CN115403930B - Public transport vehicle hand-pulled ring silica gel antibacterial sleeve and preparation method thereof - Google Patents
Public transport vehicle hand-pulled ring silica gel antibacterial sleeve and preparation method thereof Download PDFInfo
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- 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
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- C08K9/02—Ingredients treated with inorganic substances
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- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5425—Silicon-containing compounds containing oxygen containing at least one C=C bond
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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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
- C08K3/02—Elements
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- C08K2003/0806—Silver
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
The application relates to the field of silica gel products, and specifically discloses a public transport vehicle hand ring silica gel antibacterial sleeve and a preparation method thereof, wherein the preparation method comprises the following steps: adding silicon carbide particles into an organic solvent for dispersion, adding silver nitrate, stirring uniformly, adding a reducing agent, stirring uniformly, dipping, adding a dispersing agent, and stirring uniformly; filtering the uniformly stirred mixture, drying filter residues, and obtaining silicon carbide-nano silver hybrid particles; mixing silicon carbide-nano silver hybrid particles, a coupling agent and polysiloxane to obtain a silicon rubber matrix, cooling the silicon rubber matrix to room temperature, adding a curing agent, and kneading to obtain a silica gel antibacterial sleeve; the nano silver particles coated on the surface of the silicon carbide particles improve the antibacterial rate of the silica gel antibacterial sleeve after being soaked in artificial sweat; the silicon carbide-nano silver hybrid particles improve the compatibility with polysiloxane through a coupling agent, and the prepared silica gel antibacterial sleeve has good wear resistance and corrosion resistance.
Description
Technical Field
The application relates to the field of silica gel products, in particular to a silica gel antibacterial sleeve of a hand ring of a public transport vehicle and a preparation method thereof.
Background
In daily life, public transportation means have advantages such as economy, low carbon and facility, become the mode of the preferred trip of many people, public transportation means such as current public transit and subway all are provided with the hand pull ring, and the hand pull ring passes through the pull belt to be fixed at the interior top in bus or subway carriage, when the passenger held the hand pull ring, has solved the safety problem of passenger in the carriage to a certain extent.
Because the hand pull ring is held by the hands of different passengers every day, the surface of the hand pull ring is the place where bacteria and fungi are most bred in public transportation means, and therefore the outer surface of the hand pull ring is provided with an antibacterial silica gel sleeve, and an antibacterial agent is added into the antibacterial silica gel sleeve, so that the antibacterial agent not only can inhibit the growth of microorganisms, but also has the capability of killing the microorganisms. In the related art, an antibacterial agent is added into a silica gel system to improve the antibacterial property of the silica gel, for example, silver ions and compounds thereof are added into the silica gel system, and the silver ions cause the structural denaturation of DNA molecules of microorganisms such as bacteria and the like, so that the bacteria are deactivated, and the antibacterial effect is achieved.
In view of the above-mentioned related art, the inventors have found that, since factors such as friction and hand perspiration affect the silicone sleeve during the process of holding the silicone sleeve by a passenger, the antimicrobial durability of the silicone sleeve is often found to be deteriorated during the repeated use, and improvement is required.
Disclosure of Invention
In order to improve the antibacterial durability of the silica gel antibacterial sleeve, the application provides a public transport vehicle hand-pulled ring silica gel antibacterial sleeve and a preparation method thereof.
In a first aspect, the present application provides an antimicrobial sleeve of a public transportation vehicle pull ring silica gel, employing the following scheme:
the utility model provides a public transport means hand ring silica gel antibacterial sleeve, includes the raw materials of following parts by weight and makes:
700-912 parts of polysiloxane;
70-91 parts of silicon carbide-nano silver hybrid particles;
16-21 parts of a coupling agent;
11-16 parts of curing agent;
the preparation raw materials of the silicon carbide-nano silver hybrid particles comprise silicon carbide particles, silver nitrate, a reducing agent and a dispersing agent, wherein the weight ratio of the silicon carbide particles to the silver nitrate to the reducing agent to the dispersing agent is 10: (17-20): (5-8): (1-2).
