阅读说明：本技术 一种双层涂层柔性热防护材料产品及其制备方法 (Double-layer coating flexible thermal protection material product and preparation method thereof ) 是由 赵晓明 刘国熠 谌玉红 刘元军 于 2020-06-05 设计创作，主要内容包括：本发明公开了一种双层涂层柔性热防护材料产品及其制备方法,该类柔性热防护材料包括隔热涂层和耐烧蚀反射涂层,涂层基布为连续玄武岩纤维织物。采用所公开的双层涂层柔性热防护材料的制备方法所制备出的材料兼具耐明火、反射热辐射和高效隔热等功能。该产品的制备工艺分为两步：(1)隔热涂层的制备。在低速搅拌条件下,向树脂中加入溶剂并充分溶解,加入一定质量分数的气凝胶等隔热功能填料,并加入偶联剂。加料完毕后,在高速搅拌的条件下,使填料充分分散于所制备涂层剂中,在搅拌结束前加入一定量的消泡剂。在设定电动涂层机涂覆速度和涂层厚度后在基布背面进行涂覆,烘干后保存；(2)耐烧蚀反射层的制备。与步骤(1)制备工艺相似,在溶解后的树脂中加入纳米级二氧化硅、纳米级六钛酸钾晶须等辐射热反射填料和耐明火填料,经规定时间的高速搅拌,制备出耐烧蚀反射涂层剂,在基布的正面进行涂覆。在规定温度和时间的条件下,对所制备材料实施固化。至此,双层涂层柔性热防护材料制备完毕。(The invention discloses a double-layer coating flexible thermal protection material product and a preparation method thereof. The material prepared by the preparation method of the double-layer coating flexible thermal protection material has the functions of open fire resistance, heat radiation reflection, high-efficiency heat insulation and the like. The preparation process of the product comprises two steps: (1) and (4) preparing the thermal insulation coating. Under the condition of low-speed stirring, adding a solvent into the resin, fully dissolving, adding aerogel and other heat-insulating functional fillers with certain mass fraction, and adding a coupling agent. After the feeding is finished, the filler is fully dispersed in the prepared coating agent under the condition of high-speed stirring, and a certain amount of defoaming agent is added before the stirring is finished. Coating the back of the base cloth after setting the coating speed and the coating thickness of the electric coating machine, and storing after drying; (2) and preparing an ablation-resistant reflecting layer. Similar to the preparation process in the step (1), the dissolved resin is added with radiant heat reflection fillers and open fire resistant fillers such as nano-silicon dioxide, nano-potassium hexatitanate whiskers and the like, and the mixture is stirred at a high speed for a specified time to prepare the ablation resistant reflection coating agent which is coated on the front surface of the base fabric. Curing the prepared material under the conditions of specified temperature and time. Thus, the preparation of the double-layer coating flexible thermal protection material is finished.)

1. A dual layer coated flexible thermal protective material product comprising: the continuous basalt fiber fabric used as a base material and the organic silicon resin used as a coating matrix are subjected to a double-layer coating process by adding different types of functional fillers into the organic silicon resin, and are cured and molded at a high temperature to prepare the flexible protective material product.

2. The dual-layer coating flexible protective material product of claim 1, wherein the mass ratio of the silicone resin to the coupling agent is 50-250: 1.

3. The dual-layer coated flexible protective material of claim 2, wherein the coupling agent is at least one of a borate coupling agent, a bimetallic coupling agent, a silane coupling agent, and a titanate coupling agent.

4. The double-coated flexible protective material product of claim 1, wherein said continuous basalt fiber fabric is cut into a test specimen of 15cm × 40cm corresponding to the amount of silicone resin of 32-50 g.

5. The double-layer coating flexible protective material product as claimed in claim 1, wherein absolute ethyl alcohol with the mass of 2-30m L is added into the silicone resin for dilution.

