CN110655668A - Hydroxyapatite nanowire/ANF composite film and preparation method and application thereof - Google Patents
Hydroxyapatite nanowire/ANF composite film and preparation method and application thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino carboxylic acids or of polyamines and polycarboxylic acids
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- 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
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/08—Oxygen-containing compounds
Abstract
The invention provides a hydroxyapatite nanowire/ANF composite film and a preparation method and application thereof, wherein the hydroxyapatite nanowire is ultrasonically dispersed in a solvent to obtain a uniform milky white solution, and the milky white solution is mixed with the ANF solution and stirred to obtain a uniform milky white solution; then mixing the ANF fiber with water, and stirring until the ANF fiber is uniformly dispersed in the solution; assembling layer by adopting a vacuum filtration mode to obtain the hydroxyapatite nanowire/ANF composite film; according to the invention, an interpenetrating network is formed by the aramid fiber nano-fiber and the hydroxyapatite nano-wire, so that the mechanical property of the composite film is improved, and the stability of the composite film is further improved as hydroxyl groups on a molecular chain form hydrogen bonds; the aramid nano-fiber with high mechanical property is added into a hydroxyapatite nano-wire system, so that the mechanical property of the material is effectively improved, and higher flame retardance is ensured; the preparation method is simple and low in cost; the composite film has high mechanical property and insulating property, and can be applied to the field of high-strength insulation resistance.
Description
Technical Field
The invention belongs to the technical field of nano material preparation, and particularly relates to a hydroxyapatite nanowire/ANF composite film, and a preparation method and application thereof.
Background
Hydroxyapatite (Ca)10(OH)2(PO4)6) As a member of the calcium phosphate family, are the major inorganic components of vertebrate bones and teeth; however, hydroxyapatite is typically formed into particles, short rods, or needles; thus, hydroxyapatite materials generally exhibit high brittleness and poor flexibility. In recent years, researchers find that Hydroxyapatite Nanowires (HNs) with high aspect ratio have high flexibility, and can solve the problems of high brittleness and poor flexibility of hydroxyapatite materials; the hydroxyapatite nanowire has the advantages of high thermal stability, good fire resistance and the like; the hydroxyapatite nanowire is used as an inorganic material and is combined with other organic substances to prepare a composite material with more excellent performance; however, in the prior art, the hydroxyapatite nanowire composite film has lower mechanical properties.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a hydroxyapatite nanowire/ANF composite film, a preparation method and application thereof, so as to solve the technical problem that the hydroxyapatite nanowire composite material in the prior art is poor in mechanical property.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
the invention provides a preparation method of a hydroxyapatite nanowire/ANF composite film, which comprises the following steps:
step 1, ultrasonically dispersing hydroxyapatite nanowires in a solvent to obtain a uniform milky white solution as a system I;
step 2, mixing the system I and the ANF solution, and stirring to obtain a uniform milky white solution serving as a system II;
step 3, mixing the system II with water, and stirring until the ANF fibers are uniformly dispersed in the solution to obtain a system III;
and 4, assembling the system III layer by layer in a vacuum filtration mode to obtain the hydroxyapatite nanowire/ANF composite film.
Further, in step 1, water or dimethyl sulfoxide is used as a solvent.
Further, in the step 1, the power of ultrasonic dispersion is 600-800W, and the time of ultrasonic dispersion is 0.5-1 h.
Further, in the step 2, the system I and the ANF solution are mixed according to the volume ratio of 1 (0.5-2); wherein, the mass percentage of the hydroxyapatite nano wire in the system one is 0.2 to 0.5 percent, and the concentration of ANF in the ANF solution is 0.2 to 0.5 g/L.
Further, in the step 3, the system II and water are mixed according to the volume ratio of 1 (1-3).
Furthermore, in the step 1, the hydroxyapatite nano wire with the diameter of 5-100 nanometers and the length of 5-100 μm is adopted.
The invention also provides a hydroxyapatite nanowire/ANF composite film, wherein the fracture strength of the hydroxyapatite nanowire/ANF composite film is 28-104Mpa, and the dielectric strength is 10-50 Kv/mm.
