CN111635472A - Composite material with optical limiting characteristic and preparation method thereof - Google Patents
Composite material with optical limiting characteristic and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of functional composite materials, and particularly relates to a composite material with an optical limiting characteristic and a preparation method thereof. The invention provides a composite material with optical limiting property, and the components of the composite material comprise a base material and TiS2Nanosheets, TiS in composite2The mass percentage of the nano-sheets is less than or equal to 2 percent, and the base material is selectedFrom: PMMA, PU, polyimide or inorganic glass. The invention uses TiS2Compounding with a substrate in a nanosheet form to obtain TiS2The composite material with uniform dispersion is a solid material due to the adoption of the TiS2 nanosheets, and has excellent light amplitude limiting performance.
Description
Technical Field
The invention belongs to the technical field of functional composite materials, and particularly relates to a composite material with an optical limiting characteristic and a preparation method thereof.
Background
The high-intensity laser electronic equipment has the advantages of good beam quality, small volume, simple structure, convenient use and the like, and is widely applied to important fields of sensing, communication, industrial production, military, medical treatment and the like; however, high-intensity laser is easy to damage optically sensitive organs and devices such as human eyes and optical sensors, and therefore, there is an urgent need to prepare and research optical limiting materials with excellent performance such as low optical limiting threshold, high laser damage threshold, fast response speed, wide laser wavelength protection range, high laser protection efficiency, and the like.
Optical limiting refers to a material having a high transmittance under low intensity laser irradiation and a low transmittance under high intensity laser irradiation when the material is irradiated with laser light; the optical limiting process is realized by utilizing nonlinear optical effects such as nonlinear absorption, nonlinear refraction or nonlinear scattering of optical materials. Good optical limiting materials have high linear transmittance and low optical energy threshold, low limiting transmittance, and fast laser response.
Disclosure of Invention
The invention provides a novel composite material with optical limiting property, which takes polymethyl methacrylate (PMMA), Polyurethane (PU), polyimide, inorganic glass and the like as base materials, TiS2Nano meterThe sheet is used as optical limiting material, and the substrate and TiS are2The composite material with integrated structure and function is prepared by adopting simple methods such as bulk polymerization or solution polymerization and the like, and can be used as an optical limiting solid composite material with excellent performance to ensure that TiS2The device formation in the laser protection field becomes possible.
The technical scheme of the invention is as follows:
the first technical problem to be solved by the invention is to provide a composite material with optical limiting property, and the components of the composite material comprise a substrate and TiS2Nanosheets, TiS in composite2The mass percentage of the nano-sheets is less than or equal to 2 percent, and the base material is selected from the following components: polymethyl methacrylate (PMMA), Polyurethane (PU), polyimide, or inorganic glass.
Further, the composite material with the optical limiting characteristic is prepared by adopting a bulk polymerization method or a solution polymerization method.
Further, the solution polymerization method is as follows: dissolving the substrate with the benign solvent, and adding TiS2Blending the nanosheet dispersion liquid to obtain a blended liquid; then placing the blending solution at a temperature below the boiling point of the solvent for 12-80 hours to obtain the base material/TiS2A nanosheet composite.
Further, the bulk polymerization method is: firstly, raw material resin, initiator and TiS of a base material2Pre-polymerizing the nano-sheet dispersion liquid at the temperature of Tg-60-Tg-40 ℃ until the mixed solution is in a glycerol shape, and immediately cooling the mixed solution to room temperature; polymerizing the mixed solution at the temperature of Tg-80 to Tg-50 ℃ for 12 to 48 hours; then heating to Tm-50-Tm-20 ℃ for high-temperature polymerization for 1-10 hours to obtain the base material/TiS2A composite material; wherein, the Tg and the Tm respectively refer to the glass transition temperature and the melting point of the substrate.
Further, the initiator is selected from: benzoyl peroxide, cumene hydroperoxide or azobisisobutyronitrile.
