out, which is irradiated for 200-400nm light from wave-length coverage, by table in its absorbing wavelength and light transmittance record
In 2.
Table 2
3rd, application of the carbon point on ultra light sun block lotion, addition generally 0.01%～2.0%, specific operation process is as follows：
12.0g avobenzones, 50.0g salicylates, 23.0ml oxybenzone, 3.0g defoamer, 34g emulsifying thickenings is taken successively
After agent, 78g water, stirring 20 minutes, 3 parts are divided into, 3mg carbon point (products obtained therefrom is labeled as sample 1), 8mg is separately added into
Carbon point (products obtained therefrom is labeled as sample 2), 16mg carbon point (products obtained therefrom is labeled as sample 3), are thoroughly mixed uniformly, that is, make
Obtain ultra light sun block lotion.Obtained ultra light sun block lotion is observed, and UV resistance test is carried out with solar radiation spectrogrph, from wavelength
Scope is irradiated to which for 200-400nm light, by table 3 in its absorbing wavelength and light transmittance record.
Table 3
4th, application of the carbon point on sunscreen cream, addition generally 0.01%～2.0%, specific operation process is as follows：
3g avobenzones, 13g salicylates, 5g octisalates, 4g oxybenzone is weighed respectively, and mixing post-heating extremely dissolves,
3 parts are divided into, under the conditions of 40 DEG C, the carbon point (gained of 5mg carbon point (products obtained therefrom is labeled as sample 1), 10mg is separately added into
Product labelling be sample 2), the carbon point (products obtained therefrom is labeled as sample 3) of 20mg be thoroughly mixed uniformly, obtain final product to room temperature anti-
Shine frost.Obtained sunscreen cream is observed, and UV resistance test is carried out with solar radiation spectrogrph, from wave-length coverage is
200-400nm light is irradiated to which, by table 4 in its absorbing wavelength and light transmittance record.
Table 4
5th, application of the carbon point on oil paint, addition generally 0.01%～2.0%, specific operation process is as follows：
62.00g epoxy resin, 33.00g organobentonites, 3.50g n-butyl alcohol, 1.00ml ethanol, 0.15ml bis- is taken successively
Toluene, 0.35ml defoamer, stir 2h at 80 DEG C, are divided into 3 parts, and (products obtained therefrom is labeled as sample to be separately added into 100mg carbon point
Product 1), the carbon point (products obtained therefrom is labeled as sample 2) of 150mg, 200mg carbon point (products obtained therefrom is labeled as sample 3), be sufficiently mixed
Afterwards, obtain final product the oil paint with anti-ultraviolet function.Film forming is coated to obtained oil paint, is then observed, with too
Solar radiation spectrum instrument carries out UV resistance test, which is irradiated for 200-400nm light from wave-length coverage, by its absorbing wavelength and
In light transmittance record in table 5.
Table 5
6th, application of the carbon point on water paint, addition generally 0.01%～3.5%, specific operation process is as follows：
Take 55.00g aqueous polyurethanes, 16.00g acrylic acid, 0.40g dispersants, 0.55ml defoamer, 1.05g successively to increase
Thick dose, 17.00ml pure water, stir 3h at 60 DEG C, are divided into 3 parts, and (products obtained therefrom is labeled as sample to be separately added into 50mg carbon point
1), the carbon point (products obtained therefrom is labeled as sample 2) of 100mg, 150mg carbon point (products obtained therefrom is labeled as sample 3), are sufficiently mixed
Afterwards, obtain final product the water paint with anti-ultraviolet function.Film forming is coated to obtained water paint, is then observed, with too
Solar radiation spectrum instrument carries out UV resistance test, which is irradiated for 200-400nm light from wave-length coverage, by its absorbing wavelength and
In light transmittance record in table 6.
Table 6
7th, application of the carbon point on water color ink, addition are 0.01%～3.5%, and specific operation process is as follows：
45.00% resin liquid, 9.00% phthalocyanine blue, 8.00% oil emulsion, 15.00% ethylene glycol is weighed by mass percentage
Ether, 0.50% defoamer, the common 90g of 22.50% deionized water, stir 1.5h, are divided into 3 parts, are separately added into 30mg carbon point
The carbon point (products obtained therefrom is labeled as sample 2) of (products obtained therefrom is labeled as sample 1), 60mg, (products obtained therefrom is labeled as 90mg carbon point
3) sample, after being sufficiently mixed, obtains final product the water color ink with anti-ultraviolet function.Obtained water color ink is coated into
Film, is then observed, and carries out UV resistance test with solar radiation spectrogrph, is 200-400nm light pair from wave-length coverage
Its irradiation, by table 7 in its absorbing wavelength and light transmittance record.
Table 7
8th, application of the carbon point on UV curable ink, addition are 0.01%～3.5%, and specific operation process is such as
Under：
30.0g acrylic resins, 10.0g trimethylolpropane trimethacrylates, two propylene of 31.0g tripropylene glycols is taken successively
Acid esters, 5.0ml benzophenone, 3.0ml benzils, 2.0ml methyl diethanolamines, 16.0g are pinkish red), stir 2h, average mark
Into 3 parts, be separately added into 30mg carbon point (products obtained therefrom is labeled as sample 1), the carbon point (products obtained therefrom is labeled as sample 2) of 60mg,
90mg carbon point (products obtained therefrom is labeled as sample 3), after being sufficiently mixed, obtains final product the UV curable with anti-ultraviolet function
Ink.Film forming is coated to obtained UV curable ink, is then observed, anti-purple is carried out with solar radiation spectrogrph
Outer test, is irradiated to which for 200-400nm light from wave-length coverage, and its absorbing wavelength and light transmittance are recorded in table 8.
