CN116120693A - Preparation method of polymethyl methacrylate-based Rayleigh scattering light diffusion plate material - Google Patents
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- 229920003229 poly(methyl methacrylate) Polymers 0.000 title claims abstract description 106
- 239000004926 polymethyl methacrylate Substances 0.000 title claims abstract description 106
- 238000009792 diffusion process Methods 0.000 title claims abstract description 75
- 239000000463 material Substances 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 85
- 239000002270 dispersing agent Substances 0.000 claims abstract description 44
- 239000002994 raw material Substances 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 26
- 238000001125 extrusion Methods 0.000 claims description 24
- 238000002834 transmittance Methods 0.000 claims description 15
- 230000001795 light effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 229920004890 Triton X-100 Polymers 0.000 claims description 9
- 239000013504 Triton X-100 Substances 0.000 claims description 9
- 238000009832 plasma treatment Methods 0.000 claims description 9
- 229920002319 Poly(methyl acrylate) Polymers 0.000 claims description 8
- 238000005469 granulation Methods 0.000 claims description 8
- 230000003179 granulation Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000004381 surface treatment Methods 0.000 claims description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 6
- 239000000377 silicon dioxide Substances 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 10
- 239000006185 dispersion Substances 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract 1
- 239000002105 nanoparticle Substances 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 13
- 239000005543 nano-size silicon particle Substances 0.000 description 10
- 235000012239 silicon dioxide Nutrition 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 238000005054 agglomeration Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008451 emotion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- 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
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- 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
- C08K9/00—Use of pretreated ingredients
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Optical Elements Other Than Lenses (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a preparation method of polymethyl methacrylate Rayleigh scattering type light diffusion plate material, which comprises the following raw materials, by weight, 99.491-99.895% of polymethyl methacrylate, 0.005-0.009% of Rayleigh scattering agent and 0.1-0.5% of dispersing agent. The raw material provided by the invention solves the problem of uneven dispersion of nano particles in a polymer matrix, and well improves the Rayleigh scattering effect.
Description
Technical Field
The invention relates to the technical field of polymethyl methacrylate (PMMA) material processing, in particular to a polymethyl methacrylate (PMMA) -based Rayleigh scattering light diffusion plate material and a processing technology.
Background
At present, researches show that people feel more comfortable in an indoor environment where sunlight enters, the working pressure and negative influence of people are reduced by sunlight irradiation, the comfort emotion and working efficiency are enhanced, and the physical and mental health of people living in the indoor is improved in the long term; however, some places in the room cannot be irradiated with sunlight, such as offices without natural environment light, conference rooms, underground shops and the like, and when the outside has no obvious view, the closed offices and rooms are easy to feel depressed, so that many Rayleigh scattering sunlight lamp systems are reported, virtual sun and diffuse blue sky effects are created through the sunlight lamp systems, and more comfortable working environments are created for people. The prior art such as CN112980125a uses too large or too small a content of scattering particles, sizes, etc. may lead to uneven particle distribution, difficulty in creating the effect of virtual sun and diffuse blue sky.
PMMA-based Rayleigh scattering light diffusion plate is one of novel optical materials capable of realizing the effect of diffusing blue light, the good and bad Rayleigh scattering effect is closely related to the use content and the dispersibility of scattering particles, once the scattering particles are uneven, the light transmittance and the haze are affected, so that the Rayleigh scattering effect is weakened.
Disclosure of Invention
The invention aims to provide a polymethyl methacrylate (PMMA) -based Rayleigh scattering light diffusion plate material and a processing technology thereof, so as to solve the problems in the background art.
In order to achieve the above purpose, the present application adopts the following technical scheme:
a PMMA-based Rayleigh scattering light diffusion plate material comprises polymethyl acrylate, a Rayleigh scattering agent and a dispersing agent, and is characterized in that: the components of the raw materials are 99.491 to 99.895 percent of polymethyl methacrylate, 0.005 to 0.009 percent of Rayleigh scattering agent and 0.1 to 0.5 percent of dispersing agent according to the weight percentage.
