CN108727821B - Modified silica gel product and preparation method thereof - Google Patents
Modified silica gel product and preparation method thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to the field of silica gel products, in particular to a modified silica gel product and a preparation method thereof. A modified silica gel product comprises the following components in parts by weight: 50-70 parts of silica gel, 30-50 parts of white carbon black, 0.1-5.0 parts of graphene material, 0.5-5.0 parts of silicone oil and 0.2-2.0 parts of bridging agent. According to the invention, the graphene material is creatively added into the silica gel product, all components are synergistically matched and enhanced, and the prepared modified silica gel product has a far infrared function, can increase human body microcirculation, is good in air permeability and comfortable to use, and also has the effect of inhibiting bacterial growth. According to the preparation method of the modified silica gel product, the graphene materials with different particle sizes are gradually added, so that the dispersion of the graphene materials in the whole modified silica gel product system is facilitated, the dispersion is uniform and stable, the intrinsic characteristic of the graphene is more easily exerted, and the obtained modified silica gel product has excellent performance.
Description
Technical Field
The invention relates to the field of silica gel products, in particular to a modified silica gel product and a preparation method thereof.
Background
The silica gel product is a processed product taking silica gel as a main raw material, and is mainly used for household appliance accessories, various toys, ornaments, kitchen supplies, various game machine silica gel sleeves, mobile phone silica gel sleeves, MP3, MP4 silica gel sleeve series, silica gel tableware, silica gel watchbands, silica gel swimming caps, infant nipples, silica gel conductive key products, silica gel sundry products, anti-slip foot pads, shock pads, sealing rings and other silica gel products.
For example, facial masks are a carrier of beauty care products, are relatively common beauty consumer products in the market at present, and with the improvement of the quality of living standard of people, the demand of facial masks, especially facial masks with high-end specific functions, is increasing. The facial mask is generally applied to the face for 15-30 minutes, and the facial mask can be detached after essence on the surface is absorbed by the skin. The traditional powder blending, kaolin, non-woven fabrics, silk facial masks and facial masks made of biological fibers are widely used.
The principle of the traditional mask is as follows: the skin mask temporarily isolates the outside air and pollution by using the short time of covering the face, improves the temperature of the skin, expands pores of the skin, promotes the secretion and metabolism of sweat glands, increases the oxygen content of the skin, and is beneficial to the skin to discharge products generated by the metabolism of epidermal cells and accumulated grease substances. Meanwhile, essence and water in the facial mask permeate into the horny layer of the epidermis, so that the skin becomes soft, natural, bright and elastic.
The existing mask is basically a disposable consumer product, when the mask is used, one side of the mask is in contact with the skin, the other side of the mask is in contact with the atmosphere, and although the mask has good air permeability, the problems caused by the mask are obvious, mainly manifested in that the volatilization of moisture and nutrients is accelerated, the temperature on the surface of the mask is dissipated, the metabolism on the surface of the skin is not facilitated, and the absorption of the moisture and the nutrients and the discharge of metabolic wastes are influenced.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first object of the present invention is to provide a modified silica gel product which has excellent far infrared emission properties, promotes microcirculation in the human body, has good air permeability and is comfortable to use, and also has the effect of inhibiting the growth of bacteria.
The second objective of the present invention is to provide a preparation method of the modified silica gel product, in which graphene materials with different particle sizes are gradually added, so that the graphene materials mainly exist in the modified silica gel product in two forms, which is more beneficial to dispersion of the graphene materials in the whole modified silica gel product system, the dispersion is uniform and stable, the intrinsic characteristics of graphene are more easily exerted, and the obtained modified silica gel product has excellent performance.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
a modified silica gel product comprises the following components in parts by weight: 50-70 parts of silica gel, 30-50 parts of white carbon black, 0.1-5.0 parts of graphene material, 0.5-5.0 parts of silicone oil and 0.2-2.0 parts of bridging agent.
According to the invention, the graphene material is creatively added into the silica gel product, and all components are synergistically matched and enhanced, so that the prepared modified silica gel product has a higher far infrared function, can increase human body microcirculation, has good air permeability and comfortable use, and also has the effect of inhibiting bacterial growth.
