CN109810285B - Spectrum selective heat insulation slurry for PC heat insulation master batch and preparation method thereof - Google Patents
Spectrum selective heat insulation slurry for PC heat insulation master batch and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the field of heat insulation slurry, in particular to spectrum selective heat insulation slurry for PC heat insulation master batches and a preparation method thereof. By adding the dispersing agent, the cesium tungstate nano powder is uniformly dispersed in the solvent, and the agglomeration phenomenon of the cesium tungstate nano powder is prevented, so that the performance of the heat insulation slurry is uniform and stable. The nano cesium tungstate has the optimal absorption capacity for the near infrared region (wavelength 800-. The cesium tungstate nanometer powder can shield most of ultraviolet light and still absorb a small part of ultraviolet light. The ultraviolet absorption rate of the heat insulation slurry can be improved through the addition of the stabilizer, so that a small part of absorbed ultraviolet can be stably absorbed, and the ultraviolet passing through the nano slurry is reduced as much as possible. Thereby further improving the ultraviolet-proof performance of the spectrum selective heat insulation slurry.
Description
Technical Field
The invention relates to the field of heat insulation slurry, in particular to spectrum selective heat insulation slurry for PC heat insulation master batches and a preparation method thereof.
Background
With the rapid development of scientific technology and social production, energy and environment become two major problems which are increasingly noticed by the society, thereby providing higher requirements for energy conservation and environmental protection. In the prior art, PC has excellent characteristics of high strength, high elastic coefficient, high impact strength, strong fatigue resistance and the like, and is widely applied to various fields in various industrial production.
In the Chinese patent with the publication number of CN101219859B, the invention discloses a nano oily ATO heat insulation slurry, a preparation method and an application thereof, wherein the slurry comprises 67-90 parts by weight of an alcohol solvent, 10-30 parts by weight of nano ATO powder and a dispersant accounting for 2-10% of the weight of the ATO powder. When in preparation, the nano ATO powder, the alcohol solvent and the dispersant are pre-dispersed under the action of stirring or ultrasonic wave, and then the pre-dispersion is ground and dispersed to prepare the oily ATO heat insulation slurry. The transparent inorganic silicon heat insulation coating prepared from the nano oily ATO heat insulation slurry consists of the transparent inorganic silicon coating and the nano oily ATO heat insulation slurry, and the weight ratio of the transparent inorganic silicon coating to the nano oily ATO heat insulation slurry is 3: 1-1: 1. The coating prepared by the invention has the advantages of good heat insulation effect, high hardness and transparency, good weather resistance and certain fireproof effect.
However, the nano oil-based ATO thermal insulation paste is suitable for being coated on various kinds of glass, so that the glass has good thermal insulation performance, and the thermal insulation glass is prepared. Due to the large difference between the physical and chemical properties of PC and glass, the thermal insulation slurry cannot be directly used for PC, so that it is necessary to develop a thermal insulation slurry specially used for PC thermal insulation master batch.
Disclosure of Invention
Aiming at the defects in the prior art, the first object of the invention is to provide a spectrally selective thermal insulation slurry for PC thermal insulation master batches, which has the advantages of being well applicable to PC and enabling PC to have spectral selectivity and thermal insulation property.
The second purpose of the invention is to provide a preparation method of the spectrum selective heat insulation slurry for the PC heat insulation master batch, which has the advantage of being capable of preparing the spectrum selective heat insulation slurry for the PC heat insulation master batch.
In order to achieve the first object, the invention provides the following technical scheme: the spectrum selective heat insulation slurry for the PC heat insulation master batch is characterized by comprising the following raw materials in parts by weight:
50-60 parts of a solvent;
15-20 parts of cesium tungstate nano powder;
12-18 parts of a dispersing agent;
2-8 parts of a stabilizer.
By adopting the technical scheme, 50-60 parts of solvent, 15-20 parts of cesium tungstate nano powder, 12-18 parts of dispersant and 2-8 parts of stabilizer are adopted, so that the PC-based composite material is suitable for PC and has the effects of spectral selectivity and heat insulation.