The preparation method of the PMMA-based Rayleigh scattering light diffusion plate material comprises the following steps:
step one, plasma treatment of Rayleigh scattering agent;
step two, PMMA, rayleigh scattering agent and dispersing agent are mixed according to proportion;
step three, double-screw extrusion granulation;
step four, preparing a PMMA-based Rayleigh scattering light diffusion plate by adopting an extrusion molding mode according to a light diffusion plate preparation process;
in the first step, the Rayleigh scattering agent is subjected to plasma surface treatment to improve the surface energy of the Rayleigh scattering agent;
in the second step, the materials are weighed according to 99.491 to 99.895 percent of polymethyl methacrylate, 0.005 to 0.009 percent of Rayleigh scattering agent and 0.1 to 0.5 percent of dispersing agent for standby;
in the second step, PMMA is required to be dried for 4-8 hours at 110 ℃, and the weighed materials are sequentially added into a high-speed mixer and fully stirred for 20-30 min;
in the third step, the dried and mixed raw materials are melted, extruded, cast and granulated by using a double-screw extruder, the temperature of each area of the double-screw extruder is 180-230 ℃, and the temperature of an extruder head is 210-240 ℃;
in the fourth step, the PMMA light diffusion plate is prepared by adopting an extrusion molding process flow.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is characterized in that: the original light transmittance of the PMMA is 90-95%.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is characterized in that: the Rayleigh scattering agent is one or two of nano titanium dioxide or nano silicon dioxide with blue light effect. Preferably, the nano titanium dioxide and the nano silicon dioxide with blue light effect are adopted, and the mass ratio of the nano titanium dioxide to the nano silicon dioxide is 1:1.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is characterized in that: the size of the Rayleigh scattering agent is 3.2-4.5 nm.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is characterized in that: the dispersing agent is Triton X-100.
The beneficial effects of this application:
1. according to the method, the Rayleigh scattering agent is subjected to plasma treatment, so that the hydrophilicity of the Rayleigh scattering agent is optimized, the Rayleigh scattering agent is uniformly dispersed in the base material, the production requirement can be met, the use satisfaction of a user is improved, and the market requirement can be better met.
2. The application adopts the Rayleigh scattering agent with the size of 3.2-4.5 nm, improves the uniform distribution of the Rayleigh scattering agent, and the particle agglomeration can be caused by the Rayleigh scattering agent with the oversized size. Undersized Rayleigh scattering agents can result in reduced hydrophilicity after surface treatment with plasma. The optimal Rayleigh scattering agent has the size of 3.9nm and 0.008 percent, and when the nano titanium dioxide and the nano silicon dioxide with the blue light effect are adopted, the mass ratio of the nano titanium dioxide to the nano silicon dioxide is 1:1, the Rayleigh scattering agent is uniformly dispersed in the base material, and the blue sky effect is also optimal. Too much or too little Rayleigh scattering agent can reduce the Rayleigh scattering effect, resulting in too high scattering intensity of light, which is detrimental to the reduction of agglomeration.
3. The dispersing agent is Triton X-100, the temperature of each area of the twin-screw extruder, the temperature of the extruder head and the like are strictly controlled, and the dispersing agent plays a very positive role in realizing uniform dispersion of the dispersing agent in a base material and improving the Rayleigh scattering effect.
Detailed Description
The invention is further described below in conjunction with the detailed description. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto. The detailed description is to be regarded as illustrative in nature and not as restrictive.
