CN108360268B

CN108360268B - Preparation method of indoor curtain adopting heat-insulating coating

Info

Publication number: CN108360268B
Application number: CN201810028726.4A
Authority: CN
Inventors: 高彦峰; 孙怡婷
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2018-01-12
Filing date: 2018-01-12
Publication date: 2021-06-04
Anticipated expiration: 2038-01-12
Also published as: CN108360268A

Abstract

The invention provides a preparation method of an indoor curtain adopting a heat insulation coating. The heat insulation coating is prepared by dispersing heat insulation powder and an auxiliary agent with heat insulation performance in an organic solvent, mixing the dispersion liquid with resin in a certain mode, and fixing the heat insulation coating on curtain cloth, so that the heat insulation coating has a heat insulation function and reduces indoor temperature.

Description

Preparation method of indoor curtain adopting heat-insulating coating

Technical Field

The invention belongs to the technical field of heat-insulating textile materials, and particularly relates to a preparation method of an indoor heat-insulating curtain adopting heat-insulating coating.

Background

With the development of society, high-rise buildings are emerging continuously, and modern buildings use a large amount of thin and transparent external materials such as glass and plastics, which inevitably cause sunlight to enter the room and cause the indoor temperature to rise while improving the indoor lighting. In order to balance the indoor temperature rise caused by the incident sunlight, people generally use an air conditioner to cool, which is also a great source of energy consumption in summer in China. According to incomplete statistics, the energy consumption of the window of the house accounts for 30% -50% of the overall energy consumption of the house, and under the condition, the physiological comfort and the economic benefit brought by the heat insulation curtain are particularly important.

The heat insulation curtain is used for blocking sunlight (mainly in a near infrared band which accounts for 50% of total heat of the sunlight) through heat insulation after finishing, so that the rise of indoor temperature is inhibited, the comfort of people is improved, and energy consumption and carbon dioxide emission are reduced. The cesium tungsten bronze, tin antimony oxide, indium tin oxide, zinc aluminum oxide, zinc gallium oxide and other powders have excellent infrared shielding performance and play a role in heat insulation. When the heat-insulating powder is in a nanometer level, the absorption rate of the heat-insulating powder to visible light is extremely weak, and the heat-insulating powder has high transparency and is a preferred transparent heat-insulating material. One or more of the heat-insulating powder is used for finishing the curtain, so that the curtain with the heat-insulating and temperature-reducing functions can be obtained. At present, several types of heat-insulating curtains are published at home and abroad, but all have some defects, such as:

1. chinese patent publication No. CN204532002U discloses an inflatable heat-insulating curtain, wherein a heat-reflecting coating is coated on the outer side of the curtain body, an electric scroll and an inflatable air suction pump are connected with a processor, and an air bag is arranged in the curtain body, and after the air bag is inflated, a plurality of independent air chambers are formed in the air bag, so as to achieve the effects of heat insulation and heat preservation. But the internal structure of the airbag is excessively complicated.

2. Chinese patent publication No. CN203399947U discloses a heat-insulating curtain fabric, whose base fabric is woven from warp metal reflective filaments and weft nano-fiber filaments, and the base fabric is heated by far-infrared emitting material and converted into infrared radiation to be reflected back to the outside, so that the curtain fabric has heat-insulating property. However, the metal reflecting wires are aluminum foil strips or aluminum film strips, the aluminum foil is made of metal materials, infrared rays formed after heat absorption leak into a room, and the room is easy to age and demould after being stretched for a long time.

3. Chinese patent publication No. CN2102561039A discloses a thermal insulation coating for outdoor textiles, and a preparation method and application thereof, wherein the components mainly comprise silicon dioxide, aluminum oxide, zinc oxide, rutile titanium dioxide, glue, a dispersant, toluene, acetone, and the like. The coating is applied to synthetic fibers such as terylene, acrylic and the like, and can obtain obvious cooling effect. But the drying is carried out at 150 ℃, and the washing resistance is not optimistic because of adding the rutile type titanium dioxide with larger grain diameter.

