CN115467174B - Conductive PU synthetic leather and preparation method thereof - Google Patents
Conductive PU synthetic leather and preparation method thereof Download PDFInfo
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- CN115467174B CN115467174B CN202210956449.XA CN202210956449A CN115467174B CN 115467174 B CN115467174 B CN 115467174B CN 202210956449 A CN202210956449 A CN 202210956449A CN 115467174 B CN115467174 B CN 115467174B
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- 239000002649 leather substitute Substances 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims abstract description 60
- 239000010410 layer Substances 0.000 claims abstract description 102
- 239000004814 polyurethane Substances 0.000 claims abstract description 43
- 239000004744 fabric Substances 0.000 claims abstract description 34
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002131 composite material Substances 0.000 claims abstract description 23
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002344 surface layer Substances 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 17
- 239000002904 solvent Substances 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 229920002635 polyurethane Polymers 0.000 claims abstract description 13
- 239000006185 dispersion Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000012756 surface treatment agent Substances 0.000 claims abstract description 5
- 239000002609 medium Substances 0.000 claims description 63
- 239000011259 mixed solution Substances 0.000 claims description 61
- 239000011248 coating agent Substances 0.000 claims description 23
- 238000000576 coating method Methods 0.000 claims description 23
- 238000001035 drying Methods 0.000 claims description 21
- 238000004381 surface treatment Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 9
- 239000006229 carbon black Substances 0.000 claims description 9
- 239000013530 defoamer Substances 0.000 claims description 9
- 229910021392 nanocarbon Inorganic materials 0.000 claims description 9
- 229920000570 polyether Polymers 0.000 claims description 9
- 239000003431 cross linking reagent Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- YGCOKJWKWLYHTG-UHFFFAOYSA-N [[4,6-bis[bis(hydroxymethyl)amino]-1,3,5-triazin-2-yl]-(hydroxymethyl)amino]methanol Chemical group OCN(CO)C1=NC(N(CO)CO)=NC(N(CO)CO)=N1 YGCOKJWKWLYHTG-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- -1 ester quaternary ammonium salt Chemical class 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000002335 surface treatment layer Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 239000010985 leather Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000000051 modifying effect Effects 0.000 description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical group CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000000554 physical therapy Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0059—Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/04—Properties of the materials having electrical or magnetic properties
- D06N2209/041—Conductive
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The application relates to the technical field of PU synthetic leather processing, and particularly discloses conductive PU synthetic leather and a preparation method thereof. The conductive PU synthetic leather comprises a base cloth layer, wherein a conductive layer is arranged on the base cloth layer, a composite layer is arranged on the side wall, deviating from the conductive layer, of the base cloth layer, and a surface layer is arranged on the side wall, deviating from the base cloth layer, of the conductive layer; the raw materials of the surface layer comprise the following components in parts by weight: 5-15 parts of graphene dispersion liquid and 10-20 parts of surface treatment agent; the conductive layer comprises the following raw materials in parts by weight: 100-140 parts of solvent, 80-120 parts of polyurethane and 4-8 parts of modified conductive medium; the modified conductive medium comprises the following raw materials: conductive medium, ethanol and gamma- (2, 3-glycidoxy) propyl trimethoxy silane.
Description
Technical Field
The application relates to the technical field of PU synthetic leather processing, in particular to conductive PU synthetic leather and a preparation method thereof.
Background
With the development of economy, mass demand has been satisfied, pursuit of quality of life is higher and higher, and with the further development of this trend, the brand new mode of health monitoring is widely applied to living aspects, and more young people pay attention to health maintenance. The conductive massage armchair realizes the electric physiotherapy and monitoring functions through the interaction of the bioelectricity of the human body and the conductive surface layer, and the conductive PU leather has the handfeel of leather and certain conductive performance, so that the conductive PU leather is generally applied to the conductive massage armchair, but when the common conductive PU leather is prepared, the conductive PU leather can cause the prepared PU leather to have no conductive performance after the surface treatment.
Disclosure of Invention
After the PU leather is subjected to surface treatment, the application provides the conductive PU synthetic leather and a preparation method thereof in order to enable the PU leather to have conductivity.
