CN110093776B - Preparation method of photothermal conversion heat storage and temperature regulation cotton fabric - Google Patents
Preparation method of photothermal conversion heat storage and temperature regulation cotton fabric Download PDFInfo
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- CN110093776B CN110093776B CN201910397343.9A CN201910397343A CN110093776B CN 110093776 B CN110093776 B CN 110093776B CN 201910397343 A CN201910397343 A CN 201910397343A CN 110093776 B CN110093776 B CN 110093776B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
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Abstract
The invention relates to a preparation method of a photothermal conversion heat storage and temperature regulation cotton fabric, which comprises the following steps of spraying graphene oxide on the surface of the cotton fabric, reducing the graphene oxide into graphene to obtain the photothermal conversion heat storage and temperature regulation cotton fabric, and specifically comprises the following steps: firstly, cleaning cotton fabric, then air-drying, then preparing graphene oxide solution, stirring and uniformly mixing at room temperature, then uniformly spraying the graphene oxide solution on the surface of the cotton fabric by using a nano spraying instrument, drying, and finally carrying out reduction treatment on the cotton fabric to prepare the photothermal conversion heat storage temperature-regulating cotton fabric. The preparation method disclosed by the invention is simple to operate, mild in condition, low in cost, suitable for large-scale production, and excellent in use value and popularization value, and the fabric prepared by the preparation method disclosed by the invention has good photo-thermal conversion capability, is stable in photo-thermal conversion capability, and has huge application potential.
Description
Technical Field
The invention belongs to the technical field of photo-thermal conversion materials, and relates to a preparation method of a photo-thermal conversion heat storage and temperature regulation cotton fabric.
Background
The heat-storage temperature-regulating textile is bonded on the surface of the textile or is implanted into fibers through a low-temperature phase-change substance, so that the textile has the functions of automatically absorbing, storing, redistributing and releasing heat energy when the temperature of the external environment changes, liquid-solid phase transition is generated to release heat when the temperature of the environment is lower than a set value, so that the interior of the textile is kept at a higher temperature, and solid-liquid phase transition is generated to absorb heat when the temperature of the environment is higher than the set value, so that the interior of the textile is kept at a lower temperature, and the temperature of the textile is kept in a more comfortable range. The heat storage and temperature regulation textile is an intelligent textile, and is the most important comfort textile technology in more than twenty years since the appearance of waterproof and moisture permeable fabrics.
The photothermal conversion nano material is a functional material which can absorb certain light, particularly near infrared light, and generate heat through plasma resonance or an energy transition zone to realize local temperature rise, and is favored because the material can convert the near infrared light into heat energy, so that the photothermal conversion nano material has wide application prospects in the fields of biological application, external treatment, clothing and the like, and is a great research hotspot at present.
Graphene is a polymer made of carbon atoms in sp2The hybrid tracks form a hexagonal honeycomb lattice two-dimensional carbon nanomaterial. Due to the unique structure of the graphene, the graphene has excellent optical, thermodynamic, electrical and mechanical properties. Under the irradiation of near infrared light, graphene has strong optical absorption performance and heating characteristic. Under the excitation of light, thermal electrons deviated from an equilibrium state in the graphene gradually transfer energy to other atoms on the surface through the scattering effect of electrons-electrons and electrons-phonons to cause lattice vibration and surface temperature rise, so that the aim of converting light into heat is fulfilled, and therefore heat storage and temperature regulation are achieved.
However, at present, few researches on the preparation of heat storage and temperature regulation fabrics by using graphene exist, and the performance of the existing heat storage and temperature regulation fabrics cannot meet the use requirements.
Therefore, the development of the graphene-based photo-thermal conversion heat storage and temperature regulation cotton fabric has a practical significance.
