CN114031939B - Nylon/titanic acid nano-sheet composite material and preparation method thereof - Google Patents
Nylon/titanic acid nano-sheet composite material and preparation method thereof Download PDFInfo
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- CN114031939B CN114031939B CN202111470861.2A CN202111470861A CN114031939B CN 114031939 B CN114031939 B CN 114031939B CN 202111470861 A CN202111470861 A CN 202111470861A CN 114031939 B CN114031939 B CN 114031939B
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- 239000004677 Nylon Substances 0.000 title claims abstract description 52
- 229920001778 nylon Polymers 0.000 title claims abstract description 52
- 239000002135 nanosheet Substances 0.000 title claims abstract description 45
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 title claims abstract description 39
- 239000002131 composite material Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 22
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000005406 washing Methods 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 230000036571 hydration Effects 0.000 claims abstract description 14
- 238000006703 hydration reaction Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims abstract description 4
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 13
- 239000002612 dispersion medium Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000012266 salt solution Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 239000011591 potassium Substances 0.000 claims description 8
- 229910052700 potassium Inorganic materials 0.000 claims description 8
- 239000002064 nanoplatelet Substances 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 230000000887 hydrating effect Effects 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 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
- 229920000572 Nylon 6/12 Polymers 0.000 claims description 2
- 229920006152 PA1010 Polymers 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 239000002609 medium Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 13
- 150000001412 amines Chemical class 0.000 abstract description 8
- 238000009830 intercalation Methods 0.000 abstract description 6
- 230000002687 intercalation Effects 0.000 abstract description 6
- 239000002114 nanocomposite Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 15
- 239000000047 product Substances 0.000 description 14
- 238000002347 injection Methods 0.000 description 13
- 239000007924 injection Substances 0.000 description 13
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical group 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 description 9
- 229910052901 montmorillonite Inorganic materials 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 5
- 239000000138 intercalating agent Substances 0.000 description 5
- 239000004952 Polyamide Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920002647 polyamide Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 229910001414 potassium ion Inorganic materials 0.000 description 3
- -1 TEAOH Chemical compound 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 231100000171 higher toxicity Toxicity 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- VDZOOKBUILJEDG-UHFFFAOYSA-M tetrabutylammonium hydroxide Chemical compound [OH-].CCCC[N+](CCCC)(CCCC)CCCC VDZOOKBUILJEDG-UHFFFAOYSA-M 0.000 description 2
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 238000010539 anionic addition polymerization reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000012802 nanoclay Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
- C01P2004/24—Nanoplates, i.e. plate-like particles with a thickness from 1-100 nanometer
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention discloses a nylon/titanic acid nano-sheet composite material, which is prepared by uniformly mixing nylon and titanic acid nano-sheet powder according to a weight ratio of 1000:1-1000:10 and extruding the mixture in a double-screw extruder; wherein the titanic acid nano-sheet powder is prepared by taking potassium titanate whisker as a raw material through hydration and acid washing processes. The invention adopts a double screw extruder to melt and blend and extrude the nylon/titanic acid nano-sheet composite material, so that the nano-sheet is uniformly dispersed in the nylon, thereby preparing the high-performance nano-composite material. The preparation method is simple to operate, does not need to use an organic amine intercalation agent, and has low production cost and excellent composite material performance.
Description
Technical Field
The invention belongs to the field of nylon manufacturing, relates to composite nylon and a preparation method thereof, and particularly relates to a nylon/titanic acid nano-sheet composite material and a preparation method thereof.
Background
Nylon is an engineering plastic with wide application, and is widely applied to industries such as machinery, automobiles, ships and the like due to excellent physical and mechanical properties. However, nylon has the defects of high water absorption, low heat distortion temperature, low modulus and the like due to the existence of amide groups, and along with the progress of technology, various industries have higher requirements on nylon performance.
The traditional process uses inorganic filler in micron or millimeter level to strengthen nylon, but the problems of large filler dosage, insufficient dispersibility and the like often obviously affect the strengthening effect. Accordingly, there is a growing concern for the preparation of nylon composites using nanoparticles of smaller size and fewer structural defects. Due to the nanoscale effect and strong interface interaction, the nanocomposite material exhibits more excellent mechanical properties, heat resistance and good processability than the conventional composite material.