Example 1
A preparation method of a PMMA-based Rayleigh scattering light diffusion plate material comprises the following steps:
PMMA-based Rayleigh scattering light diffusion plate material comprises polymethyl acrylate, rayleigh scattering agent and dispersing agent, and is characterized in that: the components of the raw materials are 99.495 percent of polymethyl methacrylate, 0.005 percent of Rayleigh scattering agent and 0.5 percent of dispersing agent in percentage by weight;
step one, plasma treatment of Rayleigh scattering agent;
step two, PMMA, rayleigh scattering agent and dispersing agent are mixed according to proportion;
step three, double-screw extrusion granulation;
step four, preparing a PMMA-based Rayleigh scattering light diffusion plate by adopting an extrusion molding mode according to a light diffusion plate preparation process;
in the first step, the Rayleigh scattering agent is subjected to plasma surface treatment to improve the surface energy of the Rayleigh scattering agent;
in the second step, the materials are weighed according to 99.495 percent of polymethyl methacrylate, 0.005 percent of Rayleigh scattering agent and 0.5 percent of dispersing agent for standby;
in the second step, PMMA is required to be dried for 4 hours at 110 ℃, and the weighed materials are sequentially added into a high-speed mixer and fully stirred for 30 minutes;
in the third step, the dried and mixed raw materials are melted, extruded, cast and granulated by using a double-screw extruder, wherein the temperature of each area of the double-screw extruder is 180 ℃, and the temperature of an extruder head is 240 ℃;
in the fourth step, the PMMA light diffusion plate is prepared by adopting an extrusion molding process flow.
Wherein, the original light transmittance of the PMMA is 90 percent.
The PMMA-based Rayleigh scattering light diffusion plate material is characterized in that the Rayleigh scattering agent is nano titanium dioxide with a blue light effect.
Wherein the size of the Rayleigh scattering agent is 3.2nm.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is prepared from Triton X-100 as the dispersing agent.
Example 2
A preparation method of a PMMA-based Rayleigh scattering light diffusion plate material comprises the following steps:
PMMA-based Rayleigh scattering light diffusion plate material comprises polymethyl acrylate, rayleigh scattering agent and dispersing agent, and is characterized in that: the components of the raw materials are 99.691 percent of polymethyl methacrylate, 0.009 percent of Rayleigh scattering agent and 0.3 percent of dispersing agent in percentage by weight;
step one, plasma treatment of Rayleigh scattering agent;
step two, PMMA, rayleigh scattering agent and dispersing agent are mixed according to proportion;
step three, double-screw extrusion granulation;
step four, preparing a PMMA-based Rayleigh scattering light diffusion plate by adopting an extrusion molding mode according to a light diffusion plate preparation process;
in the first step, the Rayleigh scattering agent is subjected to plasma surface treatment to improve the surface energy of the Rayleigh scattering agent;
in the second step, the materials are weighed according to 99.691 percent of polymethyl methacrylate, 0.009 percent of Rayleigh scattering agent and 0.3 percent of dispersing agent for standby;
in the second step, PMMA is required to be dried for 8 hours at 110 ℃, and the weighed materials are sequentially added into a high-speed mixer and fully stirred for 20 minutes;
in the third step, the dried and mixed raw materials are melted, extruded, cast and granulated by using a double-screw extruder, wherein the temperature of each area of the double-screw extruder is 230 ℃, and the temperature of an extruder head is 240 ℃;
in the fourth step, the PMMA light diffusion plate is prepared by adopting an extrusion molding process flow.
Wherein, the original light transmittance of the PMMA is 95 percent.
The PMMA-based Rayleigh scattering light diffusion plate material is prepared from nano silicon dioxide with a blue light effect.
Wherein the size of the Rayleigh scattering agent is 4.5nm.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is prepared from Triton X-100 as the dispersing agent.