In a first aspect, the application provides a conductive PU synthetic leather, which adopts the following technical scheme:
the conductive PU synthetic leather comprises a base cloth layer, wherein a conductive layer is arranged on the base cloth layer, a composite layer is arranged on the side wall, deviating from the conductive layer, of the base cloth layer, and a surface layer is arranged on the side wall, deviating from the base cloth layer, of the conductive layer; the raw materials of the surface layer comprise the following components in parts by weight: 5-15 parts of graphene dispersion liquid and 10-20 parts of surface treating agent; the conductive layer comprises the following raw materials in parts by weight: 100-140 parts of solvent, 80-120 parts of polyurethane and 4-8 parts of modified conductive medium; the modified conductive medium comprises the following raw materials: conductive medium, ethanol and gamma- (2, 3-glycidoxy) propyl trimethoxy silane.
By adopting the technical scheme, ethanol is used as a solvent, gamma- (2, 3-glycidoxy) propyl trimethoxy silane is used for modifying the conductive medium, so that hydrophilic groups are formed on the conductive medium, the conductive medium is uniformly distributed in the conductive layer, and graphene in the surface layer and the conductive medium form a conductive structure, so that the PU leather after surface treatment still has conductive performance.
In a specific embodiment, the method for preparing the modified conductive medium comprises the steps of: uniformly mixing a conductive medium, ethanol and water to obtain a mixed solution A; adding gamma- (2, 3-glycidoxy) propyl trimethoxy silane into ethanol to obtain a mixed solution B; and (3) adding the mixed solution B into the mixed solution A under the heating condition, and reacting for 10-20min to obtain a modified mixed solution, and performing centrifugal drying, washing and drying to obtain the modified conductive medium.
By adopting the technical scheme, firstly dispersing a conductive medium in ethanol to prepare a mixed solution A; then adding gamma- (2, 3-glycidoxy) propyl trimethoxy silane into ethanol to prepare a mixed solution B, then adding the mixed solution B into the mixed solution A under the heating condition, reacting the mixed solution B with the mixed solution A, centrifugally drying, washing, and drying to obtain a modified conductive medium, and finishing the modification of the conductive medium.
In a specific embodiment, the weight percentage of the conductive medium in the mixed solution A is 2% -8%.
By adopting the technical scheme, the application further limits the weight percentage of the conductive medium in the mixed solution A, so that the conductive medium is fully dispersed in the mixed solution A, and the modification effect of the conductive medium is improved.
In a specific embodiment, the weight percentage of gamma- (2, 3-glycidoxy) propyl trimethoxysilane in the mixed solution B is 5-15%.
In a specific embodiment, the volume ratio of the mixed liquor B to the mixed liquor a is 1: (2-4).
By adopting the technical scheme, the application further limits the weight percentage of the gamma- (2, 3-glycidoxy) propyl trimethoxy silane in the mixed solution B and the volume ratio of the mixed solution B to the mixed solution A, so that the gamma- (2, 3-glycidoxy) propyl trimethoxy silane fully reacts with the conductive medium, thereby improving the modification effect of the silicon dioxide.
In a specific embodiment, the conductive medium comprises one or more of nano carbon black, nickel powder, graphene.
By adopting the technical scheme, the nano carbon black, the nickel powder and the graphene all have certain conductive performance, wherein the specific surface area of the nano carbon black is large, and the formation of a conductive structure is facilitated, so that the conductive performance of the prepared synthetic leather is improved.
In a specific embodiment, the raw materials of the surface layer further comprise 0.01 to 0.1 parts by weight of a polyether defoamer and 1 to 2 parts by weight of a crosslinking agent, wherein the crosslinking agent comprises hexamethylol melamine.
By adopting the technical scheme, the synthetic leather has higher appearance effect and better hand feeling by utilizing the cooperation of the polyether defoamer and the hexamethylol melamine.
In a specific embodiment, the raw materials of the conductive layer further comprise 0.05 to 0.15 weight parts of softener and 20 to 30 weight parts of color paste, wherein the softener comprises ester quaternary ammonium salt.
By adopting the technical scheme, the ester quaternary ammonium salt reduces the friction force among fibers in the base cloth layer, so that the synthetic leather is softer, and the hand feeling of the synthetic leather is further improved.
In a specific embodiment, the raw materials of the composite layer include the following components in parts by weight: 80-120 parts of polyurethane, 60-80 parts of solvent and 10-20 parts of color paste.
