CN117263237A - Preparation method of aluminum titanate nanofiber - Google Patents
Preparation method of aluminum titanate nanofiber Download PDFInfo
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- CN117263237A CN117263237A CN202311200166.3A CN202311200166A CN117263237A CN 117263237 A CN117263237 A CN 117263237A CN 202311200166 A CN202311200166 A CN 202311200166A CN 117263237 A CN117263237 A CN 117263237A
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- aluminum titanate
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- nanofiber
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- 229910000505 Al2TiO5 Inorganic materials 0.000 title claims abstract description 59
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 title claims abstract description 59
- 239000002121 nanofiber Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 61
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000009987 spinning Methods 0.000 claims abstract description 25
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000007524 organic acids Chemical class 0.000 claims abstract description 6
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 6
- 239000010936 titanium Substances 0.000 claims abstract description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 30
- 238000011068 loading method Methods 0.000 claims description 30
- 239000011259 mixed solution Substances 0.000 claims description 22
- 239000000243 solution Substances 0.000 claims description 22
- 239000012528 membrane Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 13
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 11
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 11
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical group [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 9
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 2
- 235000011054 acetic acid Nutrition 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 2
- 235000019260 propionic acid Nutrition 0.000 claims description 2
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 2
- 230000035939 shock Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005245 sintering Methods 0.000 abstract description 3
- 238000001354 calcination Methods 0.000 abstract description 2
- 238000010041 electrostatic spinning Methods 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 2
- 239000012752 auxiliary agent Substances 0.000 abstract 1
- 230000020477 pH reduction Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 238000009856 non-ferrous metallurgy Methods 0.000 description 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/003—Titanates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/32—Thermal properties
Abstract
The invention discloses a preparation method of aluminum titanate nanofiber, and belongs to the technical field of aluminum titanate. Adding spinning auxiliary agent into N, N-dimethylformamide solution, stirring strongly, adding organic acid for acidification, selecting aluminum isopropoxide as an aluminum source, adding the aluminum source into the acidified solution, dissolving aluminum isopropoxide into a titanium source, stirring fully, spinning by electrostatic spinning, and calcining the spun fiber in a muffle furnace to obtain the aluminum titanate nanofiber. The method has the advantages of simple process, low equipment requirement, mild reaction condition and low preparation cost; the prepared aluminum titanate has a nanofiber structure, the diameter of the calcined aluminum titanate is 200-500nm, the thermal expansion coefficient is low, compared with common aluminum titanate, the aluminum titanate has the advantages of lower sintering temperature, better thermal shock resistance and obviously improved mechanical strength, and the improved properties enable the aluminum titanate nanofiber to be widely applied in manufacturing and have important application significance.
Description
Technical Field
The invention belongs to the technical field of aluminum titanate, and particularly relates to a preparation method of aluminum titanate nanofiber.
Background
Along with the rapid development of modern industry and high-temperature technology, the demand for fiber materials with high-temperature resistance, good thermal shock resistance and other comprehensive properties is more and more urgent, and the traditional aluminum silicate and other materials cannot meet the requirements of severe environments with high temperatures above 1350 ℃. Aluminum titanate (Al) 2 TiO 5 ) The material not only has high melting point (1860+/-10 ℃), but also has low thermal expansion coefficient (alpha is less than 1.5X10) -6 Low thermal conductivity (1.5W/(mK)), and hasHas the characteristics of excellent thermal shock resistance, strong acid and alkali corrosion resistance and the like, and is widely applied to the fields of military industry, metallurgy, kiln, environmental protection, automobile manufacturing, glass manufacturing and the like. The products which can be manufactured are as follows: a temperature thermocouple protective sleeve, a metallurgical industry pipeline, an automobile engine exhaust pipe, a high-grade refractory material and the like. However, aluminum titanate has poor mechanical properties, microcracks occur in the cooling process, and aluminum titanate is easy to decompose at low temperature and has poor thermal stability, which limit the application field of aluminum titanate.
In this regard, the chinese patent application of related art publication No. CN101172851a discloses a method for preparing a spinnable sol of aluminum titanate fiber, but the sol preparation process related to the present invention involves acid corrosion and vacuum treatment, which has high requirements on equipment and high preparation cost, and if the aluminum titanate nanofiber needs to be prepared, the spinnability of the sol needs to be further improved. The invention discloses an aluminum titanate nanofiber and a preparation method thereof, wherein the invention adopts a hydrothermal method, the hydrothermal reaction temperature is difficult to control, the technical difficulty is high, and the safety performance is poor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of aluminum titanate nanofiber.