Further, the TiS2The mass concentration of the nano-sheet dispersion liquid is 0.1-0.2 mg/ml.
In the present invention, TiS2The nano-sheet dispersion is prepared by the following method: mixing TiS2Dispersion of original powderIn the presence of isopropanol: refluxing acetonitrile (volume ratio, isopropanol: acetonitrile is 1: 39) for 12-36 hours at the azeotropic point of the solvent, carrying out ultrasonic treatment on the dispersion liquid for 1-6 hours, finally centrifuging for 30-60 minutes at 2000 revolutions, and taking supernatant to obtain TiS2A nanosheet dispersion.
The second technical problem to be solved by the present invention is to provide a method for preparing the above composite material with optical limiting characteristics, wherein the preparation method is bulk polymerization or solution polymerization.
Further, the solution polymerization method is as follows: dissolving the substrate with the benign solvent, and adding TiS2Blending the nanosheet dispersion liquid to obtain a blended liquid; then placing the blending solution at a temperature below the boiling point of the solvent for 12-80 hours to obtain the base material/TiS2A nanosheet composite.
Further, in the above solution polymerization method, the solvent is selected from acetone, toluene or chloroform.
Further, the bulk polymerization method is: firstly, raw material resin, initiator and TiS of a base material2Pre-polymerizing the nano-sheet dispersion liquid at the temperature of Tg-60-Tg-40 ℃ until the mixed solution is in a glycerol shape, and immediately cooling the mixed solution to room temperature; polymerizing the mixed solution at the temperature of Tg-80 to Tg-50 ℃ for 12 to 48 hours; then heating to Tm-50-Tm-20 ℃ for high-temperature polymerization for 1-10 hours to obtain the base material/TiS2A composite material; wherein, the Tg and the Tm respectively refer to the glass transition temperature and the melting point of the substrate.
Further, when the substrate is polymethyl methacrylate, the bulk polymerization method is: firstly, methyl methacrylate, an initiator and TiS2Pre-polymerizing the nanosheet dispersion liquid at 60-80 ℃ until the mixed solution is in a glycerol shape, and immediately putting the mixed solution into an ice water bath to cool to room temperature; polymerizing the mixed solution at the low temperature of 40-70 ℃ for 12-48 hours; then heating to 80-110 ℃ for high-temperature polymerization for 1-10 hours to obtain TiS2Polymethyl methacrylate composite material; wherein, methyl methacrylate, initiator and TiS2The mass ratio of the nano sheets is as follows: 97.484-99.468 parts of methyl methacrylate, 0.516-0.527 part of initiator and TiS20.005-2 weight% of nanosheetAnd (4) portions are obtained.
Further, in the above method, the initiator is selected from the group consisting of: benzoyl peroxide, cumene hydroperoxide or azobisisobutyronitrile.
In the bulk polymerization of the present invention, the prepolymerization reaction is carried out first for the following purposes: because the density of methyl methacrylate and the like is less than that of the polymer, the volume shrinkage is obvious in the polymerization process, and the volume excessive shrinkage can be avoided by prepolymerization; in addition, a large amount of heat can be generated in the monomer polymerization process, if the heat cannot be dissipated in time, the automatic acceleration can be easily generated to initiate the implosion, the prepolymerization is beneficial to the heat dissipation in the polymerization process, and the implosion is prevented; the purpose of carrying out high-temperature polymerization is as follows: because the polymerization cannot be completely carried out and part of the monomers are not reacted during the prepolymerization at low temperature, the reaction needs to be carried out for a while at higher temperature, so that the reaction tends to be complete.
The invention has the beneficial effects that:
(1) the invention uses TiS2Compounding with a substrate in the form of a nanosheet suspension to obtain TiS2Uniformly dispersed solid composite material and having excellent optical limiting properties, thereby making TiS2The device formation in the laser protection field becomes possible.
(2) The composite material is prepared by a bulk polymerization method or a solution blending method, and has the advantages of convenient operation, safety, environmental protection and simple required equipment.
