阅读说明：本技术 一种石墨聚苯泡沫保护的轻质高强阻燃真空绝热板及其制备方法 (Light high-strength flame-retardant vacuum insulation panel protected by graphite polyphenyl foam and preparation method thereof ) 是由 陈照峰 吴琼 于 2019-08-28 设计创作，主要内容包括：本发明属于保温材料领域,具体涉及一种石墨聚苯泡沫保护轻质高强阻燃真空绝热板及其制备方法。以聚苯泡沫作为外保护层,增强了真空绝热板的抗穿刺能力,又以膨胀石墨改性聚苯泡沫,提高了其保温性能,同时在泡沫中添加无机纳米颗粒,提高了其力学性能与阻燃性能,而且泡沫中的玻璃纤维骨架增强了板材整体的强度。本发明石墨聚苯泡沫保护轻质高强度阻燃真空绝热板具有优异的保温绝热能力、抗穿刺能力和阻燃能力,在建筑保温领域具有广阔的应用前景。(the invention belongs to the field of heat insulation materials, and particularly relates to a graphite polyphenyl foam protection light high-strength flame-retardant vacuum heat-insulating plate and a preparation method thereof. The anti-puncture capability of the vacuum insulation panel is enhanced by taking the polyphenyl foam as an outer protective layer, the thermal insulation performance of the vacuum insulation panel is improved by modifying the polyphenyl foam with the expanded graphite, meanwhile, the mechanical property and the flame retardant property of the vacuum insulation panel are improved by adding the inorganic nano particles into the foam, and the integral strength of the panel is enhanced by the glass fiber framework in the foam. The graphite polyphenyl foam protective light high-strength flame-retardant vacuum heat-insulating plate has excellent heat-insulating capability, puncture resistance and flame-retardant capability, and has wide application prospect in the field of building heat insulation.)

1. the light high% ~ strength flame% ~ retardant vacuum heat% ~ insulating plate protected by graphite polystyrene foam is formed by coating graphite polystyrene foam on the outer layer of a vacuum heat% ~ insulating plate, and is characterized in that expanded graphite particles, nano reinforcing particles and a fiber reinforcing framework are added into a graphite polystyrene foam layer, wherein the volume fraction of the expanded graphite particles is 10% ~ 25%, the volume fraction of the nano reinforcing particles is 5% ~ 15%, and the volume fraction of the fiber reinforcing framework is 5% ~ 15%.

2. a preparation method of a light high-strength flame-retardant vacuum insulation panel protected by graphite polystyrene foam is characterized by comprising the following steps in sequence:

(1) surface activation is carried out on the expanded graphite particles and the reinforced nano particles by adopting a surfactant, wherein the surfactant is an amphoteric surfactant, and the using amount of the surfactant is ~ 1% of the mass of the resin;

(2) mixing polystyrene particles and expanded graphite particles, and pre-foaming to obtain a pre-foamed material, wherein the pre-foaming temperature is ~ 140 ℃;

(3) mixing the pre h ~ foaming material and the nano reinforced particles, and uniformly stirring at 90 h ~ 100 ℃ for 0.5h ~ 1 h;

(4) placing the fiber reinforced framework in an inert atmosphere for preheating treatment at the temperature of 80-150 ℃;

(5) horizontally placing the vacuum heat-insulating plate into a fiber reinforced framework, sleeving the vacuum heat-insulating plate into an open mold, adding a pre-foaming material into the mold, sealing a mold cavity, performing secondary foaming molding by using steam, demolding and cutting to obtain the light high-strength flame-retardant heat-insulating plate, wherein the foaming temperature is 80-100 ℃.

3. The method according to claim 1 and 2, wherein the fiber reinforced skeleton can be basalt fiber and glass fiber, and the nano-reinforcing particles are one of aluminum hydroxide, magnesium hydroxide or antimony trioxide.

4. the fiber reinforced plastic composite material of claims 1 and 2, wherein the surface of the fiber reinforced skeleton is provided with a resin protective film, and the resin is one of epoxy resin, phenolic resin or unsaturated polyester.