6. A double coated flexible protective material product as claimed in claim 1, wherein the thickness is less than 1 mm.

7. A double coated flexible protective material product according to claim 1, comprising the steps of:

step 1 thermal insulation coating preparation process

Preferably, the continuous basalt fiber fabric is cut into a sample of 15cm × 40cm, and the dosage of the corresponding silicone resin is 32-50 g.

Preferably, the mass ratio of the organic silicon resin to the coupling agent is 50-250: 1.

Preferably, the coupling agent is at least one of a borate coupling agent, a bimetallic coupling agent, a silane coupling agent and a titanate coupling agent.

Preferably, absolute ethyl alcohol with the mass of 2-30m L is added into the organic silicon resin to dilute the organic silicon resin.

The thermal insulation coating agent comprises the following components in percentage by mass:

aerogel: 5-19%;

mica powder: 2-14%;

kaolin: 0.5-10%;

talc powder: 1 to 11 percent

Preferably, the thickness of the coating is 0.1-2 mm.

Preferably, after the back of the fabric is coated by using a sample coating machine, the fabric is placed into an oven to be dried for 30-60 min at the temperature of 50-150 ℃.

Step 2 ablation-resistant reflective coating preparation process

Preferably, the dosage of the organic silicon resin is 26-40 g.

Preferably, the mass ratio of the organic silicon resin to the coupling agent is 80-200: 1.

Preferably, the coupling agent is at least one of a borate coupling agent, a bimetallic coupling agent, a silane coupling agent and a titanate coupling agent.

Preferably, absolute ethyl alcohol with the mass of 2-38m L is added into the organic silicon resin to dilute the organic silicon resin.

The thermal insulation coating agent comprises the following components in percentage by mass:

nano-scale silica: 3-16%;

nano-scale potassium hexatitanate whiskers: 5-20%;

mica powder: 3-13%;

kaolin: 2-10%;

talc powder: 2 to 5 percent

Preferably, the thickness of the coating is 0.1-2 mm.

Preferably, after the front surface of the fabric is coated by using a sample coating machine, the fabric is placed into an oven to be dried for 30-60 min at the temperature of 50-150 ℃, and then the temperature is raised to 180-250 ℃ to be dried for 60-120 min.

Technical Field

The invention relates to a thermal protection composite material product, in particular to a double-layer coating flexible protection material product with good thermal protection performance and a preparation method thereof, wherein the double-layer coating flexible protection material product takes a continuous basalt fiber fabric as a base material and organic silicon resin as a matrix.

Background

Composite materials are multiphase materials prepared from two or more materials with different properties, such as metals, ceramics, high molecular materials and the like, by physical or chemical preparation processes. The various materials composing the composite material are complementary in performance and characteristics, make up for deficiencies and generate synergistic effect, so that the comprehensive performance of the composite material is superior to that of the original composite material, and various different requirements in daily life and industrial production are met. The composite material has the characteristics of light weight, high strength, convenient processing and forming, excellent elasticity, chemical corrosion resistance, good weather resistance and the like, gradually replaces wood and metal alloy, is widely applied to the fields of aerospace, automobiles, electronics and electrical, buildings, body building equipment and the like, and is developed rapidly in recent years.

Coated fabrics (Coated fabrics) belong to the class of composite materials, which are textiles with a coating binder material forming a single or multiple layer coating in situ on one or both the front and back sides of the fabric. Consisting of two or more layers of material, at least one of which is a textile and the other layer or layers being a fully continuous polymer coating. The product has the advantages of both. In addition, from a microscopic perspective, the coating on the fabric can be viewed as a space in which substances having specific functions but not reacting with the fibers to be fixed can be accommodated, so that the application range of the textile can be expanded, the traditional field is not limited, and the combination of one or more functions can be realized through the method.