(3) The composite material prepared by the invention has better NLO performance.
Drawings
FIG. 1a is a TiS obtained in example 1 of the present invention2A PMMA composite glass ultraviolet lamp irradiation picture; FIG. 1b is a photograph of a PMMA UV lamp produced in comparative example 1 of the present invention; under the ultraviolet lamp, TiS2The nanoplatelets will produce fluorescence; thus by comparison with TiS2The picture of the PMMA composite material and the pure PMMA under an ultraviolet lamp can be judged to be TiS2Dispersion in PMMA composite; in FIG. 1, TiS is compared with colorless and transparent pure PMMA2The surface of the/PMMA composite material presents uniform light blue, which shows that TiS2Uniformly dispersed in PMMA.
FIG. 2(a) is a TiS obtained in example 1 of the present invention2Graph of input and output energy relationship of/PMMA composite glass and PMMA prepared in comparative example 1; FIG. 2(b) shows TiS obtained in example 12The input energy and the normalized transmittance of the PMMA composite material are plotted; in fig. 2, as the incident laser energy density increases, the initial threshold (F) is reachedSLaser energy density value corresponding to the starting point at which the normalized transmittance starts to decrease), TiS2The normalized transmittance of the PMMA composite material is continuously reduced, which shows that the PMMA composite material has optical limiting performance; in addition, the lower initial threshold value can enable the composite material to have a wider laser protection range, and the TiS prepared by the composite material2The initial threshold value of the PMMA composite material is as low as 0.07J/cm2So that TiS2The PMMA composite material can effectively prevent the laser peak power from being 10mW/cm2And the above lasers, such as Nd: YAG pulsed solid-state laser, Nd: Ce: YAG laser, etc.
FIG. 3a is a photograph of a PMMA sample from comparative example 1 of the present invention; FIG. 3b is a TiS obtained in example 1 of the present invention2A photo of a/PMMA composite glass sample; as can be seen in FIG. 3, TiS2Although the visible light transmittance of the composite material is reduced to a certain extent, the visible light transmittance is still at a higher level, namely 82%.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention and are not intended to limit the scope of the present invention.
In the invention, the methyl methacrylate and the initiator are purchased and the purity is analytically pure, TiS2The concentration of the nano-sheet solution is 0.2 mg/ml; TiS2The nano-sheet dispersion is prepared by the following method: mixing TiS2Dispersion of the original powder in isopropanol: refluxing in acetonitrile (1: 39) at the azeotropic point of the solvent for 24 hours, performing ultrasonic treatment on the dispersion liquid for 4 hours, finally centrifuging at 2000 rpm for 30 minutes, and taking supernatant to obtain TiS2A nanosheet dispersion.
Example 1
1) Mixing 99.468 wt% of AMethyl methacrylate (20ml), 0.527 wt% of initiator benzoyl peroxide (BPO,0.1g) and 0.005 wt% of TiS2Pre-polymerizing the nano-sheet uniform dispersion liquid (5ml, 0.2mg/ml) in a water bath at 65 ℃ until the solution is in a glycerol shape, immediately putting the mixed solution into an ice water bath to cool to room temperature, then putting the solution in a drying oven at 40 ℃ for low-temperature polymerization, and after 40 hours, transferring the solution in a drying oven at 80 ℃ for high-temperature polymerization for 1 hour to obtain the TiS2A PMMA composite material;
2) the composite material obtained was observed by ultraviolet lamp irradiation, and the result is shown in FIG. 1 a; the results show that TiS2The nano-sheets are uniformly dispersed in TiS2In the PMMA composite material;
3) for TiS by open-hole Z-scan technique2NLO performance test is carried out on the PMMA composite material: placing the prepared composite material on a moving platform controlled by a computer, and moving the composite material along a z axis through a focal plane of a 100mm focal length lens; the beam waist radius of the focal plane is 23um, and the input energy is in the range of 10-100uJ (the input peak light intensity at the focal point is 0.40-4.0Gwcm-2Within range); the same applies below.