By adopting the technical scheme, the silicon carbide-nano silver hybrid particles have good antibacterial effect, have the characteristics of large specific surface area, high hardness and corrosion resistance, are coated on the silicon carbide particles, and change the interface performance of the silicon carbide-nano silver hybrid particles through the coupling agent, so that the silicon carbide-nano silver particles are uniformly distributed in a silicon rubber matrix, the silicon carbide particles play a certain role in protecting the nano silver particles, the compatibility of the nano silver in the silicon rubber matrix is improved, the antibacterial effect is realized, the antibacterial time is prolonged, and the prepared antibacterial silica gel sleeve has good antibacterial property, corrosion resistance and wear resistance.
Preferably, the silicon carbide particles are pretreated silicon carbide particles, and the pretreatment steps of the pretreated silicon carbide particles are as follows: adding the silicon carbide particles into a mixed solution of hydrofluoric acid and hydrochloric acid, carrying out acid washing for 8-10min, filtering, separating, washing with water, and drying to obtain pretreated silicon carbide particles, wherein the weight ratio of the silicon carbide particles to the hydrofluoric acid to the hydrochloric acid is 2: (2-3): (4-5).
Through adopting the above-mentioned technical scheme of this application, use hydrofluoric acid and hydrochloric acid mixed solution to the carborundum surface pickling, carry out the preliminary treatment, the pothole on carborundum surface after the preliminary treatment is convenient for nanometer silver particle etching and cladding in carborundum particle surface to improve the antibiotic durability of preparing the antibiotic cover of silica gel.
Preferably, the coupling agent is selected from one or more of KH550, KH560 and KH 570.
By adopting the technical scheme, the coupling agent has an organophilic group and an inorganic group in the molecular structure, the organophilic group of the coupling agent can react with the silicon rubber matrix, and the inorganic group can react with the silicon carbide particles, so that the interface performance between the silicon carbide and the polysiloxane is changed, the compatibility of the silicon carbide particles and the polysiloxane is improved, the silicon carbide particles are uniformly distributed in the silicon rubber matrix, and the reinforcing effect of the silicon carbide particles is improved.
Preferably, the curing agent is selected from one of diethylenetriamine and triethylenetetramine.
By adopting the technical scheme, the curing agent, the silicon rubber matrix and the silicon carbide undergo a crosslinking reaction, so that the curing effect of the modified silicon rubber is improved.
Preferably, the reducing agent is selected from one or more of sodium citrate, sodium borohydride and ferrous sulphate.
By adopting the technical scheme, the reducing agent reacts with silver nitrate with strong oxidability, and silver ions are reduced to obtain nano silver particles.
Preferably, the dispersing agent is selected from one or more of polydiallyl dimethyl ammonium chloride and polyaluminum chloride.
Through adopting the above-mentioned technical scheme of this application, the dispersant plays the effect that reduces carborundum granule and nano silver particle interface tension, effectively reduces the condition that mixed system combined each other and agglomerated sedimentation appears.
Preferably, the raw material of the silicon carbide-nano silver hybrid particles further comprises a protective agent, wherein the protective agent is one or more selected from polyvinyl alcohol, polyvinylpyrrolidone and polyethylene glycol.
Through adopting the above-mentioned technical scheme of this application, when the nanometer silver particle cladding after the reduction was at carborundum granule surface, the protection agent cladding forms the protection film at the surface, and polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol have good cohesiveness and moldability can improve the stability of nanometer silver particle cladding on carborundum surface.
Preferably, the dispersing agent is selected from polydiallyl dimethyl ammonium chloride and polyaluminium chloride, the protective agent is selected from polyvinyl alcohol, the polymerization degree of the polyvinyl alcohol is 2000, and the weight ratio of the silicon carbide particles, silver nitrate, polydiallyl dimethyl ammonium chloride, polyaluminium chloride and the polyvinyl alcohol is 100:200: (5-10): (5-10): (20-23).