Table 8
13rd, application of the carbon point on organic siliconresin, addition generally 0.01%～1.0%, specific operation process is such as
Under：
In molar ratio 6.5:1 weighs diphenyl silanediol and the common 12g of basic anion exchange resin D296R successively, then plus
Enter the Silane coupling agent KH550 of 1.2% (mass ratio with diphenyl silanediol), under nitrogen protection, in 70 DEG C of stirring reactions
2.5h, is divided into 3 parts, is then respectively adding 10mg carbon point (products obtained therefrom is labeled as sample 1), 20mg carbon point (products obtained therefrom
Be labeled as sample 2), 30mg carbon point (products obtained therefrom is labeled as sample 3), after being sufficiently mixed, filter and remove exchanger resin and decompression
Low-boiling-point substance is removed, the slightly yellow organic siliconresin with anti-ultraviolet function is obtained final product.Obtained organic siliconresin is coated
Film forming, is then observed, and carries out UV resistance test with solar radiation spectrogrph, is 200-1000nm light from wave-length coverage
Which is irradiated, by table 9 in its absorbing wavelength and light transmittance record.
Table 9
14th, application of the carbon point on epoxy resin, addition generally 0.01%～1.0%, specific operation process is as follows：
The bisphenol-A of 4.5g, the epoxychloropropane of 12.0g and 150ml toluene solvants is taken successively, is placed in reactor, rise
When warm 60 DEG C, etherification reaction 1.5h is carried out, 3 parts are divided into, (products obtained therefrom is labeled as sample to be then respectively adding 10mg carbon point
1), 20mg carbon point (products obtained therefrom is labeled as sample 2), 30mg carbon point (products obtained therefrom is labeled as sample 3), after being sufficiently mixed, drop
Plus NaOH solution carries out ring-closure reaction, then carry out extracting, wash, filter, obtain final product the slightly yellow epoxy with anti-ultraviolet function
Resin.Film forming is coated to obtained epoxy resin, is then observed, UV resistance survey is carried out with solar radiation spectrogrph
Examination, is irradiated to which for 200-1000nm light from wave-length coverage, by table 10 in its absorbing wavelength and light transmittance record.
Table 10
From table 1～12, carbon point is added in fiber, cosmetics, coating, ink and resin, obtained product exists
Strong ultraviolet radiation absorption effect is obtained in 200-400nm wave-length coverages, including UVA and UVB regions, can play filtering ultraviolet line
Effect.And, the amount that carbon point is added in fiber, cosmetics, coating, ink and resin is bigger, and obtained anti-ultraviolet is produced
Product are better to the assimilation effect of ultraviolet, and light transmittance is lower.Show that the carbon point in product is imitated to absorbing including UVA and UVB regions
Fruit is good, can play a part of filtering ultraviolet line, is prevented from skin aging and damage, fiber and tree that ultraviolet irradiation causes
The deterioration of fat is hardened, moreover it is possible to make coating and the color of ink keep bright and new.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, not
On the premise of departing from the invention design, some deformations and improvement can also be made, these belong to the protection model of the present invention
Enclose.
Claims (7)
1. application of the carbon point in anti-ultraviolet product is prepared.
2. application according to claim 1, it is characterised in that the anti-ultraviolet product be fiber, cosmetics, coating,
Ink or resin.
3. application according to claim 2, it is characterised in that the fiber is vinal or carboxymethyl cellulose
Sodium.
4. application according to claim 2, it is characterised in that the cosmetics are ultra light sun block lotion or sunscreen cream.
5. application according to claim 2, it is characterised in that the coating is oil paint or water paint.
6. application according to claim 2, it is characterised in that the ink is water color ink or UV curable ink.
7. application according to claim 2, it is characterised in that described resin is LED encapsulation organic siliconresin or ring
Oxygen tree fat.
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| CN108587600A (en) * | 2018-03-28 | 2018-09-28 | 中国科学院长春光学精密机械与物理研究所 | Room temperature phosphorimetry composite material, preparation method and application based on carbon nano dot |
| CN109111596A (en) * | 2018-06-29 | 2019-01-01 | 华南农业大学 | Carbon dots composite nanoparticle, carbon dots/fluoride composite material, preparation method and application |
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| CN108587600B (en) * | 2018-03-28 | 2019-12-27 | 中国科学院长春光学精密机械与物理研究所 | Room-temperature phosphorescent composite material based on carbon nanodots, and preparation method and application thereof |
| CN108587600A (en) * | 2018-03-28 | 2018-09-28 | 中国科学院长春光学精密机械与物理研究所 | Room temperature phosphorimetry composite material, preparation method and application based on carbon nano dot |
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| CN112813523B (en) * | 2021-01-26 | 2023-09-26 | 南京捷纳思新材料有限公司 | Preparation method of carbon-dot-doped polyvinyl alcohol fiber |
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