The invention has the advantages that: the adopted heat-insulating powder has good near-infrared light shielding property, and directly blocks the heat from transferring to the indoor space; meanwhile, the high visible light transmittance of the heat-insulating nano powder has little influence on the thin permeability of the curtain, and the problem that part of the curtain is not light-insulating and heat-insulating is solved; the use of the G01 nano silicon oxide can lead the heat-insulating coating to have the characteristics of anti-caking and anti-sagging. The titanium dioxide (P25) can well improve the adhesion, aging resistance and scrubbing resistance of the coating; the addition of the solvent type acrylic resin greatly improves the water washing resistance of the heat-insulating curtain; can be dried at room temperature, and the coating operation is simple and convenient.

Because of easy drying and good washing resistance, the heat insulation coating provided by the invention can also be prepared into a spray and directly sprayed on clothes, so that the clothes have the effects of heat insulation and temperature reduction.

Disclosure of Invention

The invention aims to provide a preparation method of an indoor heat-insulating curtain adopting heat-insulating coating, which is characterized by comprising the following steps:

a, preparation of thermal insulation coating

a, preparation of a dispersion of a heat-insulating powder

The heat insulation powder adopts any one or two of cesium tungsten bronze nano powder, indium tin oxide nano powder and tin antimony oxide nano powder, and optimally adopts the cesium tungsten bronze and the indium tin oxide nano powder;

also, nano-silica (G01), titanium dioxide (P25);

dispersing the heat insulation powder in any one of organic solvent toluene, absolute ethyl alcohol or n-butyl alcohol to obtain heat insulation powder dispersion liquid;

the mass percentage of the heat insulation powder in the dispersion liquid is 2.5-25%, and the best mass percentage is that the cesium tungsten bronze nanometer powder accounts for 1-10%, and the indium tin oxide nanometer powder accounts for 1-5%; the mass percent of the G01 nano silicon oxide is 0.1-5%, the mass percent of the titanium dioxide (P25) is 0.1-5%, the mass percent of the dispersant is 1-10%, and the dispersion time is 10-50 h;

b, preparation of acrylic resin organic solution

Adding solvent type acrylic resin into absolute ethyl alcohol for dissolving, wherein the mass percent of the acrylic resin is 1-15%, and preparing an acrylic resin organic solution;

c, preparation of thermal insulation coating

And adding the heat insulation powder dispersion liquid into the acrylic resin organic solution, wherein the ratio of the heat insulation powder dispersion liquid to the acrylic resin organic solution is 1: 1-1: 2, and uniformly mixing to obtain the heat insulation coating.

B, preparation of thermal insulation curtain

Cutting a curtain fabric into 35cm multiplied by 55cm, soaking the curtain fabric in a 15% sodium hydroxide aqueous solution for 1-2 days, and taking out the curtain fabric for later use;

b, dip-coating the curtain fabric and performing ultrasonic treatment for 1-10 minutes at 20-600W to enable the heat-insulating coating to be completely combined with the curtain substrate;

and c, taking out the curtain cloth, and naturally drying or drying the curtain cloth by cold air after the redundant liquid on the curtain cloth flows out to obtain the heat insulation curtain.

Drawings

Fig. 1 is a uv-vis-nir optical transmittance spectrum of the thermal insulation window covering prepared in example 1.

Fig. 2 is a water washing resistance test of the thermal insulation window curtain prepared in example 1.

Fig. 3 is a simulation test of the actual temperature adjusting effect of the thermal insulation window curtain prepared in example 1.

Fig. 4 is a graph showing the temperature difference of insulation of the insulation window covering prepared in example 1.

Fig. 5 is a water-washing resistance test of the thermal insulation window covering prepared in comparative example 1.

Detailed Description

The invention is further illustrated by the following examples.