By adding the dispersing agent, the cesium tungstate nano powder is uniformly dispersed in the solvent, and the agglomeration phenomenon of the cesium tungstate nano powder is prevented, so that the performance of the heat insulation slurry is uniform and stable. The nano cesium tungstate has the optimal absorption capacity for the near infrared region (wavelength 800-.
The cesium tungstate nanometer powder can shield most of ultraviolet light and still absorb a small part of ultraviolet light. The ultraviolet absorption rate of the heat insulation slurry can be improved through the addition of the stabilizer, so that a small part of absorbed ultraviolet can be stably absorbed, and the ultraviolet passing through the nano slurry is reduced as much as possible. Thereby further improving the ultraviolet-proof performance of the spectrum selective heat insulation slurry.
Further, the solvent is white kerosene.
Further, the white electric oil is 120# white electric oil.
By adopting the technical scheme, the white dielectric oil has high fat solubility, and can well disperse the cesium tungstate nano powder. The white electricity is divided into 6# white electricity oil and 120# white electricity oil, and the 120# white electricity oil has slow drying property, so that the 120# white electricity oil is used as a solvent, the slurry is not easy to dry, and the effective period of the slurry after the slurry is used is prolonged.
Further, the particle size of the cesium tungstate nano powder is 30-50 nm.
By adopting the technical scheme, when the particle size of the cesium tungstate nano powder particles is 30-50nm, the infrared ray absorption and ultraviolet ray isolation capabilities of the slurry are stronger.
Further, the dispersant is a digao 700 type dispersant.
By adopting the technical scheme, the digao 700 type dispersing agent is suitable for co-grinding, has a deflocculation effect on the cesium tungstate nano powder, can improve the mobility of the cesium tungstate nano particles in a solvent, and simultaneously prevents slurry from coagulating into blocks.
Further, the stabilizer includes a hindered amine type light stabilizer.
By adopting the technical scheme, the hindered amine light stabilizer inhibits the photo-oxidative degradation reaction through various ways such as capturing free radicals, decomposing hydroperoxides and transferring the energy of excited molecules. Meanwhile, the hindered amine light stabilizer is a colorless product, so that the color of the PC cannot be influenced.
Further, the stabilizer also comprises an ultraviolet absorber.
By adopting the technical scheme, the ultraviolet absorbent can well absorb ultraviolet rays, has good thermal stability, and can be matched with cesium tungstate nano-powder to reduce the ultraviolet rays penetrating through nano-slurry as much as possible.
Further, the ultraviolet absorbent is a benzotriazole ultraviolet absorbent.
By adopting the technical scheme, the benzotriazole ultraviolet light absorber and the hindered amine light stabilizer have a synergistic effect, so that the light stability of the slurry is improved exponentially.
In order to achieve the second object, the invention provides the following technical scheme:
a preparation method of spectrum selective heat insulation slurry for PC heat insulation master batches specifically comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersant and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 50-70h, and adding the stabilizer for continuously grinding for 7-12 h.
By adopting the technical scheme, preparation is made for preparing various raw materials and mixing the various raw materials through S1; through S2, uniformly mixing the white gasoline and the nano cesium tungstate powder in a stirrer, so that the nano cesium tungstate is primarily dispersed in the white gasoline; through S3, the nano cesium tungstate powder can be uniformly dispersed in the white gasoline under the action of the dispersing agent, and the ultraviolet resistance of the slurry is improved under the action of the stabilizing agent.
Further, the grinding medium of the nano grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
By adopting the technical scheme, the zirconium silicate with the thickness of 0.2mm is used as a grinding medium, and the method is suitable for the proportion of the slurry in the proportion.
In conclusion, the invention has the following beneficial effects:
1. in the application, the cesium tungstate nano powder is uniformly dispersed in the solvent, so that the agglomeration phenomenon of the cesium tungstate nano powder is prevented, and the performance of the heat insulation slurry is uniform and stable. The nano cesium tungstate has the optimal absorption capacity for the near infrared region (wavelength 800-.
