CN115321953A - Inorganic non-metal moisture absorption sterilization material and preparation method thereof - Google Patents

Inorganic non-metal moisture absorption sterilization material and preparation method thereof Download PDF

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CN115321953A
CN115321953A CN202110506121.3A CN202110506121A CN115321953A CN 115321953 A CN115321953 A CN 115321953A CN 202110506121 A CN202110506121 A CN 202110506121A CN 115321953 A CN115321953 A CN 115321953A
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raw material
binder
powder
mass
inorganic non
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黄富强
乔经纬
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Shanghai Institute of Ceramics of CAS
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Shanghai Institute of Ceramics of CAS
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Abstract

The invention relates to an inorganic nonmetal moisture absorption sterilization material and a preparation method thereof. The preparation method is a colloidal state forming method, and comprises the following steps: mixing and stirring the mixed raw material powder and the organic plasticizer under the heating condition to prepare colloidal forming slurry; putting the slurry into an injection molding machine, and performing injection molding to obtain a green body; placing the molded green body in an inorganic filler for degreasing and sintering to obtain the inorganic non-metal moisture absorption sterilization material; the raw material powder comprises a supporting material, a functional material and a binder; the support material is at least one of slag, diatomite, calcium oxide, vermiculite, alumina, montmorillonite and perlite, the functional material is an inorganic non-metallic material with catalytic activity, and the binder is at least one of low-melting-point glass powder and sodium silicate.

