CN113583452B - Anti-slip silica gel applied to keyboard keys - Google Patents
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- CN113583452B CN113583452B CN202110918301.2A CN202110918301A CN113583452B CN 113583452 B CN113583452 B CN 113583452B CN 202110918301 A CN202110918301 A CN 202110918301A CN 113583452 B CN113583452 B CN 113583452B
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- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/12—Adsorbed ingredients, e.g. ingredients on carriers
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- 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
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- 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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- 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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention provides anti-slip silica gel applied to keyboard keys, which relates to the technical field of silica gel keyboards and is obtained by dispersing nano oxide encapsulated by dendritic molecules into silica gel sol and then performing ultrasonic treatment and solidification, wherein the nano oxide encapsulated by the dendritic molecules takes the dendritic molecules as a surfactant to adsorb and grow on the surface of the nano oxide and encapsulate the nano oxide, and the preparation method of the anti-slip silica gel applied to the keyboard keys comprises the following steps: (1) preparing a dendrimer encapsulated nano oxide; (2) the invention relates to the synthesis of antiskid silica gel by polyamide-amine and SiO 2 The composition of the grid can contain rich nano particles, the nano particles are uniformly dispersed, the surface roughness is increased under the condition of not generating macroscopic roughness, the touch feeling of the surface of the keyboard key made of the anti-skid silica gel is smooth, the maintenance and the cleaning are convenient, and the mechanical properties of the silica gel are also synergistically improved by the nano particles and the polyamide-amine.
Description
Technical Field
The invention relates to the technical field of keyboard antiskid, in particular to antiskid silica gel applied to keyboard keys.
Background
The silica gel keyboard can be curled at will, is convenient to carry, saves space, has light weight less than 330 g and small volume. The silica gel keyboard has good resilience, and silent tapping is realized. But the silica gel keyboard has soft hardness, soft touch and insufficient anti-skid performance.
The traditional way for enhancing the anti-skid performance is to add macro roughness on the surface of the keyboard, such as frosting treatment, adding macro high surface texture and anti-skid coating, and these ways can result in poor touch experience of the keyboard keys, and the large surface gaps of the keyboard keys are easy to store dirty dirt during long-term use, so that the silica gel keyboard is difficult to clean and maintain.
The small particle size of the nanoparticles can construct microscopic micrometer-level surface textures, and the nanoparticles have poor dispersibility in silica gel or polymers, and particularly when abundant nanoparticles are contained, the abundant nanoparticles need to be uniformly distributed in the silica gel in order to obtain the abundant micrometer-level surface texture structure, so that the development of the anti-slip silica gel applied to the keys of the keyboard is urgently needed.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide anti-slip silica gel applied to keyboard keys, and solves the problem that a large number of nano particles in an anti-slip silica gel keyboard are difficult to uniformly disperse.
(II) technical scheme
In order to solve the technical problems, the invention provides the following technical scheme:
the anti-slip silica gel applied to the keyboard keys is obtained by dispersing nano oxide encapsulated by dendritic molecules into silica gel sol and then performing ultrasonic treatment and curing, wherein the nano oxide encapsulated by the dendritic molecules is obtained by taking the dendritic molecules as a surfactant to adsorb and grow on the surface of the nano oxide and encapsulating the nano oxide.
Preferably, the dendrimer is a polyamidoamine, the polyamidoamine being prepared from the monomers ethylenediamine and methyl acrylate.
Preferably, the nano oxide is any one of nano zinc oxide, nano aluminum oxide and nano titanium oxide.
The preparation method of the anti-skid silica gel applied to the keyboard keys comprises the following specific steps:
(1) adding ethylenediamine and methanol into a reactor, stirring to uniformly mix the ethylenediamine and the methanol to obtain a mixed solution A, adding a nano oxide into the methanol, performing ultrasonic dispersion to uniformly obtain a mixed solution B, adding the mixed solution A into the mixed solution B at 25 ℃ under ultrasonic, performing ultrasonic dispersion to uniformly disperse the mixed solution A, dropwise adding a methyl acrylate solution for 2 hours, filtering after the reaction is finished, washing with ethanol, and drying to obtain a dendrimer encapsulated nano oxide;
(2) adding (3-chloropropyl) triethoxysilane and ethyl orthosilicate into ethanol, adding dendrimer encapsulated nano oxide, performing ultrasonic treatment for 30min, maintaining at 60 ℃ for 1h by using a rotary evaporator, pouring the product into a mold, and curing to obtain the anti-skid silica gel.
Preferably, the reaction condition in the step (1) is that after methyl acrylate is dripped, the reaction is continued for 24 hours under ultrasonic wave.