Disclosure of Invention
The invention aims to solve the problem that the performance of the existing heat-storage temperature-regulating fabric in the prior art can not meet the use requirement, and provides a preparation method of a light-heat conversion heat-storage temperature-regulating cotton fabric. The preparation method provided by the invention is simple to operate, the raw materials are easy to obtain, the consumed time is less, the prepared photo-thermal conversion heat-storage temperature-regulating cotton fabric can rapidly generate heat under infrared light, the highest temperature is within an acceptable range of a human body, the photo-thermal conversion heat-storage temperature-regulating cotton fabric can still maintain the original photo-thermal conversion capability after being washed for many times and irradiated by infrared light for many times, the stability is good, and the application prospect is wide and the application value is great.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of a photothermal conversion heat storage and temperature regulation cotton fabric comprises the steps of spraying graphene oxide on the surface of the cotton fabric, and reducing the graphene oxide into graphene to obtain the photothermal conversion heat storage and temperature regulation cotton fabric;
under the irradiation of an infrared light source, the time required for the temperature of the photothermal conversion heat storage and temperature regulation cotton fabric to rise from 32.5 ℃ to 65 ℃ is 200-250 s, and after the infrared light source is removed, the time required for the temperature of the photothermal conversion heat storage and temperature regulation cotton fabric to fall from 65 ℃ to 35 ℃ is 250-280 s.
The preparation method of the invention can be used for treating cotton fabrics and other types of fabrics to prepare the photothermal conversion heat storage and temperature regulation fabric. The invention only takes cotton fabric as an example, and the cotton fabric is selected as the base material because the cotton fabric has good hygroscopicity, air permeability, light resistance and dyeability, is comfortable to wear and has soft hand feeling.
According to the invention, the graphene oxide is combined with the cotton fabric firstly, and then the graphene oxide is reduced, so that the combination fastness of the graphene and the cotton fabric is improved, the loading capacity of the graphene on the surface of the cotton fabric is improved, the graphene oxide functional groups are rich and can be combined with active groups such as hydroxyl on the surface of the cotton fabric, the graphene oxide is uniformly dispersed on the surface of the cotton fabric through the combination of the graphene oxide and the cotton fabric, and the loading capacity of the graphene oxide is further improved.
According to the invention, the graphene oxide can be more uniformly dispersed on the surface of the cotton fabric by adopting a spraying (namely spray deposition) mode, the spray deposition technology is simple to operate, the resource utilization rate is high, no solvent is left, after spraying, the graphene oxide is deposited on the surface of the fabric, and then the graphene is formed by reduction treatment, so that the fabric can be endowed with an excellent photo-thermal conversion heat storage and temperature regulation function. In addition, the loaded graphene does not change the plain weave structure of the cotton fabric, the basic morphology of the fibers is still maintained, and the graphene is loaded on the surface of a single fiber and does not block gaps of warps and wefts, so that the influence on the air permeability of the fabric is small.
As a preferred technical scheme:
according to the preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric, the content of graphene oxide on the cotton fabric before reduction is 2.2-4.5 wt%. The content of graphene oxide on the cotton fabric before reduction is not limited to the above, and can be specifically adjusted by adjusting the process.
The preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric comprises the following steps:
1) the cotton fabric is cleaned and then dried in the air, and the purpose of cleaning is to remove impurities such as grease on the surface of the cotton fabric and facilitate the combination of the graphene oxide and the cotton fabric;
2) preparing a graphene oxide solution, and uniformly stirring at room temperature;
3) uniformly spraying a graphene oxide solution on the surface of the cotton fabric prepared in the step 1) by using a nano spraying instrument, and drying, wherein the drying after spraying is mainly used for removing water in the fabric, the drying can not be carried out when the water content of the fabric is lower, the drying after spraying is not used for influencing the form of the graphene oxide, and the form formed in the spraying process can only be shaped;
4) and 3) carrying out reduction treatment on the cotton fabric prepared in the step 3) to prepare the photo-thermal conversion heat storage and temperature regulation cotton fabric, wherein graphene oxide is changed into graphene in the reduction process.