In order to further enhance the synergistic enhancement effect among the components, the prepared modified silica gel product has good performance, and preferably comprises the following components in parts by weight: 50-65 parts of silica gel, 35-45 parts of white carbon black, 0.5-4.0 parts of graphene material, 1-4 parts of silicone oil and 0.5-1.5 parts of bridging agent.
More preferably, the following components are contained in parts by weight: 55-60 parts of silica gel, 38-42 parts of white carbon black, 1-3 parts of graphene material, 1.5-2.5 parts of silicone oil and 1-1.5 parts of bridging agent.
Further, the graphene material comprises a graphene material with a particle size of less than 1 μm and a graphene material with a particle size of 1-10 μm;
the graphene material mainly exists in the modified silica gel product in two forms, wherein the graphene material with the particle size smaller than 1 mu m is mainly combined with the white carbon black in an adsorption mode; the graphene material with the particle size of 1-10 μm exists in the modified silica gel product mainly in a dispersed form.
In the research and development process, the inventor finds that graphene is not easy to be uniformly dispersed in the silica gel system, and the smaller the particle size of the graphene is, the more easily the graphene is agglomerated. In view of the above, the inventor finds, through a large number of experiments, that graphene with a smaller particle size can be firstly combined with white carbon black through an adsorption effect, and then graphene with a larger particle size is re-dispersed, so that the graphene has good dispersibility, the obtained dispersion system is stable, and the obtained modified silica gel product has excellent performance.
The graphene material having a particle size of less than 1 μm, i.e., D100, may be 0.1 μm, 0.2 μm, 0.3 μm, 0.5 μm, 0.6 μm, 0.8 μm, 0.9 μm, etc. Graphene materials with particle sizes of 1-10 μm, i.e., a minimum particle size of 1 μm, and a maximum particle size of 2 μm, 3 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, and so forth.
In order to achieve a better dispersion balance system, the adding weight ratio of the graphene material with the particle size of less than 1 μm to the graphene material with the particle size of 1-10 μm is 1: 1-10, preferably 1: 1-5, more preferably 1: 2-3.
Further, the graphene material comprises one or more of graphene, reduced graphene oxide, biomass graphene and derivatives thereof;
the graphene material is preferably biomass graphene.
The biomass graphene is a composite carbon material which is prepared by using biomass as a main raw material through processes of catalysis, carbonization and the like, contains a single-layer graphene, few-layer graphene and a graphene nanosheet structure, and can be loaded with a metal/nonmetal compound. Other allotropes of carbon elements, graphene structures with non-single or even multiple layers (e.g., 3, 5, 10, 20 layers, etc.), or other elements may be present in the biomass graphene.
For the "other elements" described above:
in the biomass graphene prepared by using biomass as a raw material, the raw material is derived from plants, and the plants need to absorb mineral elements from soil, and the mineral elements can be selectively retained in the process of preparing the biomass graphene, wherein the mineral elements are at least Fe, Si and Al, and can also contain one or more of K, Na, Ca, Mg, P, Mn and Co.
Specifically, the biomass graphene used in the present invention can be prepared by using an existing preparation method, for example: the method disclosed in CN 104118873A; the method disclosed in CN 104016341A; the method disclosed in CN 104724696A; the method disclosed in CN 104724699A; CN105060289A, and the like.
Further, the silicone oil comprises one or a mixture of more than two of methyl silicone oil, ethyl silicone oil, vinyl silicone oil, methyl hydroxyl silicone oil, high hydrogen-containing silicone oil, ethyl hydrogen-containing silicone oil and hydroxyl hydrogen-containing silicone oil. The modified silica gel products prepared by the silicone oil have excellent performance.
Further, the bridging agent comprises one or a mixture of more than two of benzoyl peroxide, 2, 4-dichlorobenzoyl peroxide, di-tert-butyl peroxide, diisopropylamine peroxide and ethyl orthosilicate. The modified silica gel products prepared by the bridging agents have excellent performance through verification.
Preferably, the silica gel is food grade silica gel.
Preferably, the white carbon black is prepared by adopting a precipitation method.
Further, the modified silica gel product comprises a mask, a mask cover, a nose cover, a pipe and a keyboard.