Example 2
1) 99.462 wt% of methyl methacrylate (20ml), 0.527 wt% of initiator benzoyl peroxide (BPO,0.1g) and 0.005 wt% of TiS2Pre-polymerizing the nano-sheet uniform dispersion liquid (5ml, 0.2mg/ml) in a 70 ℃ water bath until the solution is in a glycerol shape, immediately putting the mixed solution into an ice water bath to cool to room temperature, then putting the solution in a 40 ℃ oven for low-temperature polymerization, and after 40 hours, transferring the solution in a 80 ℃ oven for high-temperature polymerization for 1 hour to obtain the TiS2A PMMA composite material;
2) ultraviolet lamp irradiation observation is carried out on the obtained composite material, and the result shows that TiS2The nano-sheets are uniformly dispersed in TiS2In the PMMA composite material;
3) for TiS by open-hole Z-scan technique2the/PMMA composite material is subjected to NLO performance test.
Example 3
1) 20g of PMMA solid particles were dispersed in an excess of acetone and dissolved by heating with stirring in a water bath at 55 ℃ and then 5ml of PMMA solid particles were added to the solutionTiS2Uniformly dispersing the nanosheet (0.2mg/ml), continuously stirring for 10 minutes, pouring the mixed solution into a mold, putting the mold into a 40 ℃ oven, standing for 48 hours to obtain TiS2A PMMA composite material;
2) the ultraviolet lamp irradiation observation is carried out on the TiS alloy, and the result shows that the TiS alloy is TiS2The nano-sheets are uniformly dispersed in TiS2In the PMMA composite material
3) For TiS by open-hole Z-scan technique2the/PMMA composite material is subjected to NLO performance test.
Example 4
1) 20g of solid particles of Polyimide (PI) were dispersed in an excess of N-methylpyrrolidone (NMP) and dissolved by heating and stirring in a water bath at 80 ℃ and then 5ml of TiS was added to the solution2Uniformly dispersing the nanosheet (0.2mg/ml), continuously stirring for 10 minutes, pouring the mixed solution into a mold, putting the mold into a 40 ℃ oven, standing for 48 hours to obtain TiS2a/PI composite material;
2) the ultraviolet lamp irradiation observation is carried out on the TiS alloy, and the result shows that the TiS alloy is TiS2The nano-sheets are uniformly dispersed in TiS2In the/PI composite material
3) For TiS by open-hole Z-scan technique2And performing NLO performance test on the/PI composite material.
Comparative example 1
1) Adding 0.5 wt% of initiator benzoyl peroxide (BPO,0.1g) into 20ml of methyl methacrylate (99.5 wt%) solution, uniformly mixing, carrying out prepolymerization in a water bath at 65 ℃ until the solution is in a glycerol shape, immediately putting the mixed solution into cold water, cooling to room temperature, then placing the solution in a drying oven at 40 ℃ for low-temperature polymerization, and after 40 hours, transferring the solution in the drying oven at 80 ℃ for high-temperature polymerization for 1 hour to obtain PMMA glass;
2) carrying out ultraviolet lamp irradiation observation on the PMMA glass to determine the color of the PMMA glass under the ultraviolet lamp;
3) and (4) performing NLO performance test on the PMMA organic glass by an open-hole Z scanning technology.
Comparative example 2
1) Uniformly mixing 99.462 wt% of methyl methacrylate (20ml), 0.527 wt% of initiator benzoyl peroxide (BPO,0.1g) and 0.005 wt% of graphene oxide (5ml, 0.2mg/ml), prepolymerizing in a water bath at 65 ℃ until the solution is in a glycerol shape, immediately putting the mixed solution in an ice-water bath, cooling to room temperature, then putting the solution in a drying oven at 40 ℃ for low-temperature polymerization, and after 40 hours, transferring the solution in the drying oven at 80 ℃ for high-temperature polymerization for 1 hour to obtain the GO/PMMA composite material;
2) carrying out ultraviolet lamp irradiation observation on the GO/PMMA composite material to confirm that the GO/PMMA composite material with uniform dispersion is obtained;
3) and (3) performing NLO performance test on the GO/PMMA composite material by using a perforated Z scanning technology.