According to the preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric, the solution for cleaning is a washing powder aqueous solution, wherein the ratio of the mass of the washing powder to the volume of water is 1g:100 mL; the cleaning temperature is 50 +/-5 ℃, and the cleaning time is 20-40 min. The detergent of the present invention is not limited to washing powder aqueous solution, and any substance capable of realizing fabric cleaning effect can be applied to the present invention.
According to the preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric, the cotton fabric is rinsed by water after being cleaned and before being dried in the air.
According to the preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric, the cotton fabric is cleaned and dried in the air, and then is pretreated, and the steps are as follows:
1) hydrophilic treatment: mixing 1 part of 35% ammonia water and 5 parts of deionized water according to the volume part, heating to 60 ℃, adding 1 part of 30% hydrogen peroxide to obtain hydrophilic treatment liquid, soaking the cotton fabric in the hydrophilic treatment liquid for 10 minutes, taking out the cotton fabric, and washing with the deionized water, wherein the bath ratio (namely the mass ratio of the cotton fabric to the hydrophilic treatment liquid) is 1: 50;
2) cation modification: immersing the cotton fabric into a cationic modifying solution consisting of a cationic modifying agent and NaOH, carrying out ultrasonic treatment, taking out, washing with deionized water, and drying, wherein the process parameters are as follows: the concentration of NaOH in the cationic modification liquid is 1.0g/L, the dosage of the cationic modification agent is 8 owf% (namely the mass ratio of the cotton fabric to the cationic modification agent is 8:100), the temperature is 30 ℃, the bath ratio (namely the mass ratio of the cotton fabric to the cationic modification liquid) is 1:30, and the time is 5 minutes.
The comfort of the fabric can be improved after hydrophilic treatment, the relative humidity between the fabric and the skin needs to be relatively reduced under the damp and hot conditions, so that the fiber material is required to have large water vapor absorption capacity and high absorption speed, and particularly under the condition of large amount of sweating, the fiber is required to have higher moisture absorption and water absorption and quickly release sweat to the outside, so that the human body does not feel stuffy feeling, the accessibility of the cotton fabric to a cationic modifier is increased, and the subsequent cationic modification treatment is facilitated;
the cation modification can improve the binding fastness of the graphene oxide and the fabric, the fabric after the cation modification has positive charges, the graphene oxide has negative charges, the graphene oxide and the fabric attract each other, the binding fastness is high, and the washing resistance is excellent.
According to the preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric, the concentration of the graphene oxide solution is 2mg/mL, the stirring is magnetic stirring, and the time is 2 hours.
According to the preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric, the graphene oxide solution is subjected to ultrasonic dispersion treatment for 10min before spraying, the graphene oxide is easy to agglomerate, the phenomenon can be effectively avoided through the ultrasonic dispersion treatment, and the graphene oxide is uniformly dispersed in the solution.
According to the preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric, the infrared lamp is adopted to dry the cotton fabric in the spraying process, the form of graphene oxide can be changed due to the infrared lamp drying, so that the graphene oxide on the surface of the sprayed cotton fabric is of a curled wrinkle structure, namely, after the spraying of a nano spraying instrument and the drying of the infrared lamp, the graphene oxide of a sheet layer in a solution is changed into the curled wrinkle structure and is deposited on the surface of the fabric, in the subsequent reduction process, the curled wrinkle structure is not changed, only the graphene oxide is changed into the graphene in the reduction process, the specific surface area of the curled wrinkle structure is larger, the photothermal conversion efficiency is higher, and the fabric can be endowed with an excellent photothermal conversion heat storage and temperature regulation function.
According to the preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric, the reduction adopts a high-temperature heat treatment mode. The reduction method is not limited to this, and may be specifically selected according to the ease of handling, and graphene oxide is changed to graphene during the reduction process, but the morphology remains unchanged and the graphene is still in a curled wrinkle structure.
According to the preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric, the reduction temperature is 200 ℃ and the time is 10 min. The temperature and time of the reduction are not limited to these, and may be specifically adjusted according to the characteristics of the cotton fabric, the characteristics of the graphene oxide, and the like.
