CN107382371B

CN107382371B - Modifier and preparation method thereof

Info

Publication number: CN107382371B
Application number: CN201710729201.9A
Authority: CN
Inventors: 赵宏宇; 孙志光; 陈武军
Original assignee: Beijing Oriksson Energy Saving Environmental Protection Technology Co ltd
Current assignee: Beijing Oriksson Energy Saving Environmental Protection Technology Co ltd
Priority date: 2017-08-23
Filing date: 2017-08-23
Publication date: 2021-02-12
Anticipated expiration: 2037-08-23
Also published as: CN107382371A

Abstract

The invention discloses a rock wool material modifier, which contains organic silicate, inorganic silicate, silica sol and water. The invention also discloses a preparation method of the rock wool material modifier, which comprises the following steps: s1: preparing a mixed aqueous solution of an organic silicate and an inorganic silicate; s2: adding water and mixing; s3: the aqueous silica sol dispersion was added and mixed. The modifier and the preparation method thereof have the advantages of low water absorption, high compressive strength, high surface strength, high tensile strength, low heat conductivity coefficient, no flying dust and flying floc, no pollution to construction environment and no harm to human skin, thereby greatly prolonging the service life of the used object.

Description

Modifier and preparation method thereof

Technical Field

The invention belongs to the field of new materials, and particularly relates to a modifier and a preparation method thereof.

Background

Silicate refers to a generic term for a compound in which silicon, oxygen and other chemical elements are combined. It is widely distributed in the crust and is the main constituent of most rocks and soils, whereas silicates are the main raw material for the silicate industry. Silicate products and materials are widely applied to various industries, scientific researches and daily life, most of the silicate products and materials in the market at present are inorganic silicates, and the application of the silicate to the materials is very wide, but the heat conductivity coefficient of the existing silicate modifier is high, and the silicate modifier is easy to damp, absorb moisture and expand, when the silicate modifier acts on the materials, the materials are easy to fall into powder and float into flocs, so that the construction environment has the hidden trouble of flying dust pollution, the defects of damage to human skin and the like, and the engineering quality problems of hollowing, cracking, water seepage, falling off and the like of a heat insulation layer are easily caused after the silicate modifier is used in the construction.

Disclosure of Invention

Aiming at the situation, the technical problem to be solved by the invention is to provide a modifier which can reduce the water absorption of the material, has low thermal conductivity, high adhesion degree and small pulling resistance and pollution, and a preparation method thereof.

In order to achieve the purpose, the invention provides the following technical scheme: the modifier is prepared by the following components in percentage by mass: 10 to 20 percent of organic silicate, 20 to 30 percent of soluble silicate, 10 to 20 percent of silicon dioxide hydrosol, 0.2 to 1.0 percent of aerogel, 30 to 60 percent of water and 0.1 to 1.0 percent of graphene.

The modifier and the preparation method thereof are prepared by mixing the materials

Preferably, it also contains aerogel.

Preferably, the organic silicate accounts for 1-15 wt%, the inorganic silicate accounts for 1-30 wt%, the silica sol accounts for 1-15 wt%, the aerogel accounts for 0-10 wt%, and the balance is water.

Preferably, the organosilicate is an organosilicate that is uniformly dispersible in water.

Preferably, the inorganic silicate is an inorganic silicate which can be uniformly dispersed in water.

Preferably, the aerogel is an aerogel that is uniformly dispersible in water.

Preferably, the preparation method of the rock wool material modifier comprises the following steps:

s1: preparing a mixed aqueous solution of an organic silicate and an inorganic silicate;

s2: adding water and mixing;

s3: the aqueous silica sol dispersion was added and mixed.

s2: adding aerogel, and mixing;

s3: adding water and mixing;

s4: the aqueous silica sol dispersion was added and mixed.

Preferably, the organic silicate is one of single-component sodium methyl silicate, silanol groups subjected to reaction dehydration and crosslinking or alkali metals or sodium and quartz sand of different components; the soluble silicate is one of single-component sodium silicate, synthetic aluminum silicate and hydrated aluminum silicate; the silica hydrosol is silica sol with water and hydroxyl components, which is formed by dispersing nanometer silica particles with the size of 8-15nm through a silane hydrolysis method, and the concentration range of the silica sol is 30-35%.

Preferably, the aerogel is a silica aerogel or sulfur aerogel having a density in the range of 10-3mg/cm 3.

Compared with the prior art, the invention has the advantages and beneficial effects that: the modifier is modified aiming at organosilicate, so that the modifier has a more efficient use effect, particularly after the modifier is prepared, the tolerance of the modifier is greatly improved, a very good effect is achieved when the modifier is mixed with a plate material, the compressive strength of the material can be obviously improved when the modifier is coated on industrial and even building materials, particularly brittle materials, the stability of the substructure of the transition region of each material of the modifier is greatly improved due to the addition of graphene, when the modifier is coated or added on a solid, a thin film with strong resistance to a vertical acting force can be formed on the solid, the crack generated when the material shrinks due to insufficient tolerance to the external environment can be effectively relieved due to the addition of silica sol, the aerogel is silica aerogel, and the propagation of local thermal excitation is effectively limited due to the fine nano network structure, the heat-conducting property of the invention is greatly reduced, therefore, the invention has the creativity of reduced water absorption, large compression strength, high surface strength, high tensile strength, small heat conductivity coefficient, no flying dust and floatage, no pollution to construction environment and no harm to human skin, thereby greatly prolonging the service life of the used object.