At present, the most representative is montmorillonite nano-sheet nylon composite material. For example, chinese patent CN1206028A carries out cation exchange reaction on montmorillonite, an intercalating agent and a protonating agent to obtain intercalated montmorillonite, and then the intercalated montmorillonite and polyamide are extruded into a high-performance nylon/montmorillonite nanocomposite in a double-screw extruder. The patent CN1687184A disperses the nano clay modified by organic amine in polyamide monomer, and prepares the modified polyamide with high viscosity by an anionic polymerization method. Although the addition of montmorillonite nano-sheets in the above patent improves the performance of nylon, toxic organic amine is required to be used as an intercalation agent in the preparation process, and environmental problems may occur.
By referring to the literature, the inventors found that titanate having a layered structure like montmorillonite can also be exfoliated from the titanate nanoplatelets by ion exchange, intercalation, or the like. Sukpirom et al, materials Science & Engineering 2002,333 (1): 218-222 use tetrabutylammonium hydroxide solution as an intercalating agent in combination with ultrasonic means to exfoliate layered titanates out of nanoplatelets. The intercalation stripping effect of four organic amine solutions of TMAOH, TEAOH, TPAOH and TBAOH on layered titanates was studied in detail by Yuan et al in ACS Applied Materials & Interfaces,2014,6 (11): 8567-8574. As with the modification of montmorillonite, the stripping of titanate also needs to use an organic amine solution with higher toxicity and high price, so that the environmental and cost problems limit the industrial application of titanate nano-sheets, and no scholars try to use the titanate nano-sheets to strengthen nylon materials at home and abroad so far.
Disclosure of Invention
Aiming at the defects of using organic amine with higher toxicity and high price as an intercalating agent to modify montmorillonite or titanate at present, the invention creatively and successfully peels out the titanate nano-sheets under the condition of not using the organic amine as the intercalating agent, and the method has simple operation, economy and environmental protection; and the titanate nanosheets are adopted to prepare the nylon/titanic acid nanocomposite, so that the mechanical properties of the nylon are greatly improved.
The invention aims at realizing the following technical scheme:
a nylon/titanic acid nano-sheet composite material is prepared by uniformly mixing nylon and titanic acid nano-sheet powder according to a weight ratio of 1000:1-1000:10, and extruding the mixture in a double-screw extruder; wherein the titanic acid nano-sheet powder is prepared by taking potassium titanate whisker as a raw material through hydration and acid washing processes.
Preferably, the weight ratio of the nylon to the titanic acid nano-sheet powder is 1000:3-1000:5.
Preferably, the nylon is one or more of PA66, PA6, PA1010, PA11, PA12, PA610 and PA 612.
Preferably, the titanic acid nano-sheet powder is prepared by taking potassium titanate whiskers as a raw material, hydrating the raw material in the steam atmosphere of an inorganic salt solution at 100-150 ℃ to obtain a hydration product, washing the hydration product by a protonating agent to obtain a washing product, dispersing the washing product in a dispersion medium, stirring, filtering and drying the washing product.
Specifically, the nano-sheet powder is prepared by the following method comprising the following steps:
step (1), preparing inorganic salt solution by inorganic salt and a dispersion medium according to a weight ratio of 1-10:1-50 parts;
step (2), taking potassium titanate whisker, and hydrating the potassium titanate whisker for 5 to 10 hours at the temperature of between 100 and 150 ℃ under the steam atmosphere of an inorganic salt solution to obtain a hydrated product;
step (3), washing the hydration product with the protonating agent according to the weight ratio of the potassium titanate whisker to the protonating agent of 1-60:500-2000, filtering and drying to obtain a washing product;
and (4) dispersing the washing product in a dispersion medium according to the weight ratio of the potassium titanate whisker to the dispersion medium of 1-60:1-200, stirring for 0.5-3 hours, filtering, and drying to obtain the titanic acid nanosheet powder.
Preferably, the weight ratio of the inorganic salt to the dispersion medium is 1:1-2.
Preferably, the inorganic salt is one or more of potassium chloride, sodium chloride and calcium chloride.
The weight ratio of the potassium titanate whisker to the inorganic salt is 1-60:1-10; preferably, the weight ratio of the potassium titanate whisker to the water is 1-3:1.
Preferably, the potassium titanate whisker is one of potassium dititanate, potassium tetratitanate, potassium hexatitanate and potassium octatitanate. The diameter of the potassium titanate whisker is 0.1-10 mu m, and the length is 1-1000 mu m.