The invention also provides an application of the hydroxyapatite nanowire/ANF composite film, and the hydroxyapatite nanowire/ANF composite film is used for manufacturing an insulating flame-retardant material.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a preparation method of a hydroxyapatite nanowire/ANF composite film, which adopts aramid nanofiber as an organic phase and hydroxyapatite nanowire as an inorganic phase; the aramid nano fiber of the organic phase has the characteristics of high strength and high modulus, the hydroxyapatite nano wire of the inorganic phase has high length-diameter ratio, the aramid nano fiber and the hydroxyapatite nano wire form an interpenetrating network, the mechanical property of the composite film is improved, and the stability of the composite film is further improved by forming hydrogen bonds through hydroxyl groups on a molecular chain; meanwhile, the hydroxyapatite has good fire resistance, the aramid nano-fiber has acid and alkali resistance, high temperature resistance and flame retardance, and the aramid nano-fiber with high mechanical property is added into a hydroxyapatite nano-wire system, so that the mechanical property of the material is effectively improved, and higher flame retardance can be ensured; the preparation method is simple and low in cost.
The invention also provides a hydroxyapatite nanowire/ANF composite film which has high mechanical property and insulating property, has the breaking strength of 28-104MPa and the dielectric strength of 10-50Kv/mm, and is applied to the field of high-strength insulation.
Drawings
Fig. 1 is an SEM image of hydroxyapatite nanowires described in example 1;
fig. 2 is an SEM image of the hydroxyapatite nanowire/ANF composite film prepared in example 1.
Detailed Description
The invention is further illustrated by the following examples.
The invention provides a preparation method of a hydroxyapatite nanowire/ANF composite film, which comprises the following steps:
step 1, mixing hydroxyapatite nanowires with water or dimethyl sulfoxide, and performing ultrasonic dispersion to obtain a uniform milky white solution as a system I;
wherein, the mass percentage of the hydroxyapatite nano wire in the system one is 0.2 to 0.5 percent; the hydroxyapatite nanowire is 5-100 nanometers in diameter and 5-100 microns in length; in the ultrasonic dispersion process, the power of ultrasonic dispersion is 600-800W, and the time of ultrasonic dispersion is 0.5-1 h.
Step 2, mixing the system I in the step 1 with an ANF solution, and stirring to obtain a uniform milky white solution serving as a system II; wherein the first system is mixed with the ANF solution according to the volume ratio of 1 (0.5-2); wherein, the mass percentage of the hydroxyapatite nano wire in the system one is 0.2 to 0.5 percent, and the concentration of ANF in the ANF solution is 0.2 to 0.5g/L
Step 3, mixing the system II in the step 2 with water according to the volume ratio of 1 (1-3), and stirring until the ANF fibers are uniformly dispersed in the solution to obtain a system III; wherein the stirring speed is 300-500r/min, and the stirring time is 1-2 h;
step 4, assembling the system III in the step 3 layer by layer in a vacuum filtration mode to obtain the hydroxyapatite nanowire/ANF composite film; in the vacuum filtration process, a vacuum filtration bottle is adopted and a vacuum filtration mode is adopted, and the pressure in the vacuum filtration process is (-0.1MPa) - (-0.05 MPa).
The invention discloses a preparation method of a hydroxyapatite nanowire/ANF composite film, which adopts aramid nanofiber as an organic phase and hydroxyapatite nanowire as an inorganic phase; the aramid nano fiber of the organic phase has the characteristics of high strength and high modulus, the hydroxyapatite nano wire of the inorganic phase has high length-diameter ratio, the aramid nano fiber and the hydroxyapatite nano wire form an interpenetrating network, the mechanical property of the composite film is improved, and the stability of the composite film is further improved by forming hydrogen bonds through hydroxyl groups on a molecular chain; meanwhile, the hydroxyapatite has good fire resistance, the aramid nano-fiber has acid and alkali resistance, high temperature resistance and flame retardance, and the aramid nano-fiber with high mechanical property is added into a hydroxyapatite nano-wire system, so that the mechanical property of the material is effectively improved, and higher flame retardance can be ensured; the preparation method is simple and low in cost; the fracture strength of the prepared hydroxyapatite nanowire/ANF composite film is 28-104Mpa, and the dielectric strength is 10-50 Kv/mm; the hydroxyapatite nanowire/ANF composite film is used for manufacturing an insulating flame-retardant material.
Example 1
The preparation method of the hydroxyapatite nanowire/ANF composite film comprises the following steps:
step 1, mixing hydroxyapatite nanowires with water, and performing ultrasonic dispersion to obtain a uniform milky white solution as a system I; wherein, the mass percentage of the hydroxyapatite nano wire in the system one is 0.5 percent; the power of ultrasonic dispersion is 600W, and the ultrasonic dispersion time is 1 h; the hydroxyapatite nanowire is a hydroxyapatite nanowire with the average diameter of 50 nanometers and the length of 50 micrometers.