Detailed Description

In the following, in order to clearly and clearly understand the features, technical means and effects of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: the modifier is prepared by the following components in percentage by mass: 10 to 20 percent of organic silicate, 20 to 30 percent of soluble silicate, 10 to 20 percent of silicon dioxide hydrosol, 0.2 to 1.0 percent of aerogel, 30 to 60 percent of water and 0.1 to 1.0 percent of graphene.

Example 1

The invention relates to a modifier and a preparation method thereof, and the concrete components of the modifier comprise: the organosilicate is methyl sodium silicate, the soluble silicate is sodium silicate, the silica hydrosol is silica sol, the aerogel is silica aerogel, the water is sterile water, and the graphene is graphene dispersion liquid.

Example 2

The modifier is prepared by the following components in percentage by mass: 10% of organosilicate, 30% of soluble silicate, 20% of silica hydrosol, 0.6% of aerogel, 50% of water and 0.5% of graphene.

Example 3

The modifier is prepared by the following components in percentage by mass: 15% of organosilicate, 25% of soluble silicate, 15% of silica hydrosol, 0.8% of aerogel, 50% of water and 0.80% of graphene.

Embodiment 4 a modifier and a preparation method thereof, comprising the following components by mass percent: 18% of organosilicate, 20% of soluble silicate, 12% of silica hydrosol, 0.4% of aerogel, 40% of water and 0.3% of graphene.

Example 5

The invention relates to a modifier and a preparation method thereof, and the modifier comprises the following specific components in percentage by weight: weighing 15% of sodium methyl silicate and 25% of sodium silicate, uniformly dispersing in a stirring tank, performing mechanical stirring, after 10min of full mixing and stirring, gradually and naturally cooling and refluxing to form a stable mixed state, weighing 0.7% of aerogel, after 1500 r/min of high-speed stirring, mixing with a mixture obtained after stirring of the sodium methyl silicate and the sodium silicate, wherein the stirring time is 10min, killing or filtering microorganisms in water by using a physical filtration method, then weighing 44% of water into the stirring tank, then weighing disinfectant water into the stirring tank, then performing 1500 r/min of high-speed stirring for 5min, after completely mixing each additive, adding 15% of dispersed silica sol, wherein the concentration range of the silica sol is 30% -35%, adding the silica sol into the stirring tank, then placing 0.3% of graphene into the stirring tank, and then performing 1500 r/min of high-speed stirring for 10min, mixing to form the modifier.

Example 6

The invention relates to a 44 modifier and a preparation method thereof, and the concrete composition percentage of the invention comprises: weighing 10% of sodium methyl silicate and 20% of sodium silicate, uniformly dispersing in a stirring tank, mechanically stirring, gradually and naturally cooling and refluxing after 10min of full mixing and stirring to form a stable mixed state, weighing 0.2% of aerogel, gradually heating through 1500 r/min of high-speed stirring, mixing with a mixture obtained after stirring of the sodium methyl silicate and the sodium silicate at a high temperature for 10min, killing or filtering microorganisms in water by using a physical filtration method, then weighing 49% of cooled water in the stirring tank, then weighing disinfectant water, adding into the stirring tank, then stirring at 1500 r/min for 5min, using the cooled water in the process, keeping the stability in the stirring process at room temperature or low temperature, then waiting for each additive to be thoroughly mixed, adding 15% of dispersed silica sol, and the concentration range of the silica sol is 30-35%, 20% of the silica sol is added into a stirring tank, 0.8% of graphene is placed into the stirring tank, and then the graphene is stirred at a high speed of 1500 rpm for 10min and mixed to form the modifier.

The test data of the rock wool board modified by the modifier prepared by the method are as follows:

the present invention has been described in detail with reference to the specific embodiments and examples, but these are not intended to limit the present invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which should also be considered as within the scope of the present invention.

Claims

1. The rock wool material modifier is characterized in that: according to the mass percentage, the coating consists of 10 to 20 percent of organic silicate, 20 to 30 percent of soluble silicate, 10 to 20 percent of silicon dioxide hydrosol, 0.2 to 1.0 percent of aerogel, 0.1 to 1.0 percent of graphene and 30 to 60 percent of water;

the silica hydrosol is silica sol with water and hydroxyl components, which is formed by dispersing nanometer silica particles with the size of 8-15nm through a silane hydrolysis method, and the concentration range of the silica sol is 30-35%.

2. The rock wool material modifier of claim 1, wherein the organosilicate is an organosilicate that is uniformly dispersed in water.

3. The rock wool material modifier of claim 1, wherein said aerogel is an aerogel that is uniformly dispersed in water.

4. The rock wool material modifier as claimed in claim 1, wherein the organic silicate is one of single-component sodium methyl silicate and silanol group after reaction, dehydration and crosslinking.

5. The rock wool material modifier as claimed in claim 1, wherein the soluble silicate is one of single-component sodium silicate, synthetic aluminum silicate and hydrated aluminum silicate.

6. The rock wool material modifier of claim 1, wherein said aerogel is in a density range of 10-3mg/cm³Silica aerogel or sulfur aerogel.

7. The preparation method of the rock wool material modifier of any one of claims 1 to 6, characterized by comprising the following steps:

s1: preparing a mixed aqueous solution of an organosilicate and a soluble silicate;

s2: adding aerogel, and mixing;

s3: adding water and mixing;

s4: adding silica hydrosol and mixing;

s5: adding graphene and mixing.