CN110965318A - Janus structure conductive humidity-sensing textile with humidity responsiveness - Google Patents
Janus structure conductive humidity-sensing textile with humidity responsiveness Download PDFInfo
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Abstract
The invention discloses a Janus structure conductive moisture-sensing textile with humidity responsiveness. The conductive moisture-sensing textile is prepared by the following steps: (1) uniformly mixing polyvinyl silicone oil, tetra (3-mercaptopropionic acid) pentaerythritol ester benzoin dimethyl ether and a solvent to prepare a hydrophobic layer solution, immersing the pretreated textile into the hydrophobic layer solution, taking out the textile, pressing, irradiating the textile on one side with ultraviolet for 1-100 s, and cleaning the textile to prepare the hydrophobic textile; (2) and dissolving the hydrophilic high polymer material and the conductive material in water to prepare an aqueous dispersion, treating the hydrophobic textile by the aqueous dispersion, and drying the treated hydrophobic textile to obtain the conductive humidity-sensitive textile. The conductive material and the temperature and humidity responsive polymer material are loaded on the surface of the textile through a specific route design, so that the textile is endowed with functionality and has potential application in the field of intelligent textiles.
Description
The technical field is as follows:
the invention belongs to the technical field of high polymer materials and functional textiles, and particularly relates to a Janus structure conductive humidity-sensitive textile with humidity responsiveness.
Background art:
with the improvement of living standard and the increasing dependence of electronic information products, textiles with conductive function become infrastructure of wearable equipment. The textile is not a pure warm-keeping and beautiful function any more, but is a carrier of intelligent equipment. Common conductive textiles simply have a conductive function and do not have responsibilities of temperature, humidity and the like.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provide a Janus structure conductive humidity-sensing textile with humidity responsiveness.
The invention aims to provide a Janus structure conductive moisture-sensing textile with humidity responsiveness, which is prepared by the following steps:
(1) preparing a single-side hydrophobic textile: uniformly mixing polyvinyl silicone oil, pentaerythritol tetrakis (3-mercaptopropionate), benzoin dimethyl ether and a solvent to prepare a hydrophobic layer solution with the mass fraction of 0.5-2%, wherein the molar ratio of vinyl to mercapto of pentaerythritol tetrakis (3-mercaptopropionate) in the polyvinyl silicone oil is 0.8-1.2, the addition amount of the benzoin dimethyl ether is 0.005-0.02 mol of benzoin dimethyl ether per 1mol of mercapto, immersing the pretreated textile into the hydrophobic layer solution for 10-60 s, taking out the textile, pressing to control the retention rate of the textile to be 80-170%, irradiating the textile for 10-100 s on one side by ultraviolet light, and cleaning the textile to prepare the single-side hydrophobic textile;
(2) preparing a conductive humidity-sensitive textile: dispersing 1-20 parts by mass of hydrophilic high polymer material and 0.1-5 parts by mass of conductive material in water, uniformly mixing to prepare 1-5% by mass of aqueous dispersion, treating the single-side hydrophobic textile prepared in the step (1) by using an immersion or coating method through the aqueous dispersion, and drying the treated single-side hydrophobic textile to obtain the conductive humidity-sensitive textile. The solvent is selected from one of ethyl acetate, toluene, butyl acetate and tetrahydrofuran.
The method comprises the following steps of (1) treating the hydrophobic textile prepared in the step (1) by using an immersion method through the aqueous dispersion, and drying the treated hydrophobic textile to obtain the conductive humidity-sensitive textile: and (2) immersing the hydrophobic textile prepared in the step (1) into the water dispersion, wherein only the unmodified side can be immersed into the water dispersion due to the hydrophobicity of the hydrophobic layer on the hydrophobic textile, taking out the textile, cleaning a small amount of liquid adhered to the hydrophobic layer by using water, and drying the textile in an oven at 120-170 ℃ for 3-120 min to obtain the hydrophobic textile.