The modified silica gel product provided by the invention can be prepared into masks, mask covers, nose masks, pipes, keyboards and the like. The far infrared ray released by the product is absorbed by human body, promotes microcirculation, accelerates metabolism, has good air permeability, is comfortable to use, and also has the function of inhibiting bacteria growth.
The invention also provides a preparation method of the modified silica gel product, which comprises the steps of mixing the components and vulcanizing.
The preparation method of the modified silica gel product provided by the invention is simple and feasible, and is easy to popularize and apply in a large range.
Further, the mixing of the components is specifically as follows:
(a) adding a graphene material with the particle size smaller than 1 mu m into at least one of silica gel, a bridging agent, white carbon black and silicone oil, and then adding the rest components for mixing to obtain a first mixture;
(b) and adding the graphene material with the particle size of 1-10 mu m into the first mixture, and uniformly mixing.
The remaining components in step (a) are for silica gel, bridging agent, white carbon black and silicone oil, such as: if the graphene material with the particle size smaller than 1 mu m is added into the silica gel, then the rest components are the bridging agent, the white carbon black and the silicone oil; if the graphene material with the particle size smaller than 1 mu m is added into the silica gel and the bridging agent, then the rest components are the white carbon black and the silicone oil; and so on.
According to the invention, the graphene material with small particle size is added firstly, and because the graphene material with small particle size is easy to agglomerate and is not well dispersed, the graphene material with small particle size is mixed with any one or more of other components, the graphene material is partially dispersed firstly, then the rest components are added, the graphene material is mainly combined with the white carbon black in an adsorption manner, the adsorbed graphene material is in a stable state, and a good environment is provided for adding the graphene with large particle size; at this time, the large-particle-size graphene is added, and the large-particle-size graphene material mainly exists in the modified silica gel product in a dispersed form and is in a stable equilibrium state. The finally prepared modified silica gel product has uniform and stable dispersion of graphene, the graphene can fully exert the functions of the product and is matched with other components, and the prepared modified silica gel product has excellent performance.
Preferably, step (a) is: firstly, mixing white carbon black and a graphene material with the particle size smaller than 1 mu m, then adding silica gel, a bridging agent and silicone oil, and uniformly mixing to obtain the first mixture.
The unexpected discovery in the experimentation, the graphite alkene of small particle size and white carbon black directly have certain adsorption affinity, and the graphite alkene of small particle size can adsorb on white carbon black, and like this, white carbon black and the graphite alkene of small particle size mix earlier, and both adsorb each other, carry out the predispersion through white carbon black with graphite alkene promptly, then add silica gel, bridging agent and silicone oil, these three kinds of compositions can add together also can not limit the addition of order alone for graphite alkene and white carbon black disperse in the system together, form comparatively homogeneous system. At the moment, the graphene with larger grain diameter is added, the graphene is easy to disperse, the method is simple and easy to implement, the graphene in the obtained product is uniformly dispersed, and the product performance is excellent.
Since the small-sized graphene is easily agglomerated and is not easily dispersed, it is preferable that the graphene material having a particle size of less than 1 μm is mixed with other components in step (a) in batches, and each time the graphene material-containing component is mixed, the component containing the graphene material is not more than 10 times of the component not containing the graphene material by mass, such as 1 time, 2 times, 3 times, 5 times, 7 times, 8 times, 10 times, and the like.
By adding the small-particle-size graphene in batches, the small-particle-size graphene can be dispersed more easily and uniformly.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the graphene material is creatively added into the silica gel product, all components are synergistically matched and enhanced, and the prepared modified silica gel product has a far infrared function, can increase human body microcirculation, is good in air permeability and comfortable to use, and also has the effect of inhibiting bacterial growth.
(2) The invention limits the graphene materials with different particle diameters to exist in the modified silica gel product in different modes, can give full play to the characteristics of the graphene materials, and the obtained modified silica gel product has excellent performance.
(3) The invention also limits the using amount of the graphene materials with different grain diameters, and achieves a better dispersion balance system.
(4) The modified silica gel product provided by the invention can be used for preparing different products such as masks, mask covers, nose masks, pipes and keyboards through different molds, and is wide in application.
