CN114990722B - Montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber - Google Patents
Montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber Download PDFInfo
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- CN114990722B CN114990722B CN202210703777.9A CN202210703777A CN114990722B CN 114990722 B CN114990722 B CN 114990722B CN 202210703777 A CN202210703777 A CN 202210703777A CN 114990722 B CN114990722 B CN 114990722B
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- montmorillonite
- polyvinyl alcohol
- magnesium diboride
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910052901 montmorillonite Inorganic materials 0.000 title claims abstract description 75
- PZKRHHZKOQZHIO-UHFFFAOYSA-N [B].[B].[Mg] Chemical compound [B].[B].[Mg] PZKRHHZKOQZHIO-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000004372 Polyvinyl alcohol Substances 0.000 title claims abstract description 61
- 229920002451 polyvinyl alcohol Polymers 0.000 title claims abstract description 61
- 239000003063 flame retardant Substances 0.000 title claims abstract description 56
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000002131 composite material Substances 0.000 title claims abstract description 45
- 239000000835 fiber Substances 0.000 title claims abstract description 42
- 239000006185 dispersion Substances 0.000 claims abstract description 14
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001291 vacuum drying Methods 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000007864 aqueous solution Substances 0.000 claims abstract description 4
- 230000001112 coagulating effect Effects 0.000 claims abstract description 4
- 238000004108 freeze drying Methods 0.000 claims abstract description 4
- 238000010257 thawing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009987 spinning Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 5
- 235000019270 ammonium chloride Nutrition 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 4
- 238000009210 therapy by ultrasound Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000007710 freezing Methods 0.000 claims description 2
- 230000008014 freezing Effects 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005119 centrifugation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000005530 etching Methods 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 230000008961 swelling Effects 0.000 abstract 1
- 239000012808 vapor phase Substances 0.000 abstract 1
- 238000002166 wet spinning Methods 0.000 abstract 1
- 238000001878 scanning electron micrograph Methods 0.000 description 6
- 239000002657 fibrous material Substances 0.000 description 3
- 239000002135 nanosheet Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000004964 aerogel Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 description 1
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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/50—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyalcohols, polyacetals or polyketals
-
- 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
- D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
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- 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)
Abstract
The invention discloses a montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber, which is characterized in that the mass content of montmorillonite in the composite fiber is 40-60%, the mass content of magnesium diboride is 2-7%, and the balance is polyvinyl alcohol; the montmorillonite assembled in nano layers is obtained by freeze thawing, ultrasonic centrifugation and freeze drying, and the montmorillonite assembled in nano layers is obtained by vapor phase swelling etching, ultrasonic centrifugation and vacuum drying with magnesium diboride, and is dispersed into a polyvinyl alcohol aqueous solution to obtain montmorillonite/magnesium diboride/polyvinyl alcohol dispersion; then methanol is selected as a coagulating bath, and montmorillonite/magnesium diboride/polyvinyl alcohol dispersion liquid is prepared by a wet spinning method. The preparation method provided by the invention is simple, mild in reaction condition, low in production cost, free from modification treatment on montmorillonite, high in tensile strength, low in heat release rate, low in total heat release amount and high in limiting oxygen index, and is expected to be used as a flexible and weaved flame retardant material.
Description
Technical Field
The invention belongs to the technical field of flame-retardant materials, and particularly relates to montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fibers.
Background
The montmorillonite is a nontoxic, smokeless and efficient environment-friendly halogen-free flame retardant, and at present, although the montmorillonite/polyvinyl alcohol composite flame retardant material is reported, the montmorillonite content in the obtained composite flame retardant material is generally lower, a prepared sample mainly comprises a montmorillonite film, aerogel and the like, and the preparation report on the high-content montmorillonite composite flame retardant fiber is very little. Meanwhile, for the montmorillonite composite flame-retardant material, not only the flame retardant property and the thermal stability of the montmorillonite composite flame-retardant material need to be further improved, but also the conventional film or aerogel flame-retardant material mode has great application limitation. Therefore, the preparation of the high-content montmorillonite-based composite flame-retardant fiber and the improvement of the excellent flame-retardant property of the high-content montmorillonite-based composite flame-retardant fiber not only greatly improve the flame-retardant property of the fiber material, but also obviously improve the mechanical property of the fiber material, and the development of a new application field of the flame-retardant fiber material is enabled to have important significance in developing a new technology for preparing the high-content montmorillonite-based composite fiber.
Disclosure of Invention
The invention aims to provide the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber which has low production cost and excellent mechanical and flame-retardant properties.