Preferably, the weight ratio of the potassium titanate whisker to the protonating agent is 1:60-70.
Preferably, the protonating agent is one or more of phenol, hydrochloric acid, formic acid and acetic acid. Specifically, the concentration of the hydrochloric acid is 0.1mol/L.
Typically, the hydration product is washed three times with a protonating agent to ensure that the potassium ions in the titanate are thoroughly exchanged.
Preferably, the weight ratio of the potassium titanate whisker to the dispersion medium is 1:10-15.
Preferably, the dispersion medium is one or more of water, ethanol, propanol or chloroform.
Another object of the present invention is to provide a method for preparing a nylon/titanic acid nano-sheet composite material, comprising: uniformly mixing nylon and titanic acid nano-sheet powder in a kneader, extruding in a double-screw extruder at the temperature of 190-250 ℃ and granulating.
Further preferably, granulating by a double-screw extruder, drying, and adopting an injection machine to perform injection molding at the injection temperature of 235 ℃ and the injection pressure of 80Mpa to obtain the nylon titanic acid nano-sheet composite material mechanical property sample bar.
The invention has the beneficial effects that:
the invention peels the layered titanate into the titanate nano-sheets through hydration and acid washing processes under the condition of not adding an intercalation agent. The method comprises the steps of controlling the water vapor generation speed by adjusting the concentration of an inorganic salt solution, further controlling the hydration process, carrying out the hydration process under the conditions of high temperature and high pressure, reducing the vapor pressure of the solution by inorganic salt, allowing water molecules to permeate into the interlayer of the layered titanate, and expanding the interlayer spacing. The pickling process uses hydrogen ions to exchange potassium ions between titanate layers, so that the layered titanate is completely stripped without adding an intercalation agent.
The invention adopts a double screw extruder to melt and blend and extrude the nylon/titanic acid nano-sheet composite material, so that the nano-sheet is uniformly dispersed in the nylon, thereby preparing the high-performance nano-composite material. Compared with the traditional clay/polyamide composite technology, the preparation method is simple to operate, does not need to use an organic amine intercalating agent, and has low production cost and excellent composite material performance.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described in the following 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
4.7331g of calcium chloride was weighed and dissolved in 7.0944g of water to prepare a 40% calcium chloride solution.
20g of potassium dititanate whisker (diameter 2 μm, length 10 μm) was weighed and put into a hydrothermal kettle, and a beaker filled with a calcium chloride solution was put into the kettle so that the potassium dititanate whisker was distributed between the beaker and the hydrothermal kettle, and the potassium dititanate whisker was hydrated for 8 hours at 200 ℃ under a steam atmosphere of the calcium chloride solution, to obtain a hydrated product.
Dispersing the hydration product by 1350g of hydrochloric acid with the concentration of 0.1mol/L, stirring for 2 hours, filtering, pickling for 3 times, completely exchanging potassium ions in the titanate, and drying to obtain a washing product.
Dispersing the washing product in 200g deionized water, stirring at high speed for 0.5 hour, filtering, and drying to obtain the dititanate nanometer sheet powder.
Weighing 3g of dititanate nanosheet powder and 1000g of nylon PA6, mixing for 10min in a kneader to obtain a uniformly mixed material, extruding the mixed material in a double-screw extruder, wherein the extrusion temperature is 235 ℃; and (3) carrying out injection molding on an injection machine after granulating and drying (the injection temperature is 235 ℃ and the injection pressure is 80 Mpa) to obtain the nylon/titanic acid nano-sheet composite material, wherein the mechanical properties of the material are shown in table 1.
Example 2
Adjusting the dosage of the dititanate nanometer sheet powder (same as in example 1) to 5g, mixing with 1000g of nylon PA6 in a kneader for 10min, and extruding the mixture in a double-screw extruder at 235 ℃; and (3) granulating, drying, and then performing injection molding on an injection machine (the injection temperature is 235 ℃ and the injection pressure is 80 Mpa) to obtain the nylon/titanic acid nano-sheet composite material. The mechanical properties of the materials are shown in Table 1.