By adopting the technical scheme, the prepared antibacterial silica gel sleeve has good antibacterial property and good corrosion resistance.
Preferably, the silicon carbide particles have a particle size of 1.5-2.5 μm.
By adopting the technical scheme, when the particle size of the silicon carbide is too small, the nano silver is not easy to coat on the surface of the silicon carbide, so that the antibacterial property of the silicon rubber matrix is not easy to improve, and when the particle size of the silicon carbide is too large, the rebound resilience of the silicon rubber matrix is easy to influence due to the large hardness of the silicon carbide particles; when the grain diameter of the silicon carbide is 1.5-2.5 mu m, the wear resistance and rebound resilience of the prepared antibacterial silica gel sleeve can be improved after the silicon carbide is mixed with polysiloxane.
In a second aspect, the present application provides a method for preparing an antimicrobial silicone sleeve for a hand ring of a public transportation vehicle, which adopts the following scheme: the preparation method of the silica gel antibacterial sleeve of the hand ring of the public transport vehicle comprises the following steps:
adding silicon carbide particles into an organic solvent for dispersion, then adding a silver nitrate solution, stirring uniformly, adding a reducing agent, stirring uniformly, dipping for 1-2h, adding a dispersing agent, and stirring uniformly;
filtering the uniformly stirred mixture, and drying filter residues to prepare silicon carbide-nano silver hybrid particles;
mixing silicon carbide-nano silver hybrid particles, a coupling agent and polysiloxane, mixing at 135-145 ℃ for 1-4 hours to obtain a silicon rubber matrix, cooling the silicon rubber matrix to room temperature, adding a curing agent, kneading, and performing mould pressing at 150-160 ℃ for 15-20 minutes under the pressure of 2-12MPa to obtain the silica gel antibacterial sleeve.
By adopting the technical scheme, the nano silver particles prepared by reduction of the silver nitrate are coated on the surfaces of the silicon carbide particles, so that the antibacterial durability of the silica gel antibacterial sleeve is improved; the polysiloxane has good flexibility, the silicon carbide-nano silver hybrid particles improve the compatibility with the polysiloxane through the coupling agent, and the silica gel antibacterial sleeve is obtained after the curing of the overcuring agent, so that the silica gel antibacterial sleeve has good wear resistance and corrosion resistance.
Detailed Description
The present application is described in further detail below with reference to examples.
Preparation example
Preparation example 1
Preparation of pretreated silicon carbide particles:
taking 2kg of silicon carbide particles, wherein the particle size of the silicon carbide particles is 1.5-2.5 mu m, taking 5L of hydrofluoric acid, the concentration of the hydrofluoric acid is 400g/L, taking 16L of hydrochloric acid and the concentration of the hydrochloric acid as a mixed solution of 250g/L, carrying out ultrasonic vibration at room temperature for 8min, and repeatedly flushing the silicon carbide particles with deionized water for 3 times after vibration, thereby obtaining the pretreated silicon carbide particles.
Preparation example 2
Taking 2kg of silicon carbide particles, wherein the particle size of the silicon carbide particles is 1.5-2.5 mu m, taking 7.5L of hydrofluoric acid, the concentration of the hydrofluoric acid is 400g/L, taking 20L of hydrochloric acid and the concentration of the hydrochloric acid as a mixed solution of 250g/L, carrying out ultrasonic vibration at room temperature for 10min, and repeatedly flushing the silicon carbide particles with deionized water for 4 times after vibration, thereby obtaining pretreated silicon carbide particles.