Description

Inorganic non-metal moisture absorption sterilization material and preparation method thereof
Technical Field
The invention relates to an inorganic non-metal moisture absorption sterilization material and a preparation method thereof, belonging to the field of forming of inorganic non-metal materials, in particular to the field of preparation and application of inorganic non-metal porous materials.
Background
Along with the improvement of living standard of people, higher requirements are put forward on household moisture absorption materials such as bathroom foot pads, the household moisture absorption materials which are most used at present are organic fiber materials, and the materials have strong water absorption capacity, but are not resistant to dirt, are easy to breed bacteria and mites, are inconvenient to clean and have short service life. The inorganic non-metal porous material has the advantages of corrosion resistance, long service life, environmental friendliness and the like, is widely applied in the field of household moisture absorption, and most of the inorganic non-metal moisture absorption products in the current market have simple shapes and single functions due to the forming process, so that the application of the inorganic non-metal material is greatly limited.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide an inorganic non-metallic hygroscopic and bactericidal material which is shaped or has surface texture, and a method for preparing the same.
In a first aspect, the present invention provides a method for preparing an inorganic non-metallic hygroscopic and bactericidal material, wherein the method is a colloidal state forming method, and comprises: mixing and stirring the mixed raw material powder and the organic plasticizer under the heating condition to prepare colloidal forming slurry; putting the slurry into an injection molding machine, and performing injection molding to obtain a green body; placing the molded green body in an inorganic filler for degreasing and sintering to obtain the inorganic nonmetal moisture absorption sterilization material; the raw material powder comprises a supporting material, a functional material and a binder; the support material is at least one of slag, diatomite, calcium oxide, vermiculite, alumina, montmorillonite and perlite; the functional material is an inorganic non-metallic material with catalytic activity; the binder is at least one of low-melting-point glass powder and sodium silicate.
The traditional forming method can only produce simple sheet products at present, and the special shapes are as follows: the surface is provided with radians, branches, grooves or various shapes according to the requirements of customers; the realization way of the special shape in the patent is injection molding; through the specific operations in the patent, mainly the steps of mixing, injecting, sintering and the like, the sterilizing materials can be naturally embedded into the porous ceramic body. The surface texturing of the material is achieved by means of a mould.
The support body material is a porous material or an easily sintered material, and has high porosity, so that the product has good moisture absorption performance and strength. The main purpose of bonding is to bond the support materials together, thereby not only endowing the product with strength, but also constructing a relatively complete three-dimensional space structure so as to coat the functional material with bactericidal activity.
The preparation method provides a process capable of quickly preparing the special-shaped moisture-absorbing sterilizing material, has simple steps and high automation degree, and is suitable for large-scale production. Meanwhile, the novel sterilization functional material is creatively embedded into the porous ceramic matrix, so that the application field of the modified material is widened.
Preferably, the mass fraction of the support material is 60wt% -80 wt%, preferably 65wt% -80 wt% of the total mass of the raw material powder; the mass fraction of the functional material is 1wt% -10 wt% of the total mass of the raw material powder, and the mass fraction of the binder is 15wt% -30 wt% of the total mass of the raw material powder. Wherein, the low content of the supporting material and the high content of the binder lead to low porosity of the product and low water absorption, and the functional material can be coated by the binder and can not exert the effect; if the support material content is high and the binder content is low, the mechanical properties of the material will be reduced, thereby greatly reducing the usability of the material.
Preferably, the particle size of the support material is 1-200 μm, and the particle size of the binder is 0.1-60 μm. The particle size is beneficial to powder molding.
Preferably, the inorganic non-metallic material (bactericidal material) with catalytic activity is at least one of nano titanium oxide, nano iron oxide and nano zinc oxide.
Preferably, the raw material powder is mixed in a vertical three-dimensional mixer or a V-shaped mixer, and the mixing time is 1-6 h. The above mixing mode is favorable for fully and uniformly mixing the components of the raw materials.
Preferably, the organic plasticizer consists of a dispersant, a lubricant and a binder, wherein the dispersant is at least one of stearic acid, oleic acid, silane and butyl titanate, and the mass of the dispersant accounts for 1-10 wt% of the mass of the organic plasticizer; the lubricant is at least one of paraffin, beeswax and polyethylene glycol, and the weight of the lubricant accounts for 70-90 wt% of that of the organic plasticizer; the binder is at least one of polyethylene, polypropylene and PMMA, and accounts for 5-10 wt% of the mass of the plasticizer.
Preferably, the raw material powder and the organic plasticizer are mixed for 2 to 12 hours at the temperature of between 80 and 200 ℃ to prepare the colloidal molding slurry; wherein the raw material powder accounts for 50-85 wt% of the total mass of the slurry, and the slurry has good fluidity.
Preferably, the injection temperature of the slurry is 75-195 ℃, and the injection pressure is 0.5-20 Mpa.
Preferably, the inorganic filler is at least one of cristobalite, corundum powder and kaolin, and the sintering temperature is 450-1100 ℃.
In a second aspect, the invention provides the inorganic non-metal moisture absorption sterilization material obtained by the preparation method, wherein the inorganic non-metal moisture absorption sterilization material is specially-shaped or has surface texture. Wherein the dysmorphism includes: the surface is provided with a radian, a branch shape, a groove or various shapes according to the requirements of customers. The way of realizing the special shape in the patent is injection molding.
Preferably, the inorganic nonmetal moisture-absorbing sterilizing material has the porosity of more than 50 percent and the water absorption of 25 to 35 percent, and the moisture-absorbing product is dried in the sun, so that the sterilizing rate of the moisture-absorbing product on escherichia coli, candida albicans and staphylococcus aureus is more than 85 percent, the compressive strength is 15 to 60MPa, and the household use requirement can be met.
Has the advantages that:
1. the material has the beneficial effects that: strong water absorption, easy cleaning and environment protection of inorganic non-metallic materials;