(5) According to the invention, the graphene materials with different particle sizes are gradually added, so that the graphene materials are uniformly and stably dispersed in the whole system, and the obtained modified silica gel product has stable and excellent performance.
(6) According to the invention, the graphene material with small particle size is gradually added, so that the agglomeration of the graphene material with small particle size is effectively prevented, and a good foundation is provided for the addition of the graphene material with large particle size.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
Taking the following components: 60 parts of food-grade silica gel, 40 parts of white carbon black prepared by a precipitation method, 3 parts of biomass graphene (the particle size D100 is 0.5 mu m and 0.5 part, the particle size is 1-5 mu m and 2.5 parts), 2 parts of methyl silicone oil and 1 part of 2, 4-dichlorobenzoyl peroxide;
the components were mixed in the following manner:
group 1: directly mixing the components;
group 2: (a) mixing biomass graphene with the particle size D100 ═ 0.5 μm with silica gel powder, then adding a bridging agent, white carbon black and silicone oil, and uniformly mixing to obtain a first mixture;
(b) and adding the biomass graphene with the particle size of 1-5 mu m into the first mixture, and uniformly mixing.
Group 3: (a) mixing biomass graphene with the particle size D100 being 0.5 mu m with white carbon black, adding a bridging agent, silica gel and silicone oil, and uniformly mixing to obtain a first mixture;
(b) and adding the biomass graphene with the particle size of 1-5 mu m into the first mixture, and uniformly mixing.
Group 4: (a) mixing biomass graphene with the particle size D100 being 0.5 mu m with a bridging agent, adding white carbon black, silica gel and silicone oil, and uniformly mixing to obtain a first mixture;
(b) and adding the biomass graphene with the particle size of 1-5 mu m into the first mixture, and uniformly mixing.
Group 5: (a) mixing biomass graphene with the particle size D100 being 0.5 mu m with silicone oil, adding white carbon black, silica gel and a bridging agent, and uniformly mixing to obtain a first mixture;
(b) and adding the biomass graphene with the particle size of 1-5 mu m into the first mixture, and uniformly mixing.
Group 6: (a) mixing biomass graphene with the particle size D100 being 0.5 mu m with a bridging agent and white carbon black, then adding silica gel and silicone oil, and uniformly mixing to obtain a first mixture;
(b) and adding the biomass graphene with the particle size of 1-5 mu m into the first mixture, and uniformly mixing.
Group 7: (a) mixing biomass graphene with the particle size D100 being 0.5 mu m with silicone oil and a bridging agent, then adding white carbon black and silica gel, and uniformly mixing to obtain a first mixture;
(b) and adding the biomass graphene with the particle size of 1-5 mu m into the first mixture, and uniformly mixing.
Group 8: (a) mixing biomass graphene with the particle size D100 of 0.5 mu m with white carbon black and silicone oil, then adding the silicone oil and a bridging agent, and uniformly mixing to obtain a first mixture;
(b) and adding the biomass graphene with the particle size of 1-5 mu m into the first mixture, and uniformly mixing.
Group 9: (a) mixing biomass graphene with the particle size D100 being 0.5 mu m with white carbon black in batches, then adding a bridging agent, silica gel and silicone oil in batches, wherein during each mixing, the component containing the graphene material is 10 times of the component not containing the graphene material in mass, and uniformly mixing to obtain a first mixture;
(b) and adding the biomass graphene with the particle size of 1-5 mu m into the first mixture, and uniformly mixing.
Group 10: (a) mixing biomass graphene with the particle size D100 being 0.5 mu m with silicone oil in batches, then adding a bridging agent, silica gel and white carbon black in batches, wherein during each mixing, the component containing the graphene material is 10 times of the component not containing the graphene material in mass, and uniformly mixing to obtain a first mixture;
(b) and adding the biomass graphene with the particle size of 1-5 mu m into the first mixture, and uniformly mixing.
And adding the mixture obtained after mixing into a mold, and vulcanizing to obtain the mask cover.
Covering the prepared mask under a microscope to observe the dispersion uniformity of the components, and sequencing, wherein the sequence from good dispersion uniformity to poor dispersion uniformity is as follows: group 9, group 10, group 3, group 6, group 8, group 5, group 7, group 4, group 2, group 1.