Examples
Example 1
Preparation of silicon carbide-nano silver hybrid particles:
s1, adding 1kg of silicon carbide particles into 5L of N, N-dimethylformamide solvent, continuously stirring at a rotating speed of 300r/min, wherein the particle size of the silicon carbide particles is 1.5-2.5 mu m, and uniformly stirring;
s2, adding 8.5L of silver nitrate solution with the mass concentration of 200g/L under stirring at the rotating speed of 400r/min, and uniformly stirring;
s3, dropwise adding 5L of sodium citrate aqueous solution with the mass concentration of 100g/L under the stirring of the rotating speed of 400r/min, stopping stirring after uniformly stirring, and soaking for 1h to obtain silicon carbide-nano silver hybrid mixed solution;
s4, adding 0.1kg of polydiallyldimethyl ammonium chloride into the immersed silicon carbide-nano silver mixed solution under the stirring of the rotating speed of 90r/min, uniformly stirring, carrying out ultrasonic vibration for 1h at the frequency of 20Hz after uniformly stirring, filtering, collecting a filter body, and then drying at the temperature of 75 ℃ in an oven to constant weight to obtain the silicon carbide-nano silver hybrid particles.
A production process of a silica gel antibacterial sleeve comprises the following steps:
7.0kg of polysiloxane, specifically polydimethylsiloxane with the viscosity of 1000, 0.16kg of KH570 and 0.7kg of silicon carbide-nano silver hybrid particles prepared in the steps are weighed, added into a mixing mill, mixed for 1h at 135 ℃ to obtain a silicone rubber matrix, the silicone rubber matrix is cooled to room temperature, then 0.11kg of diethylenetriamine is added for kneading, and the silicone rubber matrix is molded for 15min at 150 ℃ to obtain the silicone rubber antibacterial sleeve.
Example 2
Preparation of silicon carbide-nano silver hybrid particles:
s1, adding 1.16kg of silicon carbide particles into 5L of N, N-dimethylformamide solvent, continuously stirring at a rotating speed of 300r/min, wherein the particle size of the silicon carbide particles is 1.5-2.5 mu m, and uniformly stirring;
s2, adding a silver nitrate solution with the concentration of 10.5L under stirring at the rotating speed of 400r/min, wherein the mass concentration of the silver nitrate is 200g/L, and stirring uniformly;
s3, under the stirring of a rotating speed of 400r/min, dropwise adding 7L of sodium citrate aqueous solution, wherein the mass concentration of the sodium citrate aqueous solution is 100g/L, stopping stirring after stirring uniformly, and soaking for 1.4h to obtain a silicon carbide-nano silver hybridization mixed solution;
s4, adding 0.12kg of polydiallyldimethyl ammonium chloride into the immersed silicon carbide-nano silver mixed solution under the stirring of the rotating speed of 90r/min, uniformly stirring, carrying out ultrasonic vibration for 1h under the frequency of 20Hz after uniformly stirring, filtering, and then drying to constant weight at the temperature of 75 ℃ in an oven to obtain the silicon carbide-nano silver hybrid particles.
A production process of a silica gel antibacterial sleeve comprises the following steps:
8.12kg of polysiloxane, specifically polydimethylsiloxane with the viscosity of 1000, 0.19kg of KH570 and 0.81kg of silicon carbide-nano silver hybrid particles prepared in the previous step are weighed, added into a mixer, mixed for 2.5 hours at 139 ℃ to obtain a silicone rubber matrix, the silicone rubber matrix is cooled to room temperature, then 0.14kg of diethylenetriamine is added for kneading, and the silicone rubber matrix is molded for 17 minutes at 156 ℃ under the pressure of 9MPa to obtain the silicone rubber antibacterial sleeve.
Example 3
Preparation of silicon carbide-nano silver hybrid particles:
s1, adding 1.3kg of silicon carbide particles into 5L of N, N-dimethylformamide solvent, continuously stirring at a rotating speed of 300r/min, wherein the particle size of the silicon carbide particles is 1.5-2.5 mu m, and uniformly stirring;
s2, adding a silver nitrate solution with the concentration of 13L and the mass concentration of 200g/L under stirring at the rotating speed of 400r/min, and uniformly stirring;
s3, dropwise adding 10.4L of sodium citrate aqueous solution with the mass concentration of 100g/L under the stirring of the rotating speed of 400r/min, stopping stirring after stirring uniformly, and soaking for 1h to obtain a silicon carbide-nano silver hybrid mixed solution;
s4, adding 0.26kg of polydiallyl dimethyl ammonium chloride into the immersed silicon carbide-nano silver mixed solution under stirring at a rotating speed of 30r/min, uniformly stirring, performing ultrasonic vibration for 1h at a frequency of 20Hz after uniformly stirring, filtering, and drying to constant weight at a temperature of 75 ℃ in an oven to obtain the silicon carbide-nano silver hybrid particles.