Step 2, mixing the system I in the step 1 with an ANF solution, and stirring to obtain a uniform milky white solution serving as a system II; wherein the first system is mixed with the ANF solution according to the volume ratio of 1: 0.5; the concentration of ANF in the ANF solution was 0.2 g/L.
Step 3, mixing the system II in the step 2 with water according to the volume ratio of 1:1, and stirring until the ANF fibers are uniformly dispersed in the solution to obtain a system III; wherein the stirring speed is 300r/min, and the stirring time is 2 h;
and 4, taking 50mL of the system III, and assembling layer by layer through a vacuum filtration bottle in a vacuum filtration mode under the pressure of-0.05 MPa to obtain the hydroxyapatite nanowire/ANF composite film.
As shown in fig. 1, fig. 1 shows an SEM image of the hydroxyapatite nanowire used in example 1, and it can be seen from fig. 1 that the hydroxyapatite has an average diameter of 50 nm and an average length of 50 μm, and the nano-grade hydroxyapatite nanowire and the ANF have more hydrogen bonding force, which is beneficial to improvement of mechanical properties of the composite material.
As shown in fig. 2, fig. 2 shows the hydroxyapatite/ANF composite film prepared in example 1, and it can be seen from fig. 2 that hydroxyapatite nanowires and ANF are distributed layer by layer to form a compact brick mud biomimetic structure, which has very high mechanical properties and insulation properties.
According to the test results, the fracture strength of the hydroxyapatite nanowire/ANF composite film disclosed in the embodiment 1 is 28MPa, and the dielectric strength is 50 Kv/mm.
The invention also provides an application of the hydroxyapatite/ANF composite film, the hydroxyapatite/ANF composite film is adopted to prepare the insulating flame-retardant material, and the electrode material of the self-supporting super capacitor has better flame retardance while ensuring the mechanical property.
Example 2
The preparation method of the hydroxyapatite nanowire/ANF composite film comprises the following steps:
step 1, mixing hydroxyapatite nanowires and dimethyl sulfoxide, and performing ultrasonic dispersion to obtain a uniform milky white solution as a system I; wherein, the mass percentage of the hydroxyapatite nano wire in the system one is 0.2 percent; the power of ultrasonic dispersion is 800W, and the ultrasonic dispersion time is 0.5 h; the hydroxyapatite nano-wire is 500 nanometers in average diameter and 500 micrometers in length.
Step 2, mixing the system I in the step 1 with an ANF solution, and stirring to obtain a uniform milky white solution serving as a system II; wherein the first system is mixed with the ANF solution according to the volume ratio of 1: 2; the concentration of ANF in the ANF solution was 0.5 g/L.
Step 3, mixing the system II in the step 2 with water according to the volume ratio of 1:3, and stirring until the ANF fibers are uniformly dispersed in the solution to obtain a system III; wherein the stirring speed is 500r/min, and the stirring time is 1 h;
and 4, taking 100mL of the system III, and assembling layer by layer through a vacuum filtration bottle in a vacuum filtration mode under the pressure of-0.1 MPa to obtain the hydroxyapatite nanowire/ANF composite film.
According to the test results, the fracture strength of the hydroxyapatite nanowire/ANF composite film disclosed in the embodiment 2 is 104MPa, and the dielectric strength is 10 Kv/mm.
Example 3
The preparation method of the hydroxyapatite nanowire/ANF composite film comprises the following steps:
step 1, mixing hydroxyapatite nanowires and dimethyl sulfoxide, and performing ultrasonic dispersion to obtain a uniform milky white solution as a system I; wherein, the mass percentage of the hydroxyapatite nano wire in the system one is 0.3 percent; the power of ultrasonic dispersion is 700W, and the ultrasonic dispersion time is 0.8 h; the hydroxyapatite nano-wire is 5 nanometers in average diameter and 5 micrometers in length.
Step 2, mixing the system I in the step 1 with an ANF solution, and stirring to obtain a uniform milky white solution serving as a system II; wherein the first system is mixed with the ANF solution according to the volume ratio of 1: 2; the concentration of ANF in the ANF solution was 0.4 g/L.
Step 3, mixing the system II in the step 2 with water according to the volume ratio of 1:3, and stirring until the ANF fibers are uniformly dispersed in the solution to obtain a system III; wherein the stirring speed is 400r/min, and the stirring time is 1.5 h;
and 4, taking 60mL of the system III, and assembling layer by layer through a vacuum filtration bottle in a vacuum filtration mode under the pressure of-0.1 MPa to obtain the hydroxyapatite nanowire/ANF composite film.
