CN113429662A - Bright color-changing sunshade net and preparation method thereof - Google Patents
Bright color-changing sunshade net and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
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- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
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Abstract
The invention discloses a bright color-changing sunshade net and a preparation method thereof; relates to the technical field of sunshade net production, and is prepared from the following components: the high-density polyethylene coating comprises high-density polyethylene, glass fiber, an antioxidant, nano white carbon black composite diatomite, PET, 20 ℃ reversible temperature-sensitive color-changing powder, 25 ℃ reversible temperature-sensitive color-changing powder, 30 ℃ reversible temperature-sensitive color-changing powder, polydimethylsiloxane, a coupling agent, a lubricant, a plasticizer and a flame retardant; the invention provides a brilliant color-changing sunshade net and a preparation method thereof, the sunshade net prepared by the invention has excellent ageing resistance and mechanical property, can be used in four seasons, has low water absorption rate, can be well adapted to regions with more rainwater, and has long service life.
Description
Technical Field
The invention belongs to the technical field of sunshade net production, and particularly relates to a brilliant color-changing sunshade net and a preparation method thereof.
Background
The sunshade net is also called shading net, and is a latest special protective covering material for agriculture, fishery, animal husbandry, wind prevention, soil covering and the like, which is popularized in more than 10 years. After covering in summer, the effects of light blocking, rain shielding, moisture preservation and temperature reduction are achieved. The sunshade net has certain heat preservation and humidification functions after covering in winter and spring, and is widely applied to sunshade of courtyards as people seek higher and higher comfort, and can also be used for sunshade at doorways of some shops.
The sunshade net that adopts among the prior art can only be used for the sunshade in summer, needs good sunshine when winter, but because its stronger sunshade effect can lead to adverse effect on the contrary, simultaneously, current sunshade net is relatively poor to be able to bear or endure ultraviolet ageing properties, uses for a long time, and easy fracture, life reduces by a wide margin, causes to need constantly change the sunshade net, not only wastes time and energy, still needs a large amount of costs, consequently, needs to carry out the performance improvement to current sunshade net.
Disclosure of Invention
The invention aims to provide a brilliant color-changing sunshade net and a preparation method thereof, and aims to solve the defects in the prior art.
The technical scheme adopted by the invention is as follows:
a brilliant color-changing sunshade net is prepared from the following components in parts by weight: 110-125 parts of high-density polyethylene, 2-8 parts of glass fiber, 1-5 parts of antioxidant, 21-35 parts of nano white carbon black composite diatomite, 8-10 parts of PET, 3-5 parts of reversible temperature-sensitive color-changing powder at 20 ℃, 3-5 parts of reversible temperature-sensitive color-changing powder at 25 ℃, 3-5 parts of reversible temperature-sensitive color-changing powder at 30 ℃, 2-6 parts of polydimethylsiloxane, 0.1-0.4 part of coupling agent, 1.3-1.6 parts of lubricant, 8-12.5 parts of plasticizer and 6-10 parts of flame retardant.
As a further technical scheme: the preparation method of the nano white carbon black composite diatomite comprises the following steps:
(1) uniformly dispersing the nano white carbon black into an ethanol solution to obtain a nano white carbon black dispersion liquid;
(2) adding a silane coupling agent into the nano white carbon black dispersion liquid, and stirring at the rotating speed of 500r/min for 40min to obtain a modified dispersion liquid;
(3) uniformly dispersing diatomite into a sodium maleate solution to obtain a diatomite dispersion solution, then mixing the diatomite dispersion solution and a modified dispersion solution, adding the mixture into a vacuum impregnation reaction kettle, adding magnesium hydroxycarbonate, uniformly stirring at a high speed, then carrying out vacuum impregnation treatment for 2 hours, and then discharging to obtain a mixture;
(3) and carrying out suction filtration, washing and drying on the mixture to obtain the nano white carbon black composite diatomite.