In addition, changing the type of graphene material, such as adopting one or more of the commercially available graphene, reduced graphene oxide, graphene oxide and derivatives thereof, can obtain the same result as the above result;
changing the kind of silicone oil such as one or more of ethyl silicone oil, vinyl silicone oil, methyl hydroxyl silicone oil, high hydrogen-containing silicone oil, ethyl hydrogen-containing silicone oil, hydroxyl hydrogen-containing silicone oil to obtain the same result as above;
the same results as above can be obtained by changing the kind of the bridging agent such as benzoyl oxide, benzoyl 2, 4-dichloroperoxide, di-tert-butyl peroxide, diisopropylamine peroxide and one or more than two of ethyl orthosilicate.
Example 2
A modified silica gel article prepared by the steps of:
taking the following components: according to parts by weight, 50 parts of food-grade silica gel, 30 parts of white carbon black prepared by a precipitation method, 0.1 part of reduced graphene oxide (the particle size D100 is 0.8 mu m and 0.05 part of particle size is 1-6 mu m), 0.5 part of vinyl silicone oil and 0.2 part of di-tert-butyl peroxide;
(a) mixing reduced graphene oxide with the particle size D100 being 0.8 mu m with white carbon black in batches, adding bridging agent di-tert-butyl peroxide, silica gel and vinyl silicone oil in batches, wherein during each mixing, the component containing the graphene material is 9 times of the component not containing the graphene material in mass, and uniformly mixing to obtain a first mixture;
(b) adding reduced graphene oxide with the particle size of 1-6 mu m into the first mixture, and uniformly mixing;
(c) and putting the obtained mixture into a mold, and vulcanizing to obtain the modified silica gel product.
Example 3
A modified silica gel article prepared by the steps of:
taking the following components: 55 parts of food-grade silica gel, 35 parts of white carbon black prepared by a precipitation method, 0.5 part of graphene oxide (the particle size D100 is 0.3 mu m and 0.1 part of particle size is 1-8 mu m, and 0.4 part of particle size is 0.5 part of ethyl hydrogen-containing silicone oil and 0.5 part of ethyl orthosilicate;
(a) mixing graphene oxide with the particle size D100 being 0.3 mu m with white carbon black in batches, then adding tetraethoxysilane, silica gel and ethyl hydrogen-containing silicone oil in batches, wherein during each mixing, the component containing the graphene material is 8 times of the component not containing the graphene material in mass, and uniformly mixing to obtain a first mixture;
(b) adding graphene oxide with the particle size of 1-8 mu m into the first mixture, and uniformly mixing;
(c) and putting the obtained mixture into a mold, and vulcanizing to obtain the modified silica gel product.
Example 4
A modified silica gel article prepared by the steps of:
taking the following components: 55 parts of food-grade silica gel, 38 parts of white carbon black prepared by a precipitation method, 1 part of graphene oxide (the particle size D100 is 0.5 mu m and 0.1 part of particle size is 1-10 mu m and 0.9 part of particle size), 1.5 parts of methyl vinyl silicone oil and 1 part of bridging agent dicumyl peroxide;
(a) mixing oxidized graphene with the particle size D100 being 0.5 mu m with white carbon black in batches, then adding bridging agents of dicumyl peroxide, silica gel and methyl vinyl silicone oil in batches, wherein during each mixing, the mass of the component containing the graphene material is 2 times that of the component not containing the graphene material, and uniformly mixing to obtain a first mixture;
(b) adding graphene oxide with the particle size of 1-10 mu m into the first mixture, and uniformly mixing;
(c) and putting the obtained mixture into a mold, and vulcanizing to obtain the modified silica gel product.
Example 5
A modified silica gel article prepared by the steps of:
taking the following components: 60 parts of food-grade silica gel, 42 parts of white carbon black prepared by a precipitation method, 3 parts of biomass graphene (the particle size D100 is 0.5 mu m 1 part, and the particle size is 1-2 mu m 2 parts), 2.5 parts of methylhydroxy silicone oil and 1.5 parts of bridging agent di-tert-butyl peroxide;
(a) mixing biomass graphene with the particle size D100 being 0.5 mu m with silicone oil in batches, then adding a bridging agent, silica gel and white carbon black in batches, wherein during each mixing, the component containing the graphene material is 10 times of the component not containing the graphene material in mass, and uniformly mixing to obtain a first mixture;
(b) adding biomass graphene with the particle size of 1-2 microns into the first mixture, and uniformly mixing;
(c) and putting the obtained mixture into a mold, and vulcanizing to obtain the modified silica gel product.