2. The cesium tungstate nanometer powder can shield most of ultraviolet light and still absorb a small part of ultraviolet light. The ultraviolet absorption rate of the heat insulation slurry can be improved through the addition of the stabilizer, so that a small part of absorbed ultraviolet can be stably absorbed, and the ultraviolet passing through the nano slurry is reduced as much as possible. Thereby further improving the ultraviolet-proof performance of the spectrum selective heat insulation slurry.
Drawings
FIG. 1 is a process diagram of a method for preparing a spectrally selective insulating slurry.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples.
First, raw materials sources and equipment model in this application:
the white electric oil is 120# white electric oil sold by the Shanghai Fine chemical industry Co., Ltd;
the cesium tungstate nano powder is sold by Hangzhou Jikang new material limited company;
the dispersant is a Digao 700 type dispersant produced by Dongguan Hao Xinghuaji chemical Co.Ltd;
the hindered amine light stabilizer is an EV-83 light stabilizer purchased from Guangzhou Yicai trade company Limited;
the benzotriazole ultraviolet absorbent is EV-40 type ultraviolet absorbent purchased from Guangzhou Yicai trade company Limited;
the stirrer adopts a GF1100 high-speed dispersion machine produced by Shanghai micro special motor company Limited;
the nano grinding equipment adopts an INT-5 type horizontal nano sand mill produced by Dalingshan Yifu mechanical equipment factory of Dongguan city;
PC masterbatch was purchased from jiesen plastification ltd, yao, germany bayer injection grade PC granules, grade 2405.
Secondly, a spectrum selective heat insulation slurry for PC heat insulation master batch and a preparation process thereof:
with reference to figure 1 of the drawings,
example 1:
the spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
50 parts of a solvent;
15 parts of cesium tungstate nano powder;
12 parts of a dispersing agent;
and 2 parts of a stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 30 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer comprises a hindered amine type light stabilizer, and an EV-83 type light stabilizer is adopted in the application;
the stabilizer also comprises an ultraviolet absorbent, wherein the ultraviolet absorbent is a benzotriazole ultraviolet absorbent, and an EV-40 type ultraviolet absorbent is adopted in the application;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 50 hours, and adding the stabilizing agent for continuously grinding for 7 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
Example 2:
the spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
55 parts of a solvent;
17 parts of cesium tungstate nano powder;
14 parts of a dispersing agent;
3 parts of a stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 35 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer comprises a hindered amine type light stabilizer, and an EV-83 type light stabilizer is adopted in the application;
the stabilizer also comprises an ultraviolet absorbent, wherein the ultraviolet absorbent is a benzotriazole ultraviolet absorbent, and an EV-40 type ultraviolet absorbent is adopted in the application;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 55 hours, and adding the stabilizing agent for continuously grinding for 9 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
Example 3:
the spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
55 parts of a solvent;
17 parts of cesium tungstate nano powder;
15 parts of a dispersing agent;
5 parts of a stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 40 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer comprises a hindered amine type light stabilizer, and an EV-83 type light stabilizer is adopted in the application;
the stabilizer also comprises an ultraviolet absorbent, wherein the ultraviolet absorbent is a benzotriazole ultraviolet absorbent, and an EV-40 type ultraviolet absorbent is adopted in the application;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 60 hours, and adding the stabilizing agent for continuously grinding for 10 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
Example 4:
the spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
58 parts of a solvent;
18 parts of cesium tungstate nano powder;
16 parts of a dispersing agent;
6 parts of a stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 45 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer comprises a hindered amine type light stabilizer, and an EV-83 type light stabilizer is adopted in the application;
the stabilizer also comprises an ultraviolet absorbent, wherein the ultraviolet absorbent is a benzotriazole ultraviolet absorbent, and an EV-40 type ultraviolet absorbent is adopted in the application;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 65 hours, and adding the stabilizing agent for continuously grinding for 10 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
Example 5:
the spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
60 parts of a solvent;
20 parts of cesium tungstate nano powder;
18 parts of a dispersing agent;
8 parts of a stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 50 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer comprises a hindered amine type light stabilizer, and an EV-83 type light stabilizer is adopted in the application;
the stabilizer also comprises an ultraviolet absorbent, wherein the ultraviolet absorbent is a benzotriazole ultraviolet absorbent, and an EV-40 type ultraviolet absorbent is adopted in the application;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 70 hours, and adding the stabilizing agent for continuously grinding for 12 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
Comparative example 1:
the spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
55 parts of a solvent;
17 parts of cesium tungstate nano powder;
15 parts of a dispersing agent;
wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 40 nm;
the dispersant is a digao 700 type dispersant.
The preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 60 hours, and adding the stabilizing agent for continuously grinding for 10 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
Comparative example 2:
the spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
55 parts of a solvent;
17 parts of cesium tungstate nano powder;
15 parts of a dispersing agent;
1 part of stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 40 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer includes hindered amine type light stabilizer, and EV-83 type light stabilizer is adopted in the embodiment;
the stabilizer also comprises an ultraviolet absorbent, wherein the ultraviolet absorbent is a benzotriazole ultraviolet absorbent, and the EV-40 type ultraviolet absorbent is adopted in the embodiment;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 60 hours, and adding the stabilizing agent for continuously grinding for 10 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
Comparative example 3
The spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
55 parts of a solvent;
17 parts of cesium tungstate nano powder;
5 parts of a dispersing agent;
1 part of stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 40 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer includes hindered amine type light stabilizer, and EV-83 type light stabilizer is adopted in the embodiment;
the stabilizer also comprises an ultraviolet absorbent, wherein the ultraviolet absorbent is a benzotriazole ultraviolet absorbent, and the EV-40 type ultraviolet absorbent is adopted in the embodiment;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 60 hours, and adding the stabilizing agent for continuously grinding for 10 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
Comparative example 4
The spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
55 parts of a solvent;
17 parts of cesium tungstate nano powder;
15 parts of a dispersing agent;
5 parts of a stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 40 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer includes only hindered amine type light stabilizer, and EV-83 type light stabilizer is used in this example;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 60 hours, and adding the stabilizing agent for continuously grinding for 10 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
In a comparative example 5,
the spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
55 parts of a solvent;
17 parts of cesium tungstate nano powder;
15 parts of a dispersing agent;
5 parts of a stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 40 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer only comprises an ultraviolet absorbent, the ultraviolet absorbent is a benzotriazole ultraviolet absorbent, and the EV-40 type ultraviolet absorbent is adopted in the embodiment;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 60 hours, and adding the stabilizing agent for continuously grinding for 10 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
Comparative example 6:
the spectrum selective heat insulation slurry for the PC heat insulation master batch is prepared from the following raw materials in parts by weight:
55 parts of a solvent;
17 parts of cesium tungstate nano powder;
15 parts of a dispersing agent;
5 parts of a stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 40 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer includes hindered amine type light stabilizer, and EV-83 type light stabilizer is adopted in the embodiment;
the stabilizer also comprises an ultraviolet absorbent, wherein the ultraviolet absorbent is a benzotriazole ultraviolet absorbent, and the EV-40 type ultraviolet absorbent is adopted in the embodiment;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white gasoline and the nano cesium tungstate powder into an ultrasonic disperser for dispersing for 60 hours, adding the stabilizing agent, and continuously grinding for 10 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
And thirdly, respectively preparing 5kg of the sizing agents of the examples 1 to 5 and the comparative examples 1 to 5, grouping the sizing agents, adding the sizing agents of all groups and 95kg of PC master batches into an extruder together, mixing, extruding and granulating to form the spectrally selective PC particles.
Adding 1 part by weight of the spectrally selective PC particles and 99 parts by weight of the PC master batch, uniformly mixing, and adding into an injection molding machine to form a PC plate with the thickness of 1 mm.
The PC board is subjected to performance detection by using a transmittance detector, and the result is as follows
From the above experimental data, it can be seen that the spectrally selective thermal insulation slurry for PC thermal insulation masterbatch in examples 1 to 5 is prepared from the following raw materials in parts by weight:
50-60 parts of a solvent;
15-20 parts of cesium tungstate nano powder;
12-18 parts of a dispersing agent;
2-8 parts of a stabilizer.