The aim of the invention can be achieved by the following technical scheme:
the preparation method of the aluminum titanate nanofiber comprises the following steps:
s1, dissolving a spinning aid (PVP or PVB) in N, N-Dimethylformamide (DMF) in a three-neck flask with a stirring device, and stirring and uniformly mixing to obtain a mixed solution; the dosage ratio of polyvinylpyrrolidone to N, N-dimethylformamide is 5g to 100mL;
s2, adding organic acid (one or more of formic acid, acetic acid and propionic acid) into a three-neck flask provided with a stirring device, mixing with the mixed solution, stirring fully, then adding Aluminum Isopropoxide (AIP), stirring rapidly, then slowly adding a titanium source (tetrabutyl titanate or isopropyl titanate), and stirring fully for 8 hours until the mixture is completely dissolved to obtain spinning solution; the ratio of the dosage of the mixed solution, the organic acid, the aluminum isopropoxide and the titanium source is 100mL to 20-40g to 10-20g;
s3, transferring the spinning solution into a needle tube, mounting a flat-mouth needle, loading on a propelling device, loading 10kV-30kV positive pressure on the needle, loading 10kV-30kV negative pressure on a collecting roller, carrying out electrostatic spinning, setting the humidity to be 30% -70%, controlling the temperature to be 10 ℃ -30 ℃, pushing the needle at the speed of 2mL/h, and collecting on a collector to obtain a fibrous membrane;
and S4, placing the fiber membrane into a muffle furnace, heating to 800-1000 ℃ at a heating speed of 5 ℃/min for 1-3 h, and removing organic matters to obtain the aluminum titanate nanofiber.
The invention has the beneficial effects that:
the aluminum titanate nanofiber obtained by the invention has the advantages of simple process, lower equipment requirement, mild reaction condition, low preparation cost, low energy consumption and no harmful emission, is particularly suitable for large-scale production, has a nanofiber structure, has the diameter of 200-500nm after calcination, has the advantage of low thermal expansion coefficient of aluminum titanate, has lower sintering temperature and better thermal shock resistance compared with common aluminum titanate, and has better mechanical strength, particularly obviously improved flexural strength, and the improved properties can lead the prepared aluminum titanate nanofiber to be widely applied in the fields of nonferrous metallurgy with high requirements on high temperature resistance and thermal shock resistance, the manufacturing of products such as high-performance ceramic nozzles, ceramic pipes, ceramic molds and the like, and have important application significance.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a scanning electron microscope image of an aluminum titanate nanofiber prepared in example 3 of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Preparation of aluminum titanate nanofibers
S1, dissolving 5g of PVP in 100mL of N, N-dimethylformamide in a three-neck flask with a stirring device, and uniformly stirring and mixing to obtain a mixed solution;
s2, adding 20mL of acetic acid and 100mL of mixed solution into a three-neck flask with a stirring device, fully stirring, then adding 20g of aluminum isopropoxide, rapidly stirring, slowly adding 10g of tetrabutyl titanate, and fully stirring for 8 hours until the mixture is completely dissolved to obtain spinning solution;
s3, transferring the spinning solution into a needle tube, installing a flat-mouth needle, loading on a propelling device, loading 10kV positive pressure on the needle, loading 10kV negative pressure on a collecting roller, setting the humidity to be 30%, controlling the temperature to be 10 ℃, pushing the needle at the speed of 2mL/h, and collecting on a collector to obtain a fibrous membrane;
and S4, placing the fiber membrane into a muffle furnace, heating to 800 ℃ for 1h, and removing organic matters to obtain the aluminum titanate nanofiber.
Example 2
Preparation of aluminum titanate nanofibers
S1, dissolving 5g of PVP in 100mL of N, N-dimethylformamide in a three-neck flask with a stirring device, and uniformly stirring and mixing to obtain a mixed solution;
s2, adding 20mL of acetic acid into a three-neck flask with a stirring device, mixing with 100mL of mixed solution, fully stirring, then adding 30g of aluminum isopropoxide, rapidly stirring, slowly adding 15g of tetrabutyl titanate, and fully stirring for 8 hours until the mixture is completely dissolved to obtain spinning solution;
s3, transferring the spinning solution into a needle tube, installing a flat-mouth needle, loading on a propelling device, loading 10kV positive pressure on the needle, loading 10kV negative pressure on a collecting roller, setting the humidity to be 30%, controlling the temperature to be 10 ℃, pushing the needle at the speed of 2mL/h, and collecting on a collector to obtain a fibrous membrane;
and S4, placing the fiber membrane into a muffle furnace, heating to 800 ℃ for 1h, and removing organic matters to obtain the aluminum titanate nanofiber.