Technical Field

the invention belongs to the field of heat-insulating flame-retardant materials, and particularly relates to a light high-strength flame-retardant vacuum heat-insulating plate and a preparation method thereof.

background

In China, the energy consumption of buildings currently accounts for about one third of the total energy consumption of the society, and the energy consumption of buildings tends to continue to increase along with the improvement of living standard, so that the energy conservation of buildings becomes the key for realizing low-carbon development. On the other hand, the buildings in cities of China are dense, fire disasters occur frequently, and direct property loss caused by fire every year is more than 10 billion yuan. However, the traditional building materials have poor flame retardant property and have great potential safety hazard. Therefore, it is a trend of building materials to improve the thermal insulation performance and flame retardance of the materials.

In recent years, in order to realize green and sustainable development, thermal insulation materials are developed rapidly, and particularly, vacuum thermal insulation panels are widely applied to the fields of building thermal insulation, cold-chain logistics, white household appliances and the like due to the excellent characteristics of ultralow thermal conductivity, density and the like. Meanwhile, the flame retardant material is developed rapidly, and the inorganic flame retardant material, the organic flame retardant material and the inorganic-organic flame retardant material are popularized in the market rapidly.

The U.S. patent application publication No. US20150192238A1 discloses a vacuum insulation panel, which comprises a core material and a film material for coating the core material, wherein the film material has a layered structure, the layered structure comprises a surface protection layer, a metal barrier layer and a thermal deposition layer, and the obtained vacuum insulation panel has the characteristic of low thermal conductivity.

The U.S. patent application publication No. US20120164365a1 discloses a vacuum insulation panel and a method for manufacturing the same, wherein a fiberglass core board of the vacuum insulation panel is manufactured by a papermaking process, CaO is used as a getter, and the vacuum insulation panel manufactured after vacuum packaging has a long service life.

The Chinese invention patent with application publication number CN108223972A discloses a preparation method of a cloth tape wound reinforced vacuum insulation panel, which comprises the following specific steps: (1) spraying an interface agent on the surface of the vacuum insulation panel; (2) materials such as cement, styrene-acrylic emulsion, waterproofing agent and the like are weighed, mixed and stirred uniformly to prepare cement polymer mucilage; (3) after the continuous cloth belt is soaked in the polymer adhesive cement under the action of traction force, the continuous cloth belt does uniform-speed circular motion around the vacuum heat-insulating plate under the action of the wire guide head, and meanwhile, the vacuum heat-insulating plate moves at a certain speed along the axial direction until the cloth belt is uniformly distributed on the surface of the vacuum heat-insulating plate; (4) and (4) taking out the product obtained in the step (3), and curing and airing to obtain the product. The obtained vacuum insulation panel has the advantages of low heat conductivity coefficient, puncture resistance and the like.

the chinese patent application publication No. CN107629345A discloses a method for preparing a novel vacuum insulation panel. The method comprises the following steps: drying the heat-insulating core material, filling the heat-insulating core material into an inner barrier bag, vacuumizing and sealing the inner barrier bag to obtain an inner vacuum heat-insulating plate; placing the inner vacuum insulation panel between the two plate-shaped insulation materials to obtain an inner core; and (3) putting the inner core into an outer barrier bag, vacuumizing, sealing, and performing core-film integrated treatment to obtain the vacuum insulation panel. The preparation method of the novel vacuum insulation panel provided by the invention enhances the strength and puncture resistance of the vacuum insulation panel, and the heat insulation performance is not influenced even if the outer barrier bag is accidentally damaged.

the Chinese patent with application publication number CN105970742A discloses a preparation method of a vacuum insulation panel, which comprises the following steps: s1: mixing glass beads, glass fibers and activated carbon fibers in equal proportion; s2: fully stirring and mixing the mixture in the S1 and the methyl cellulose saturated solution to form flocculent mixture; s3: uniformly pouring the mixture in the S2 on a stainless steel screen according to the thickness requirement, and obtaining the vacuum insulation panel core material after airing, drying and cutting; s4: and placing the vacuum insulation panel core material in a barrier packaging bag, and vacuumizing and packaging to obtain the vacuum insulation panel. The glass beads in the S1 account for 30-50 percent; 49% -69% of glass fiber; the active carbon fiber accounts for 1 to 6 percent. The screen mesh is 60 ~ 90 mesh specification. The glass beads are hollow glass beads. The preparation method of the obtained vacuum insulation panel is simple and convenient, the heat insulation effect of the vacuum insulation panel is greatly improved, and meanwhile, the vacuum insulation panel is high in lightness, good in toughness and capable of being bent by about 10%. Meanwhile, the air drum problem is effectively solved by adopting a screen airing and drying mode.