The hydrophobic layer textile prepared in the step (1) is treated by the aqueous dispersion through a coating method, and the specific steps of drying the treated hydrophobic textile to prepare the conductive humidity-sensitive textile are as follows: coating the aqueous dispersion on the hydrophilic side of the textile according to a certain pattern, wherein only the unmodified side can absorb the aqueous dispersion to obtain a modification effect due to the hydrophobicity of the hydrophobic layer on the hydrophobic textile, and drying the textile in an oven at 120-170 ℃ for 3-120 min to obtain the textile with proper responsiveness of a specific pattern or line.
Preferably, the step of pretreating the pretreated textile is: and (3) putting the textile into water for cleaning to remove dust and oil stains on the textile, and then drying to obtain the pretreated textile.
Preferably, the wavelength of the ultraviolet light is 365 nm.
Preferably, the hydrophilic polymer material is prepared by the following steps: uniformly mixing 90-95 parts by mass of acrylic monomer and 5-10 parts by mass of gamma-methacryloxypropyltrimethoxysilane in a solvent, adding 1-5 parts by mass of an initiator, and carrying out polymerization reaction at 50-80 ℃ for 2-20 hours to obtain the hydrophilic polymer material.
Preferably, the acrylic monomer is selected from one of dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl acrylate, diethylaminoethyl methacrylate, methacrylic acid and methacryloyloxyethyl trimethyl ammonium chloride.
Preferably, the conductive material is selected from one of single-walled carbon nanotubes, multi-walled carbon nanotubes, graphene, expanded graphene, conductive graphite and nano silver wires.
Preferably, the solvent is selected from one of methanol, ethanol, dichloromethane, tetrahydrofuran and ethyl acetate.
Preferably, the initiator is azobisisobutyronitrile or azobisisoheptonitrile.
Preferably, the textile is a non-woven fabric or a knitted fabric.
Preferably, the drying of the treated hydrophobic layer textile comprises the following specific steps: and (4) drying the treated hydrophobic layer textile in an oven at 120-170 ℃ for 3-120 min.
The invention has the beneficial effects that:
(1) according to the invention, through the hydrophobic-hydrophilic Janus structure, moisture generated on the body surface is guided out and enriched to the surface of the textile, so that breathable, dry and comfortable wearing experience is obtained;
(2) the gamma-methacryloxypropyltrimethoxysilane is introduced into the hydrophilic polymer, so that the polymer can be crosslinked during curing, and meanwhile, the conductive material is cured to endow the textile with conductive property.
Description of the drawings:
FIG. 1 is a graph showing the change in humidity of the conductive moisture-sensitive nonwoven fabric prepared in example 1;
fig. 2 is a graph showing the change of the conductivity with humidity of the conductive moisture-sensitive nonwoven fabric prepared in example 1.
The specific implementation mode is as follows:
the following examples are further illustrative of the present invention and are not intended to be limiting thereof.
The present invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. In practice, the technical personnel according to the invention make improvements and modifications, which still belong to the protection scope of the invention.
The equipment and reagents used in the invention are conventional commercial products in the technical field.
Example 1:
a Janus structure conductive moisture-sensing textile with humidity responsiveness is prepared by the following steps:
(1) preparing a single-side hydrophobic non-woven fabric: : mixing polyvinyl silicone oil (10% vinyl content, viscosity 500CS) and pentaerythritol tetra (3-mercaptopropionate) according to nVinyl radical/nMercapto groupAdding benzoin dimethyl ether with the amount of 1 mol% of sulfydryl according to the proportion of 1, dissolving and mixing evenly by using ethyl acetatePreparing 1% hydrophobic layer solution, soaking the non-woven fabric to be treated in the hydrophobic layer solution for 10s, taking out, rolling with a rolling mill, controlling the rolling residual rate at 100%, then placing in an ultraviolet box, irradiating at one side (365nm), taking out after 10s, and cleaning with ethyl acetate to obtain the single-side hydrophobic non-woven fabric.