As a further technical scheme: the mixing mass ratio of the nano white carbon black to the ethanol solution is 30 g: 500 mL;
the mass fraction of the ethanol solution is 35 percent;
the mixing mass ratio of the nano white carbon black to the silane coupling agent is 12: 1.
as a further technical scheme: the mixing mass ratio of the diatomite to the sodium maleate solution is 450 g: 500 mL;
the mass fraction of the sodium maleate solution is 3.8 percent;
the mixing mass ratio of the nano white carbon black dispersion liquid to the modified dispersion liquid to the hydroxyl magnesium carbonate is 1: 5: 0.2;
the vacuum impregnation temperature is 80 ℃ and the vacuum degree is 0.01 MPa.
As a further technical scheme: the antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite.
As a further technical scheme: the reversible thermochromic powder changes color into yellow at the temperature of 20 ℃; the reversible temperature-sensitive color-changing powder changes into red at 25 ℃ and changes into blue at 30 ℃.
As a further technical scheme: the coupling agent is a titanate coupling agent;
the lubricant is ethylene bis stearamide.
As a further technical scheme: the plasticizer is triethyl phthalate;
the flame retardant is magnesium hydroxide.
A preparation method of a brilliant color-changing sunshade net comprises the following steps: the method comprises the following steps:
(1) weighing high-density polyethylene, glass fiber, an antioxidant, nano white carbon black composite diatomite, PET, 20 ℃ reversible temperature-sensitive color-changing powder, 25 ℃ reversible temperature-sensitive color-changing powder, 30 ℃ reversible temperature-sensitive color-changing powder, polydimethylsiloxane, a coupling agent, a lubricant, a plasticizer and a flame retardant in parts by weight, and then adding the mixture into a stirrer to stir uniformly at a high speed to obtain a mixture;
(2) adding the mixture into a double-screw extruder for melt extrusion, and performing water-cooling wire drawing to obtain monofilaments;
(3) and dividing the dipped monofilaments into warp and weft raw materials, warping the warp yarns, and weaving the warp yarns and the weft yarns together after warp threading to obtain the sunshade net.
The melt mass flow rate of the resin is an indirect representation of the average relative molecular mass, and basically reflects the size of the average relative molecular mass under the condition that the distribution range of the relative molecular mass is relatively close, the larger the relative molecular mass is (the smaller the melt mass flow rate is), the higher the entanglement degree between chains, the higher the melt viscosity and the larger the processing difficulty are, so that the melt mass flow rate can be improved by the small fish gull, the processing difficulty is reduced, the processing performance is improved, and the quality of a finished sunshade net product is improved.
The sunshade net prepared by the invention adopts components with wider relative molecular mass distribution, and during the extrusion processing, the plasticizer is introduced to plasticize the high relative molecular mass part, so that the rheological property becomes good, and the mechanical property of the finished product is obviously improved.
The sunshade net prepared by the invention has perfect crystals on the molecular structure, has more lamella crystals, and is beneficial to secondary stretching to a higher multiple, and has higher stretching performance.
According to the invention, the prepared nano white carbon black composite diatomite is introduced, so that the anti-aging performance of the sunshade net can be obviously improved. The invention adopts the nano white carbon black which has an amorphous structure, a three-dimensional structure is formed by stacking tetrahedrons formed by a plurality of silicon (Si) atoms and oxygen (O) atoms, and the nano white carbon black has the characteristics of small particle size, large specific surface area, high surface activity, easy formation of high-structure aggregates and the like, not only can well reinforce a sunshade screen, but also can enable the sunshade screen to become more compact and show some special optical properties, but directly introduces the nano white carbon black which is not easy to disperse and easy to aggregate, so that the invention can improve surface groups by preparing the nano white carbon black composite diatomite, greatly improves the interface compatibility between the nano white carbon black composite diatomite and resin, has certain shielding effect on ultraviolet light and extremely strong ultraviolet absorption and infrared reflection due to the unique structure of the prepared nano white carbon black composite diatomite, the ultraviolet light absorption rate within 400nm of the wavelength is more than 85%, the infrared light reflectivity beyond 400nm of the wavelength can also reach more than 80%, the ultraviolet aging resistance of the sunshade net is greatly improved, the sunshade net can better adapt to longer sun-drying time, and the service life of the sunshade net is obviously guaranteed.