The invention uses the sunshine cloth as the base body (the material of the base body can be nylon, terylene, etc.), and then fixes the heat insulation powder (any one or a mixture of a plurality of heat insulation powder with infrared shielding performance such as cesium tungsten bronze, tin antimony oxide, indium tin oxide, etc.) and the heat insulation coating based on the solvent type acrylic resin on the base body in a certain mode, so that the base body becomes a heat insulation curtain and has the functions of heat insulation and temperature reduction. The heat insulation curtain comprises a curtain base body and heat insulation powder uniformly adhered to the surface of the base fiber. Wherein the content of the powder adhered to the surface of the curtain base fiber is 1-25%. The content is too low, and the heat insulation effect is poor; if the content is too high, the visible light transmittance of the heat-insulating curtain is reduced, the color of the curtain is deepened, and the visual effect is influenced. Wherein the particle size of the heat insulation powder is 1-3000 nm. Preferably, the particle size of the heat insulation powder is 1-100 nm.

The following exemplarily illustrates a method for manufacturing the curtain with heat insulation and temperature reduction functions provided by the invention.

And (3) preparing cesium tungsten bronze nano powder. And preparing the cesium tungsten bronze nano powder by using a solid-phase sintering method.

Indium tin oxide nanopowders are commercially available.

And (4) preparing a dispersion liquid. According to the invention, cesium tungsten bronze with the particle size of 1-100 nm, indium tin oxide nano powder, an organic solvent, a dispersing agent, nano silicon oxide (G01) and titanium dioxide (P25) are uniformly mixed according to a certain proportion, zirconia balls are added to be ground for 20-50 h, and the zirconia balls are filtered to obtain a nano dispersion liquid. The addition of the dispersant and zirconia balls helps to crush the particles and prevents the crushed particles from agglomerating while maintaining the stability of the dispersion.

And (4) preparing the heat-insulating coating. In the invention, a solvent type acrylic resin is dissolved in an organic solvent, wherein the ratio of the acrylic resin to the organic solvent is 1: 20 (namely 5%) by mass, and adding the prepared dispersion liquid, wherein the mass percentage of the powder dispersion liquid in the heat-insulating coating is 30-50%.

The preparation of the heat-insulating curtain by the dip coating method provided by the invention is exemplarily described below.

And completely immersing the cleaned curtain substrate in the obtained heat insulation coating. Performing ultrasonic treatment for 1-10 minutes at 20-600W to ensure that the heat insulation coating is completely combined with the curtain substrate. Taking out, and naturally drying or drying with cold air until the redundant liquid on the curtain is completely drained.

Example 1

A preparation method of a curtain with heat insulation and temperature reduction functions comprises the following steps:

(1) adding 4G of dispersing agent, 6G of cesium tungsten bronze nano powder and 4G of indium tin oxide nano powder into 36G of absolute ethyl alcohol, then sequentially adding 0.5G of nano silicon oxide (G01) and 0.5G of titanium dioxide (P25), and sanding for 24 hours by using zirconia balls to obtain a nano dispersion liquid of cesium tungsten bronze and indium tin oxide;

(2) adding 25g of acrylic resin into 463g of absolute ethyl alcohol, adding 55g of the dispersion prepared in the step (1) after the resin is completely dissolved, and magnetically stirring for 1h to prepare the heat-insulating coating;

(3) and (3) cleaning a 35 cm-55 cm-sunlight cloth, immersing the cloth in the heat-insulating coating prepared in the step (2), and performing ultrasonic treatment at 600W for 5 minutes to ensure that the finishing agent is completely combined with the curtain substrate. After the curtain is taken out, the curtain is naturally dried or dried by cold air after the redundant liquid on the curtain flows out.

The ultraviolet-visible-near infrared light transmittance, the actual temperature control effect and the washing fastness of the prepared heat insulation curtain are tested, and the results show that: the curtain treated by the finishing agent has little reduction of the transmittance in a visible light region, but has obvious reduction of the transmittance in a near infrared region, namely has obvious shielding effect on the near infrared region; solar energy can be well and practically regulated in an actual temperature control effect test, and compared with an untreated curtain, the indoor temperature is obviously reduced; the water washing resistance of the heat insulation curtain is enhanced.