Example 3
A preparation method of a PMMA-based Rayleigh scattering light diffusion plate material comprises the following steps:
PMMA-based Rayleigh scattering light diffusion plate material comprises polymethyl acrylate, rayleigh scattering agent and dispersing agent, and is characterized in that: the components of the raw materials are 99.692 percent of polymethyl methacrylate, 0.008 percent of Rayleigh scattering agent and 0.3 percent of dispersing agent in percentage by weight;
step one, plasma treatment of Rayleigh scattering agent;
step two, PMMA, rayleigh scattering agent and dispersing agent are mixed according to proportion;
step three, double-screw extrusion granulation;
step four, preparing a PMMA-based Rayleigh scattering light diffusion plate by adopting an extrusion molding mode according to a light diffusion plate preparation process;
in the first step, the Rayleigh scattering agent is subjected to plasma surface treatment to improve the surface energy of the Rayleigh scattering agent;
in the second step, the materials are weighed according to 99.692 percent of polymethyl methacrylate, 0.008 percent of Rayleigh scattering agent and 0.3 percent of dispersing agent for standby;
in the second step, PMMA is required to be dried for 4-8 hours at 110 ℃, and the weighed materials are sequentially added into a high-speed mixer and fully stirred for 20min;
in the third step, the dried and mixed raw materials are melted, extruded, cast and granulated by using a double-screw extruder, wherein the temperature of each area of the double-screw extruder is 230 ℃, and the temperature of an extruder head is 240 ℃;
in the fourth step, the PMMA light diffusion plate is prepared by adopting an extrusion molding process flow.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is characterized in that: the original light transmittance of the PMMA was 95%.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is characterized in that: the Rayleigh scattering agent is nano titanium dioxide and nano silicon dioxide with blue light effect; the mass ratio of the nano titanium dioxide to the nano silicon dioxide is 1:1.
Wherein the size of the Rayleigh scattering agent is 3.9nm.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is prepared from Triton X-100 as the dispersing agent.
Comparative example 1
A preparation method of a PMMA-based Rayleigh scattering light diffusion plate material comprises the following steps:
PMMA-based Rayleigh scattering light diffusion plate material comprises polymethyl acrylate, rayleigh scattering agent and dispersing agent, and is characterized in that: the components of the raw materials are 99.495 percent of polymethyl methacrylate, 0.005 percent of Rayleigh scattering agent and 0.5 percent of dispersing agent in percentage by weight;
step one, plasma treatment is not carried out on the Rayleigh scattering agent;
step two, PMMA, rayleigh scattering agent and dispersing agent are mixed according to proportion;
step three, double-screw extrusion granulation;
step four, preparing a PMMA-based Rayleigh scattering light diffusion plate by adopting an extrusion molding mode according to a light diffusion plate preparation process;
in the second step, the materials are weighed according to 99.495 percent of polymethyl methacrylate, 0.005 percent of Rayleigh scattering agent and 0.5 percent of dispersing agent for standby;
in the second step, PMMA is required to be dried for 4 hours at 110 ℃, and the weighed materials are sequentially added into a high-speed mixer and fully stirred for 30 minutes;
in the third step, the dried and mixed raw materials are melted, extruded, cast and granulated by using a double-screw extruder, wherein the temperature of each area of the double-screw extruder is 180 ℃, and the temperature of an extruder head is 240 ℃;
in the fourth step, the PMMA light diffusion plate is prepared by adopting an extrusion molding process flow.
Wherein, the original light transmittance of the PMMA is 90 percent.
The PMMA-based Rayleigh scattering light diffusion plate material is characterized in that the Rayleigh scattering agent is nano titanium dioxide with a blue light effect.
Wherein the size of the Rayleigh scattering agent is 3.2nm.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is prepared from Triton X-100 as the dispersing agent.