Example 3
Preparation of aluminum titanate nanofibers
S1, dissolving 5g of PVP in 100mL of N, N-dimethylformamide in a three-neck flask with a stirring device, and uniformly stirring and mixing to obtain a mixed solution;
s2, adding 20mL of acetic acid into a three-neck flask with a stirring device, mixing with 100mL of the mixed solution, fully stirring, then adding 40g of aluminum isopropoxide, rapidly stirring, slowly adding 20g of tetrabutyl titanate, and fully stirring for 8 hours until the mixture is completely dissolved to obtain spinning solution;
s3, transferring the spinning solution into a needle tube, installing a flat-mouth needle, loading on a propelling device, loading 10kV positive pressure on the needle, loading 10kV negative pressure on a collecting roller, setting the humidity to be 30%, controlling the temperature to be 10 ℃, pushing the needle at the speed of 2mL/h, and collecting on a collector to obtain a fibrous membrane;
and S4, placing the fiber membrane into a muffle furnace, heating to 800 ℃ for 1h, and removing organic matters to obtain the aluminum titanate nanofiber.
As shown in FIG. 1, a scanning electron microscope image of the aluminum titanate nanofiber prepared in example 3 was obtained.
Example 4
Preparation of aluminum titanate nanofibers
S1, dissolving 5g of PVB in 100mL of N, N-dimethylformamide in a three-neck flask with a stirring device, and stirring and mixing uniformly to obtain a mixed solution;
s2, adding 20mL of acetic acid into a three-neck flask with a stirring device, mixing with 100mL of the mixed solution, fully stirring, then adding 40g of aluminum isopropoxide, rapidly stirring, slowly adding 20g of tetrabutyl titanate, and fully stirring for 8 hours until the mixture is completely dissolved to obtain spinning solution;
s3, transferring the spinning solution into a needle tube, installing a flat-mouth needle, loading on a propelling device, loading 10kV positive pressure on the needle, loading 10kV negative pressure on a collecting roller, setting the humidity to be 30%, controlling the temperature to be 10 ℃, pushing the needle at the speed of 2mL/h, and collecting on a collector to obtain a fibrous membrane;
and S4, placing the fiber membrane into a muffle furnace, heating to 800 ℃ for 1h, and removing organic matters to obtain the aluminum titanate nanofiber.
Example 5
Preparation of aluminum titanate nanofibers
S1, dissolving 5g of PVP in 100mL of N, N-dimethylformamide in a three-neck flask with a stirring device, and uniformly stirring and mixing to obtain a mixed solution;
s2, adding 20mL of acetic acid and 100mL of mixed solution into a three-neck flask with a stirring device, fully stirring, then adding 40g of aluminum isopropoxide, rapidly stirring, slowly adding 20g of isopropyl titanate, and fully stirring for 8 hours until the mixture is completely dissolved to obtain spinning solution;
s3, transferring the spinning solution into a needle tube, installing a flat-mouth needle, loading on a propelling device, loading 10kV positive pressure on the needle, loading 10kV negative pressure on a collecting roller, setting the humidity to be 30%, controlling the temperature to be 10 ℃, pushing the needle at the speed of 2mL/h, and collecting on a collector to obtain a fibrous membrane;
and S4, placing the fiber membrane into a muffle furnace, heating to 800 ℃ for 1h, and removing organic matters to obtain the aluminum titanate nanofiber.
Example 6
Preparation of aluminum titanate nanofibers
S1, dissolving 5g of PVP in 100mL of N, N-dimethylformamide in a three-neck flask with a stirring device, and uniformly stirring and mixing to obtain a mixed solution;
s2, adding 20mL of acetic acid into a three-neck flask with a stirring device, mixing with 100mL of the mixed solution, fully stirring, then adding 40g of aluminum isopropoxide, rapidly stirring, slowly adding 20g of tetrabutyl titanate, and fully stirring for 8 hours until the mixture is completely dissolved to obtain spinning solution;
s3, transferring the spinning solution into a needle tube, installing a flat-mouth needle, loading on a propelling device, loading 30kV positive pressure on the needle, loading 30kV negative pressure on a collecting roller, setting the humidity to be 30%, controlling the temperature to be 10 ℃, pushing the needle at the speed of 2mL/h, and collecting on a collector to obtain a fibrous membrane;
and S4, placing the fiber membrane into a muffle furnace, heating to 800 ℃ for 1h, and removing organic matters to obtain the aluminum titanate nanofiber.