Advantageous effects
(1) The method has the advantages of simple operation, less time consumption, low cost and mild preparation conditions, and is suitable for large-scale batch production;
(2) the photothermal conversion heat storage and temperature regulation cotton fabric prepared by the method has the advantage of high photothermal conversion speed, has the final temperature within the human body bearing range, and has wide application prospect and great use value;
(3) the photothermal conversion heat-storage temperature-regulating cotton fabric prepared by the method still keeps the initial photothermal conversion capability after being irradiated by infrared light for multiple times and washed for multiple times, and has good stability.
Drawings
FIG. 1 is a photo-thermal conversion heat storage temperature regulation curve of the photo-thermal conversion heat storage temperature regulation cotton fabric prepared by the method;
FIG. 2 is a photo-thermal conversion fatigue resistance test curve of the photo-thermal conversion heat storage and temperature regulation cotton fabric manufactured by the method;
FIG. 3 is a photo-thermal conversion capacity comparison graph of the photo-thermal conversion heat storage and temperature regulation cotton fabric prepared by the method and pure cotton fabric without loaded graphene;
FIG. 4 is a graph showing the influence of different washing times on the photothermal conversion capacity of the photothermal conversion heat-storage temperature-regulating cotton fabric prepared by the method;
FIG. 5 is an SEM picture of a cotton fabric with graphene oxide loaded on the surface;
fig. 6 is a photo-thermal conversion heat storage temperature regulation curve of cotton fabric loaded with different amounts of graphene (in the figure, control is a comparison sample, namely the cotton fabric not loaded with graphene, the graphene load amount of the cotton fabric is not directly given, only the graphene oxide load amount of the cotton fabric before reduction treatment is given, and the graphene load amount of products prepared in different embodiments can be compared according to the graphene oxide load amount).
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
A preparation method of a photothermal conversion heat storage and temperature regulation cotton fabric comprises the following steps:
1) cleaning the cotton fabric and then drying in the air; washing cotton fabric at 50 ℃ for 30min by using a water solution of a Libai washing powder as a washing solution, rinsing the cotton fabric by using water after washing, and then air-drying, wherein the ratio of the mass of the washing powder to the volume of the water in the Libai washing powder water solution is 1g:100 mL;
2) cleaning a cotton fabric, air-drying the cotton fabric, then pretreating the cotton fabric, and performing hydrophilic treatment, namely mixing 1 part of 35% ammonia water and 5 parts of deionized water according to the volume part, heating the mixture to 60 ℃, then adding 1 part of 30% hydrogen peroxide solution to obtain hydrophilic treatment liquid, soaking the cotton fabric in the hydrophilic treatment liquid for 10 minutes, taking out the cotton fabric, wherein the bath ratio is 1:50, and washing the cotton fabric with the deionized water; then carrying out cation modification treatment, namely immersing the cotton fabric into cation modification liquid consisting of a cation modifier and NaOH, carrying out ultrasonic treatment, taking out, washing with deionized water, and drying, wherein the process parameters are as follows: the concentration of NaOH in the cation modifying solution is 1.0g/L, the dosage of the cation modifying agent is 8owf percent, the temperature is 30 ℃, the bath ratio is 1:30, and the time is 5 minutes;
3) preparing a graphene oxide solution with the concentration of 2mg/mL, and magnetically stirring for 2 hours at room temperature to uniformly mix;
4) carrying out ultrasonic dispersion on a graphene oxide solution for 10min, uniformly spraying the graphene oxide solution on the surface of the cotton fabric prepared in the step 2) by using a nano spraying instrument, and drying, wherein an infrared lamp is adopted to dry the cotton fabric in the spraying process, the mass fraction of the graphene oxide loaded on the surface of the prepared cotton fabric is 4.5wt%, the SEM picture of the cotton fabric is shown in figure 5, as can be seen from the figure, the graphene oxide is a curled wrinkle structure, the loaded wrinkle graphene oxide does not change the plain weave structure of the cotton fabric, the basic morphology of the fiber is still kept, the graphene oxide is loaded on the surface of a single fiber, and gaps of warp yarns and weft yarns are not blocked, so that the influence on the air permeability of the fabric is small; according