In conclusion, the vacuum insulation panels are more and more widely applied in the building industry, but the surface of the vacuum insulation panel has limited puncture resistance and single flame retardant mode, and the popularization and the application of the vacuum insulation panel are not facilitated. Therefore, the surface protection and the improvement of the flame retardant property of the vacuum insulation panel become the key for solving the problems of popularization and application.

Disclosure of Invention

In order to solve the problems, the invention aims to provide a light high-strength flame-retardant vacuum heat-insulating plate protected by graphite polystyrene foam, which not only improves the puncture resistance of the vacuum heat-insulating plate, but also improves the flame retardant property of the vacuum heat-insulating plate.

The invention takes the polyphenyl foam as the outer protective layer, thus enhancing the puncture resistance of the vacuum insulation panel; the expanded graphite is used for modifying the polyphenyl foam, so that the heat insulation performance is improved; meanwhile, inorganic nano-particles such as magnesium hydroxide, aluminum hydroxide and the like are added into the foam, so that the mechanical property and the flame retardant property of the foam are improved;

the light high ~ strength flame ~ retardant vacuum insulation panel protected by graphite polystyrene foam is characterized by being of a sandwich structure, a core material is a vacuum insulation panel, an outer layer is graphite polystyrene foam, nano reinforcing particles are added into a graphite polystyrene foam layer, the volume fraction of expanded graphite particles is 10% ~ 25%, the nano reinforcing particles are aluminum hydroxide or magnesium hydroxide and are 5% ~ 15%, a fiber reinforcing framework is arranged in the foam layer and is 5% ~ 15%, and fibers are glass fibers or basalt fibers.

the invention also provides a preparation method of the light high-strength flame-retardant vacuum insulation panel protected by the graphite polyphenyl foam, which is characterized by comprising the following steps in sequence:

(1) surface activation is carried out on the expanded graphite particles and the reinforced nano particles by adopting a surfactant, wherein the surfactant is an amphoteric surfactant, and the using amount of the surfactant is ~ 1% of the mass of the resin;

(2) pre-foaming polystyrene particles and expanded graphite particles to obtain a pre-foaming material, wherein the pre-foaming temperature is ~ 140 ℃;

(3) mixing the pre h ~ foaming material and the nano reinforced particles, and uniformly stirring at 90 h ~ 100 ℃ for 0.5h ~ 1 h;

(4) placing the fiber reinforced framework in an inert atmosphere for pretreatment, wherein the temperature is 80-150 ℃;

(5) the method comprises the steps of horizontally placing a vacuum heat ℃ ~ insulating plate into a glass fiber reinforced framework, sleeving the glass fiber reinforced framework into a quadrilateral open mold, adding a pre ℃ ~ foaming material into the mold, sealing a mold cavity, performing secondary foaming molding by using steam, demolding and cutting to obtain the light high ℃ ~ strength flame ℃ ~ retardant heat ℃ ~ insulating plate, wherein the foaming temperature is 80 ℃ ~ 100 ℃.

advantageous effects

Compared with the prior art, the invention has the beneficial effects that: (1) the polystyrene foam is used as an outer protective layer, the puncture resistance of the vacuum insulation panel is improved, the expanded graphite is added into the foam to reflect heat radiation, and the thermal insulation effect is improved, and the inorganic nano particles are added into the foam to improve the mechanical property of the foam. The prepared light high-strength flame-retardant vacuum heat-insulating plate can be applied to the fields of building heat insulation and the like.

Detailed Description

the following examples are further illustrative of the present invention and are not intended to limit the scope of the present invention.