In a second aspect, the application provides a preparation method of conductive PU synthetic leather, which adopts the following technical scheme: the preparation method of the conductive PU synthetic leather comprises the following steps:
preparing a conductive layer: adding polyurethane, a modified conductive medium, a softener and color paste into a solvent, uniformly stirring to obtain a conductive coating, coating the conductive coating on a base cloth layer, and drying to form a conductive layer;
Preparing a surface layer: adding a surface treatment agent, a polyether defoamer and a cross-linking agent into the graphene dispersion liquid, uniformly stirring to obtain a surface treatment material, coating the surface treatment material on a conductive layer, and drying to obtain a surface treatment layer;
Preparing a composite layer: and adding polyurethane and color paste into the solvent, uniformly mixing to obtain a composite material, coating the composite material on the side wall of the base cloth layer, which is away from the conductive layer, and drying to obtain the composite layer, thereby obtaining the conductive PU synthetic leather.
Through adopting above-mentioned technical scheme, firstly coat conductive paint on the base cloth layer, form the conducting layer, then coat the surface department material on the conducting layer, form the surface department layer, finally coat the composite material on the lateral wall that the base cloth layer deviates from the conducting layer, obtain the composite layer, prepare the synthetic leather that the electric conductivity is better.
In summary, the present application includes at least one of the following beneficial technical effects:
1. According to the application, ethanol is used as a solvent, gamma- (2, 3-glycidoxy) propyl trimethoxy silane is used for modifying a conductive medium, so that hydrophilic groups are formed on the conductive medium, the conductive medium is uniformly distributed in a conductive layer, and graphene in a surface layer and the conductive medium form a conductive structure, so that the PU leather subjected to surface treatment still has conductive performance;
2. According to the application, the polyether defoamer and the hexamethylol melamine are matched, so that the synthetic leather has a higher appearance effect and a better hand feeling;
3. according to the application, the conductive coating is coated on the base cloth layer to form the conductive layer, the surface material is coated on the conductive layer to form the surface layer, and finally the composite material is coated on the side wall of the base cloth layer, which is away from the conductive layer, to obtain the composite layer, so that the synthetic leather with good conductive performance is prepared.
Drawings
Fig. 1 is a schematic structural view for embodying synthetic leather in an embodiment of the present application.
Reference numerals illustrate: 1. a base cloth layer; 2. a conductive layer; 3. a surface layer; 4. and (3) a composite layer.
Detailed Description
The present application will be described in further detail with reference to examples.
All the starting materials in the examples are commercially available. Wherein the esterquat CAS number: 91995-81-2; polyether defoamer is provided by Wuhan mountain technology Co., ltd; graphene dispersion is provided by wuhanpeng barrier biotechnology limited; the organosilicon surfactant is provided by Guangzhou chemical industry Co., ltd, and has the product number of OFX-0309.
Preparation example
Preparation example 1
Stirring and mixing the conductive medium, ethanol and water uniformly to obtain a mixed solution A; adding gamma- (2, 3-glycidoxy) propyl trimethoxy silane into ethanol, and stirring and mixing uniformly to obtain a mixed solution B; dripping the mixed solution B into the mixed solution A at 66 ℃ for 20min to obtain a modified mixed solution, centrifugally drying, washing, and then vacuum drying at 180 ℃ for 20h to obtain a modified conductive medium; wherein the conductive medium in the mixed solution A is nano carbon black, the weight percentage of the conductive medium is 2%, the weight percentage of ethanol is 60%, and the weight percentage of gamma- (2, 3-glycidoxy) propyl trimethoxy silane in the mixed solution B is 5%; and the volume ratio of the mixed solution B to the mixed solution A is 1:2.
Preparation example 2
Preparation example 2 differs from preparation example 1 in that the weight percentage of the conductive medium in the mixed solution a is 5%, and the rest of the steps are identical to preparation example 1.
Preparation example 3
Preparation example 3 differs from preparation example 1 in that the weight percentage of the conductive medium in the mixed solution A is 8%, and the rest of the steps are identical to preparation example 1.
Preparation example 4
Preparation example 4 differs from preparation example 2 in that the weight percentage of gamma- (2, 3-glycidoxy) propyltrimethoxysilane in the mixed solution B is 10%, and the rest of the procedure is identical to preparation example 2.
Preparation example 5
Preparation example 5 differs from preparation example 2 in that the weight percentage of gamma- (2, 3-glycidoxy) propyltrimethoxysilane in the mixed solution B is 15%, and the rest of the steps are identical to those of preparation example 2.