According to the test results, the fracture strength of the hydroxyapatite nanowire/ANF composite film disclosed in the embodiment 3 is 80MPa, and the dielectric strength is 20 Kv/mm.
Example 4
The preparation method of the hydroxyapatite nanowire/ANF composite film comprises the following steps:
step 1, mixing hydroxyapatite nanowires with water, and performing ultrasonic dispersion to obtain a uniform milky white solution as a system I; wherein, the mass percentage of the hydroxyapatite nano wire in the system one is 0.4 percent; the power of ultrasonic dispersion is 750W, and the ultrasonic dispersion time is 0.7 h; the hydroxyapatite nano-wire is a hydroxyapatite nano-wire with the average diameter of 68 nanometers and the length of 78 micrometers.
Step 2, mixing the system I in the step 1 with an ANF solution, and stirring to obtain a uniform milky white solution serving as a system II; wherein the first system is mixed with the ANF solution according to the volume ratio of 1: 1.5; the concentration of ANF in the ANF solution was 0.45 g/L.
Step 3, mixing the system II in the step 2 with water according to the volume ratio of 1:2.5, and stirring until the ANF fibers are uniformly dispersed in the solution to obtain a system III; wherein the stirring speed is 450r/min, and the stirring time is 1.7 h;
and 4, taking 80mL of the system III, and assembling layer by layer through a vacuum filtration bottle in a vacuum filtration mode under the pressure of-0.08 MPa to obtain the hydroxyapatite nanowire/ANF composite film.
According to the test results, the fracture strength of the hydroxyapatite nanowire/ANF composite film disclosed in the embodiment 4 is 60MPa, and the dielectric strength is 30 Kv/mm.
In light of the above-described embodiments of the present invention, it is to be understood that various changes and modifications can be made by one skilled in the art without departing from the scope and spirit of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. A preparation method of a hydroxyapatite nanowire/ANF composite film is characterized by comprising the following steps:
step 1, ultrasonically dispersing hydroxyapatite nanowires in a solvent to obtain a uniform milky white solution as a system I;
step 2, mixing the system I and the ANF solution, and stirring to obtain a uniform milky white solution serving as a system II;
step 3, mixing the system II with water, and stirring until the ANF fibers are uniformly dispersed in the solution to obtain a system III;
and 4, assembling the system III layer by layer in a vacuum filtration mode to obtain the hydroxyapatite nanowire/ANF composite film.
2. The method for preparing a hydroxyapatite nanowire/ANF composite film according to claim 1, wherein in the step 1, the solvent is water or dimethyl sulfoxide.
3. The method for preparing a hydroxyapatite nanowire/ANF composite film according to claim 1, wherein in the step 1, the power of ultrasonic dispersion is 600-800W, and the time of ultrasonic dispersion is 0.5-1 h.
4. The preparation method of the hydroxyapatite nanowire/ANF composite film according to claim 1, wherein in the step 2, the first system and the ANF solution are mixed according to a volume ratio of 1 (0.5-2); wherein, the mass percentage of the hydroxyapatite nano wire in the system one is 0.2 to 0.5 percent, and the concentration of ANF in the ANF solution is 0.2 to 0.5 g/L.
5. The method for preparing the hydroxyapatite nanowire/ANF composite film according to claim 1, wherein in the step 3, the system II and water are mixed according to a volume ratio of 1 (1-3).
6. The method for preparing a hydroxyapatite nanowire/ANF composite film according to claim 1, wherein in the step 1, the hydroxyapatite nanowire is a hydroxyapatite nanowire with a diameter of 5-100 nm and a length of 5-100 μm.
7. A hydroxyapatite nanowire/ANF composite film is characterized by being prepared by the preparation method of the hydroxyapatite nanowire/ANF composite film according to any one of claims 1 to 6; the fracture strength of the hydroxyapatite nanowire/ANF composite film is 28-104Mpa, and the dielectric strength is 10-50 Kv/mm.
8. The application of the hydroxyapatite nanowire/ANF composite film as claimed in claim 7, wherein the hydroxyapatite nanowire/ANF composite film is used for manufacturing an insulating flame-retardant material.
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| CN113851703A (en) * | 2021-09-18 | 2021-12-28 | 福州大学 | Polyhydroxy nano material composite solid polymer electrolyte |
| CN114426702A (en) * | 2022-01-19 | 2022-05-03 | 江西广源化工有限责任公司 | Composite inorganic flame retardant and preparation method thereof |
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