Fig. 1 is a uv-vis-nir optical transmittance spectrum of the thermal insulation window covering prepared in example 1, and the test results show that: compared with the untreated curtain, the curtain treated by the finishing agent has the advantages that the transmittance in a visible light region is reduced slightly, and the transmittance in a near infrared region is obviously reduced (figure 1), so that the solar energy regulation and control efficiency is higher, and the transmission of visible light can not be influenced as much as possible while near infrared light is shielded.

Fig. 2 is a water washing resistance test of the thermal insulation curtain prepared in example 1, in order to detect the temperature adjusting effect and the water washing resistance of the textile, the thermal insulation curtain is washed 0, 4, 8 and 12 times (1 time washing is equivalent to 5 times washing in a household washing machine) by an accelerated washing method of AATCC test method 61-1996, test No. 2a, and then the change of the transmittance is measured by an ultraviolet-visible-near infrared spectrophotometer (fig. 2). The results show that: compared with the prior art, the heat-insulating curtain has the advantages that the transmittance in the near-infrared region is slightly increased before washing, but the heat-insulating curtain still has good near-infrared shielding effect, which shows that the water washing resistance is good.

Fig. 3 is a simulation test of the actual temperature adjusting effect of the thermal insulation window curtain prepared in example 1. The untreated sunshine cloth of 35cm x 55cm and the heat insulation curtain are respectively stuck on the small houses at the left and the right sides. The irradiation of high-power infrared lamps is used for simulating the sunlight irradiation in summer, and observation is carried out after 10 minutes, because of the near-infrared shielding effect of the heat-insulating nano powder, the indoor temperature at the left side is obviously lower than that of the right room (figure 3), and the temperature difference can reach 4.9 ℃ (figure 4).

Comparative example 1

Taking a nano dispersion liquid of only mixed cesium tungsten bronze and indium tin oxide, and mixing the nano dispersion liquid with absolute ethyl alcohol in a ratio of 1: 10, and attaching the finishing liquid to the curtain substrate by using a dip coating method. The ultraviolet-visible-near infrared light transmittance and the washing fastness of the prepared heat insulation curtain are tested, and the results show that: before washing, compared with the thermal insulation curtain added with acrylic resin, the transmittance in the near infrared region is obviously improved. After the comparative sample is washed for 4 times according to AATCC Test method 61-2003 Test number 2A, the curve of the infrared band transmittance is almost overlapped with the untreated curtain substrate, and no obvious difference exists, which shows that the solar energy blocking capability of the curtain is rapidly reduced along with the increase of the washing times, and the solar energy regulation and control efficiency almost completely disappears (figure 5).

Claims

1. A preparation method of an indoor heat insulation curtain adopting heat insulation coating is characterized by comprising the following steps:

(1) adding 4G of dispersing agent, 6G of cesium tungsten bronze nano powder and 4G of indium tin oxide nano powder into 36G of absolute ethyl alcohol, then sequentially adding 0.5G of nano silicon oxide G01 and 0.5G of titanium dioxide P25, adding zirconia balls, grinding for 20-50 h, filtering the zirconia balls out, and obtaining a nano dispersion liquid of cesium tungsten bronze and indium tin oxide;

(2) adding 25g of acrylic resin into 463g of absolute ethyl alcohol, adding 55g of the nano dispersion prepared in the step (1) after the acrylic resin is completely dissolved, and magnetically stirring for 1h to prepare the heat-insulating coating;

(3) cleaning a 35 cm-55 cm-long sunshine cloth, immersing the cloth in the heat insulation coating prepared in the step (2), and performing ultrasonic treatment for 5-10 minutes at 20-600W to enable the finishing agent to be completely combined with the curtain substrate; after the curtain is taken out, the curtain is naturally dried or dried by cold air after the redundant liquid on the curtain flows out, and the heat insulation curtain is obtained; the prepared heat insulation curtain comprises a curtain base body and heat insulation powder which is uniformly adhered to the surface of base fiber; wherein the content of the powder adhered to the surface of the curtain base fiber is 1-25%, and the particle size of the heat insulation powder is 1-100 nm.