CN110643274A - Inorganic-polymer composite conductive waterborne polyurethane emulsion coating agent and preparation method and application thereof - Google Patents

Inorganic-polymer composite conductive waterborne polyurethane emulsion coating agent and preparation method and application thereof Download PDF

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Publication number
CN110643274A
CN110643274A CN201910801200.XA CN201910801200A CN110643274A CN 110643274 A CN110643274 A CN 110643274A CN 201910801200 A CN201910801200 A CN 201910801200A CN 110643274 A CN110643274 A CN 110643274A
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inorganic
polyurethane emulsion
polymer composite
waterborne polyurethane
composite conductive
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邓健
粟斯伟
殷国益
梁永红
于泽浩
张圣祖
董会杰
夏明桂
彭雄义
刘仰硕
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Wuhan Textile University
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Wuhan Textile University
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/08—Polyurethanes from polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4825—Polyethers containing two hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/24—Electrically-conducting paints
    • 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
    • D06N3/12—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
    • D06N3/142—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 mixture of polyurethanes with other resins in the same layer
    • D06N3/143—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 mixture of polyurethanes with other resins in the same layer with polyurethanes and other polycondensation or polyaddition products, e.g. aminoplast
    • 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
    • D06N3/146—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 characterised by the macromolecular diols used
    • 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
    • D06N3/147—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 characterised by the isocyanates used
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2255—Oxides; Hydroxides of metals of molybdenum
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • 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
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/04—Vegetal fibres
    • D06N2201/042—Cellulose fibres, e.g. cotton
    • D06N2201/045—Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
    • 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
    • D06N2203/00—Macromolecular materials of the coating layers
    • D06N2203/06—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N2203/068—Polyurethanes
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    • 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
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    • D06N2211/00—Specially adapted uses
    • D06N2211/10—Clothing

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • Organic Chemistry (AREA)
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  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The invention relates to an inorganic-polymer composite conductive waterborne polyurethane emulsion coating agent and a preparation method and application thereof, which are characterized in that polyethylene glycol, toluene diisocyanate, dimethylolpropionic acid and the like are used as main raw materials, in the preparation process, polymer polyaniline and inorganic molybdenum trioxide are mixed into an intermediate product, and then the mixture is emulsified to prepare inorganic-polymer composite conductive waterborne polyurethane emulsion; after the emulsion prepared by the invention is used for coating finishing of bast fiber fabric, the conductivity of the bast fiber fabric is obviously enhanced. The preparation method of the inorganic-polymer composite conductive waterborne polyurethane emulsion coating agent is simple, the application is simple and convenient, and the popularization is easy.