Preferably, the drying condition of the step (1) is drying in a vacuum oven at 60-70 ℃ for 16-24 h.
Preferably, the mass ratio of the ethylenediamine to the methanol to the methyl acrylate to the nano oxide in the step (1) is 12-15:30-35:78-80: 8-10.
Preferably, the mass ratio of the (3-chloropropyl) triethoxysilane, the ethyl orthosilicate, the ethanol and the dendrimer encapsulated nano oxide in the step (2) is 6.5-7.5:4-5:2.8-3.3: 3.5-5.
Preferably, the curing condition in the step (2) is curing at 60 ℃ for 24-30 h.
The beneficial effects of the invention are:
(1) the anti-slip silica gel applied to the keyboard key is characterized in that nano oxide particles are mixed in ethylenediamine and methanol, methyl acrylate is dropwise added under ultrasound so that ethylenediamine and methyl acrylate are polymerized into dendritic polyamide-amine and are terminated by amino groups, the nano oxide particles are dispersed in gaps among dendritic branches, metal ions of the nano oxide particles are coordinated with the amino groups on the dendritic polyamide-amine so that the nano oxide can be stably fixed in the dendritic branches, finally, the nano oxide encapsulated by dendritic molecules is mixed with ethyl orthosilicate and (3-chloropropyl) triethoxysilane, the ethyl orthosilicate is hydrolyzed into active monomers and is polymerized with (3-chloropropyl) triethoxysilane into sol, and the amino groups on the polyamide-amine on the nano oxide encapsulated by the dendritic molecules react with chlorine atoms in the sol, so that the polyamide-amine with the nano-oxide particles is uniformly dispersed in SiO 2 In the grid, polyamidoamine and SiO 2 The composition of the grid can contain abundant nano particles, and the micro roughness of the surface structure of the silica gel is improved.
(2) According to the anti-slip silica gel applied to the keyboard keys, the roughness of the surface can be increased under the condition that macroscopic roughness is not generated by compounding abundant nanoparticles in the silica gel, so that the touch feeling of the surface of the keyboard keys made of the anti-slip silica gel is smooth, the anti-slip silica gel is convenient to maintain and clean, a large amount of dirt hidden on the surface of the keyboard keys is avoided, and the mechanical property of the silica gel is also synergistically improved by compounding the polyamide-amine and the nanoparticles.
Detailed Description
The invention is further illustrated by the following examples, which are intended to illustrate, but not to limit the invention further. The technical means used in the following examples are conventional means well known to those skilled in the art, and all raw materials are general-purpose materials.
Example 1
A preparation method of anti-skid silica gel applied to keyboard keys comprises the following specific steps:
(1) adding 1.2g of ethylenediamine and 2g of methanol into a reactor, stirring to uniformly mix the ethylenediamine and the methanol to obtain a mixed solution A, adding 0.8g of nano zinc oxide into 1g of methanol, uniformly dispersing for 5min by using ultrasonic to obtain a mixed solution B, adding the mixed solution A into the mixed solution B at 25 ℃ under ultrasonic, uniformly dispersing for 10min by using ultrasonic, continuously reacting for 24h under ultrasonic after 7.8g of methyl acrylate is added in 2h, filtering after the reaction is finished, washing with ethanol, and drying for 24h in a vacuum oven at 60 ℃ to obtain dendrimer encapsulated nano zinc oxide;
(2) adding 6.5g of (3-chloropropyl) triethoxysilane and 4g of ethyl orthosilicate into 2.8g of ethanol, adding 3.5g of dendrimer encapsulated nano zinc oxide, carrying out ultrasonic treatment for 30min, keeping the temperature for 1h at 60 ℃ by using a rotary evaporator, pouring the product into a mold, and curing for 26h at 60 ℃ to obtain the anti-skid silica gel.
Example 2
A preparation method of anti-skid silica gel applied to keyboard keys comprises the following specific steps:
(1) adding 1.3g of ethylenediamine and 2.5g of methanol into a reactor, stirring to uniformly mix the ethylenediamine and the methanol to obtain a mixed solution A, adding 0.8g of nano titanium oxide into 1g of methanol, uniformly dispersing by ultrasonic for 5min to obtain a mixed solution B, adding the mixed solution A into the mixed solution B at 25 ℃ under ultrasonic, uniformly dispersing by ultrasonic for 10min, continuously reacting for 24h under ultrasonic after 7.8g of methyl acrylate is added in 2h, filtering after the reaction is finished, washing with ethanol, and drying in a vacuum oven at 62 ℃ for 22h to obtain dendrimer encapsulated nano titanium oxide;
(2) adding 6.8g of (3-chloropropyl) triethoxysilane and 4.2g of ethyl orthosilicate into 3g of ethanol, adding 4g of dendrimer encapsulated nano titanium oxide, carrying out ultrasonic treatment for 30min, keeping the temperature for 1h at 60 ℃ by using a rotary evaporator, pouring the product into a mold, and curing for 24h at 60 ℃ to obtain the anti-slip silica gel.