Example 6
A modified silica gel article prepared by the steps of:
taking the following components: according to parts by weight, 65 parts of food-grade silica gel, 45 parts of white carbon black prepared by a precipitation method, 4 parts of biomass graphene (the particle diameter D100 is 0.2 mu m 1 part, and the particle diameter is 1-2 mu m 3 parts), 4 parts of high hydrogen-containing silicone oil and 1 part of bridging agent benzoyl peroxide;
(a) mixing biomass graphene with the particle size D100 being 0.2 mu m with silicone oil in batches, then adding a bridging agent, silica gel and white carbon black in batches, wherein during each mixing, the component containing the graphene material is 10 times of the component not containing the graphene material in mass, and uniformly mixing to obtain a first mixture;
(b) adding biomass graphene with the particle size of 1-2 microns into the first mixture, and uniformly mixing;
(c) and putting the obtained mixture into a mold, and vulcanizing to obtain the modified silica gel product.
Example 7
A modified silica gel article prepared by the steps of:
taking the following components: according to parts by weight, 70 parts of food-grade silica gel, 50 parts of white carbon black prepared by a precipitation method, 5 parts of biomass graphene (the particle diameter D100 is 0.2 mu m 1 part, and the particle diameter is 1-2 mu m 4 parts), 5 parts of ethyl silicone oil and 2 parts of bridging agent 2, 4-dichlorobenzoyl peroxide;
(a) mixing biomass graphene with the particle size D100 being 0.2 mu m with white carbon black in batches, then adding a bridging agent, silica gel and ethyl silicone oil in batches, wherein during each mixing, the component containing the graphene material is 10 times of the component not containing the graphene material in mass, and uniformly mixing to obtain a first mixture;
(b) adding biomass graphene with the particle size of 1-2 microns into the first mixture, and uniformly mixing;
(c) and putting the obtained mixture into a mold, and vulcanizing to obtain the modified silica gel product.
Example 8
A modified silica gel article prepared by the steps of:
taking the following components: 60 parts of food-grade silica gel, 40 parts of white carbon black prepared by a precipitation method, 1.1 parts of biomass graphene (the particle size D100 is 0.5 mu m and 0.1 part of 1-5 mu m), 2 parts of methyl hydroxy silicone oil, 0.5 part of 2, 4-dichlorobenzoyl peroxide and 0.5 part of di-tert-butyl peroxide;
(a) mixing biomass graphene with the particle size D100 being 0.5 mu m with white carbon black in batches, then adding a bridging agent, silica gel and silicone oil in batches, wherein during each mixing, the component containing the graphene material is 10 times of the component not containing the graphene material in mass, and uniformly mixing to obtain a first mixture;
(b) adding biomass graphene with the particle size of 1-5 microns into the first mixture, and uniformly mixing;
(c) and putting the obtained mixture into a mold, and vulcanizing to obtain the modified silica gel product.
Example 9
A modified silica gel article prepared by the steps of:
taking the following components: 60 parts of food-grade silica gel, 42 parts of white carbon black prepared by a precipitation method, 4 parts of biomass graphene (the particle diameter D100 is 0.5 mu m 1 part, and the particle diameter is 1-6 mu m 3 parts), 0.5 part of alkenyl silicone oil, 0.5 part of methyl vinyl silicone oil, 0.5 part of methyl hydroxy silicone oil, 0.5 part of high hydrogen-containing silicone oil, 0.5 part of ethyl hydrogen-containing silicone oil, 0.5 part of di-tert-butyl peroxide, 0.5 part of diisopropylamine peroxide, and 0.5 part of ethyl orthosilicate;
(a) mixing biomass graphene with the particle size D100 being 0.5 mu m with silicone oil in batches, then adding a bridging agent, silica gel and white carbon black in batches, wherein during each mixing, the component containing the graphene material is 10 times of the component not containing the graphene material in mass, and uniformly mixing to obtain a first mixture;
(b) adding biomass graphene with the particle size of 1-6 microns into the first mixture, and uniformly mixing;
(c) and putting the obtained mixture into a mold, and vulcanizing to obtain the modified silica gel product.