Comparative example 2
A preparation method of a PMMA-based Rayleigh scattering light diffusion plate material comprises the following steps:
PMMA-based Rayleigh scattering light diffusion plate material comprises polymethyl acrylate, rayleigh scattering agent and dispersing agent, and is characterized in that: the components of the raw materials are 97.5 percent of polymethyl methacrylate, 2 percent of Rayleigh scattering agent and 0.5 percent of dispersing agent in percentage by weight;
step one, plasma treatment of Rayleigh scattering agent;
step two, PMMA, rayleigh scattering agent and dispersing agent are mixed according to proportion;
step three, double-screw extrusion granulation;
step four, preparing a PMMA-based Rayleigh scattering light diffusion plate by adopting an extrusion molding mode according to a light diffusion plate preparation process;
in the first step, the Rayleigh scattering agent is subjected to plasma surface treatment to improve the surface energy of the Rayleigh scattering agent;
in the second step, the materials are weighed according to 97.5 percent of polymethyl methacrylate, 2 percent of Rayleigh scattering agent and 0.5 percent of dispersing agent for standby;
in the second step, PMMA is required to be dried for 4 hours at 110 ℃, and the weighed materials are sequentially added into a high-speed mixer and fully stirred for 30 minutes;
in the third step, the dried and mixed raw materials are melted, extruded, cast and granulated by using a double-screw extruder, wherein the temperature of each area of the double-screw extruder is 180 ℃, and the temperature of an extruder head is 240 ℃;
in the fourth step, the PMMA light diffusion plate is prepared by adopting an extrusion molding process flow.
Wherein, the original light transmittance of the PMMA is 90 percent.
The PMMA-based Rayleigh scattering light diffusion plate material is characterized in that the Rayleigh scattering agent is nano titanium dioxide with a blue light effect.
Wherein the size of the Rayleigh scattering agent is 1nm.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is prepared from Triton X-100 as the dispersing agent.
Comparative example 3
A preparation method of a PMMA-based Rayleigh scattering light diffusion plate material comprises the following steps:
PMMA-based Rayleigh scattering light diffusion plate material comprises polymethyl acrylate, rayleigh scattering agent and dispersing agent, and is characterized in that: the components of the raw materials are 99.495 percent of polymethyl methacrylate, 0.005 percent of Rayleigh scattering agent and 0.5 percent of dispersing agent in percentage by weight;
step one, plasma treatment of Rayleigh scattering agent;
step two, PMMA, rayleigh scattering agent and dispersing agent are mixed according to proportion;
step three, double-screw extrusion granulation;
step four, preparing a PMMA-based Rayleigh scattering light diffusion plate by adopting an extrusion molding mode according to a light diffusion plate preparation process;
in the first step, the Rayleigh scattering agent is subjected to plasma surface treatment to improve the surface energy of the Rayleigh scattering agent;
in the second step, the materials are weighed according to 99.495 percent of polymethyl methacrylate, 0.005 percent of Rayleigh scattering agent and 0.5 percent of dispersing agent for standby;
in the second step, PMMA is required to be dried for 4 hours at 110 ℃, and the weighed materials are sequentially added into a high-speed mixer and fully stirred for 30 minutes;
in the third step, the dried and mixed raw materials are melted, extruded, cast and granulated by using a double-screw extruder, wherein the temperature of each area of the double-screw extruder is 240 ℃, and the temperature of an extruder head is 180 ℃;
in the fourth step, the PMMA light diffusion plate is prepared by adopting an extrusion molding process flow.
Wherein, the original light transmittance of the PMMA is 90 percent.
The PMMA-based Rayleigh scattering light diffusion plate material is characterized in that the Rayleigh scattering agent is nano titanium dioxide with a blue light effect.
Wherein the size of the Rayleigh scattering agent is 15nm.
Wherein the PMMA-based Rayleigh scattering light diffusion plate material is prepared from Triton X-100 as the dispersing agent.
The light diffusion plates prepared in examples 1 to 3 and comparative examples 1 to 3 were tested, and the light diffusion plates prepared in examples 1 to 3 each achieve uniform dispersion of the Rayleigh scattering agent in the base material without occurrence of particle agglomeration. In the embodiment 3, the Rayleigh scattering agent adopts nano titanium dioxide and nano silicon dioxide with blue light effect, the mass ratio of the nano titanium dioxide to the nano silicon dioxide is 1:1, the Rayleigh scattering agent content is 0.008 percent, and the size is 3.9nm. The light diffusion plate is tested for light transmittance difference between 390-492 nm wave band and 492-760 nm wave band, blue degree and the like, wherein the light transmittance difference is between 37-45%, the light transmittance difference of the embodiment 3 is between 42-45%, the blue sky effect is optimal, and the blue sky has very comfortable look and feel blue degree.