(2) Preparing the non-woven fabric with the functions of conducting electricity, conducting moisture and sensing moisture: 1g of hydrophilic polymer (calculated according to solid content) and 5g of multi-walled carbon nanotubes are dispersed in water to prepare 1% aqueous dispersion, and the aqueous dispersion is dispersed by using ultrasonic to obtain stable dispersion. And (2) floating the hydrophilic side of the single-side hydrophobic non-woven fabric prepared in the step (1) in the soaking water dispersion liquid, only the unmodified side can soak the water dispersion liquid due to the hydrophobicity of the hydrophobic layer of the hydrophobic non-woven fabric, taking out the non-woven fabric, and drying the non-woven fabric in an oven at 170 ℃ for 3min to obtain the conductive wet sensing non-woven fabric. The humidity response is shown in figure 1, and it can be seen from figure 1 that the lyophobic side substantially maintains the water content when the test is started, while the lyophilic side rapidly increases in water content, becoming saturated after 25 s.
Figure 2 shows that as the water content increases, the gel system swells, resulting in less contact of the conductive material doped therebetween, and thus an increase in resistance.
The hydrophilic polymer material is prepared by the following steps: 95g of dimethylaminoethyl methacrylate, 5g of gamma-methacryloxypropyltrimethoxysilane and 2g of azobisisobutyronitrile are dissolved in 500g of absolute ethyl alcohol and reacted for 10 hours at 65 ℃ to obtain the hydrophilic polymer material.
And (3) humidity detection: sample size 90mm2Saline was prepared according to AATCC-15, 16.6g of saline was dropped on the hydrophobic side of the textile within 20s, and the humidity was measured using a moisture meter.
Comparative example 1
The same as example 1, except that: and (3) adding 6g of hydrophilic polymer (calculated according to solid content) into the step (2) to prepare an aqueous dispersion with the mass fraction of 1%. The results showed no conductivity, and humidity could not be measured.
Comparative example 2
The same as example 1, except that: and (2) adding 6g of multi-walled carbon nano-tubes to prepare an aqueous dispersion with the mass fraction of 1%. The film formation was impossible.
Example 2
A Janus structure conductive moisture-sensing textile with humidity responsiveness is prepared by the following steps:
(1) preparing a single-side hydrophobic non-woven fabric: mixing polyvinyl silicone oil (10% vinyl content, 500CS) and pentaerythritol tetra (3-mercaptopropionate) according to nVinyl radical/nMercapto groupAdding materials according to a proportion of 1, adding benzoin dimethyl ether with the amount of 1 mol% of sulfydryl, dissolving and mixing uniformly by using ethyl acetate to prepare a hydrophobic layer solution with the mass fraction of 0.5%, immersing the non-woven fabric to be treated in the hydrophobic layer solution for 20s, taking out, rolling by using a rolling mill, controlling the rolling residual rate to be 80%, then putting the non-woven fabric into an ultraviolet box, irradiating at one side (365nm), taking out after 30s, and cleaning by using ethyl acetate to prepare the single-side hydrophobic non-woven fabric.
(2) Preparing conductive wet non-woven fabric: dispersing 1g of hydrophilic high polymer material (calculated according to solid content) and 0.1g of nano silver wires in water, preparing aqueous dispersion with the mass fraction of 3%, dispersing by using ultrasonic to obtain stable dispersion, coating the aqueous dispersion on the hydrophilic side of a hydrophobic non-woven fabric according to a specific pattern, only the unmodified side can absorb the dispersion to obtain a modification effect due to the hydrophobicity of a hydrophobic layer, and drying in an oven at 120 ℃ for 120min to obtain the humidity-responsive conductive electrowetting non-woven fabric with the specific pattern or circuit.
The hydrophilic polymer material is prepared by the following steps: 95g of dimethylaminoethyl acrylate, 5g of gamma-methacryloxypropyltrimethoxysilane and 5g of azobisisobutyronitrile are dissolved in 500g of tetrahydrofuran and reacted for 20 hours at 50 ℃ to obtain the hydrophilic polymer material.