Wherein the solvent is white petrolatum, and is No. 120 white petrolatum;
the particle size of the cesium tungstate nano powder is 30-50 nm;
the dispersant is a digao 700 type dispersant;
the stabilizer comprises a hindered amine type light stabilizer, and an EV-83 type light stabilizer is adopted in the application;
the stabilizer also comprises an ultraviolet absorbent, wherein the ultraviolet absorbent is a benzotriazole ultraviolet absorbent, and an EV-40 type ultraviolet absorbent is adopted in the application;
the preparation process of the spectrum selective heat insulation slurry for the PC heat insulation master batch comprises the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersing agent and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 50 hours, and adding the stabilizing agent for continuously grinding for 7 hours.
Wherein, the grinding medium of the nanometer grinding equipment is zirconium silicate, and the particle size of the zirconium silicate is 0.2 mm.
Under the condition, the prepared PC board with the thickness of 1mm has the infrared ray blocking rate of over 85 percent, the ultraviolet ray blocking rate of over 99 percent and the light transmittance of over 72 percent, thereby having good comprehensive performance.
Comparing example 3 with comparative example 6, it can be seen that compared with the method of dispersing nanoparticles in comparative example 6, the method of dispersing nanoparticles in the present application uses a nano-milling apparatus to mill the nanoparticles, and the produced slurry is further prepared into PC particles and then injection-molded into PC boards, which have better infrared blocking rate, ultraviolet blocking rate and light transmittance.
In the actual operation process, the applicant finds that when the dispersion is carried out by using ultrasonic waves, the temperature of nano cesium tungstate powder particles is increased, so that agglomeration is easily formed, uniform dispersion of the nano cesium tungstate powder particles is not facilitated, and various performances of the nano cesium tungstate powder particles are deteriorated. The raw material components and the preparation process corresponding to the application are utilized to prepare the spectrum selective heat insulation slurry, and the produced heat insulation slurry has good performance in the aspects of infrared ray blocking rate, ultraviolet ray blocking rate and light transmittance when being mixed with PC particles and then being subjected to injection molding.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. The spectrum selective heat insulation slurry for the PC heat insulation master batch is characterized by being prepared from the following raw materials in parts by weight:
50-60 parts of white kerosene;
15-20 parts of cesium tungstate nano powder;
12-18 parts of a dispersing agent;
2-8 parts of a stabilizer, wherein the dispersant is a 700-type dispersant, and the particle size of the cesium tungstate nano powder is 30-50 nm.
2. The spectrally selective thermal insulation slurry for PC thermal insulation masterbatch according to claim 1, wherein the white electric oil is 120# white electric oil.
3. The spectrally selective thermal insulation paste for PC thermal insulation masterbatch according to claim 1, wherein the stabilizer comprises a hindered amine-type light stabilizer.
4. The spectrally selective thermal insulation paste for PC thermal insulation masterbatches according to claim 3, wherein the stabilizer further comprises an ultraviolet absorber.
5. The spectrally selective thermal insulation paste for PC thermal insulation masterbatches according to claim 4, wherein the ultraviolet absorber is a benzotriazole-based ultraviolet absorber.
6. The preparation method of the spectrally selective thermal insulation slurry for the PC thermal insulation masterbatch of any one of claims 1 to 5, which is characterized by comprising the following steps:
s1, preparing a solvent, cesium tungstate nano powder, a dispersant and a stabilizer according to a ratio;
s2, adding the white gasoline and the nano cesium tungstate powder into a stirrer, and quickly stirring for 20min under the condition of 3000 r/min;
and S3, after S2 is finished, adding the dispersant and the mixture of the white spirit and the nano cesium tungstate powder into nano grinding equipment for grinding for 50-70h, and adding the stabilizer for continuously grinding for 7-12 h.
7. The method for preparing the spectrally selective thermal insulation slurry for PC thermal insulation masterbatch of claim 6 wherein the grinding medium of the nano-grinding device is zirconium silicate, the particle size of which is 0.2 mm.
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