to the invention, the mass fraction of the graphene oxide loaded on the surface of the cotton fabric is obviously improved by adopting a spraying mode, if the mass fraction of the graphene oxide loaded on the surface of the cotton fabric is difficult to reach 4.5wt% by adopting a soaking mode, the loading capacity cannot be improved even if the concentration of the graphene oxide is improved, the dispersion performance is good because the graphene oxide is at the mass concentration of 1.0-3.0 mg/mL, when the mass concentration exceeds 5.0mg/mL, the liquid becomes very viscous, the solution is converted into a gel state, the cotton fabric with high loading capacity cannot be obtained by soaking, and the spraying can avoid the condition, so that the high-loading-capacity coating on the surface of the fabric can be conveniently and controllably realized;
5) carrying out thermal reduction treatment on the cotton fabric prepared in the step 4) at 200 ℃ for 10min to prepare the photo-thermal conversion heat storage and temperature regulation cotton fabric.
Under the irradiation of an infrared light source, the time for the temperature of the finally prepared photothermal conversion heat storage and temperature regulation cotton fabric to rise from 32.6 ℃ to 64.6 ℃ is 240s, and after the infrared light source is removed, the time for the temperature of the finally prepared photothermal conversion heat storage and temperature regulation cotton fabric to fall from 64.6 ℃ to 34.8 ℃ is 180 s.
And (3) carrying out photo-thermal conversion capability test on the finally prepared photo-thermal conversion heat storage and temperature regulation cotton fabric, which comprises the following specific steps:
testing one: irradiating the prepared photo-thermal conversion heat storage and temperature adjustment cotton fabric sample by using an infrared light source, and observing and recording the relationship between the irradiation time of the infrared light source and the surface temperature; after a certain time, removing the infrared light source when the surface temperature is not obviously changed along with time, and returning the surface temperature of the sample to the room temperature; the relationship between the irradiation time and the surface temperature is continuously observed and recorded, as shown in fig. 1, it can be seen from the graph that the surface temperature of the sample increases firstly with the increase of the irradiation time, and then sharply decreases after reaching the maximum value when the irradiation time exceeds 240s, and after the infrared irradiation is removed for 180s, the surface temperature becomes stable and approaches to the initial temperature, so that the photothermal conversion heat storage temperature regulating cotton fabric disclosed by the invention still maintains the initial photothermal conversion capability after being irradiated by infrared light for multiple times, and has good stability.
And (2) testing: the prepared photothermal conversion heat storage and temperature regulation cotton fabric is used as a sample, and the anti-fatigue capability of photothermal conversion is tested, and the method specifically comprises the following steps:
step 1: selecting a time point at which the surface temperature of the sample changes gently with time in the temperature rising and reducing process as a temperature rising and reducing end point;
step 2: the operation of irradiating the infrared light source and removing the infrared light source is repeated, the irradiation intensity of the infrared light source is kept the same each time and is the same as the infrared irradiation intensity in the embodiment 1, the relation between the surface temperature of the sample and the time is continuously observed and recorded, as shown in fig. 2, it can be seen from the figure that when the infrared light irradiation is repeatedly performed for a plurality of times, the photo-thermal conversion capability can be continuously kept, and the stability is good.
And (3) testing: the photo-thermal conversion capacity of the pure cotton fabric without graphene and the finally prepared photo-thermal conversion heat-storage temperature-regulating cotton fabric are tested by taking the pure cotton fabric without graphene as a sample, the testing method is the same as the first testing method and the second testing method, the testing result is shown in figure 3, and the figure shows that the surface temperature of the photo-thermal conversion heat-storage temperature-regulating cotton fabric is higher than that of the pure cotton fabric after infrared light irradiation, and the change speed is high, so that the photo-thermal conversion heat-storage temperature-regulating cotton fabric prepared by the invention has good photo-thermal conversion capacity.