Description

Inorganic-polymer composite conductive waterborne polyurethane emulsion coating agent and preparation method and application thereof
Technical Field
The invention belongs to the technical field of waterborne polyurethane coating agents, and particularly relates to an inorganic-polymer composite conductive waterborne polyurethane emulsion coating agent, and a preparation method and application thereof.
Background
With the rapid development of modern society, people pursue increasingly higher quality of life, especially in the aspect of clothing, under the influence, intelligent clothes are produced. The appearance of the intelligent clothes timely relieves the aesthetic fatigue of people, and stimulates the curiosity and purchasing desire of people. In recent years, wearable devices (such as a bracelet, a watch and the like) are widely popular, and as smart clothes are more diversified and have various patterns, the smart clothes are expected to become substitutes of the wearable devices, and the wearable devices are promoted to develop into deeper fields. The intelligent clothing puts higher requirements on the clothing fabric, such as: conductivity, resistance to washing, etc. Therefore, the conductivity of the fabric of the intelligent garment plays an important role in the healthy development of the intelligent garment.
The realization of the conductivity of the intelligent garment fabric can be solved by several methods: (1) arranging a conductive wire in the fabric; (2) the fibers are conductive themselves; (3) the surface of the fiber is coated with a layer of conductive material. Among these methods, method (1) may cause the garment to be uncomfortable to wear; the method (2) can increase the cost of the intelligent garment material; the method (3) has wide development and development space.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an inorganic-polymer composite conductive waterborne polyurethane emulsion coating agent, and a preparation method and application thereof.
The invention aims to provide an inorganic-polymer composite conductive waterborne polyurethane emulsion coating agent, which is a waterborne polyurethane emulsion coating agent, wherein the emulsion contains inorganic materials of nano-scale molybdenum trioxide and polymer polyaniline, and the molybdenum trioxide and the polyaniline are good conductive materials.
The invention also aims to provide a preparation method of the inorganic-polymer composite conductive waterborne polyurethane emulsion, which comprises the following steps:
adding a proper amount of polyethylene glycol into a three-neck flask, and vacuumizing for 1-2 hours at the temperature of 90-95 ℃ to remove water; cooling to 60-80 ℃, adding toluene diisocyanate for reaction, wherein the reaction time is 1-2 h; determining the content of NCO by referring to an HG/T2409-1992 method, and adding dimethylolpropionic acid to carry out chain extension reaction for 0.5-1 h; adding polyaniline and nano-scale molybdenum trioxide, and uniformly stirring; cooling to 0-8 ℃, adding a mixed solution of isopropanol dissolved with sodium bisulfite and water, and stirring at a high speed for 0.5-1 h; and after the reaction is finished, adjusting the pH value to 3-4 to obtain the aqueous polyurethane emulsion.
Preferably, the molecular weight of the polyethylene glycol is 400, and the mass molar ratio of the polyethylene glycol to the toluene diisocyanate to the dimethylolpropionic acid is as follows: 1: 1.5-3.0: 0.1-0.3.
Preferably, the volume ratio of the isopropanol to the water is 1: 2.0-3.0, and the mass ratio of the sodium bisulfite to the mixed solution is 1-5%.
Preferably, the mass ratio of the polyaniline (g) to the nano-scale molybdenum trioxide (g) is 1: 1-3.
The invention also aims to provide an application of the inorganic-polymer composite conductive waterborne polyurethane emulsion, and the application method comprises the following steps:
tightening the fabric on a stretching frame, uniformly coating the coating agent on the fabric by a scraper, wherein the dry weight of the coating is 20-30 g/m2Drying at 90 ℃ for 3 minutes, and baking at 140-170 ℃ for 5 minutes to obtain a coated fabric; preferably, the fabric is suitable for use in a linen fabric comprising: ramie fabrics, sisal fabrics and hemp fabrics.
The invention has the following remarkable characteristics:
(1) the polyurethane emulsion prepared by the invention contains polyaniline and molybdenum trioxide, wherein the polyaniline is a high polymer with good electric conductivity, and the molybdenum trioxide is an inorganic substance with good electric conductivity.
(2) After the polyurethane emulsion prepared by the invention is applied to the bast fiber fabric, the resistivity of the ramie coated fabric, the hemp coated fabric and the sisal coated fabric is obviously reduced, which shows that the conductivity of the ramie coated fabric, the hemp coated fabric and the sisal coated fabric is enhanced; while the hemp fabric without coating finish has larger resistivity.
(3) The inorganic-polymer composite conductive waterborne polyurethane emulsion prepared by the invention has simple preparation method and wide raw material source; the application of the aqueous polyurethane emulsion is also more convenient and easy to popularize.
Detailed Description
The examples described below illustrate the invention in detail.
Example 1
The invention discloses a preparation method of inorganic-polymer composite conductive waterborne polyurethane emulsion, which comprises the following steps:
adding 0.1mol of polyethylene glycol with the molecular weight of 400 into a three-neck flask, and vacuumizing for 1.5h at 93 ℃ to remove water; cooling to 70 ℃, adding 0.25mol of toluene diisocyanate for reaction, wherein the reaction time is 1.5 h; determining the content of NCO by referring to an HG/T2409-1992 method, and adding 0.02mol of dimethylolpropionic acid to carry out chain extension reaction for 0.7 h; adding 1g of polyaniline and 2g of nano-scale molybdenum trioxide, and uniformly stirring; cooling to 5 ℃, adding a mixed solution of 10mL of isopropanol and 20mL of water in which 1.05g of sodium bisulfite is dissolved, and stirring at a high speed for 0.7 h; and after the reaction is finished, adjusting the pH value to 3-4 to obtain the aqueous polyurethane emulsion.
The invention also aims to provide an application of the inorganic-polymer composite conductive waterborne polyurethane emulsion, which comprises the following steps:
the ramie fabric is tightened on a stretching frame, the coating agent is evenly coated on the ramie fabric by a scraper, and the dry weight of the coating is 25.3g/m2And drying at 90 ℃ for 3 minutes, and baking at 150-160 ℃ for 5 minutes to obtain the ramie coated fabric.
Example 2
The invention discloses a preparation method of inorganic-polymer composite conductive waterborne polyurethane emulsion, which comprises the following steps:
adding 0.1mol of polyethylene glycol with the molecular weight of 400 into a three-neck flask, and vacuumizing for 1h at 90 ℃ to remove water; cooling to 70 ℃, adding 0.15mol of toluene diisocyanate for reaction, wherein the reaction time is 1 h; determining the content of NCO by referring to an HG/T2409-1992 method, and adding 0.01mol of dimethylolpropionic acid to carry out chain extension reaction for 0.5 h; adding 1g of polyaniline and 1g of nano-grade molybdenum trioxide, and uniformly stirring; cooling to 3 ℃, adding a mixed solution of 10mL of isopropanol and 25mL of water in which 0.35g of sodium bisulfite is dissolved, and stirring at a high speed for 0.5 h; and after the reaction is finished, adjusting the pH value to 3-4 to obtain the aqueous polyurethane emulsion.
The invention also aims to provide an application of the inorganic-polymer composite conductive waterborne polyurethane emulsion, which comprises the following steps:
tightening the hemp fabric on a stretching frame, uniformly coating the coating agent on the hemp fabric by a scraper, wherein the dry weight of the coating is 26.8g/m2And drying at 90 ℃ for 3 minutes and baking at 150-160 ℃ for 5 minutes to obtain the hemp coated fabric.
Example 3
The invention discloses a preparation method of inorganic-polymer composite conductive waterborne polyurethane emulsion, which comprises the following steps:
adding 0.1mol of polyethylene glycol with the molecular weight of 400 into a three-neck flask, and vacuumizing for 2h at the temperature of 95 ℃ to remove water; cooling to 70 ℃, adding 0.3mol of toluene diisocyanate for reaction, wherein the reaction time is 2 h; determining the content of NCO by referring to an HG/T2409-1992 method, and adding 0.03mol of dimethylolpropionic acid to carry out chain extension reaction for 0.5 h; adding 1g of polyaniline and 3g of nano-grade molybdenum trioxide, and uniformly stirring; cooling to 1 ℃, adding a mixed solution of 10mL of isopropanol and 30mL of water in which 2g of sodium bisulfite is dissolved, and stirring at a high speed for 2 hours; and after the reaction is finished, adjusting the pH value to 3-4 to obtain the aqueous polyurethane emulsion.
The invention also aims to provide an application of the inorganic-polymer composite conductive waterborne polyurethane emulsion, which comprises the following steps:
tightening the sisal fabric on a frame, uniformly coating the coating agent on the sisal fabric by a scraper, wherein the dry weight of the coating is 29.1g/m2And drying at 90 ℃ for 3 minutes and drying at 160-170 ℃ for 5 minutes to obtain the sisal hemp coating fabric.
Performance examples:
the electrical resistivity of the ramie coated fabric, the hemp coated fabric and the sisal coated fabric prepared in the examples 1 to 3 is tested according to the industry standard QJ 3074-1998, and the test results are shown in Table 1.
TABLE 1 test results for resistivity of coated and uncoated fabrics prepared in examples 1-3
Item Ramie coated fabric Ramie fabric Hemp coated fabric Hemp fabric Sisal hemp coated fabric Sisal hemp fabric
Resistivity/omega. cm 2.39×10－4 3.78×10－1 2.27×10－4 3.56×10－1 2.35×10－4 4.86×10－1
As can be seen from table 1, the electrical resistivity of the ramie-coated fabric, the hemp-coated fabric, and the sisal-coated fabric was low, and the electrical resistivity of the fabric without the coating finish was high. The results show that the resistivity of the waterborne polyurethane emulsion is obviously reduced and the conductivity of the waterborne polyurethane emulsion is enhanced after the waterborne polyurethane emulsion is applied to the coating finishing of the linen fabric.