Comparative example 3
1) 99.468% by mass of methyl methacrylate (20ml), 0.527% by mass of initiator benzoyl peroxide (BPO,0.1g) and 0.005% by weight of TiS2Prepolymerizing a nanosheet uniform dispersion (5ml, 0.2mg/ml) in a water bath at 50 ℃ until the solution is in a glycerol shape, immediately putting the mixed solution into cold water to cool to room temperature, then putting the solution in a drying oven at 40 ℃ for low-temperature polymerization, and after 40 hours, transposing the solution in a drying oven at 80 ℃ for high-temperature polymerization for 1 hour to obtain TiS2A PMMA composite material;
2) visually observing to obtain TiS2The surface of the PMMA composite material is fish scale-shaped, and the light transmission is poor.
Comparative example 4
1) 99.462% by mass of methyl methacrylate (20ml), 0.527% by mass of initiator benzoyl peroxide (BPO,0.1g) and 0.005% by weight of TiS2Prepolymerizing a nanosheet uniform dispersion (5ml, 0.2mg/ml) in a water bath at 85 ℃ until the solution is in a glycerol shape, immediately putting the mixed solution into cold water to cool to room temperature, then putting the solution in a drying oven at 40 ℃ for low-temperature polymerization, and after 40 hours, transposing the solution in a drying oven at 80 ℃ for high-temperature polymerization for 1 hour to obtain TiS2A PMMA composite material;
2) visually observing to obtain TiS2The surface of the PMMA composite material is fish scale-shaped, and the light transmission is poor.
Comparative example 5
1) Methyl methacrylate (20ml) with the mass fraction of 99.462 percent and an initiator with the mass fraction of 0.527 percent are peroxidizedBenzoyl (BPO,0.1g) and 0.005 wt% TiS2Prepolymerization is carried out on the even dispersion liquid (5ml, 0.2mg/ml) of the nano-sheets under water bath at 65 ℃ until the solution is in a glycerol shape, the mixed solution is immediately put into cold water to be cooled to room temperature, then the solution is put into an oven at 30 ℃ for low-temperature polymerization, after 40 hours, the solution is transposed into the oven at 80 ℃ for high-temperature polymerization for 1 hour, and TiS is obtained2A PMMA composite material;
2) visually observing to obtain TiS2The surface of the PMMA composite material is fish scale-shaped, and the light transmission is poor.
Comparative example 6
1) 99.462% by mass of methyl methacrylate (20ml), 0.527% by mass of initiator benzoyl peroxide (BPO,0.1g) and 0.005% by weight of TiS2Prepolymerizing a nanosheet uniform dispersion (5ml, 0.2mg/ml) in a 65 ℃ water bath until the solution is in a glycerol shape, immediately putting the mixed solution into cold water to cool to room temperature, then putting the solution in an 80 ℃ oven to polymerize at a low temperature, after 40 hours, transposing the solution in an 80 ℃ oven to polymerize at a high temperature for 1 hour, thus obtaining TiS2A PMMA composite material;
2) visually observing to obtain TiS2The surface of the PMMA composite material is fish scale-shaped, and the light transmission is poor.
Comparative example 7
1) 99.462% by mass of methyl methacrylate (20ml), 0.527% by mass of initiator benzoyl peroxide (BPO,0.1g) and 0.005% by weight of TiS2Prepolymerizing a nanosheet uniform dispersion (5ml, 0.2mg/ml) in a 65 ℃ water bath until the solution is in a glycerol shape, immediately putting the mixed solution into cold water to cool to room temperature, then putting the solution in a 40 ℃ oven to polymerize at a low temperature, after 40 hours, transposing the solution in a 70 ℃ oven to polymerize at a high temperature for 1 hour to obtain TiS2A PMMA composite material;
2) visually observing to obtain TiS2The surface of the PMMA composite material is fish scale-shaped, and the light transmission is poor.