Example 3
A Janus structure conductive moisture-sensing textile with humidity responsiveness is prepared by the following steps:
(1) preparing a single-side hydrophobic non-woven fabric: mixing polyvinyl silicone oil (10% vinyl content, 500CS) and pentaerythritol tetra (3-mercaptopropionate) according to nVinyl radical/nMercapto groupAdding 1 mol% benzoin dimethyl ether of sulfydryl, dissolving in tetrahydrofuran and mixingPreparing a solution with the mass fraction of 1.5%, immersing the non-woven fabric to be treated in the hydrophobic layer solution for 10s, taking out, pressing and binding by using a rolling mill, controlling the rolling residual rate to be 100%, then placing the non-woven fabric into an ultraviolet box, irradiating on one side (365nm), taking out after 15s, and cleaning by using ethyl acetate to obtain the single-side hydrophobic non-woven fabric.
(2) Preparing conductive wet non-woven fabric: dispersing 1g of hydrophilic high polymer material (calculated according to solid content) and 1g of graphene in water, preparing aqueous dispersion with the mass fraction of 5%, and dispersing by using ultrasonic to obtain stable dispersion. And (2) immersing the hydrophobic non-woven fabric prepared in the step (1) into the water dispersion, only the unmodified side can infiltrate the water dispersion due to the hydrophobicity of the hydrophobic layer, taking out the hydrophobic layer, cleaning a small amount of liquid adhered to the hydrophobic layer, and drying the hydrophobic layer in an oven at 170 ℃ for 3min to obtain the conductive wet non-woven fabric.
The hydrophilic polymer material is prepared by the following steps: 90g of diethylamine ethyl acrylate, 10g of gamma-methacryloxypropyltrimethoxysilane and 5g of azobisisoheptonitrile are dissolved in 500g of ethanol and reacted at 65 ℃ for 10 hours to obtain the hydrophilic polymer material.
Example 4
A Janus structure conductive moisture-sensing textile with humidity responsiveness is prepared by the following steps:
(1) preparing a single-side hydrophobic non-woven fabric: mixing polyvinyl silicone oil (10% vinyl content, 500CS) and pentaerythritol tetra (3-mercaptopropionate) according to nVinyl radical/nMercapto groupAdding materials according to a proportion of 1, adding benzoin dimethyl ether with the amount of 1 mol% of sulfydryl, dissolving and mixing uniformly by using butyl acetate to prepare a solution with the mass fraction of 1%, immersing the non-woven fabric cloth to be treated in the hydrophobic layer solution for 60s, taking out, pressing by using a rolling mill, controlling the rolling residual rate at 170%, then putting the non-woven fabric cloth into an ultraviolet box, irradiating at one side (365nm), taking out after 100s, and cleaning by using ethyl acetate to prepare the single-side hydrophobic non-woven fabric.
(2) Preparing conductive wet non-woven fabric: 1g of hydrophilic polymer (calculated according to solid content) and 0.1g of nano-silver wire are dispersed in water to prepare aqueous dispersion with the mass fraction of 5%, and the aqueous dispersion is dispersed by using ultrasonic to obtain stable dispersion. And (2) coating the dispersion liquid on the hydrophilic side of the hydrophobic non-woven fabric in the step (1) according to a specific pattern, and placing the non-modified side into an oven to be dried for 120min at 120 ℃ to obtain the humidity-responsive moisture-conducting textile with the specific pattern or line, wherein only the non-modified side can absorb the dispersion liquid to obtain a modification effect due to the hydrophobicity of the hydrophobic layer.
The hydrophilic polymer material is prepared by the following steps: dissolving 95g of methacrylic acid, 5g of gamma-methacryloxypropyltrimethoxysilane and 5g of azobisisobutyronitrile in 500g of tetrahydrofuran, and reacting at 50 ℃ for 20 hours to obtain the hydrophilic polymer material.