In a high-temperature fire field, heat flow generated by an open fire source is mostly transmitted to the periphery in the form of electromagnetic waves, and the peak value of heat flow generated by flame is concentrated at 167-226 kW.m^-2Within the range, the wave crest is about 2 μm, and the wavelength range is 1-6 μm. This indicates that the radiant heat generated in the open flame environment is mostly electromagnetic waves in the near infrared region. In a common fire, the radiation wavelength range of a fire source is 2-20 mu m, visible light (0.4-0.8 mu m) also generates a heat effect in a high-temperature open fire scene, therefore, in the high-temperature fire scene, the wavelength range of radiation which can be absorbed and generates the heat effect is 0.4-20 mu m, which is called as heat rays, and the heat radiation effect generated by the heat rays accounts for 80% of the total heat flow of the high-temperature fire scene, therefore, the radiation heat reflection performance of the coating-enhanced flexible composite material is a main way for improving the heat protection efficiency of the coating fabric in the fire scene.

Disclosure of Invention

The invention solves the technical problem of providing a continuous basalt fiber fabric/organic silicon resin double-layer coating flexible protective material product which takes a continuous basalt fiber fabric as a base material and organic silicon resin as a matrix and has good thermal protective performance in a high-temperature fire scene, and the continuous basalt fiber fabric/organic silicon resin double-layer coating flexible protective material product can be used as an outer layer material of fire-fighting fire-protection clothes. Meanwhile, the fabric material has ablation resistance, radiant heat reflection and heat insulation functions simultaneously by adopting a double-layer coating mode, and the problem of low utilization rate caused by high price of the traditional thermal protection fabric for the high-temperature fire field is solved by adopting the continuous basalt fiber fabric with low price to replace the high-silica glass fiber fabric with high price.

The invention provides a technical scheme for solving the problems, and provides a continuous basalt fiber fabric/silicone resin double-layer coating flexible composite material product, which comprises the following components in percentage by weight: the continuous basalt fiber fabric used as a base material and the organic silicon resin used as a coating matrix are subjected to a double-layer coating process by adding different types of functional fillers into the organic silicon resin, and are cured and molded at a high temperature to prepare the flexible protective material product.

1. A double-layer coating flexible protective material product process parameter is characterized by comprising the following steps:

step 1 thermal insulation coating preparation process

Preferably, the continuous basalt fiber fabric is cut into a sample of 15cm × 40cm, and the dosage of the corresponding silicone resin is 32-50 g.

Preferably, the mass ratio of the organic silicon resin to the coupling agent is 50-250: 1.

Preferably, the coupling agent is at least one of a borate coupling agent, a bimetallic coupling agent, a silane coupling agent and a titanate coupling agent.

Preferably, absolute ethyl alcohol with the mass of 2-30m L is added into the organic silicon resin to dilute the organic silicon resin.

The thermal insulation coating agent comprises the following components in percentage by mass:

aerogel: 5-19%;

mica powder: 2-14%;

kaolin: 0.5-10%;

talc powder: 1 to 11 percent

Preferably, the thickness of the coating is 0.1-2 mm.

Preferably, after the back of the fabric is coated by using a sample coating machine, the fabric is placed into an oven to be dried for 30-60 min at the temperature of 50-150 ℃.

Step 2 ablation-resistant reflective coating preparation process

Preferably, the dosage of the organic silicon resin is 26-40 g.

Preferably, the mass ratio of the organic silicon resin to the coupling agent is 80-200: 1.

Preferably, the coupling agent is at least one of a borate coupling agent, a bimetallic coupling agent, a silane coupling agent and a titanate coupling agent.

Preferably, absolute ethyl alcohol with the mass of 2-38m L is added into the organic silicon resin to dilute the organic silicon resin.

The thermal insulation coating agent comprises the following components in percentage by mass:

nano-scale silica: 3-16%;

nano-scale potassium hexatitanate whiskers: 5-20%;

mica powder: 3-13%;

kaolin: 2-10%;

talc powder: 2 to 5 percent

Preferably, the thickness of the coating is 0.1-2 mm.