Comparative example 8
1) 99.462% by mass of methyl methacrylate (20ml), 0.527% by mass of initiator benzoyl peroxide (BPO,0.1g) and 0.005% by weight of TiS2The nano-sheets are uniformly dispersedPrepolymerizing the solution (5ml, 0.2mg/ml) in a water bath at 65 ℃ until the solution is glycerol-shaped, immediately putting the mixed solution into cold water to cool to room temperature, then putting the solution in a 40 ℃ oven for low-temperature polymerization, and after 40 hours, transferring the solution in a 120 ℃ oven for high-temperature polymerization for 1 hour to obtain the TiS2A PMMA composite material;
2) visually observing to obtain TiS2The PMMA composite material has implosion, most bubbles exist on the surface of glass, and the light transmission is poor.
Comparative example 9
1) 20g of PMMA solid particles were dispersed in excess ethanol and heated with stirring in a water bath at 60 ℃ and then 5ml of TiS was added to the solution2The nanosheet was uniformly dispersed (0.2mg/ml) and stirred for 2 hours, leaving the PMMA undissolved and failing to prepare.
Method for bulk polymerization the reaction conditions, degree of polymerization and surface condition of the resulting composite material of examples 1-2 and comparative examples 3-8 were compared by the present invention, and the results are shown in table 1. As can be seen from table 1, the prepolymerization temperature, the low-temperature polymerization temperature and the high-temperature polymerization temperature directly affect the polymerization of the composite glass and the surface morphology of the glass, and the prepolymerization temperature, the low-temperature polymerization temperature and the high-temperature polymerization temperature should be controlled within a proper temperature range in order to successfully prepare a composite material with a smooth surface by using a bulk polymerization method. The results of example 3 and comparative example 9 show that the solvent selection is critical to the preparation of composites using a solution blending process.
TABLE 1 degree of bulk polymerization and phenomena in examples 1-2 and comparative examples 3-8
Dispersibility is an important aspect affecting the performance of the composite; under the ultraviolet lamp, TiS2The nanoplatelets will produce fluorescence; thus by comparison with TiS2The picture of the PMMA composite material and the pure PMMA under an ultraviolet lamp can be judged to be TiS2Dispersion in PMMA composite; TiS in contrast to colorless, transparent pure PMMA2The surface of the/PMMA composite material presents uniform light blue, which shows that TiS2Is uniformly dispersed in PMMA (fig. 1).
TiS prepared by example 1 and comparative example 12The PMMA composite material and PMMA are subjected to optical limiting performance test, the normalized transmittance of the example sample is 26 percent, and the normalized transmittance of the comparative example PMMA is 100 percent, which shows that the optical limiting performance of the composite material is from TiS2(ii) a And from FIG. 2, we can derive the TiS we made2The initial threshold value of the PMMA composite material is as low as 0.07J/cm2So that TiS2The PMMA composite material can effectively prevent the laser peak power from being 10MW/cm2And the above lasers, such as Nd: YAG pulsed solid-state laser, Nd: Ce: YAG laser, etc. The GO/PMMA composite glass (50%) obtained in comparative example 2 is free of TiS2Normalized transmission as low as that of the/PMMA composite (26%), so TiS is more visible2The PMMA composite material has excellent optical limiting performance. It is noted that the blank PMMA has a visible light transmittance as high as 90%, while the composite glass prepared by bulk polymerization (82%) and solution blending (87%) has a visible light transmittance of more than 80% although there is a difference; it can be seen that TiS2Although the visible light transmittance of the composite material is reduced to a certain extent, the level of (2) is still higher (figure 3). Therefore, the composite glass prepared by the invention not only has excellent optical amplitude limiting performance and can effectively protect laser, but also has higher visible light transmittance and greater potential of practical application.