Advantageous effects
The invention provides a brilliant color-changing sunshade net and a preparation method thereof, the sunshade net prepared by the invention has excellent ageing resistance and mechanical property, can be used in four seasons, has low water absorption rate, can be well adapted to regions with more rainwater, and has long service life.
Detailed Description
A brilliant color-changing sunshade net is prepared from the following components in parts by weight: 110-125 parts of high-density polyethylene, 2-8 parts of glass fiber, 1-5 parts of antioxidant, 21-35 parts of nano white carbon black composite diatomite, 8-10 parts of PET, 3-5 parts of reversible temperature-sensitive color-changing powder at 20 ℃, 3-5 parts of reversible temperature-sensitive color-changing powder at 25 ℃, 3-5 parts of reversible temperature-sensitive color-changing powder at 30 ℃, 2-6 parts of polydimethylsiloxane, 0.1-0.4 part of coupling agent, 1.3-1.6 parts of lubricant, 8-12.5 parts of plasticizer and 6-10 parts of flame retardant.
As a further technical scheme: the preparation method of the nano white carbon black composite diatomite comprises the following steps:
(1) uniformly dispersing the nano white carbon black into an ethanol solution to obtain a nano white carbon black dispersion liquid;
(2) adding a silane coupling agent into the nano white carbon black dispersion liquid, and stirring at the rotating speed of 500r/min for 40min to obtain a modified dispersion liquid;
(3) uniformly dispersing diatomite into a sodium maleate solution to obtain a diatomite dispersion solution, then mixing the diatomite dispersion solution and a modified dispersion solution, adding the mixture into a vacuum impregnation reaction kettle, adding magnesium hydroxycarbonate, uniformly stirring at a high speed, then carrying out vacuum impregnation treatment for 2 hours, and then discharging to obtain a mixture;
(3) and carrying out suction filtration, washing and drying on the mixture to obtain the nano white carbon black composite diatomite.
As a further technical scheme: the mixing mass ratio of the nano white carbon black to the ethanol solution is 30 g: 500 mL;
the mass fraction of the ethanol solution is 35 percent;
the mixing mass ratio of the nano white carbon black to the silane coupling agent is 12: 1.
as a further technical scheme: the mixing mass ratio of the diatomite to the sodium maleate solution is 450 g: 500 mL;
the mass fraction of the sodium maleate solution is 3.8 percent;
the mixing mass ratio of the nano white carbon black dispersion liquid to the modified dispersion liquid to the hydroxyl magnesium carbonate is 1: 5: 0.2;
the vacuum impregnation temperature is 80 ℃ and the vacuum degree is 0.01 MPa.
As a further technical scheme: the antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite.
As a further technical scheme: the reversible thermochromic powder changes color into yellow at the temperature of 20 ℃; the reversible temperature-sensitive color-changing powder changes into red at 25 ℃ and changes into blue at 30 ℃.
As a further technical scheme: the coupling agent is a titanate coupling agent;
the lubricant is ethylene bis stearamide.
As a further technical scheme: the plasticizer is triethyl phthalate;
the flame retardant is magnesium hydroxide.
A preparation method of a brilliant color-changing sunshade net comprises the following steps: the method comprises the following steps:
(1) weighing high-density polyethylene, glass fiber, an antioxidant, nano white carbon black composite diatomite, PET, 20 ℃ reversible temperature-sensitive color-changing powder, 25 ℃ reversible temperature-sensitive color-changing powder, 30 ℃ reversible temperature-sensitive color-changing powder, polydimethylsiloxane, a coupling agent, a lubricant, a plasticizer and a flame retardant in parts by weight, and then adding the mixture into a stirrer to stir uniformly at a high speed to obtain a mixture;
(2) adding the mixture into a double-screw extruder for melt extrusion, and performing water-cooling wire drawing to obtain monofilaments;
(3) and dividing the dipped monofilaments into warp and weft raw materials, warping the warp yarns, and weaving the warp yarns and the weft yarns together after warp threading to obtain the sunshade net.