Example 10
A modified silica gel article prepared by the steps of:
taking the following components: 60 parts of food-grade silica gel, 42 parts of white carbon black prepared by a precipitation method, 3 parts of biomass graphene (with the particle size of 1-5 microns), 1.5 parts of methyl hydroxy silicone oil, 1 part of ethyl hydrogen-containing silicone oil, 0.5 part of 2, 4-dichlorobenzoyl peroxide, 0.5 part of di-tert-butyl peroxide and 0.5 part of diisopropylamine peroxide;
(a) adding the biomass graphene into a mixed solution of methyl hydroxyl silicone oil and ethyl hydrogen-containing silicone oil, and then respectively adding a bridging agent, silica gel and white carbon black to obtain a mixture;
(b) and putting the obtained mixture into a mold, and vulcanizing to obtain the modified silica gel product.
Experimental example 1
The products obtained in group 9 of example 1 and examples 2 to 10 were both a facial mask and a mask cover, the mask was applied directly to the face when used, the mask cover was applied directly to the top of a normal facial mask when used, and the normal facial mask was used as control group 1, while the silica gel facial mask obtained in example 4 under application No. 201510005816.8 was used as control group 2. Each group of users was 100, and the population was 25-40 young and middle aged women, each group of users used the mask and mask prepared in this example and the masks in control groups 1 and 2, respectively, and corresponding to examples 1-10, groups 1-10, respectively. And after the experience is finished, the absorption condition of the lotion and the comfort feeling during wearing are integrated for scoring, and the average value is calculated to obtain the final score. The statistical results are shown in table 1.
TABLE 1 statistical results
The mask or mask cover prepared by the embodiment of the invention can promote the sufficient absorption of the toning lotion, effectively prevent the essence in the mask from volatilizing too fast and help better absorption; and because the facial mask or facial mask cover possesses the far infrared function, can promote the blood microcirculation on skin surface, accelerate metabolism, promote the absorption of essence, accelerate the discharge of metabolic waste, and importantly, the comfort is strong when wearing, and the comprehensive use effect is obviously stronger than that of the control group.
In addition, the silica gel mask provided by the invention can be directly worn after being coated with the toning lotion, so that the same effect as the above effect is achieved.
Experimental example 2
The mask covers prepared in group 9 of example 1 and examples 2-10 were subjected to temperature rise test, specifically referring to GB/T30127 and 2013. Meanwhile, a common facial mask was used as a control 1, and a silica gel facial mask prepared in example 4 with application number 201510005816.8 was used as a control 2. The obtained detection results are shown in table 2.
TABLE 2 temperature rise test results
As can be seen from Table 2, the temperature rise rate of the mask cover prepared by the invention is obviously higher than that of other control groups, which shows that the modified silica gel product prepared by the invention has excellent temperature rise performance.
Experimental example 3
The facial mask covers prepared in group 9 of example 1 and examples 2-10 are tested for antibacterial activity, and the antibacterial activity is specifically tested according to GB/T20944.2-2007 standard. Meanwhile, a common facial mask was used as a control 1, and a silica gel facial mask prepared in example 4 with application number 201510005816.8 was used as a control 2.
The inhibition rates of the mask covers prepared in group 9 of example 1 and examples 2-10 on escherichia coli, staphylococcus aureus and candida albicans are all more than 95%; control 1 was not bacteriostatic; the bacteriostasis rate of the control group 2 is 70 percent. The modified silica gel product prepared by the invention has excellent antibacterial performance.
In addition, the modified silica gel product prepared by the invention is a nose mask or a keyboard, and the comfort is obviously better than that of a commercially available product in the experience of a user.