Aiming at the purposes, the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber adopted by the invention has the mass content of 40 to 60 percent, the mass content of magnesium diboride of 2 to 7 percent and the balance of polyvinyl alcohol; the preparation method comprises the following steps:
(1) Dispersing montmorillonite in water, removing undispersed solid by centrifugation after freeze thawing and ultrasonic dispersion, and freeze drying to obtain nano-lamellar assembled montmorillonite;
(2) Grinding and mixing magnesium diboride and ammonium chloride uniformly, calcining for 1-2 hours at 350-550 ℃ under vacuum condition, dispersing the calcined product in ethanol after suction filtration and washing and vacuum drying, carrying out ultrasonic treatment for 2-3 hours, centrifuging to remove undispersed solid, and vacuum drying to obtain nano-lamellar assembled magnesium diboride;
(3) Dispersing montmorillonite assembled by nano sheets and magnesium diboride assembled by nano sheets into a polyvinyl alcohol water solution, and stirring for 1-3 hours at 70-90 ℃ to obtain montmorillonite/magnesium diboride/polyvinyl alcohol dispersion liquid;
(4) Spraying montmorillonite/magnesium diboride/polyvinyl alcohol dispersion liquid from a spinning head with the diameter of 0.8-1.0 mm, and solidifying and molding the spinning trickle in a methanol coagulating bath to obtain the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber.
In the step (1), the montmorillonite is preferably sodium montmorillonite, the ultrasonic power is 250-350W, and the time is 10-15 minutes.
In the step (2), the molar ratio of magnesium diboride to ammonium chloride is preferably 1:1.5 to 2.5.
In the step (2), it is more preferable that the calcination is carried out at 450 to 500℃for 1 to 2 hours under vacuum.
In the step (2), the power of the ultrasonic wave is preferably 250 to 400W.
In the step (3), the polyvinyl alcohol preferably has a number average molecular weight of 80000 to 100000,
in the above step (3), it is further preferable that the concentration of polyvinyl alcohol in the aqueous solution of polyvinyl alcohol is 10 to 30g/L.
The beneficial effects of the invention are as follows:
1. the invention combines montmorillonite, polyvinyl alcohol and magnesium diboride, and in the combustion process, montmorillonite and magnesium diboride can cooperate with each other to promote polyvinyl alcohol to decompose and form a compact carbon barrier layer, thereby preventing fire from spreading and effectively reducing combustion heat release. Meanwhile, due to the zigzag path effect, the staggered arrangement of the nano sheet layers effectively slows down the exchange of heat flow and combustible gas between the inside and the outside of the fiber, and obviously improves the flame retardant property;
2. the preparation method of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber is simple, the reaction condition is mild, the production cost is low, the prepared composite flame-retardant fiber has high flame-retardant performance, the tensile strength can reach 304MPa at the highest, the heat release rate value is as low as 33W/g, the total heat release value is as low as 8.5kJ/g, the limiting oxygen index is as high as 49.8%, and the composite flame-retardant fiber is expected to be used as a flexible and weaveable flame-retardant material.
Drawings
FIG. 1 is an optical photograph of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 1.
FIG. 2 is a Fourier infrared spectrum of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber prepared in example 1.
FIG. 3 is a scanning electron micrograph of the surface of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 1.
FIG. 4 is a scanning electron micrograph of a cross section of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 1.
FIG. 5 is a drawing of a montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 1.
FIG. 6 is a graph showing the heat release rate of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 1.
FIG. 7 is a scanning electron micrograph of the surface of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 2.
FIG. 8 is a scanning electron micrograph of a cross-section of a montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 2.
FIG. 9 is a drawing of a plot of the tension of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 2.
FIG. 10 is a graph showing the heat release rate of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 2.
FIG. 11 is a scanning electron micrograph of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber surface prepared in example 3.
FIG. 12 is a scanning electron micrograph of a cross-section of a montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 3.
FIG. 13 is a drawing of a montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 3.
FIG. 14 is a graph showing the heat release rate of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber prepared in example 3.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, but the scope of the present invention is not limited to these examples.
Example 1
(1) Dispersing 5g of montmorillonite in 500mL of water, uniformly stirring, freezing at-20 ℃ for 24 hours, thawing at normal temperature for 24 hours, performing ultrasonic treatment for 10 minutes under the power of 300W, centrifuging at 6000rpm for 10 minutes to remove undispersed solids, and freeze-drying the obtained dispersion to obtain nano-lamellar assembled montmorillonite;
(2) Mixing 0.23g (5 mmol) of magnesium diboride with 0.53g (10 mmol) of ammonium chloride, grinding the mixture by an agate mortar for 30 minutes, vacuum sealing the obtained mixture in a glass tube, calcining the mixture in a tube furnace at 450 ℃ for 1 hour, vacuum drying the calcined product at 60 ℃ for 4 hours after washing by ethanol suction filtration, dispersing the dried product in ethanol, ultrasonically treating the dried product for 2 hours at 350W, centrifuging at 2000rpm for 10 minutes to remove undispersed solids, and vacuum drying the obtained dispersion at 60 ℃ for 6 hours to obtain nano-sheet-assembled magnesium diboride;
(3) Dispersing 0.08g of nano-lamellar assembled magnesium diboride and 1.92g of nano-lamellar assembled montmorillonite in 100mL of 20g/L polyvinyl alcohol aqueous solution, and stirring at 80 ℃ for 2 hours to obtain montmorillonite/magnesium diboride/polyvinyl alcohol dispersion; wherein the number average molecular weight of the polyvinyl alcohol is 80000-100000;
(4) And spraying montmorillonite/magnesium diboride/polyvinyl alcohol dispersion liquid from a spinning head by adopting a spinning head with the diameter of 0.8mm, and solidifying and forming the spinning trickle in a methanol coagulating bath to obtain the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber (see figure 1). The mass content of montmorillonite in the composite flame-retardant fiber is 48%, the mass content of magnesium diboride is 2%, and the balance is polyvinyl alcohol.