The following will clearly and completely describe the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A brilliant color-changing sunshade net is prepared from the following components in parts by weight: 110 parts of high-density polyethylene, 2 parts of glass fiber, 1 part of antioxidant, 21 parts of nano white carbon black composite diatomite, 8 parts of PET, 3 parts of reversible temperature-sensitive color-changing powder at 20 ℃, 3 parts of reversible temperature-sensitive color-changing powder at 25 ℃, 3 parts of reversible temperature-sensitive color-changing powder at 30 ℃, 2 parts of polydimethylsiloxane, 0.1 part of coupling agent, 1.3 parts of lubricant, 8 parts of plasticizer and 6 parts of flame retardant. The preparation method of the nano white carbon black composite diatomite comprises the following steps:
(1) uniformly dispersing the nano white carbon black into an ethanol solution to obtain a nano white carbon black dispersion liquid;
(2) adding a silane coupling agent into the nano white carbon black dispersion liquid, and stirring at the rotating speed of 500r/min for 40min to obtain a modified dispersion liquid;
(3) uniformly dispersing diatomite into a sodium maleate solution to obtain a diatomite dispersion solution, then mixing the diatomite dispersion solution and a modified dispersion solution, adding the mixture into a vacuum impregnation reaction kettle, adding magnesium hydroxycarbonate, uniformly stirring at a high speed, then carrying out vacuum impregnation treatment for 2 hours, and then discharging to obtain a mixture;
(3) and carrying out suction filtration, washing and drying on the mixture to obtain the nano white carbon black composite diatomite.
The mixing mass ratio of the nano white carbon black to the ethanol solution is 30 g: 500 mL;
the mass fraction of the ethanol solution is 35 percent;
the mixing mass ratio of the nano white carbon black to the silane coupling agent is 12: 1.
the mixing mass ratio of the diatomite to the sodium maleate solution is 450 g: 500 mL;
the mass fraction of the sodium maleate solution is 3.8 percent;
the mixing mass ratio of the nano white carbon black dispersion liquid to the modified dispersion liquid to the hydroxyl magnesium carbonate is 1: 5: 0.2;
the vacuum impregnation temperature is 80 ℃ and the vacuum degree is 0.01 MPa. The antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite. The reversible thermochromic powder changes color into yellow at 20 ℃; the reversible temperature-sensitive color-changing powder changes into red at 25 ℃ and changes into blue at 30 ℃. The coupling agent is titanate coupling agent; the lubricant is ethylene bis stearamide. The plasticizer is triethyl phthalate; the flame retardant is magnesium hydroxide.
Example 2
A brilliant color-changing sunshade net is prepared from the following components in parts by weight: 125 parts of high-density polyethylene, 8 parts of glass fiber, 5 parts of antioxidant, 35 parts of nano white carbon black composite diatomite, 10 parts of PET, 5 parts of reversible temperature-sensitive color-changing powder at 20 ℃, 5 parts of reversible temperature-sensitive color-changing powder at 25 ℃, 5 parts of reversible temperature-sensitive color-changing powder at 30 ℃, 6 parts of polydimethylsiloxane, 0.4 part of coupling agent, 1.6 parts of lubricant, 12.5 parts of plasticizer and 10 parts of flame retardant. The preparation method of the nano white carbon black composite diatomite comprises the following steps:
(1) uniformly dispersing the nano white carbon black into an ethanol solution to obtain a nano white carbon black dispersion liquid;
(2) adding a silane coupling agent into the nano white carbon black dispersion liquid, and stirring at the rotating speed of 500r/min for 40min to obtain a modified dispersion liquid;
(3) uniformly dispersing diatomite into a sodium maleate solution to obtain a diatomite dispersion solution, then mixing the diatomite dispersion solution and a modified dispersion solution, adding the mixture into a vacuum impregnation reaction kettle, adding magnesium hydroxycarbonate, uniformly stirring at a high speed, then carrying out vacuum impregnation treatment for 2 hours, and then discharging to obtain a mixture;
(3) and carrying out suction filtration, washing and drying on the mixture to obtain the nano white carbon black composite diatomite.