Example 7
Preparation of aluminum titanate nanofibers
S1, dissolving 5g of PVP in 100mL of N, N-dimethylformamide in a three-neck flask with a stirring device, and uniformly stirring and mixing to obtain a mixed solution;
s2, adding 20mL of acetic acid into a three-neck flask with a stirring device, mixing with 100mL of the mixed solution, fully stirring, then adding 40g of aluminum isopropoxide, rapidly stirring, slowly adding 20g of tetrabutyl titanate, and fully stirring for 8 hours until the mixture is completely dissolved to obtain spinning solution;
s3, transferring the spinning solution into a needle tube, installing a flat-mouth needle, loading on a propelling device, loading 10kV positive pressure on the needle, loading 10kV negative pressure on a collecting roller, setting the humidity to 70%, controlling the temperature to 30 ℃, pushing the needle at the speed of 2mL/h, and collecting on a collector to obtain a fibrous membrane;
and S4, placing the fiber membrane into a muffle furnace, heating to 800 ℃ for 1h, and removing organic matters to obtain the aluminum titanate nanofiber.
Example 8
Preparation of aluminum titanate nanofibers
S1, dissolving 5g of PVP in 100mL of N, N-dimethylformamide in a three-neck flask with a stirring device, and uniformly stirring and mixing to obtain a mixed solution;
s2, adding 20mL of acetic acid into a three-neck flask with a stirring device, mixing with 100mL of the mixed solution, fully stirring, then adding 40g of aluminum isopropoxide, rapidly stirring, slowly adding 20g of tetrabutyl titanate, and fully stirring for 8 hours until the mixture is completely dissolved to obtain spinning solution;
s3, transferring the spinning solution into a needle tube, installing a flat-mouth needle, loading on a propelling device, loading 10kV positive pressure on the needle, loading 10kV negative pressure on a collecting roller, setting the humidity to be 30%, controlling the temperature to be 10 ℃, pushing the needle at the speed of 2mL/h, and collecting on a collector to obtain a fibrous membrane;
and S4, placing the fiber membrane into a muffle furnace, heating to 1000 ℃ for 1h, and removing organic matters to obtain the aluminum titanate nanofiber.
Comparative example
The shape to be measured is made according to different standards using common aluminum titanate.
Examples 1-8, comparative examples, were prepared into corresponding shapes to be tested according to different criteria, and performance tests were performed to obtain the results shown in the following table:
as can be seen from the table, the prepared aluminum titanate has a nanofiber structure, the diameter of the nanofiber is 50-100 nm, the aluminum titanate has the advantage of low thermal expansion coefficient of aluminum titanate, and compared with common aluminum titanate, the aluminum titanate has the advantages of lower sintering temperature, better thermal shock resistance, obviously improved mechanical strength and particularly breaking strength, and the improved properties can lead the prepared aluminum titanate nanofiber to be widely applied in the fields of nonferrous metallurgy with high requirements on high temperature resistance and thermal shock resistance, mechanical manufacturing, and the manufacturing of products such as high-performance ceramic nozzles, ceramic pipe fittings, ceramic molds and the like, and have important application significance.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (9)
1. The preparation method of the aluminum titanate nanofiber is characterized by comprising the following steps of:
s1, dissolving a spinning aid in N, N-dimethylformamide, and uniformly stirring and mixing to obtain a mixed solution;
s2, mixing the organic acid with the mixed solution, fully stirring, then adding aluminum isopropoxide, rapidly stirring, then adding a titanium source, fully stirring until the solution is completely clarified, and obtaining spinning solution;
s3, transferring the spinning solution into a needle tube, mounting a flat-mouth needle, loading on a pushing device, loading positive pressure on the needle, loading negative pressure on a collecting roller, pushing the needle under a certain temperature and humidity, and collecting on a collector to obtain a fiber film;
and S4, placing the fiber membrane into a muffle furnace, and heating to remove organic matters to obtain the aluminum titanate nanofiber.
2. The method for preparing aluminum titanate nanofibers according to claim 1, wherein the dosage ratio of polyvinylpyrrolidone and N, N-dimethylformamide in step S1 is 5 g/100 ml.
3. The method of claim 1, wherein the spinning aid in step S1 is PVP or PVB.
4. The method for preparing aluminum titanate nanofibers according to claim 1, wherein the ratio of the amounts of the mixed solution, the organic acid, aluminum isopropoxide and the titanium source in step S2 is 100 ml:20-40g:10-20g.
5. The method for preparing aluminum titanate nanofibers according to claim 1, wherein the organic acid in step S2 is one or more of formic acid, acetic acid or propionic acid.
6. The method for preparing aluminum titanate nanofibers according to claim 1, wherein in step S2, the titanium source is tetrabutyl titanate or isopropyl titanate.
7. The method of claim 1, wherein the sufficient stirring time in step S2 is greater than 8 hours.
8. The method for preparing aluminum titanate nanofibers according to claim 1, wherein in step S3, the voltage is 10kV-30kV, the humidity is 30% -70%, and the temperature is 10 ℃ to 30 ℃.
9. The method for preparing aluminum titanate nanofibers according to claim 1, wherein the heating temperature in step S4 is 800 ℃ to 1000 ℃ and the heating time is 1h to 3h.
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