The prepared montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber is characterized and tested by adopting a Fourier infrared spectrometer, a scanning electron microscope, a universal material tester and a micro calorimeter, and the results are shown in figures 2-6. As can be seen from fig. 2, the resulting product consists of montmorillonite, magnesium diboride and polyvinyl alcohol. As can be seen from fig. 3 and 4, the prepared montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber has a montmorillonite and magnesium diboride characteristic layered structure, and the polyvinyl alcohol is uniformly compounded with the montmorillonite and the magnesium diboride. As can be seen from FIG. 5, the prepared montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber has good mechanical properties and tensile strength of 171MPa. As can be seen from FIG. 6, the heat release rate value is 64W/g, the total heat release value is 9.7kJ/g, and the flexible and woven flame retardant material can be used.
Example 2
In step (3) of this example, 0.2g of nano-platelet-assembled magnesium diboride and 1.8g of nano-platelet-assembled montmorillonite were dispersed in 100mL of a 20g/L aqueous polyvinyl alcohol solution, and stirred at 80℃for 2 hours to obtain a montmorillonite/magnesium diboride/polyvinyl alcohol dispersion. Other steps were the same as in example 1 to obtain montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber (see fig. 7 and 8). The composite flame-retardant fiber comprises montmorillonite 45% by mass, magnesium diboride 5% by mass, and polyvinyl alcohol the rest, wherein the tensile strength is 304MPa (see figure 9), the heat release rate value is 52W/g, the total heat release value is 8.5kJ/g (see figure 10), and the limiting oxygen index is 49.8%.
Example 3
In step (3) of this example, 0.28g of nano-platelet-assembled magnesium diboride and 1.72g of nano-platelet-assembled montmorillonite were dispersed in 100mL of a 20g/L aqueous polyvinyl alcohol solution, and stirred at 80℃for 2 hours to obtain a montmorillonite/magnesium diboride/polyvinyl alcohol dispersion. Other steps were the same as in example 1 to obtain montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber (see fig. 11 and 12). The mass content of montmorillonite in the composite flame-retardant fiber is 43%, the content fraction of magnesium diboride is 7%, the tensile strength is 216MPa (see figure 13), the heat release rate value is 33W/g, and the total heat release value is 8.6kJ/g (see figure 14).
Claims (2)
1. The preparation method of the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber is characterized by comprising the following steps:
(1) Dispersing 5g of montmorillonite in 500mL of water, uniformly stirring, freezing at-20 ℃ for 24 hours, thawing at normal temperature for 24 hours, performing ultrasonic treatment for 10 minutes under the power of 300W, centrifuging at 6000rpm for 10 minutes to remove undispersed solids, and freeze-drying the obtained dispersion to obtain nano-lamellar assembled montmorillonite;
(2) Mixing 0.23g of magnesium diboride with 0.53g of ammonium chloride, grinding the mixture for 30 minutes by an agate mortar, vacuum sealing the obtained mixture in a glass tube, calcining the mixture in a tube furnace at 450 ℃ for 1 hour, vacuum drying the calcined product at 60 ℃ for 4 hours after washing the calcined product by ethanol suction filtration, dispersing the dried product in ethanol, carrying out ultrasonic treatment at 350W for 2 hours, centrifuging at 2000rpm for 10 minutes to remove undispersed solids, and vacuum drying the obtained dispersion at 60 ℃ for 6 hours to obtain nano-sheet-assembled magnesium diboride;
(3) Dispersing 0.2g of nano-lamellar assembled magnesium diboride and 1.8g of nano-lamellar assembled montmorillonite in 100mL of 20g/L polyvinyl alcohol aqueous solution, and stirring at 80 ℃ for 2 hours to obtain montmorillonite/magnesium diboride/polyvinyl alcohol dispersion;
(4) And spraying montmorillonite/magnesium diboride/polyvinyl alcohol dispersion liquid from a spinning head by adopting a spinning head with the diameter of 0.8mm, and solidifying and forming the spinning trickle in a methanol coagulating bath to obtain the montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber.
2. The method for preparing montmorillonite/magnesium diboride/polyvinyl alcohol composite flame retardant fiber according to claim 1, wherein in the step (3), the number average molecular weight of the polyvinyl alcohol is 80000-100000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210703777.9A CN114990722B (en) | 2022-06-21 | 2022-06-21 | Montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber |
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| CN202210703777.9A CN114990722B (en) | 2022-06-21 | 2022-06-21 | Montmorillonite/magnesium diboride/polyvinyl alcohol composite flame-retardant fiber |
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| CN114990722B true CN114990722B (en) | 2024-01-19 |
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Non-Patent Citations (1)
| Title |
|---|
| 试验部分;S.K. Das等;《ACS Appl. Nano Mater》;第第1卷卷(第第4期期);摘要、试验部分以及图1和第21页图 * |
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