The mixing mass ratio of the nano white carbon black to the ethanol solution is 30 g: 500 mL;
the mass fraction of the ethanol solution is 35 percent;
the mixing mass ratio of the nano white carbon black to the silane coupling agent is 12: 1.
the mixing mass ratio of the diatomite to the sodium maleate solution is 450 g: 500 mL;
the mass fraction of the sodium maleate solution is 3.8 percent;
the mixing mass ratio of the nano white carbon black dispersion liquid to the modified dispersion liquid to the hydroxyl magnesium carbonate is 1: 5: 0.2;
the vacuum impregnation temperature is 80 ℃ and the vacuum degree is 0.01 MPa. The antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite. The reversible thermochromic powder changes color into yellow at 20 ℃; the reversible temperature-sensitive color-changing powder changes into red at 25 ℃ and changes into blue at 30 ℃. The coupling agent is titanate coupling agent; the lubricant is ethylene bis stearamide. The plasticizer is triethyl phthalate; the flame retardant is magnesium hydroxide.
Example 3
A brilliant color-changing sunshade net is prepared from the following components in parts by weight: high-density polyethylene 116, glass fiber 5, antioxidant 3, nano white carbon black composite diatomite 28, PET9, reversible temperature-sensitive color-changing powder at 20 ℃ 3.5, reversible temperature-sensitive color-changing powder at 25 ℃ 3.5, reversible temperature-sensitive color-changing powder at 30 ℃ 3.5, polydimethylsiloxane 4, coupling agent 0.3, lubricant 1.4, plasticizer 10 and flame retardant 8. The preparation method of the nano white carbon black composite diatomite comprises the following steps:
(1) uniformly dispersing the nano white carbon black into an ethanol solution to obtain a nano white carbon black dispersion liquid;
(2) adding a silane coupling agent into the nano white carbon black dispersion liquid, and stirring at the rotating speed of 500r/min for 40min to obtain a modified dispersion liquid;
(3) uniformly dispersing diatomite into a sodium maleate solution to obtain a diatomite dispersion solution, then mixing the diatomite dispersion solution and a modified dispersion solution, adding the mixture into a vacuum impregnation reaction kettle, adding magnesium hydroxycarbonate, uniformly stirring at a high speed, then carrying out vacuum impregnation treatment for 2 hours, and then discharging to obtain a mixture;
(3) and carrying out suction filtration, washing and drying on the mixture to obtain the nano white carbon black composite diatomite.
The mixing mass ratio of the nano white carbon black to the ethanol solution is 30 g: 500 mL;
the mass fraction of the ethanol solution is 35 percent;
the mixing mass ratio of the nano white carbon black to the silane coupling agent is 12: 1.
the mixing mass ratio of the diatomite to the sodium maleate solution is 450 g: 500 mL;
the mass fraction of the sodium maleate solution is 3.8 percent;
the mixing mass ratio of the nano white carbon black dispersion liquid to the modified dispersion liquid to the hydroxyl magnesium carbonate is 1: 5: 0.2;
the vacuum impregnation temperature is 80 ℃ and the vacuum degree is 0.01 MPa. The antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite. The reversible thermochromic powder changes color into yellow at 20 ℃; the reversible temperature-sensitive color-changing powder changes into red at 25 ℃ and changes into blue at 30 ℃. The coupling agent is titanate coupling agent; the lubricant is ethylene bis stearamide. The plasticizer is triethyl phthalate; the flame retardant is magnesium hydroxide.
Example 4
A brilliant color-changing sunshade net is prepared from the following components in parts by weight: 125 parts of high-density polyethylene, 2 parts of glass fiber, 5 parts of antioxidant, 35 parts of nano white carbon black composite diatomite, 10 parts of PET, 3 parts of reversible temperature-sensitive color-changing powder at 20 ℃, 3 parts of reversible temperature-sensitive color-changing powder at 25 ℃, 3 parts of reversible temperature-sensitive color-changing powder at 30 ℃, 5 parts of polydimethylsiloxane, 0.3 part of coupling agent, 1.6 parts of lubricant, 8 parts of plasticizer and 9 parts of flame retardant. The preparation method of the nano white carbon black composite diatomite comprises the following steps:
(1) uniformly dispersing the nano white carbon black into an ethanol solution to obtain a nano white carbon black dispersion liquid;
(2) adding a silane coupling agent into the nano white carbon black dispersion liquid, and stirring at the rotating speed of 500r/min for 40min to obtain a modified dispersion liquid;
(3) uniformly dispersing diatomite into a sodium maleate solution to obtain a diatomite dispersion solution, then mixing the diatomite dispersion solution and a modified dispersion solution, adding the mixture into a vacuum impregnation reaction kettle, adding magnesium hydroxycarbonate, uniformly stirring at a high speed, then carrying out vacuum impregnation treatment for 2 hours, and then discharging to obtain a mixture;
(3) and carrying out suction filtration, washing and drying on the mixture to obtain the nano white carbon black composite diatomite.