The light diffusion plates prepared in comparative examples 1 to 3 have a light transmittance difference of 2 to 9%, and the light diffusion plates in comparative examples have very low light transmittance differences, which are difficult to meet the market demands. In terms of bluiness, the light diffusion plates prepared in comparative examples 1 to 3 are low in bluiness, agglomeration occurs, the total light transmittance is low, and the appearance bluiness is poor.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the present invention and that the improvements and modifications as set forth herein are intended to be within the scope of the present application.
Claims (8)
1. A preparation method of PMMA-based Rayleigh scattering light diffusion plate material comprises polymethyl acrylate, rayleigh scattering agent and dispersing agent, and is characterized in that: the components of the raw materials are 99.491 to 99.895 percent of polymethyl methacrylate, 0.005 to 0.009 percent of Rayleigh scattering agent and 0.1 to 0.5 percent of dispersing agent according to the weight percentage.
2. The method for preparing a PMMA-based rayleigh scattering type light diffusion plate material according to claim 1, comprising the steps of:
step one, plasma treatment of Rayleigh scattering agent;
step two, PMMA, rayleigh scattering agent and dispersing agent are mixed according to proportion;
step three, double-screw extrusion granulation;
step four, preparing a PMMA-based Rayleigh scattering light diffusion plate by adopting an extrusion molding mode according to a light diffusion plate preparation process;
in the first step, the Rayleigh scattering agent is subjected to plasma surface treatment to improve the surface energy of the Rayleigh scattering agent;
in the second step, the materials are weighed according to 99.491 to 99.895 percent of polymethyl methacrylate, 0.005 to 0.009 percent of Rayleigh scattering agent and 0.1 to 0.5 percent of dispersing agent for standby;
in the second step, PMMA is required to be dried for 4-8 hours at 110 ℃, and the weighed materials are sequentially added into a high-speed mixer and fully stirred for 20-30 min;
in the third step, the dried and mixed raw materials are melted, extruded, cast and granulated by using a double-screw extruder, the temperature of each area of the double-screw extruder is 180-230 ℃, and the temperature of an extruder head is 210-240 ℃;
in the fourth step, the PMMA light diffusion plate is prepared by adopting an extrusion molding process flow.
3. The PMMA based rayleigh scattering light diffusion plate material according to claim 1 or 2, wherein the original light transmittance of PMMA is 90 to 95%.
4. The PMMA-based rayleigh scattering light diffusion plate material according to claim 1 or 2, wherein the rayleigh scattering agent is one or both of nano titania or nano silica having blue light effect.
5. The PMMA-based rayleigh scattering light diffusion plate material according to claim 1 or 2, wherein the rayleigh scattering agent is nano titania and nano silica having blue light effect, and the mass ratio of nano titania and nano silica is 1:1.
6. The PMMA based rayleigh scattering light diffusion plate material according to claim 1 or 2, wherein the rayleigh scattering agent has a size of 3.2 to 4.5nm.
7. PMMA-based rayleigh scattering light diffusion plate material according to claim 1 or 2, wherein the rayleigh scattering agent has a size of 3.9nm.
8. PMMA-based rayleigh scattering light diffusion plate material according to claim 1 or 2, wherein the dispersant is Triton X-100.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008050242A (en) * | 2006-08-22 | 2008-03-06 | Isi:Kk | Light multiply-scattering titanium oxide and composite body of the same |
| CN112876795A (en) * | 2021-01-20 | 2021-06-01 | 青岛易来智能科技股份有限公司 | Rayleigh scattering material master batch, preparation method thereof, light diffusion plate and lighting device |
| CN112980125A (en) * | 2021-02-22 | 2021-06-18 | 安徽新涛光电科技有限公司 | Rayleigh scattering PMMA plate and preparation method thereof |
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