2. the preparation method has the beneficial effects that: the injection molding efficiency is high, the mixed materials are uniform, the product quality is good, and a mold can be used for preparing products with complex shapes.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. It is to be understood that the following examples are illustrative of the invention, and are not limiting thereof.
The following exemplary description is provided for a method for preparing an inorganic non-metallic hygroscopic sterilization material, the method comprising:
preparing raw material powder. The raw material powder comprises a supporting material, a functional material and a binder. The mass fraction of the supporting material can be 60wt% -80 wt%, preferably 65wt% -80 wt% of the total mass of the raw material powder. The slag-like composite material comprises at least one of slag, diatomite, calcium oxide, vermiculite, alumina, montmorillonite and perlite, and the particle size of the slag-like composite material is 1-200 mu m. The mass fraction of the functional material is 1-10 wt% of the total mass of the raw material powder, and the functional material comprises inorganic nonmetallic materials with catalytic activity, such as nano titanium oxide, nano iron oxide, nano zinc oxide and the like; the mass fraction of the binder is 15wt% -30 wt% of the total mass of the raw material powder, the binder comprises at least one of low-melting-point glass powder and sodium silicate, and the particle size of the binder is 0.1-60 mu m.
Mixing the raw material powder in a mixer. And mixing the support material, the functional material and the binder for 1-6 hours by using a three-dimensional vertical mixer and a V-shaped mixer.
And preparing colloidal molding slurry with better fluidity. Mixing the mixed powder and the organic plasticizer at the temperature of 80-200 ℃ for 2-12 hours to obtain colloidal state forming slurry, wherein the raw material powder accounts for 50-85 wt% of the total mass of the slurry. The organic plasticizer consists of a dispersant, a lubricant and a binder, wherein the dispersant is at least one of stearic acid, oleic acid, silane and butyl titanate, and the mass of the dispersant accounts for 1-10 wt% of that of the organic plasticizer; the lubricant is at least one of paraffin, beeswax, polyethylene glycol and polyethylene wax, and the mass of the lubricant accounts for 70-90 wt% of that of the organic plasticizer; the adhesive is at least one of polyethylene, polypropylene and PMMA, and accounts for 5-10 wt% of the mass of the plasticizer.
And injection molding to obtain the green body. And (3) putting the slurry into an injection molding machine, setting the injection temperature of the slurry to be 75-195 ℃ and the injection pressure to be 0.5-20 Mpa, and obtaining an injection molded green body.
And (5) degreasing and sintering. And (2) putting the molded green body into an inorganic filler for degreasing and sintering, wherein the inorganic filler is at least one of cristobalite, corundum powder and kaolin, and the sintering temperature is 450-1100 ℃.
The present invention will be described in detail by way of examples. It is also to be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the invention, and that certain insubstantial modifications and adaptations of the invention by those skilled in the art based on the foregoing description are intended to be within the scope of the invention. The specific process parameters and the like of the following examples are also merely examples of suitable ranges, i.e., those skilled in the art can select from the suitable ranges through the description herein, and are not limited to the specific values exemplified below.
Example 1
Preparing raw material powder. The raw material powder comprises a supporting material, a functional material and a binder. The weight percentage of the supporting material is 77wt% of the total weight of the raw material powder, and the supporting material comprises slag, diatomite and calcium oxide, and the grain diameter of the supporting material is 1-200 mu m. The mass fraction of the functional material is 3wt% of the total mass of the raw material powder, and the functional material comprises an inorganic non-metallic material with catalytic activity and nano titanium oxide; the mass fraction of the binder is 20wt% of the total mass of the raw material powder, the binder comprises at least one of low-melting-point glass powder and sodium silicate, and the particle size of the binder is 0.1-60 mu m.
Mixing the raw material powder in a mixer. The support material, the functional material and the binder were mixed for 6 hours using a three-dimensional vertical mixer and a V-type mixer.
And mixing the mixed powder and the organic plasticizer for 10 hours at the temperature of 120 ℃ to obtain colloidal forming slurry, wherein the raw material powder accounts for 80wt% of the total mass of the slurry. The organic plasticizer consists of a dispersing agent, a lubricating agent and a binding agent, wherein the dispersing agent is stearic acid, and the mass of the dispersing agent accounts for 3wt% of that of the organic plasticizer; the lubricant is paraffin wax, and the mass of the lubricant accounts for 90wt% of that of the organic plasticizer; the adhesive is polyethylene, and accounts for 7wt% of the mass of the plasticizer.
And injection molding to obtain the green body. And (3) putting the slurry into an injection molding machine, setting the injection temperature of the slurry to be 120 ℃, and setting the injection pressure to be 4.0Mpa, thus obtaining an injection molded green body.
And (5) degreasing and sintering. And (3) degreasing and sintering the molded green body in an inorganic filler, wherein the inorganic filler is kaolin, and the sintering temperature is 1050 ℃.
The obtained inorganic nonmetal moisture absorption sterilization material has the porosity of 33 percent, the water absorption of 18 percent by weight, the sterilization rate on escherichia coli, candida albicans and staphylococcus aureus of more than 85 percent and the compressive strength of 15MPa.
Example 2
This example 2 differs from example 1 only in that: the mass fraction of the supporting material is 60wt% of the total mass of the raw material powder. The mass fraction of the functional material is 10wt% of the total mass of the raw material powder; the mass fraction of the binder is 30wt% of the total mass of the raw material powder.
The obtained inorganic nonmetal moisture absorption sterilization material has the porosity of 28 percent, the water absorption of 15 percent by weight, the sterilization rate of over 75 percent on escherichia coli, candida albicans and staphylococcus aureus and the compressive strength of 20MPa.
Example 3
The difference between the embodiment 3 and the embodiment 1 is only that: the mass fraction of the supporting material is 67wt% of the total mass of the raw material powder. The mass fraction of the functional material is 3wt% of the total mass of the raw material powder; the mass fraction of the binder is 30wt% of the total mass of the raw material powder.
The obtained inorganic nonmetal moisture absorption sterilization material has the porosity of 30 percent, the water absorption rate of 16.3 percent by weight, the sterilization rate on escherichia coli, candida albicans and staphylococcus aureus of more than 80 percent and the compressive strength of 18MPa.