Claims (5)

1. The preparation method of the inorganic-polymer composite conductive waterborne polyurethane emulsion is characterized by comprising the following steps:
adding a proper amount of polyethylene glycol into a three-neck flask, and vacuumizing for 1-2 hours at the temperature of 90-95 ℃ to remove water; cooling to 60-80 ℃, adding toluene diisocyanate for reaction, wherein the reaction time is 1-2 h; determining the content of NCO by referring to an HG/T2409-1992 method, and adding dimethylolpropionic acid to carry out chain extension reaction for 0.5-1 h; adding polyaniline and nano-scale molybdenum trioxide, and uniformly stirring; cooling to 0-8 ℃, adding a mixed solution of isopropanol dissolved with sodium bisulfite and water, and stirring at a high speed for 0.5-1 h; after the reaction is finished, adjusting the pH value to 3-4 to prepare a water-based polyurethane emulsion;
the molecular weight of the polyethylene glycol is 400, and the mass molar ratio of the polyethylene glycol to the toluene diisocyanate to the dimethylolpropionic acid is as follows: 1: 1.5-3.0: 0.1-0.3, wherein the volume ratio of the isopropanol to the water is 1: 2.0-3.0; the mass ratio of the sodium bisulfite to the mixed solution of the isopropanol and the water is 1-5%.
2. The method for preparing the inorganic-polymer composite conductive waterborne polyurethane emulsion according to claim 1, wherein the method comprises the following steps: the mass ratio of the polyaniline (g) to the nano molybdenum trioxide (g) is 1: 1-3.
3. The inorganic-polymer composite conductive waterborne polyurethane emulsion is characterized by being prepared by the preparation method of the inorganic-polymer composite conductive waterborne polyurethane emulsion as claimed in any one of claims 1-2.
4. The application of the inorganic-polymer composite conductive waterborne polyurethane emulsion as claimed in claim 1, wherein the specific application method comprises the following steps: tightening the fabric on a stretching frame, uniformly coating the coating agent on the fabric by a scraper, wherein the dry weight of the coating is 20-30 g/m2And drying at 90 ℃ for 3 minutes and baking at 140-170 ℃ for 5 minutes to obtain the coated fabric.
5. The application of the inorganic-polymer composite conductive waterborne polyurethane emulsion as claimed in claim 4, wherein the inorganic-polymer composite conductive waterborne polyurethane emulsion comprises the following components in percentage by weight: the fabric is suitable for linen fabrics and comprises: ramie fabrics, sisal fabrics and hemp fabrics.
CN201910801200.XA 2019-08-28 2019-08-28 Inorganic-polymer composite conductive waterborne polyurethane emulsion coating agent and preparation method and application thereof Pending CN110643274A (en)

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* Cited by examiner, † Cited by third party
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Application publication date: 20200103