Preparation example 6
The difference between the preparation example 6 and the preparation example 4 is that the volume ratio of the mixed solution B to the mixed solution A is 1:3, the remaining steps are identical to those of preparation 4.
Preparation example 7
The difference between the preparation example 7 and the preparation example 4 is that the volume ratio of the mixed solution B to the mixed solution A is 1:4, the remaining steps are identical to those of preparation 4.
Preparation example 8
Preparation example 8 differs from preparation example 6 in that the conductive medium in the mixed solution A is nickel powder, and the rest steps are identical to those of preparation example 6.
Preparation example 9
Preparation example 9 differs from preparation example 6 in that the conductive medium in the mixed solution a is graphene, and the rest of the steps are identical to those of preparation example 6.
Examples
Example 1
Referring to fig. 1, embodiment 1 provides a conductive PU synthetic leather, including a base cloth layer 1, a conductive layer 2 is disposed on a sidewall of the base cloth layer 1, a composite layer 4 is disposed on a sidewall of the base cloth layer 1 facing away from the conductive layer 2, and a surface layer 3 is disposed on a sidewall of the conductive layer 2 facing away from the base cloth layer 1.
Embodiment 1 also provides a method for preparing the conductive PU synthetic leather, comprising the following steps:
preparing a conductive layer 2: adding 80kg of polyurethane and 4kg of the modified conductive medium in preparation example 1 into 100kg of solvent, uniformly stirring to obtain conductive coating, coating the conductive coating on a base cloth layer 1, and drying at 100 ℃ to form a conductive layer 2; wherein the solvent is butanone; the base cloth layer 1 is made of leather base cloth;
Preparation of table layer 3: adding 10kg of surface treating agent into 5kg of graphene dispersion liquid, uniformly stirring to obtain a surface treatment material, coating the surface treatment material on the conductive layer 2, and drying at 95 ℃ to obtain a surface treatment layer 3; wherein the surface treating agent is an organosilicon surfactant;
Preparing a composite layer 4: adding 100kg of polyurethane and 15kg of color paste into 70kg of solvent, uniformly mixing to obtain a composite material, coating the composite material on the side wall of the base cloth layer 1, which is far away from the conductive layer 2, and drying at 100 ℃ to obtain a composite layer 4, thereby obtaining conductive PU synthetic leather; wherein the solvent is butanone, and the color paste can be selected according to the required color.
As shown in Table 1, the main difference between examples 1 to 9 is the selection of the modified conductive medium.
Table 1 selection of modified conductive Medium for examples 1-9
| Sample of | Modified conductive medium |
| Example 1 | Preparation example 1 |
| Example 2 | Preparation example 2 |
| Example 3 | Preparation example 3 |
| Example 4 | Preparation example 4 |
| Example 5 | Preparation example 5 |
| Example 6 | Preparation example 6 |
| Example 7 | Preparation example 7 |
| Example 8 | Preparation example 8 |
| Example 9 | Preparation example 9 |
As shown in table 2, the main difference between examples 6, 10 and 11 is that the ratio of the raw materials in the conductive layer 2 and the surface layer 3 is not used.
Example 12
Example 12 differs from example 10 in that conductive layer 2 was prepared: adding 100kg of polyurethane, 6kg of modified conductive medium in preparation example 6, 0.1kg of softener and 25kg of color paste into 120kg of solvent, uniformly stirring to obtain conductive coating, coating the conductive coating on a base cloth layer 1, and drying at 100 ℃ to form a conductive layer 2; wherein the softener is ester quaternary ammonium salt; the color paste can be selected according to the required color; the remaining steps are in accordance with example 10.
Example 13
Example 13 differs from example 12 in that layer 3 at the table was prepared: adding 15kg of surface treating agent, 0.05 kg of polyether defoamer and 1.5kg of cross-linking agent into 10kg of graphene dispersion liquid, uniformly stirring to obtain surface treatment material, coating the surface treatment material on the conductive layer 2, and drying at 95 ℃ to obtain a surface treatment layer 3; wherein the cross-linking agent is hexamethylol melamine.
Comparative example
Comparative example 1
Comparative example 1 differs from example 1 in that layer 3 at the table was prepared: 10kg of surface treating agent is coated on the conductive layer 2, and is dried at 95 ℃ to obtain a surface layer 3; wherein the surface treatment agent is a silicone surfactant, the remaining steps are in accordance with example 1.