The mixing mass ratio of the nano white carbon black to the ethanol solution is 30 g: 500 mL;
the mass fraction of the ethanol solution is 35 percent;
the mixing mass ratio of the nano white carbon black to the silane coupling agent is 12: 1.
the mixing mass ratio of the diatomite to the sodium maleate solution is 450 g: 500 mL;
the mass fraction of the sodium maleate solution is 3.8 percent;
the mixing mass ratio of the nano white carbon black dispersion liquid to the modified dispersion liquid to the hydroxyl magnesium carbonate is 1: 5: 0.2;
the vacuum impregnation temperature is 80 ℃ and the vacuum degree is 0.01 MPa. The antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite. The reversible thermochromic powder changes color into yellow at 20 ℃; the reversible temperature-sensitive color-changing powder changes into red at 25 ℃ and changes into blue at 30 ℃. The coupling agent is titanate coupling agent; the lubricant is ethylene bis stearamide. The plasticizer is triethyl phthalate; the flame retardant is magnesium hydroxide.
Example 5
A brilliant color-changing sunshade net is prepared from the following components in parts by weight: high-density polyethylene 116, glass fiber 5, antioxidant 3, nano white carbon black composite diatomite 24, PET8, reversible temperature-sensitive color-changing powder at 20 ℃, reversible temperature-sensitive color-changing powder at 25 ℃, reversible temperature-sensitive color-changing powder at 30 ℃, polydimethylsiloxane 6, coupling agent 0.1, lubricant 1.6, plasticizer 10 and flame retardant 8. The preparation method of the nano white carbon black composite diatomite comprises the following steps:
(1) uniformly dispersing the nano white carbon black into an ethanol solution to obtain a nano white carbon black dispersion liquid;
(2) adding a silane coupling agent into the nano white carbon black dispersion liquid, and stirring at the rotating speed of 500r/min for 40min to obtain a modified dispersion liquid;
(3) uniformly dispersing diatomite into a sodium maleate solution to obtain a diatomite dispersion solution, then mixing the diatomite dispersion solution and a modified dispersion solution, adding the mixture into a vacuum impregnation reaction kettle, adding magnesium hydroxycarbonate, uniformly stirring at a high speed, then carrying out vacuum impregnation treatment for 2 hours, and then discharging to obtain a mixture;
(3) and carrying out suction filtration, washing and drying on the mixture to obtain the nano white carbon black composite diatomite.
The mixing mass ratio of the nano white carbon black to the ethanol solution is 30 g: 500 mL;
the mass fraction of the ethanol solution is 35 percent;
the mixing mass ratio of the nano white carbon black to the silane coupling agent is 12: 1.
the mixing mass ratio of the diatomite to the sodium maleate solution is 450 g: 500 mL;
the mass fraction of the sodium maleate solution is 3.8 percent;
the mixing mass ratio of the nano white carbon black dispersion liquid to the modified dispersion liquid to the hydroxyl magnesium carbonate is 1: 5: 0.2;
the vacuum impregnation temperature is 80 ℃ and the vacuum degree is 0.01 MPa. The antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite. The reversible thermochromic powder changes color into yellow at 20 ℃; the reversible temperature-sensitive color-changing powder changes into red at 25 ℃ and changes into blue at 30 ℃. The coupling agent is titanate coupling agent; the lubricant is ethylene bis stearamide. The plasticizer is triethyl phthalate; the flame retardant is magnesium hydroxide.