Preferably, after the front surface of the fabric is coated by using a sample coating machine, the fabric is placed into an oven to be dried for 30-60 min at the temperature of 50-150 ℃,

then, the temperature is increased to 180-250 ℃ at the temperature, and the mixture is dried for 60-120 min.

The invention also provides a preparation method of the coating agent for the continuous basalt fiber fabric/organic silicon resin double-layer coating flexible protective material product, which comprises the following steps:

(1) preparation of the coating agent:

and adding the nano-filler into the alcohol according to the proportion, uniformly stirring, and then carrying out ultrasonic treatment for 10-20 min to remove the agglomeration phenomenon among the nano-fillers. Setting the rotating speed of a dispersion machine to be 100-500 r/min, slowly adding the nano filler into the resin, then adding other fillers, after the addition is finished, adjusting the rotating speed of the dispersion machine to be 1500-3000 r/min, stirring at a constant speed for 20-30 min, then adding the coupling agent, and stirring for 2-5 min.

(2) Implementation of the coating process:

and fixing the cut fabric on a needle board frame, adjusting the distance between a scraper and the fabric to a specified value, and reducing the scraping speed of the sample coating machine to be below 1-10 mm/s to implement uniform scraping.

(3) And (3) implementation of a drying film forming process:

after the application process of the thermal barrier coating is completed, pre-baking is required to be performed. After the application process of the ablation-resistant reflective coating is finished, the pre-baking is required to be carried out firstly, and then the high-temperature curing process is carried out.

The technical scheme of the invention is summarized as follows:

taking organic silicon resin as a matrix of the flexible protective material product; because the organic silicon resin has certain viscosity, the absolute ethyl alcohol is added into the resin for dilution, thereby facilitating the implementation of the subsequent filler dispersion and coating process; the continuous basalt fiber woven fabric is used as a reinforcement, and the heat resistance of the continuous basalt fiber woven fabric has obvious influence on the high-temperature thermal stability of the flexible protective material product; the basalt fiber fabric is sequentially subjected to heat insulation coating and ablation-resistant reflective coating, the inorganic functional filler is added into the functional layers with different structures according to a certain proportion, and the functional layers are dried at the curing temperature for a set time and then molded, so that the compounding of multiple heat protection effects of ablation resistance, heat reflection, heat insulation and the like of the material is realized, and the double-layer flexible protection material product is prepared.

The invention has the following beneficial effects:

the continuous basalt fiber fabric is used as the matrix of the double-layer flexible protective material product, and has excellent high-temperature thermal stability and good mechanical property. By utilizing the characteristics of the continuous basalt fiber fabric and adopting a simple and feasible double-layer coating method, the filler with corresponding functions is mixed into the organic silicon resin, the double-layer functional coating is carried out on the continuous basalt fiber fabric, and the continuous basalt fiber fabric is formed after the resin is cured at the film forming temperature. The product of the invention has the thickness of only about 1mm, is very light and thin, but has excellent thermal protection performance, simple preparation method, easy operation and lower cost.

Drawings

FIG. 1 is a flow chart of the preparation of the composite material of the present invention;

FIG. 2 is a schematic view of a model structure of the composite material of the present invention;

FIG. 3 effect of coating process on ablation resistance of a dual-layer coated flexible composite;

FIG. 4 is a graph of the effect of the coating process on the ablation platform temperature resistance of a two-layer coated flexible composite.

Detailed Description

The invention is further described by the following specific embodiments in conjunction with the accompanying drawings. Unless otherwise specified, technical means not described in the embodiments may be implemented in a manner well known to those skilled in the art. In addition, the embodiments should be considered illustrative, and not restrictive, of the scope of the invention, which is defined solely by the claims. It will be apparent to those skilled in the art that various modifications, substitutions, and improvements in the materials, amounts, dimensions, and shapes of the embodiments disclosed herein may be made without departing from the spirit and scope of the invention, and the invention is to be limited only by the specific parameters set forth herein as the scope of the invention is to be determined with the permissible error.