A production process of a silica gel antibacterial sleeve comprises the following steps:
9.12kg of polysiloxane, specifically polydimethylsiloxane with the viscosity of 1000, 0.21kg of KH570 and 0.91kg of silicon carbide-nano silver hybrid particles prepared in the previous step are weighed, added into a mixer, mixed for 4 hours at 145 ℃ to obtain a silicone rubber matrix, the silicone rubber matrix is cooled to room temperature, then 0.16kg of diethylenetriamine is added for kneading, and the silicone rubber matrix is molded for 20 minutes at 160 ℃ to obtain the silicone rubber antibacterial sleeve.
Example 4
This example differs from example 3 in that the silicon carbide particles used the pretreated silicon carbide particles of preparation example 1.
Example 5
This example differs from example 3 in that the silicon carbide particles used the pretreated silicon carbide particles of preparation example 2.
Example 6
This example differs from example 3 in that the sodium citrate is replaced by an equivalent amount of ferrous sulfate.
Example 7
This example differs from example 3 in that the added amount of polydiallyldimethyl ammonium chloride was 0.13kg, 0.13kg of polyaluminum chloride and 0.13kg of polyvinyl alcohol were also added, and the degree of polymerization of the polyvinyl alcohol was 1200.
Example 8
The difference between this example and example 7 is that the degree of polymerization of the polyvinyl alcohol is 2000.
Example 9
This example differs from example 8 in that the amount of polyvinyl alcohol added was 0.26kg.
Example 10
This example differs from example 9 in that the amount of polyvinyl alcohol added was 0.3kg.
Comparative example
Comparative example 1
The comparative example was different from example 3 in that the preparation of silicon carbide-nano silver hybrid particles was omitted, 0.91kg of nano silver powder and 9.12kg of polysiloxane, specifically, polydimethylsiloxane having a viscosity of 1000 were directly added into a kneader, the particle size of the nano silver powder was 200nm, kneaded at 145 ℃ for 4 hours to obtain a silicone rubber matrix, the silicone rubber matrix was cooled to room temperature, then 0.16kg of diethylenetriamine was added for kneading, and molding was performed at 160 ℃ for 20 minutes under a pressure of 12MPa to obtain a silicone rubber antibacterial jacket.
Comparative example 2
The comparative example was different from example 3 in that the preparation of silicon carbide-nano silver hybrid particles was omitted, 0.91kg of silicon carbide particles and 9.12kg of polysiloxane, specifically, polydimethylsiloxane having a viscosity of 1000, were directly added to a kneader, and kneaded at 145℃for 4 hours to obtain a silicone rubber matrix, which was cooled to room temperature, and then 0.16kg of diethylenetriamine was added to knead, and molded at 160℃for 20 minutes under a pressure of 12MPa to obtain a silicone rubber antibacterial jacket.
Comparative example 3
The comparative example was different from example 3 in that the preparation of the silicon carbide-nano silver hybrid particles was omitted, 0.51kg of nano silver powder, 0.4kg of silicon carbide particles and 9.12kg of polysiloxane, specifically, polydimethylsiloxane having a viscosity of 1000, were directly added to a kneader, kneaded at 145℃for 4 hours to obtain a silicone rubber matrix, the silicone rubber matrix was cooled to room temperature, then 0.16kg of diethylenetriamine was added for kneading, and molded at 160℃for 20 minutes under a pressure of 12MPa to obtain a silicone rubber antibacterial jacket.