Example 5
A Janus structure conductive moisture-sensing textile with humidity responsiveness is prepared by the following steps:
(1) preparing a single-side hydrophobic non-woven fabric: mixing polyvinyl silicone oil (vinyl content 10%, 500CS) and tetra (3-mercaptopropionic acid) pentaerythritol ester according to nVinyl radical/nMercapto groupAdding 0.8 of the raw materials according to a proportion, adding benzoin dimethyl ether with 0.5 mol% of sulfydryl, dissolving and mixing uniformly by using ethyl acetate to prepare a hydrophobic layer solution with the mass fraction of 0.5%, immersing the non-woven fabric to be treated in the hydrophobic layer solution for 10s, taking out, rolling by using a rolling mill, controlling the rolling residual rate to be 100%, then putting the non-woven fabric into an ultraviolet box, irradiating at one side (365nm), taking out after 15s, and cleaning by using ethyl acetate to prepare the single-side hydrophobic non-woven fabric.
(2) Preparing conductive wet non-woven fabric: dispersing 1g of hydrophilic high polymer material (calculated according to solid content) and 5g of conductive graphene in water to prepare a water dispersion with the mass fraction of 5%, and dispersing by using ultrasonic to obtain a stable dispersion. And (2) immersing the hydrophobic non-woven fabric prepared in the step (1) into the water dispersion, wherein only the unmodified side can infiltrate the water dispersion due to the hydrophobicity of the hydrophobic layer, taking out the hydrophobic layer, washing a small amount of liquid adhered to the hydrophobic layer by using water, and drying the hydrophobic layer in an oven at 170 ℃ for 3min to obtain the hydrophobic non-woven fabric.
The hydrophilic polymer material is prepared by the following steps: 90g of methacryloyloxyethyl trimethyl ammonium chloride, 10g of gamma-methacryloyloxypropyl trimethoxy silane and 5g of azobisisobutyronitrile are dissolved in 1000g of ethanol and reacted at 80 ℃ for 2 hours to obtain the hydrophilic polymer material.
Example 6
A Janus structure conductive moisture-sensing textile with humidity responsiveness is prepared by the following steps:
(1) preparing a single-side hydrophobic non-woven fabric: mixing polyvinyl silicone oil (vinyl content 10%, 500CS) and tetra (3-mercaptopropionic acid) pentaerythritol ester according to nVinyl radical/nMercapto groupAdding materials according to a proportion of 1.2, adding benzoin dimethyl ether with 2 mol% of sulfydryl, dissolving with ethyl acetate to prepare a hydrophobic layer solution with the mass fraction of 2%, uniformly mixing, immersing the non-woven fabric to be treated in the hydrophobic layer solution for 10s, taking out, rolling with a rolling mill, controlling the rolling residual rate at 100%, then placing the non-woven fabric into an ultraviolet box to irradiate on one side (365nm), taking out after 15s, and cleaning with ethyl acetate to obtain the single-side hydrophobic non-woven fabric.
(2) Preparing conductive wet non-woven fabric: dispersing 20g of hydrophilic high polymer material (the pH value is adjusted to be 8 according to solid content) and 5g of conductive graphene in water, preparing a water dispersion liquid with the mass fraction of 3%, dispersing by using ultrasonic to obtain a stable dispersion liquid, immersing the hydrophobic non-woven fabric prepared in the step (1) in the water dispersion liquid, soaking only an unmodified side in the water dispersion liquid due to the hydrophobicity of the hydrophobic layer, taking out, washing a small amount of liquid adhered to the hydrophobic layer by using water, and drying in an oven at 170 ℃ for 3min to obtain the conductive wet non-woven fabric.
The hydrophilic polymer material is prepared by the following steps: 90g of methacrylic acid, 10g of gamma-methacryloxypropyltrimethoxysilane and 1g of azobisisobutyronitrile are dissolved in 500g of ethanol and reacted for 16 hours at 65 ℃ to obtain the hydrophilic polymer material.
While the above embodiments of the moisture responsive conductive Janus-structured moisture-sensing textile of the present invention have been described in detail to facilitate the understanding of the technical solutions and the core ideas of the present invention, it should be noted that, for those skilled in the art, various modifications and alterations can be made to the present invention without departing from the principle of the present invention, and these modifications and alterations also fall into the protection scope of the claims of the present invention.