Example 3
A preparation method of anti-skid silica gel applied to keyboard keys comprises the following specific steps:
(1) adding 1.4g of ethylenediamine and 2g of methanol into a reactor, stirring to uniformly mix the ethylenediamine and the methanol to obtain a mixed solution A, adding 0.9g of nano-alumina into 1.2g of methanol, uniformly dispersing by ultrasonic for 5min to obtain a mixed solution B, adding the mixed solution A into the mixed solution B at 25 ℃ under ultrasonic, uniformly dispersing by ultrasonic for 10min, continuously reacting for 24h under ultrasonic after 7.9g of methyl acrylate is added in 2h, filtering after the reaction is finished, washing with ethanol, and drying in a 65 ℃ vacuum oven for 20h to obtain dendrimer encapsulated nano-alumina;
(2) adding 7g of (3-chloropropyl) triethoxysilane and 4.5g of ethyl orthosilicate into 3.3g of ethanol, adding 4.5g of dendrimer encapsulated nano-alumina, carrying out ultrasonic treatment for 30min, keeping the temperature for 1h at 60 ℃ by using a rotary evaporator, pouring the product into a mold, and curing for 28h at 60 ℃ to obtain the anti-skid silica gel.
Example 4
A preparation method of anti-skid silica gel applied to keyboard keys comprises the following specific steps:
(1) adding 1.5g of ethylenediamine and 2.2g of methanol into a reactor, stirring to uniformly mix the ethylenediamine and the methanol to obtain a mixed solution A, adding 1g of nano zinc oxide into 1.2g of methanol, performing ultrasonic dispersion for 5min to uniformly obtain a mixed solution B, adding the mixed solution A into the mixed solution B at 25 ℃ under ultrasonic sound, performing ultrasonic dispersion for 10min to uniformly, dripping 8g of methyl acrylate within 2h, continuing to perform reaction for 24h under ultrasonic sound, filtering after the reaction is finished, washing with ethanol, and drying in a vacuum oven at 70 ℃ for 16h to obtain a dendrimer encapsulated nano oxide;
(2) adding 7.5g of (3-chloropropyl) triethoxysilane and 5g of ethyl orthosilicate into 3.3g of ethanol, adding 5g of dendrimer encapsulated nano-oxide, carrying out ultrasonic treatment for 30min, keeping the temperature for 1h at 60 ℃ by using a rotary evaporation instrument, pouring the product into a mold, and curing for 30h at 60 ℃ to obtain the anti-skidding silica gel.
Comparative example 1
A preparation method of anti-skid silica gel comprises the following specific steps:
(1) adding 1g of nano zinc oxide into 1.2g of methanol, uniformly dispersing for 5min by ultrasonic to obtain a mixed solution B, adding 7.5g of (3-chloropropyl) triethoxysilane and 5g of ethyl orthosilicate into 3.3g of ethanol, adding the mixed solution B, carrying out ultrasonic treatment for 30min, keeping the mixture at 60 ℃ for 1h by using a rotary evaporator, pouring the product into a mold, and curing at 60 ℃ for 30h to obtain the anti-skid silica gel;
comparative example 2
A preparation method of anti-slip silica gel applied to keys comprises the following specific steps:
(1) adding 1.5g of ethylenediamine and 2.2g of methanol into a reactor, stirring to uniformly mix the ethylenediamine and the methanol to obtain a mixed solution A, adding 1g of nano-alumina into 1.2g of methanol, performing ultrasonic dispersion for 5min to uniformly obtain a mixed solution B, adding the mixed solution A into the mixed solution B at 25 ℃ under ultrasonic sound, performing ultrasonic dispersion for 10min to uniformly, dripping 8g of methyl acrylate within 2h, continuing to perform reaction for 24h under ultrasonic sound, filtering after the reaction is finished, washing with ethanol, and drying in a vacuum oven at 70 ℃ for 16h to obtain dendrimer encapsulated nano-alumina;
(2) adding 3.5g of trimethylethoxysilane and 5g of ethyl orthosilicate into 3.3g of ethanol, adding 5g of dendrimer encapsulated nano-alumina, carrying out ultrasonic treatment for 30min, keeping the mixture at 60 ℃ for 1h by using a rotary evaporator, pouring the product into a mold, and curing the product at 60 ℃ for 30h to obtain the anti-skid silica gel.