Example 6
A brilliant color-changing sunshade net is prepared from the following components in parts by weight: the high-density polyethylene coating comprises high-density polyethylene 113, glass fiber 5, antioxidant 2, nano white carbon black composite diatomite 24, PET9, reversible temperature-sensitive color-changing powder at 20 ℃, reversible temperature-sensitive color-changing powder at 25 ℃, reversible temperature-sensitive color-changing powder at 30 ℃, polydimethylsiloxane 5, coupling agent 0.3, lubricant 1.2, plasticizer 12.5 and flame retardant 10. The preparation method of the nano white carbon black composite diatomite comprises the following steps:
(1) uniformly dispersing the nano white carbon black into an ethanol solution to obtain a nano white carbon black dispersion liquid;
(2) adding a silane coupling agent into the nano white carbon black dispersion liquid, and stirring at the rotating speed of 500r/min for 40min to obtain a modified dispersion liquid;
(3) uniformly dispersing diatomite into a sodium maleate solution to obtain a diatomite dispersion solution, then mixing the diatomite dispersion solution and a modified dispersion solution, adding the mixture into a vacuum impregnation reaction kettle, adding magnesium hydroxycarbonate, uniformly stirring at a high speed, then carrying out vacuum impregnation treatment for 2 hours, and then discharging to obtain a mixture;
(3) and carrying out suction filtration, washing and drying on the mixture to obtain the nano white carbon black composite diatomite.
The mixing mass ratio of the nano white carbon black to the ethanol solution is 30 g: 500 mL;
the mass fraction of the ethanol solution is 35 percent;
the mixing mass ratio of the nano white carbon black to the silane coupling agent is 12: 1.
the mixing mass ratio of the diatomite to the sodium maleate solution is 450 g: 500 mL;
the mass fraction of the sodium maleate solution is 3.8 percent;
the mixing mass ratio of the nano white carbon black dispersion liquid to the modified dispersion liquid to the hydroxyl magnesium carbonate is 1: 5: 0.2;
the vacuum impregnation temperature is 80 ℃ and the vacuum degree is 0.01 MPa. The antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite. The reversible thermochromic powder changes color into yellow at 20 ℃; the reversible temperature-sensitive color-changing powder changes into red at 25 ℃ and changes into blue at 30 ℃. The coupling agent is titanate coupling agent; the lubricant is ethylene bis stearamide. The plasticizer is triethyl phthalate; the flame retardant is magnesium hydroxide.
Test of
The monofilaments of the examples were tested for tensile properties:
the ultraviolet aging test is carried out by referring to GB/T14522-2008, the used instrument is an ultraviolet aging test box, the wavelength of an ultraviolet lamp is 340nm, the power is 7.2kW, the temperature in the aging box is controlled at 45 ℃, the ultraviolet irradiation is continuously carried out, water is sprayed for 10min every 12h, an aging period is every 4 days, and the total aging period is 60 days:
and (3) detecting the tensile strength:
TABLE 1
Comparative example 1: the difference from the example 1 is that the nano white carbon black composite diatomite is not added.
As can be seen from Table 1, the monofilament prepared by the invention has excellent tensile property, greatly improves the mechanical property of the sunshade net through the synergistic effect of the components, also obviously improves the ultraviolet aging resistance of the sunshade net, and can greatly prolong the service life of the sunshade net used outdoors.
Detecting a static contact angle;
TABLE 2
| Static contact Angle ° | |
| Example 1 | 112.8 |
| Example 2 | 113.5 |
| Example 3 | 112.5 |
| Example 4 | 112.9 |
| Example 5 | 113.2 |
| Example 6 | 113.7 |
| Comparative example 2 | 90.3 |
Comparative example 2: the difference from example 1 is that no polydimethylsiloxane was added.
As can be seen from the table 2, when the polydimethylsiloxane is not added, the static contact angle of the prepared sunshade net is obviously reduced, which shows that the hydrophobicity of the prepared sunshade net is obviously reduced, and the water absorption is improved.
And (3) detecting the light reflection rate:
TABLE 3
Comparative example 3: the difference from the example 1 is that the nano white carbon black composite diatomite is replaced by the untreated diatomite; as can be seen from Table 3, the sunshade net prepared by the invention has good light reflection rate and good light reflection effect, and the light reflection rate of the sunshade net is greatly improved, so that the sunshade effect of the sunshade net is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited to the illustrated embodiments, and all the modifications and equivalents of the embodiments may be made without departing from the spirit of the present invention.