And (4) testing: the prepared photothermal conversion heat storage and temperature regulation cotton fabric is used as a sample, and the photothermal conversion capacity after washing for different times is tested, and the specific steps are as follows:
step 1: dividing the prepared photothermal conversion heat storage and temperature regulation cotton fabric into five samples, and taking one of the five samples as a sample for washing for 0 time;
step 2: according to AATCC 61-2003 Standard for color fastness to washing of fabrics, the main steps are as follows: adding 225mg of AATCC1993WOB standard detergent washing powder WOB solid powder into 150mL of distilled water to prepare a WOB solution, adding the rest of samples, sealing a container by using aluminum foil paper, heating and washing in a water bath at 49 ℃ on a shaking table, taking out all the samples when washing for 25min, 50min, 75min and 100min, quickly rinsing for 3 times in the distilled water, adding the samples into the original WOB solution again to continue washing, taking out all the samples when washing for 125min, quickly rinsing for 3 times in the distilled water, naturally air-drying, and taking one sample as a sample for washing for 1 time;
and step 3: reconfiguring the same WOB solution as that in the step 2, adding the rest samples, and repeating the operation in the step 2 to obtain samples washed for 2 times, 3 times and 4 times in sequence;
and 4, step 4: the samples are respectively irradiated by the same infrared light source, the illumination intensity is kept to be the same during each irradiation, the relation between the surface temperature of each sample and the time is respectively observed and recorded, as shown in figure 4, it can be known from the figure that the photothermal conversion capacity of the photothermal conversion heat storage temperature regulating cotton fabric is not influenced by the washing times, the initial photothermal conversion capacity is still kept after multiple times of washing, and the stability is good.
Comparative example 1
The steps of the preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric are basically the same as those of the embodiment 1, and the difference is that the spraying is not a nanometer spraying instrument but an atomizer, an infrared lamp is not adopted in the spraying process for drying the cotton fabric, the time required for the temperature of the finally prepared photothermal conversion heat storage and temperature regulation cotton fabric to rise from 32.9 ℃ to 54.5 ℃ is 240s, and the time required for the temperature of the finally prepared photothermal conversion heat storage and temperature regulation cotton fabric to fall from 54.5 ℃ to 33.6 ℃ is 180s after an infrared light source is removed. Comparing example 1 with comparative example 1, it can be seen that the photothermal conversion heat storage and temperature regulation function of the product of example 1 is superior to that of comparative example 1, the main reason is that graphene oxide in a sheet layer in a solution is changed into a curled sheet layer structure after being sprayed out from an atomizer, and the graphene oxide in the sheet layer is changed into a curled wrinkle structure after being sprayed out from a nano spraying instrument under the irradiation of an infrared lamp, and the curled wrinkle structure has a larger specific surface area than the curled sheet layer structure, so that the photothermal conversion efficiency is higher, and the fabric can be endowed with a more excellent photothermal conversion heat storage and temperature regulation function.
Example 2
The preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric is basically the same as that of the embodiment 1, and is different in that in the step 4), the graphene oxide solution is uniformly sprayed on the surface of the cotton fabric, and then drying is repeated for different times, and the mass fraction of the prepared cotton fabric loaded with graphene oxide on the surface is 4.2 wt%.
Under the irradiation of an infrared light source, the time for the temperature of the finally prepared photothermal conversion heat storage and temperature regulation cotton fabric to rise from 33.5 ℃ to 67.6 ℃ is 240s, and after the infrared light source is removed, the time for the temperature of the finally prepared photothermal conversion heat storage and temperature regulation cotton fabric to fall from 67.6 ℃ to 35 ℃ is 130 s.