Claims (10)
1. A Janus structure conductive moisture-sensing textile with humidity responsiveness is characterized by being prepared by the following steps:
(1) preparing a single-side hydrophobic textile: uniformly mixing polyvinyl silicone oil, pentaerythritol tetrakis (3-mercaptopropionate), benzoin dimethyl ether and a solvent to prepare a hydrophobic layer solution with the mass fraction of 0.5-2%, wherein the molar ratio of vinyl to mercapto of pentaerythritol tetrakis (3-mercaptopropionate) in the polyvinyl silicone oil is 0.8-1.2, the addition amount of the benzoin dimethyl ether is 0.005-0.02 mol of benzoin dimethyl ether per 1mol of mercapto, immersing the pretreated textile into the hydrophobic layer solution for 10-60 s, taking out the textile, pressing to control the retention rate of the textile to be 80-170%, irradiating the textile for 10-100 s on one side by ultraviolet light, and cleaning the textile to prepare the single-side hydrophobic textile;
(2) preparing a conductive humidity-sensitive textile: dispersing 1-20 parts by mass of hydrophilic high polymer material and 0.1-5 parts by mass of conductive material in water, uniformly mixing to prepare 1-5% by mass of aqueous dispersion, treating the single-side hydrophobic textile prepared in the step (1) by using an immersion or coating method through the aqueous dispersion, and drying the treated single-side hydrophobic textile to obtain the conductive humidity-sensitive textile.
2. The moisture responsive Janus structural moisture wicking textile of claim 1, wherein the step of pretreating the pretreated textile comprises: and (3) putting the textile into water for cleaning to remove dust and oil stains on the textile, and then drying to obtain the pretreated textile.
3. The moisture responsive Janus structural moisture wicking textile of claim 1, wherein the uv light wavelength is 365 nm.
4. The moisture-responsive conductive Janus-structured moisture-sensing textile as claimed in claim 1, wherein the hydrophilic polymer material is prepared by the following steps: uniformly mixing 90-95 parts by mass of acrylic monomer and 5-10 parts by mass of gamma-methacryloxypropyltrimethoxysilane in a solvent, adding 1-5 parts by mass of an initiator, and carrying out polymerization reaction at 50-80 ℃ for 2-20 hours to obtain the hydrophilic polymer material.
5. The moisture responsive Janus structured conductive moisture sensing textile of claim 4, wherein the acrylic monomer is selected from one of dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl acrylate, diethylaminoethyl methacrylate, methacrylic acid, and methacryloyloxyethyl trimethyl ammonium chloride.
6. The humidity-responsive Janus-structured conductive moisture-sensing textile as claimed in claim 4, wherein the conductive material is selected from one of single-walled carbon nanotubes, multi-walled carbon nanotubes, graphene, expanded graphene, conductive graphite and nano silver wires.
7. The moisture-responsive Janus structure conductive moisture-sensing textile as claimed in claim 4, wherein the solvent is selected from one of methanol, ethanol, dichloromethane, tetrahydrofuran and ethyl acetate.
8. The moisture-responsive Janus-structured conductive moisture-sensing textile as claimed in claim 4, wherein the initiator is azobisisobutyronitrile or azobisisoheptonitrile.
9. The moisture-responsive Janus structure conductive moisture-sensing textile as claimed in claim 1, wherein the textile is a non-woven fabric or a knitted fabric.
10. The moisture-responsive Janus structure conductive moisture-sensing textile as claimed in claim 1, wherein the step of drying the treated hydrophobic textile comprises the following steps: and (3) drying the treated hydrophobic textile in an oven at 120-170 ℃ for 3-120 min.
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| CN201911176778.7A CN110965318B (en) | 2019-11-26 | 2019-11-26 | Janus structure moisture-conducting and moisture-sensing textile with humidity responsiveness |
| PCT/CN2019/125137 WO2021103181A1 (en) | 2019-11-26 | 2019-12-13 | Electrically-conductive humidity-sensitive textile having a janus structure and humidity responsiveness |
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| CN201911176778.7A CN110965318B (en) | 2019-11-26 | 2019-11-26 | Janus structure moisture-conducting and moisture-sensing textile with humidity responsiveness |
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