1) Swing arm test method the anti-slip silicone prepared in examples 1-4 and comparative examples 1-2 were cast into 2 x 0.5cm rectangular bars, the surface of each bar was wetted with 5ml of drinking water before releasing the swing arm, the pendulum arm length was 410mm, the pendulum weight was 1.5kg, the test was performed at 0 ° or 180 ° starting point for each bar, 5 times for each sample, and the test results are shown in table 1.
Table 1:
and (4) analyzing results: as can be seen from Table 1, the pendulum test values of the anti-slip silica gels prepared in examples 1 to 4 were all 16 or more, while those of the anti-slip silica gels prepared in comparative examples 1 to 2 were only 10.448 and 12.368, indicating that the anti-slip silica gels prepared according to the present invention have excellent anti-slip properties.
2) The anti-slip silica gels prepared in examples 1 to 4 and comparative examples 1 to 2 were cast into 2 × 0.5cm rectangular bars, and the average roughness of each sample was measured according to DIN EN ISO 3247 standard using the surface roughness evaluated by the portable roughness test, and is shown in table 2.
Table 2:
and (4) analyzing results: as can be seen from Table 2, the average roughness of the anti-slip silica gels prepared in examples 1 to 4 was within 1.40 to 1.50 μm, while the average roughness of the anti-slip silica gels prepared in comparative examples 1 to 2 was 22.6 μm and 18.9 μm, and the nanoparticles in the anti-slip silica gel prepared according to the present invention were uniformly dispersed to have a surface texture of single digit micrometer level.
3) And (3) testing the mechanical properties of the silica gel keyboard keys: the anti-slip silica gels prepared in examples 1 to 4 and comparative examples 1 to 2 were cast to the specifications of the samples in table 3, and the tensile strength, elongation and tear strength were measured according to the standards, and the test results are shown in table 4.
Table 4:
and (4) analyzing results: as can be seen from Table 4, the tensile strength, the elongation at break and the tear strength of the anti-slip silica gel prepared in the examples 1 to 4 are all superior to those of the anti-slip silica gel prepared in the comparative examples 1 and 2, and the elongation at break of the examples 1 to 4 can reach 391.3% at most, the tensile strength can reach 14.5MPa at most, and the tear strength can reach 24.7kN/m at most, which shows that the anti-slip silica gel prepared by the invention can also improve the mechanical properties of the silica gel synergistically through the compounding of the polyamide-amine and the nanoparticles.
Finally, it should be noted that: the above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention; it will be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted; all such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.
Claims (6)
1. A preparation method of anti-skid silica gel applied to keyboard keys is characterized by comprising the following specific steps:
(1) adding ethylenediamine and methanol into a reactor, stirring to uniformly mix the ethylenediamine and the methanol to obtain a mixed solution A, adding a nano oxide into the methanol, performing ultrasonic dispersion to uniformly obtain a mixed solution B, adding the mixed solution A into the mixed solution B at 25 ℃ under ultrasonic, performing ultrasonic dispersion to uniformly disperse, dropwise adding a methyl acrylate solution, filtering after the reaction is finished, washing with ethanol, and drying to obtain a dendrimer encapsulated nano oxide; wherein the mass ratio of the ethylenediamine to the methanol to the methyl acrylate to the nano oxide is 12-15:30-35:78-80: 8-10;
(2) adding (3-chloropropyl) triethoxysilane and ethyl orthosilicate into ethanol, adding dendrimer encapsulated nano oxide, performing ultrasonic treatment for 30min, maintaining at 60 ℃ for 1h by using a rotary evaporator, pouring the product into a mold, and curing to obtain the anti-skid silica gel; wherein the mass ratio of the (3-chloropropyl) triethoxysilane to the ethyl orthosilicate to the ethanol to the dendrimer encapsulated nano oxide is 6.5-7.5:4-5:2.8-3.3: 3.5-5.
2. The preparation method of the anti-slip silica gel applied to the keyboard keys as claimed in claim 1, wherein the nano oxide is any one of nano zinc oxide, nano aluminum oxide and nano titanium oxide.
3. The preparation method of the anti-slip silica gel applied to the keyboard keys as claimed in claim 1, wherein the reaction condition in the step (1) is that after methyl acrylate is dripped, the reaction is continued for 24 hours under ultrasonic wave.
4. The preparation method of the anti-slip silica gel applied to the keys of the keyboard according to claim 1, wherein the drying condition of the step (1) is drying in a vacuum oven at 60-70 ℃ for 16-24 h.
5. The silica gel for preventing slipping of a keyboard key according to claim 1, wherein the curing condition in step (2) is curing at 60 ℃ for 24-30 h.
6. An anti-slip silica gel for keyboard keys prepared by the preparation method of claim 1.
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