Example 3
The preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric is basically the same as that of the embodiment 1, and is different in that in the step 4), the graphene oxide solution is uniformly sprayed on the surface of the cotton fabric, and then drying is repeated for different times, wherein the mass fraction of the prepared cotton fabric loaded with graphene oxide on the surface is 3.1 wt%.
Under the irradiation of an infrared light source, the time for the temperature of the finally prepared photothermal conversion heat storage and temperature regulation cotton fabric to rise from 33.5 ℃ to 58.8 ℃ is 240s, and after the infrared light source is removed, the time for the temperature of the finally prepared photothermal conversion heat storage and temperature regulation cotton fabric to fall from 58.8 ℃ to 35 ℃ is 120 s.
Example 4
The preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric is basically the same as that of the embodiment 1, and is different in that in the step 4), the graphene oxide solution is uniformly sprayed on the surface of the cotton fabric, and then drying is repeated for different times, wherein the mass fraction of the prepared cotton fabric loaded with graphene oxide on the surface is 2.2 wt%.
Under the irradiation of an infrared light source, the time for heating the finally prepared photothermal conversion heat storage and temperature regulation cotton fabric from 33.5 ℃ to 55 ℃ is 180s, and after the infrared light source is removed, the time for reducing the temperature of the finally prepared photothermal conversion heat storage and temperature regulation cotton fabric from 65 ℃ to 35 ℃ is 110 s.
It can be seen by comparing examples 1 to 4 that the highest temperature is influenced by the content of graphene, the higher the mass fraction of graphene oxide loaded on the surface of the cotton fabric is, the higher the mass fraction of graphene loaded on the surface of the cotton fabric is, and the higher the highest temperature of the cotton fabric after photothermal conversion is, specifically as shown in fig. 6, the content in the figure is the mass fraction of graphene oxide loaded on the surface of the cotton fabric.
Claims (5)
1. A preparation method of a photothermal conversion heat storage and temperature regulation cotton fabric is characterized by comprising the following steps:
1) cleaning the cotton fabric and then drying in the air;
2) preparing a graphene oxide solution, and uniformly stirring at room temperature;
3) uniformly spraying a graphene oxide solution on the surface of the cotton fabric prepared in the step 1) by using a nano spraying instrument and drying;
4) carrying out reduction treatment on the cotton fabric prepared in the step 3) to prepare a photo-thermal conversion heat storage and temperature regulation cotton fabric;
the content of graphene oxide on the cotton fabric before reduction is 4.5 wt%;
under the irradiation of an infrared light source, the time required for the temperature of the photothermal conversion heat storage and temperature regulation cotton fabric to rise from 32.5 ℃ to 65 ℃ is 200-250 s, and after the infrared light source is removed, the time required for the temperature of the photothermal conversion heat storage and temperature regulation cotton fabric to fall from 65 ℃ to 35 ℃ is 250-280 s.
2. The preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric as claimed in claim 1, wherein the cotton fabric is rinsed with water before being air-dried after being cleaned.
3. The preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric according to claim 1, wherein the concentration of the graphene oxide solution is 2mg/mL, and the stirring is magnetic stirring for 2 hours.
4. The preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric according to claim 1, wherein the graphene oxide solution is subjected to ultrasonic dispersion treatment for 10min before spraying.
5. The preparation method of the photothermal conversion heat storage and temperature regulation cotton fabric according to claim 1, wherein the reduction is performed in a high-temperature heat treatment mode, the temperature of the reduction is 200 ℃, and the time is 10 min.
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| CN109183394A (en) * | 2018-08-30 | 2019-01-11 | 东华大学 | A kind of preparation method of photothermal conversion heat-accumulation temperature-adjustment cotton fabric |
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| CN110453494A (en) * | 2019-08-29 | 2019-11-15 | 南通强生石墨烯科技有限公司 | A kind of Graphene antibiosis fabric and preparation method thereof |
| CN110924194A (en) * | 2019-11-14 | 2020-03-27 | 南通大学 | Preparation method of efficient photo-thermal steam conversion material |
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| CN109183394A (en) | 2019-01-11 |
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