Claims (10)
1. A composite material having optical limiting properties, the components of the composite material comprising a substrate and TiS2Nanosheets, TiS in composite2The mass percentage of the nano-sheets is less than or equal to 2 percent, and the base material is selected from the following components: polymethyl methacrylate, polyurethane, polyimide or inorganic glass.
2. The composite material with optical limiting characteristics as claimed in claim 1, wherein the composite material is prepared by bulk polymerization or solution polymerization.
3. The composite material with optical limiting characteristics as claimed in claim 2, wherein the solution polymerization process is: dissolving the substrate with the benign solvent, and adding TiS2Blending the nanosheet dispersion liquid to obtain a blended liquid; then placing the blending solution at a temperature below the boiling point of the solvent for 12-80 hours to obtain the base material/TiS2A nanosheet composite.
4. The composite material with optical limiting characteristics as claimed in claim 2, wherein the bulk polymerization process is: firstly, raw material resin, initiator and TiS of a base material2Pre-polymerizing the nano-sheet dispersion liquid at the temperature of Tg-60-Tg-40 ℃ until the mixed solution is in a glycerol shape, and immediately cooling the mixed solution to room temperature; polymerizing the mixed solution at the temperature of Tg-80 to Tg-50 ℃ for 12 to 48 hours; then heating to Tm-50-Tm-20 ℃ for high-temperature polymerization for 1-10 hours to obtain the base material/TiS2A composite material; wherein, the Tg and the Tm respectively refer to the glass transition temperature and the melting point of the substrate.
5. The composite material with optical limiting properties of claim 3 or 4, wherein the TiS is2The mass concentration of the nano-sheet dispersion liquid is 0.1-0.2 mg/ml.
6. The method for preparing a composite material having light-limiting characteristics as claimed in any one of claims 1 to 5, wherein the method is a bulk polymerization method or a solution polymerization method.
7. The method of claim 6, wherein the solution polymerization process is: dissolving the substrate with the benign solvent, and adding TiS2Blending the nanosheet dispersion liquid to obtain a blended liquid; then placing the blending solution at a temperature below the boiling point of the solvent for 12-80 hours to obtain the base material/TiS2A nanosheet composite;
further, the solvent is selected from acetone, toluene or chloroform.
8. The method of claim 6, wherein the bulk polymerization process comprises: firstly, raw material resin, initiator and TiS of a base material2Pre-polymerizing the nano-sheet dispersion liquid at the temperature of Tg-60-Tg-40 ℃ until the mixed solution is in a glycerol shape, and immediately cooling the mixed solution to room temperature; polymerizing the mixed solution at the temperature of Tg-80 to Tg-50 ℃ for 12 to 48 hours; then heating to Tm-50-Tm-20 ℃ for high-temperature polymerization for 1-10 hours to obtain the base material/TiS2A composite material; wherein, the Tg and the Tm respectively refer to the glass transition temperature and the melting point of the substrate.
9. The method of claim 8, wherein the initiator is selected from the group consisting of: benzoyl peroxide, cumene hydroperoxide or azobisisobutyronitrile.
10. The method of claim 8 or 9, wherein when the substrate is polymethyl methacrylate, the bulk polymerization method is: firstly, methyl methacrylate, an initiator and TiS2Pre-polymerizing the nanosheet dispersion liquid at 60-80 ℃ until the mixed solution is in a glycerol shape, and immediately putting the mixed solution into an ice water bath to cool to room temperature; polymerizing the mixed solution at the low temperature of 40-70 ℃ for 12-48 hours; then heating to 80-110 ℃ for high-temperature polymerization for 1-10 hours to obtain TiS2Polymethyl methacrylate composite material; wherein, methyl methacrylate, initiator and TiS2The mass ratio of the nano sheets is as follows: 97.484-99.468 parts of methyl methacrylate, 0.516-0.527 part of initiator and TiS20.005-2 parts of nano sheet.
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