Comparative example 2
Comparative example 2 differs from example 1 in that a conductive layer 2 was prepared: adding 80kg of polyurethane and 4kg of nano carbon black into 100kg of solvent, uniformly stirring to obtain conductive coating, coating the conductive coating on the base cloth layer 1, and drying at 100 ℃ to form a conductive layer 2; the remaining steps are in accordance with example 1.
Performance test
1. Conductive properties: the resistivity tester is used for testing the resistivity of the surface of the synthetic leather, the distance between the positive electrode and the negative electrode is 10cm, the conductivity is stronger when the resistivity is smaller, and the synthetic leather is an insulating material when the resistivity reaches more than 10 7 omega.
2. Hand feel test: ten testers between 22 and 25 are selected, the synthetic leather in each example is used, then the hand feeling of the synthetic leather is scored, the score is 1 to 10 minutes, the average is taken, and one decimal point is reserved after the decimal point.
TABLE 3 Performance test results of synthetic leather
In combination with example 1 and comparative example 1, the resistivity of the synthetic leather in comparative example 1 is far higher than that of example 1 and exceeds 10 7 Ω, and the synthetic leather is an insulating material, and it can be seen that when the conductive layer 2 is treated with the surface treating agent, graphene dispersion liquid is added to form a conductive structure between graphene in the surface layer 3 and a conductive medium, so that the synthetic leather after surface treatment still has conductive performance.
By combining example 1 and comparative example 2, the resistivity of the synthetic leather in example 1 is much lower than that of comparative example 2, so that the conductive performance of the synthetic leather in example 1 is better, and it can be seen that the conductive medium is modified by using gamma- (2, 3-glycidoxy) propyltrimethoxysilane to form hydrophilic groups on the conductive medium, so that the conductive medium is conveniently and uniformly distributed in the conductive layer 2, and thus the conductive performance of the prepared synthetic leather is improved.
In combination with examples 1-3, the synthetic leather in example 2 has the smallest resistivity, so that the synthetic leather in example 2 has the strongest conductivity, and it can be seen that when the conductive medium is modified, the weight percentage of the conductive medium in the mixed solution a is increased when the weight percentage of the conductive medium in the mixed solution a is 2% -8%, and the modifying effect of the modified conductive medium shows a tendency of rising first and then decreasing.
In combination with examples 2, 4 and 5, the synthetic leather in example 4 has the smallest resistivity, so that the synthetic leather in example 4 has the strongest conductivity, and it can be seen that when the conductive medium is modified, the weight percentage of gamma- (2, 3-glycidoxy) propyltrimethoxysilane in the mixed solution B is increased when the weight percentage of gamma- (2, 3-glycidoxy) propyltrimethoxysilane in the mixed solution B is 5% -15%, and the modifying effect of the modified conductive medium tends to be increased and then decreased.
In combination with examples 4, 6 and 7, the synthetic leather in example 6 has the smallest resistivity, so that the synthetic leather in example 6 has the strongest conductivity, and it can be seen that when the conductive medium is modified, the volume ratio of the mixed solution B to the mixed solution a is 1: in the case of (2-4), the amount of the conductive medium used is increased, and the effect of modifying the conductive medium tends to be increased and then decreased.
In combination with example 6, example 8 and example 9, the synthetic leather in example 6 has the smallest resistivity, so that the synthetic leather in example 6 has the strongest conductivity, and the conductive medium is preferably nano carbon black, and the specific surface area of the nano carbon black is larger, so that the conductive structure is conveniently formed, and the conductivity of the prepared synthetic leather is improved.
In combination with examples 6, 10 and 11, the synthetic leather in example 10 has the smallest resistivity, so that the synthetic leather in example 10 has the strongest conductivity, and it can be seen that when the conductive layer 2 and the surfacing layer 3 are prepared, the use amount of raw materials is increased, and the conductivity of the prepared synthetic leather tends to be increased before reduced.
In combination with examples 10 and 12, the resistivity of the synthetic leather in examples 10 and 12 was not significantly changed, but the hand feel score of the synthetic leather in example 12 was higher than that of example 10, and it was found that the addition of the esterquat in the preparation of the conductive layer 2 reduced the friction between the fibers in the leather base fabric, so that the synthetic leather was softer, and thus the hand feel of the synthetic leather was improved.