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (14)
1. A modified silica gel product is characterized by comprising the following components in parts by weight: 50-70 parts of silica gel, 30-50 parts of white carbon black, 0.1-5.0 parts of graphene material, 0.5-5.0 parts of silicone oil and 0.2-2.0 parts of bridging agent;
the graphene material comprises a graphene material with the particle size of less than 1 mu m and a graphene material with the particle size of 1-10 mu m;
the graphene material mainly exists in the modified silica gel product in two forms, wherein the graphene material with the particle size smaller than 1 mu m is mainly combined with the white carbon black in an adsorption mode; the graphene material with the particle size of 1-10 mu m exists in the modified silica gel product mainly in a dispersed form; the adding weight ratio of the graphene material with the particle size less than 1 mu m to the graphene material with the particle size of 1-10 mu m is 1: 1-10;
the preparation method of the modified silica gel product comprises the following steps: mixing the components, and vulcanizing to obtain the product;
the mixing of the components is as follows:
(a) adding a graphene material with the particle size smaller than 1 mu m into at least one of silica gel, a bridging agent, white carbon black and silicone oil, and then adding the rest components for mixing to obtain a first mixture;
(b) and adding the graphene material with the particle size of 1-10 mu m into the first mixture, and uniformly mixing.
2. The modified silica gel article of claim 1, comprising, in parts by weight: 50-65 parts of silica gel, 35-45 parts of white carbon black, 0.5-4.0 parts of graphene material, 1-4 parts of silicone oil and 0.5-1.5 parts of bridging agent.
3. The modified silica gel article of claim 2, comprising, in parts by weight: 55-60 parts of silica gel, 38-42 parts of white carbon black, 1-3 parts of graphene material, 1.5-2.5 parts of silicone oil and 1-1.5 parts of bridging agent.
4. The modified silica gel article of claim 1, wherein the graphene material having a particle size of less than 1 μ ι η and the graphene material having a particle size of 1-10 μ ι η are added in a weight ratio of 1: 1-5.
5. The modified silica gel article of claim 4, wherein the graphene material having a particle size of less than 1 μm and the graphene material having a particle size of 1 to 10 μm are added in a weight ratio of 1: 2-3.
6. The modified silica gel article of claim 1, wherein the graphene material comprises one or more of reduced graphene oxide, biomass graphene, and derivatives thereof.
7. The modified silica gel article of claim 6 wherein the graphene material is a graphene.
8. The modified silicone rubber product according to claim 1, wherein the silicone oil comprises one or a mixture of two or more of methyl silicone oil, ethyl silicone oil, vinyl silicone oil, methyl hydroxy silicone oil, high hydrogen-containing silicone oil, ethyl hydrogen-containing silicone oil, and hydroxy hydrogen-containing silicone oil.
9. The modified silica gel article of claim 1 wherein the bridging agent comprises one or a mixture of two or more of benzoyl peroxide, 2, 4-dichlorobenzoyl peroxide, di-t-butyl peroxide, and ethyl orthosilicate.
10. The modified silica gel article of claim 1 wherein the silica gel is a food grade silica gel.
11. The modified silica gel article of claim 1, wherein the silica is prepared by a precipitation process.
12. The modified silica gel article of any one of claims 1 to 11 wherein the modified silica gel article comprises a mask, a mask cover, a nasal mask, tubing, a keyboard.
13. The modified silica gel article of claim 1 wherein step (a) is: firstly, mixing white carbon black and a graphene material with the particle size smaller than 1 mu m, then adding silica gel, a bridging agent and silicone oil, and uniformly mixing to obtain the first mixture.
14. The modified silica gel article of claim 13, wherein in step (a), the graphene material having a particle size of less than 1 μm is mixed with the other components in a batch, and each time the graphene material is mixed, the component containing the graphene material is not more than 10 times the mass of the component not containing the graphene material.
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| IT201800006990A1 (en) * | 2018-07-06 | 2020-01-06 | Multi-active compositions in long-lasting antiaging make-up containing graphene | |
| CN110041706A (en) * | 2019-04-28 | 2019-07-23 | 张慧 | Terahertz silica gel material |
| CN110003660A (en) * | 2019-04-28 | 2019-07-12 | 张慧 | A kind of Terahertz material silica gel composite and preparation method thereof |
| CN111484743A (en) * | 2020-05-18 | 2020-08-04 | 辽宁格莱菲尔健康科技有限公司 | Graphene two-component liquid silica gel and preparation method and application thereof |
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