Claims (9)
1. A brilliant sunshade screen that discolours, characterized by, by weight are made of the following components: 110-125 parts of high-density polyethylene, 2-8 parts of glass fiber, 1-5 parts of antioxidant, 21-35 parts of nano white carbon black composite diatomite, 8-10 parts of PET, 3-5 parts of reversible temperature-sensitive color-changing powder at 20 ℃, 3-5 parts of reversible temperature-sensitive color-changing powder at 25 ℃, 3-5 parts of reversible temperature-sensitive color-changing powder at 30 ℃, 2-6 parts of polydimethylsiloxane, 0.1-0.4 part of coupling agent, 1.3-1.6 parts of lubricant, 8-12.5 parts of plasticizer and 6-10 parts of flame retardant.
2. A brilliant color-changing sunshade net according to claim 1, characterized in that: the preparation method of the nano white carbon black composite diatomite comprises the following steps:
(1) uniformly dispersing the nano white carbon black into an ethanol solution to obtain a nano white carbon black dispersion liquid;
(2) adding a silane coupling agent into the nano white carbon black dispersion liquid, and stirring at the rotating speed of 500r/min for 40min to obtain a modified dispersion liquid;
(3) uniformly dispersing diatomite into a sodium maleate solution to obtain a diatomite dispersion solution, then mixing the diatomite dispersion solution and a modified dispersion solution, adding the mixture into a vacuum impregnation reaction kettle, adding magnesium hydroxycarbonate, uniformly stirring at a high speed, then carrying out vacuum impregnation treatment for 2 hours, and then discharging to obtain a mixture;
(3) and carrying out suction filtration, washing and drying on the mixture to obtain the nano white carbon black composite diatomite.
3. A brilliant color-changing sunshade net according to claim 2, characterized in that: the mixing mass ratio of the nano white carbon black to the ethanol solution is 30 g: 500 mL;
the mass fraction of the ethanol solution is 35 percent;
the mixing mass ratio of the nano white carbon black to the silane coupling agent is 12: 1.
4. a brilliant color-changing sunshade net according to claim 2, characterized in that: the mixing mass ratio of the diatomite to the sodium maleate solution is 450 g: 500 mL;
the mass fraction of the sodium maleate solution is 3.8 percent;
the mixing mass ratio of the nano white carbon black dispersion liquid to the modified dispersion liquid to the hydroxyl magnesium carbonate is 1: 5: 0.2;
the vacuum impregnation temperature is 80 ℃ and the vacuum degree is 0.01 MPa.
5. A brilliant color-changing sunshade net according to claim 1, characterized in that: the antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite.
6. A brilliant color-changing sunshade net according to claim 1, characterized in that: the reversible thermochromic powder changes color into yellow at the temperature of 20 ℃; the reversible temperature-sensitive color-changing powder changes into red at 25 ℃ and changes into blue at 30 ℃.
7. A brilliant color-changing sunshade net according to claim 1, characterized in that: the coupling agent is a titanate coupling agent;
the lubricant is ethylene bis stearamide.
8. A brilliant color-changing sunshade net according to claim 1, characterized in that: the plasticizer is triethyl phthalate;
the flame retardant is magnesium hydroxide.
9. The method for preparing a brilliant color-changing sunshade net according to claim 1, wherein: the method comprises the following steps:
(1) weighing high-density polyethylene, glass fiber, an antioxidant, nano white carbon black composite diatomite, PET, 20 ℃ reversible temperature-sensitive color-changing powder, 25 ℃ reversible temperature-sensitive color-changing powder, 30 ℃ reversible temperature-sensitive color-changing powder, polydimethylsiloxane, a coupling agent, a lubricant, a plasticizer and a flame retardant in parts by weight, and then adding the mixture into a stirrer to stir uniformly at a high speed to obtain a mixture;
(2) adding the mixture into a double-screw extruder for melt extrusion, and performing water-cooling wire drawing to obtain monofilaments;
(3) and dividing the dipped monofilaments into warp and weft raw materials, warping the warp yarns, and weaving the warp yarns and the weft yarns together after warp threading to obtain the sunshade net.
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