In combination with examples 12 and 13, the resistivity of the synthetic leather in examples 12 and 13 was not significantly changed, but the hand feel score of the synthetic leather in example 13 was higher than that of example 12, and it was found that the hand feel of the synthetic leather was further improved by adding polyether defoamer and hexamethylol melamine at the time of preparing the top layer 3.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (5)
1. The utility model provides a conductive PU synthetic leather which characterized in that: the novel conductive fabric comprises a base fabric layer (1), wherein a conductive layer (2) is arranged on the base fabric layer (1), a composite layer (4) is arranged on the side wall, deviating from the conductive layer (2), of the base fabric layer (1), and a surface layer (3) is arranged on the side wall, deviating from the base fabric layer (1), of the conductive layer (2); the raw materials of the surface layer (3) comprise the following components in parts by weight: 5-15 parts of graphene dispersion liquid and 10-20 parts of surface treatment agent; the raw materials of the conductive layer (2) comprise the following components in parts by weight: 100-140 parts of solvent, 80-120 parts of polyurethane and 4-8 parts of modified conductive medium; the preparation method of the modified conductive medium comprises the following steps: uniformly mixing a conductive medium, ethanol and water to obtain a mixed solution A; the conductive medium is one or more of nano carbon black, nickel powder and graphene; the weight percentage of the conductive medium in the mixed solution A is 2% -8%; adding gamma- (2, 3-glycidoxy) propyl trimethoxy silane into ethanol to obtain a mixed solution B; the weight percentage of the gamma- (2, 3-glycidoxy) propyl trimethoxy silane in the mixed solution B is 5-15 percent; adding the mixed solution B into the mixed solution A under the heating condition, reacting for 10-20min to obtain a modified mixed solution, centrifuging, drying, washing and drying to obtain a modified conductive medium; the volume ratio of the mixed solution B to the mixed solution A is 1: (2-4).
2. The conductive PU synthetic leather of claim 1 wherein: the raw materials of the surface layer (3) further comprise 0.01-0.1 part by weight of polyether defoamer and 1-2 parts by weight of cross-linking agent, wherein the cross-linking agent is hexamethylol melamine.
3. The conductive PU synthetic leather of claim 1 wherein: the raw materials of the conductive layer (2) further comprise 0.05-0.15 part by weight of softener and 20-30 parts by weight of color paste, wherein the softener is ester quaternary ammonium salt.
4. The conductive PU synthetic leather of claim 1 wherein: the raw materials of the composite layer (4) comprise the following components in parts by weight: 80-120 parts of polyurethane, 60-80 parts of solvent and 10-20 parts of color paste.
5. A preparation method of conductive PU synthetic leather is characterized in that: the method comprises the following steps:
Preparation of conductive layer (2): adding polyurethane, a modified conductive medium, a softener and color paste into a solvent, uniformly stirring to obtain a conductive coating, coating the conductive coating on a base cloth layer (1), and drying to form a conductive layer (2); the preparation method of the modified conductive medium comprises the following steps: uniformly mixing a conductive medium, ethanol and water to obtain a mixed solution A; the conductive medium is one or more of nano carbon black, nickel powder and graphene; the weight percentage of the conductive medium in the mixed solution A is 2% -8%; adding gamma- (2, 3-glycidoxy) propyl trimethoxy silane into ethanol to obtain a mixed solution B; the weight percentage of the gamma- (2, 3-glycidoxy) propyl trimethoxy silane in the mixed solution B is 5-15 percent; adding the mixed solution B into the mixed solution A under the heating condition, reacting for 10-20min to obtain a modified mixed solution, centrifuging, drying, washing and drying to obtain a modified conductive medium; the volume ratio of the mixed solution B to the mixed solution A is 1: (2-4);
Preparation of table layer (3): adding a surface treatment agent, a polyether defoamer and a cross-linking agent into the graphene dispersion liquid, uniformly stirring to obtain a surface treatment material, coating the surface treatment material on the conductive layer (2), and drying to obtain a surface treatment layer (3);
Preparation of composite layer (4): and adding polyurethane and color paste into the solvent, uniformly mixing to obtain a composite material, coating the composite material on the side wall of the base cloth layer (1) deviating from the conductive layer (2), and drying to obtain a composite layer (4), thereby obtaining the conductive PU synthetic leather.
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