Claims (10)

1. The preparation method of the inorganic non-metal moisture absorption sterilization material is characterized by being a colloidal state forming method and comprising the following steps:
mixing and stirring the mixed raw material powder and the organic plasticizer under the heating condition to prepare colloidal forming slurry;
putting the slurry into an injection molding machine, and performing injection molding to obtain a green body;
placing the molded green body in an inorganic filler for degreasing and sintering to obtain the inorganic non-metal moisture absorption sterilization material;
the raw material powder comprises a supporting material, a functional material and a binder;
the support material is at least one of slag, diatomite, calcium oxide, vermiculite, alumina, montmorillonite and perlite, the functional material is an inorganic non-metallic material with catalytic activity, and the binder is at least one of low-melting-point glass powder and sodium silicate.
2. The preparation method according to claim 1, wherein the mass fraction of the supporting material is 60wt% -80 wt%, preferably 65wt% -80 wt% of the total mass of the raw material powder; the mass fraction of the functional material is 1wt% -10 wt% of the total mass of the raw material powder, and the mass fraction of the binder is 15wt% -30 wt% of the total mass of the raw material powder.
3. The production method according to claim 1 or 2, wherein the particle size of the support material is 1 μm to 200 μm, and the particle size of the binder is 0.1 μm to 60 μm.
4. The method according to any one of claims 1 to 3, wherein the inorganic non-metallic material having catalytic activity is at least one of nano titanium oxide, nano iron oxide and nano zinc oxide.
5. The production method according to any one of claims 1 to 4, wherein the raw material powder is mixed in a vertical three-dimensional mixer or a V-type mixer for 1 to 6 hours.
6. The preparation method according to any one of claims 1 to 5, wherein the organic plasticizer is composed of a dispersant, a lubricant and a binder, the dispersant is at least one of stearic acid, oleic acid, silane and butyl titanate, and the mass of the dispersant accounts for 1 to 10 weight percent of the mass of the organic plasticizer; the lubricant is at least one of paraffin, beeswax, polyethylene glycol and polyethylene wax, and the mass of the lubricant accounts for 70-90 wt% of that of the organic plasticizer; the adhesive is at least one of polyethylene, polypropylene and PMMA, and accounts for 5-10 wt% of the mass of the plasticizer.
7. The method according to any one of claims 1 to 6, wherein the raw material powder and the organic plasticizer are mixed at 80 ℃ to 200 ℃ for 2 to 12 hours to prepare a colloidal molding slurry; wherein the raw material powder accounts for 50-85 wt% of the total mass of the slurry.
8. The method according to any one of claims 1 to 7, wherein the slurry is injected at a temperature of 75 ℃ to 195 ℃ and an injection pressure of 0.5 to 20MPa.
9. The method according to any one of claims 1 to 8, wherein the inorganic filler is at least one of cristobalite, corundum powder and kaolin, and the sintering temperature is 450 to 1100 ℃.
10. An inorganic non-metallic moisture-absorbing and sterilizing material obtained by the preparation method according to any one of claims 1 to 9, wherein the inorganic non-metallic moisture-absorbing and sterilizing material is specially shaped or has surface texture; preferably, the inorganic nonmetal moisture-absorption sterilizing material has the porosity of more than 50 percent, the water absorption of 25 to 35 percent, the sterilizing rate on escherichia coli, candida albicans and staphylococcus aureus of more than 85 percent and the compressive strength of 15 to 60MPa.
CN202110506121.3A 2021-05-10 2021-05-10 Inorganic non-metal moisture absorption sterilization material and preparation method thereof Pending CN115321953A (en)

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Publication number Priority date Publication date Assignee Title
CN101643360A (en) * 2009-09-02 2010-02-10 清华大学 Method for manufacturing dentate special-shaped ceramic components by injection molding
CN106242455A (en) * 2016-08-09 2016-12-21 盐城市绿之韵环保建材有限公司 A kind of composite multi-functional meerschaum/kieselguhr basic ring protects chamber interior walls material
CN106882960A (en) * 2015-12-16 2017-06-23 营口渤海科技有限公司 A kind of preparation method of diatomite vegetarian noodles brick
CN108569911A (en) * 2017-03-10 2018-09-25 上海大学 A kind of building waste residue breathing brick of high damping and preparation method thereof
CN112047753A (en) * 2020-08-21 2020-12-08 深圳市沁园春科技有限公司 Porous ceramic and preparation method and application thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101643360A (en) * 2009-09-02 2010-02-10 清华大学 Method for manufacturing dentate special-shaped ceramic components by injection molding
CN106882960A (en) * 2015-12-16 2017-06-23 营口渤海科技有限公司 A kind of preparation method of diatomite vegetarian noodles brick
CN106242455A (en) * 2016-08-09 2016-12-21 盐城市绿之韵环保建材有限公司 A kind of composite multi-functional meerschaum/kieselguhr basic ring protects chamber interior walls material
CN108569911A (en) * 2017-03-10 2018-09-25 上海大学 A kind of building waste residue breathing brick of high damping and preparation method thereof
CN112047753A (en) * 2020-08-21 2020-12-08 深圳市沁园春科技有限公司 Porous ceramic and preparation method and application thereof

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