Comparative example 4
The difference between the public transport vehicle hand-pulled ring silica gel antibacterial sleeve and the preparation method is that polydiallyldimethyl ammonium chloride is not added in the preparation method of the silicon carbide-nano silver hybrid particles compared with the preparation method of the embodiment 3.
Performance test
1. Antibacterial properties: the antibacterial silica gel sleeves prepared in the examples and comparative examples of the present application were used to prepare samples, and according to GB/T21866-2008 "antibacterial paint film antibacterial Performance assay and antibacterial Effect", samples were prepared and the antibacterial ratio of the standard samples was measured.
2. Antimicrobial durability: the antibacterial silica gel sleeves prepared in the examples and comparative examples of the present application were prepared, and the samples were immersed in artificial sweat at 37℃for 24 hours, and finally taken out, and the model of the artificial sweat used in the experiment was KM1-1700-0541, and according to GB/T21866-2008 "antibacterial paint film antibacterial Performance assay and antibacterial Effect", the samples were prepared and the antibacterial rate of the standard samples was measured.
3. Corrosion resistance: the antibacterial silica gel sleeves prepared in the examples and comparative examples are used for preparing test bars, the prepared test bars are divided into two groups, the first group of test bars are not soaked in artificial sweat, and the tensile strength B of the first group of test bars is tested 1 The second group of sample strips is soaked in artificial sweat at 37 ℃ for 24 hours, and the tensile strength B of the second group of sample strips soaked in the artificial sweat bubbles is tested 2 The model of the artificial sweat used in the experiment is KM1-1700-0541, and the tensile strength reduction rate of the soaked sample bar are measured according to GB/T528-2009 determination of tensile stress and strain properties of vulcanized rubber or thermoplastic rubber, and the calculation formula of the tensile strength reduction rate is as follows: calculation (B) 2 -B 1 )/B 2 *100％。
3. Abrasion resistance: samples were prepared and the mass m of the sample before grinding was measured according to GB/T1689-2014 determination of abrasion resistance of vulcanized rubber (with an Aldrich abrasion tester) 1 And the mass m after grinding 2 Calculate (m 2 -m 1 ) And/m 1 is 100% to obtain the wear rate.
The test results are shown in tables 1-2:
table 1 results of the performance measured for each example
TABLE 2 corrosion resistance results for the examples
The results of the performance test of each comparative example are shown in tables 3 to 4:
table 3 results of the properties measured for each comparative example
Table 4 results of the corrosion resistance measured for each comparative example
Analysis of results
1. It can be seen from the combination of example 3 and comparative example 1 and the combination of tables 1 to 4 that in comparative example 1, when nano silver powder is directly mixed into polysiloxane for mixing, and silicon carbide particles are not added, the antibacterial rate is reduced after artificial sweat in comparative example 1 is soaked, and the abrasion rate is maximum, and it can be seen that after silicon carbide particles are distributed in a silica gel matrix, the silicon carbide particles have the characteristics of high hardness and abrasion resistance, and play a role in reinforcing the silica gel matrix, so that the abrasion resistance of the prepared antibacterial silica gel sleeve is improved.
2. As can be seen from the combination of example 3 and comparative example 2 and the combination of tables 1 to 4, the comparative example 2 was not added with nano silver powder or nano silver antibacterial agent, and although the comparative example 3 was not very different from the comparative example 2 in terms of abrasion rate and corrosion resistance, the antibacterial property and antibacterial rate after artificial sweat soaking of the comparative example 2 were much smaller than those of the example 3, and it was seen that the antibacterial property and antibacterial durability were poor in the silicone jacket prepared without adding antibacterial agent.
3. It can be seen from the combination of example 3 and comparative example 3 and the combination of tables 2 to 3 that in comparative example 3, nano silver powder, silicon carbide and polydimethylsiloxane are directly mixed, and the antibacterial rate of the artificial sweat in comparative example 3 after soaking is far smaller than that in example 3, and it can be seen that by preparing silicon carbide-nano silver hybrid particles, nano silver is coated on the surfaces of silicon carbide particles, slow release and uniform distribution of nano silver particles in a silica gel system are realized, so that the effect of prolonging antibacterial time is achieved, and antibacterial durability is improved.