Example 3
Adjusting the dosage of the dititanate nanometer sheet powder (same as in example 1) to 10g, mixing with 1000g of nylon PA6 in a kneader for 10min, and extruding the mixture in a double-screw extruder at 235 ℃; and (3) granulating, drying, and then performing injection molding on an injection machine (the injection temperature is 235 ℃ and the injection pressure is 80 Mpa) to obtain the nylon/titanic acid nano-sheet composite material. The mechanical properties of the materials are shown in Table 1.
Comparative example 1
1000g of nylon PA6 was weighed and stirred for 10min, and then the mixture was extruded in a twin screw extruder at 235 ℃. Granulating, drying, and injection molding in an injection machine at 235deg.C under 80Mpa. The mechanical properties of the materials are shown in Table 1.
TABLE 1 mechanical Properties of materials
The result shows that the nylon/titanic acid nano-sheet composite material is prepared from nylon and titanic acid nano-sheet powder according to the weight ratio of 1000:3-1000:5, and the improvement effect on the mechanical property of nylon is most remarkable.
Claims (7)
1. A nylon/titanic acid nano-sheet composite material, which is characterized in that: the nylon/titanic acid nano-sheet composite material is obtained by uniformly mixing nylon and titanic acid nano-sheet powder according to the weight ratio of 1000:1-1000:10 and extruding the mixture in a double-screw extruder; wherein, the titanic acid nano-sheet powder is prepared by taking potassium titanate whisker as a raw material through hydration and acid washing processes;
the titanic acid nano-sheet powder is prepared by taking potassium titanate whiskers as a raw material, hydrating the raw material in the steam atmosphere of an inorganic salt solution at 100-150 ℃ to obtain a hydration product, washing the hydration product by a protonating agent to obtain a washing product, dispersing the washing product in a dispersing medium, stirring, filtering and drying the washing product to obtain the titanic acid nano-sheet powder;
the inorganic salt is one or more of potassium chloride, sodium chloride and calcium chloride;
the preparation of the inorganic salt solution comprises the following steps: inorganic salt and water are prepared into inorganic salt solution according to the weight ratio of 1-10:1-50;
the potassium titanate whisker is potassium dititanate;
the protonating agent is one or more of phenol, hydrochloric acid, formic acid and acetic acid.
2. The nylon/titanic acid nanoplatelet composite of claim 1, wherein: the weight ratio of the nylon to the titanic acid nano-sheet powder is 1000:3-1000:5.
3. The nylon/titanic acid nanoplatelet composite of claim 1, wherein: the nylon is one or more of PA66, PA6, PA1010, PA11, PA12, PA610 and PA 612.
4. The nylon/titanic acid nanoplatelet composite of claim 1, wherein: the nano-sheet powder is prepared by the following method which comprises the following steps:
step (1), preparing inorganic salt solution by inorganic salt and a dispersion medium according to a weight ratio of 1-10:1-50 parts;
step (2), taking potassium titanate whisker, and hydrating the potassium titanate whisker for 5 to 10 hours at the temperature of between 100 and 150 ℃ under the steam atmosphere of an inorganic salt solution to obtain a hydrated product;
step (3), washing the hydration product with the protonating agent according to the weight ratio of the potassium titanate whisker to the protonating agent of 1-60:500-2000, filtering and drying to obtain a washing product;
and (4) dispersing the washing product in a dispersion medium according to the weight ratio of the potassium titanate whisker to the dispersion medium of 1-60:1-200, stirring for 0.5-3 hours, filtering, and drying to obtain the titanic acid nanosheet powder.
5. The nylon/titanic acid nanoplatelet composite of claim 1, wherein: the diameter of the potassium titanate whisker is 0.1-10 mu m, and the length is 1-1000 mu m.
6. The nylon/titanic acid nanoplatelet composite of claim 1, wherein: the dispersion medium for dispersing the washing product is one or more of water, ethanol, propanol or chloroform.
7. A method for preparing the nylon/titanic acid nano-sheet composite material according to claim 1, which is characterized in that: comprising the following steps: uniformly mixing nylon and titanic acid nano-sheet powder in a kneader, and extruding in a double-screw extruder at the temperature of 190-250 ℃ to obtain the nylon/titanic acid nano-sheet composite material.
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| CN1526474A (en) * | 2003-09-22 | 2004-09-08 | 南京工业大学 | Synthesis of titania with high specific surface area |
| CN1910239A (en) * | 2004-01-16 | 2007-02-07 | 大塚化学株式会社 | Flame-retardant and flame-retardant resin composition |
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