4. It can be seen from the combination of example 3 and comparative example 4 and the combination of tables 2 to 3 that the comparative example 4 was free of added polydiallyldimethyl ammonium chloride and polyaluminium chloride, the abrasion rate of comparative example 4 was large relative to that of example 3, and the antibacterial property, antibacterial rate after artificial sweat soaking and corrosion resistance of comparative example 4 were low relative to that of example 3; it can be seen that the interfacial tension of the silicon carbide-nano silver particles is increased without adding a dispersing agent, and the mutual combination and agglomeration can occur in a mixed system, thereby influencing the performance of the prepared antibacterial silica gel sleeve.
5. It can be seen from the combination of examples 1-3 with examples 4 and 5 and the combination of tables 2-3 that the surface pretreatment of the silicon carbide particles in example 4 has higher antibacterial rate and higher antibacterial rate after the artificial sweat soaking in example 4 and example 5, and the potholes on the pretreated silicon carbide surfaces are convenient for the nano silver particles to etch and coat the surfaces of the silicon carbide particles, so that the antibacterial property and the antibacterial durability of the prepared silica gel antibacterial sleeve are improved.
6. As can be seen from the combination of examples 1-3 and examples 9 and 10 and the combination of tables 2-3, the examples 1-3 are not added with polyvinyl alcohol, and the examples 1-3 and comparative examples 9 and 10 are poor in performance, it can be seen that, due to the good adhesiveness and film forming property of the protective agent, a protective film is formed on the surface of the silicon carbide-nano silver hybrid particles, the stability of the nano silver particles coated on the surfaces of the silicon carbide particles is improved, so that the performance of the silica gel antibacterial sleeve is improved, and when the polymerization degree of the protective agent polyvinyl alcohol is 2000, the weight ratio of silicon carbide, silver nitrate, polydiallyl dimethyl ammonium chloride, polyaluminium chloride and polyvinyl alcohol is 100:200: (5-10): (5-10): and (20-22), the prepared antibacterial silica gel sleeve has good performances.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (10)
1. The utility model provides a public transport means hand ring silica gel antibacterial sleeve which is characterized by comprising the following raw materials in parts by weight:
700-912 parts of polysiloxane;
70-91 parts of silicon carbide-nano silver hybrid particles;
16-21 parts of a coupling agent;
11-16 parts of curing agent;
the preparation raw materials of the silicon carbide-nano silver hybrid particles comprise silicon carbide particles, silver nitrate, a reducing agent and a dispersing agent, wherein the weight ratio of the silicon carbide particles to the silver nitrate to the reducing agent to the dispersing agent is 10: (17-20): (5-8): (1-2);
the preparation method of the silicon carbide-nano silver hybrid particles comprises the following steps:
adding silicon carbide particles into an organic solvent for dispersion, then adding a silver nitrate solution, stirring uniformly, adding a reducing agent, stirring uniformly, dipping for 1-2h, adding a dispersing agent, and stirring uniformly;
and (3) filtering the uniformly stirred mixture, and drying filter residues to obtain the silicon carbide-nano silver hybrid particles.
2. The antimicrobial sleeve of public transportation means pull ring silica gel of claim 1, wherein the silicon carbide particles are pre-treated silicon carbide particles, the pre-treating step of pre-treating the silicon carbide particles is: adding the silicon carbide particles into a mixed solution of hydrofluoric acid and hydrochloric acid, carrying out acid washing for 8-10min, filtering, separating, washing with water, and drying to obtain pretreated silicon carbide particles, wherein the weight ratio of the silicon carbide particles to the hydrofluoric acid to the hydrochloric acid is 2: (2-3): (4-5).
3. The public transportation vehicle pull ring silicone antimicrobial sleeve of claim 1, wherein the coupling agent is selected from one or more of KH550, KH560, and KH 570.
4. The public transportation vehicle pull ring silicone antimicrobial sleeve of claim 1, wherein the curing agent is selected from one of diethylenetriamine and triethylenetetramine.
5. The public transportation hand-pull ring silicone antimicrobial sleeve of claim 1, wherein the reducing agent is selected from one or more of sodium citrate, sodium borohydride, and ferrous sulfate.
6. The public transportation vehicle pull ring silicone antimicrobial sleeve of claim 1, wherein the dispersant is selected from one or more of polydiallyl dimethyl ammonium chloride and polyaluminum chloride.
7. The public transportation vehicle pull ring silica gel antibacterial sleeve according to claim 1, wherein the raw material of the silicon carbide-nano silver hybrid particles further comprises a protective agent, and the protective agent is one or more selected from polyvinyl alcohol, polyvinylpyrrolidone and polyethylene glycol.
8. The antimicrobial glove of public transportation means hand ring silica gel according to claim 7, wherein the dispersant is selected from polydiallyl dimethyl ammonium chloride and polyaluminum chloride, the protectant is selected from polyvinyl alcohol, the degree of polymerization of the polyvinyl alcohol is 2000, and the weight ratio of silicon carbide, silver nitrate, polydiallyl dimethyl ammonium chloride, polyaluminum chloride, polyvinyl alcohol is 100:200: (5-10): (5-10): (20-23).
9. The mass transit hand ring silica gel antimicrobial sleeve of claim 1 wherein said silicon carbide particles have a particle size in the range of 1.5-2.5 μm.
10. A method for preparing a public transportation vehicle hand-pulled ring silica gel antibacterial sleeve, which is characterized by comprising the following steps of:
mixing silicon carbide-nano silver hybrid particles, a coupling agent and polysiloxane, mixing at 135-145 ℃ for 1-4h to obtain a silicon rubber matrix, cooling the silicon rubber matrix to room temperature, adding a curing agent for kneading, and performing mould pressing at 150-160 ℃ for 15-20min under the pressure of 2-12MPa to obtain the silica gel antibacterial sleeve.
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| CN102400121A (en) * | 2011-11-05 | 2012-04-04 | 上海上大瑞沪微系统集成技术有限公司 | Preparation process of nano ceramic particles for reinforcing composite lead-free solder |
| CN107523999A (en) * | 2017-07-28 | 2017-12-29 | 江苏新瑞贝科技股份有限公司 | A kind of preparation method of textile antibacterial agent |
| CN110089524A (en) * | 2018-01-31 | 2019-08-06 | 皇杰新能源科技(上海)有限公司 | Graphene coated nano silver antibacterial material and preparation method thereof |
| CN113617353A (en) * | 2021-08-02 | 2021-11-09 | 常州大学 | Preparation method of silicon carbide-based silver nano catalyst and application of silicon carbide-based silver nano catalyst in synthesis of ethylene oxide |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107141502B (en) * | 2017-05-31 | 2019-08-23 | 泰州度博迈医疗器械有限公司 | A kind of antibacterial silicon rubber, preparation method and applications |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400121A (en) * | 2011-11-05 | 2012-04-04 | 上海上大瑞沪微系统集成技术有限公司 | Preparation process of nano ceramic particles for reinforcing composite lead-free solder |
| CN107523999A (en) * | 2017-07-28 | 2017-12-29 | 江苏新瑞贝科技股份有限公司 | A kind of preparation method of textile antibacterial agent |
| CN110089524A (en) * | 2018-01-31 | 2019-08-06 | 皇杰新能源科技(上海)有限公司 | Graphene coated nano silver antibacterial material and preparation method thereof |
| CN113617353A (en) * | 2021-08-02 | 2021-11-09 | 常州大学 | Preparation method of silicon carbide-based silver nano catalyst and application of silicon carbide-based silver nano catalyst in synthesis of ethylene oxide |
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