CN113356468A - Paper-surface gypsum board and preparation method thereof - Google Patents
Paper-surface gypsum board and preparation method thereof Download PDFInfo
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- CN113356468A CN113356468A CN202110573523.5A CN202110573523A CN113356468A CN 113356468 A CN113356468 A CN 113356468A CN 202110573523 A CN202110573523 A CN 202110573523A CN 113356468 A CN113356468 A CN 113356468A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/288—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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Abstract
本申请公开了一种纸面石膏板及其制备方法，所述纸面石膏板包括板芯、护面纸和封装膜，所述板芯原料含有有机相变材料乳液，所述封装膜设置在所述护面纸表面，设置为阻隔所述有机相变材料乳液从板芯向纸面石膏板外扩散；所述封装膜的原料包括水性UV封闭漆，水性UV封闭漆可通过紫外线固化处理。本申请还提供了上述纸面石膏板的制备方法。在本申请中以常规的纸面石膏板工艺为基础，将有机相变材料以乳化液的形式作为纸面石膏板湿料中的一种，不仅解决了疏水的有机相变材料难溶于熟石膏料浆的问题，并可替代部分熟石膏水化用水，体现了环保和节材的特点。The present application discloses a paper-faced gypsum board and a preparation method thereof. The paper-faced gypsum board comprises a board core, a protective paper and an encapsulation film, the board core raw material contains an organic phase change material emulsion, and the encapsulation film is arranged on the The surface of the protective paper is set to block the diffusion of the organic phase change material emulsion from the core to the gypsum board; the raw material of the encapsulation film includes water-based UV sealer, and the water-based UV sealer can be cured by ultraviolet rays. The present application also provides a preparation method of the above-mentioned gypsum board. In this application, based on the conventional gypsum board technology, the organic phase change material is used in the form of an emulsion as one of the wet materials of the gypsum board, which not only solves the problem that the hydrophobic organic phase change material is insoluble in cooked The problem of gypsum slurry, and can replace part of the water used for hydration of plaster of Paris, reflects the characteristics of environmental protection and material saving.
Description
Technical Field
The present invention relates to building material technology, and is especially one kind of gypsum plaster board and its making process.
Background
With the development of social economy, the contradiction of energy supply is increasingly prominent. Research shows that the building energy consumption accounts for 20-40% of primary energy consumption, and the development of green energy storage building materials and the reduction of the building energy consumption are effective ways for solving the problem of the global energy supply contradiction in the future. The phase change energy storage material is a high-efficiency energy storage substance, can improve the functions of building materials, reduce building energy consumption and adjust the indoor environment comfort level of a building, and can store available heat energy in a phase change latent heat mode, so that the storage and conversion of available energy are realized, and the phase change energy storage material has a good development prospect in building energy conservation.
When the phase-change energy storage material is applied to the field of composite materials, particularly to the field of building materials, a simple-process and low-cost packaging process is urgently needed, the phase-change energy storage material is packaged in a building material product, the leakage of the phase-change energy storage material is avoided in the using process of the phase-change building material product, and therefore the application of the phase-change energy storage material in the field of building materials is realized. The existing preparation methods of the phase-change energy-storage gypsum board can be divided into three types: dipping method, direct mixing method, and packaging method. Although the impregnation method and the direct mixing method have simple preparation processes, the phase-change material is easy to bleed out, so the method is rarely applied to actual production. The packaging method comprises micro packaging and macro packaging, the micro packaging is complex in process and high in market cost at present, and popularization and application of the phase-change energy-storage gypsum board are limited. The application of the macroscopic encapsulation method on the phase change energy storage gypsum board is mainly that the phase change material proposed in the invention patent CN102535735B is made into an encapsulated phase change product by the macroscopic encapsulation method in advance, and then the encapsulated phase change product is added into gypsum slurry, so that the phase change energy storage gypsum board is prepared. Although the preparation process is simple, the method is not suitable for a gypsum board production line for high-speed production because the block-shaped objects are embedded into flowing plaster slurry.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the present application.
The application provides a paper-surface gypsum board, which comprises a board core, a protective paper and a packaging film,
the raw materials of the board core comprise organic phase-change material emulsion, the packaging film is arranged on the surface of the protective paper and is used for preventing the organic phase-change material emulsion from diffusing from the board core to the outside of the gypsum board with the paper surface;
the packaging film is a solid film formed by ultraviolet irradiation and curing of water-based UV sealing paint.
In one embodiment provided herein, the core comprises the following raw materials in parts by weight: 100 parts of gypsum clinker, 100 to 200 parts of organic phase-change material emulsion, 0 to 0.05 part of water reducing agent, 0.01 to 0.06 part of foaming agent, 0.4 to 1.2 parts of binder, 0.6 to 1.2 parts of glass fiber and 0 to 30 parts of water. The board core is composed of the raw materials.
In one embodiment provided herein, the raw materials of the organic phase change material emulsion comprise, by weight, 10 to 40 parts of an organic phase change material, 4 to 9 parts of an emulsifier, 0.2 to 0.5 part of a co-emulsifier, and 50.5 to 85.8 parts of deionized water.
In one embodiment provided herein, the organic phase change material is selected from any one or more of paraffin, lauric acid, and hexadecane;
in one embodiment provided herein, the particle size of the organic phase change material in the organic phase change material emulsion is 0.5 microns to 2.5 microns; the melting point of the organic phase change material is 18-48 ℃.
In one embodiment provided herein, the emulsifier consists of span 80 and sodium stearate;
in one embodiment provided herein, the weight ratio of span 80 to sodium stearate is (1.2 to 1.5): 1; preferably, the weight ratio of span 80 to sodium stearate is (1.3 to 1.4): 1;
in one embodiment provided herein, the co-emulsifier is selected from any one or more of ethylene glycol, n-pentanol, n-butanol, and glycerol.
In one embodiment provided herein, a method for preparing an emulsion of an organic phase change material includes:
1) heating and uniformly mixing the organic phase change material, the emulsifier and the co-emulsifier to obtain a mixture;
2) slowly adding deionized water into the mixture obtained in the step 1) under the conditions of heat preservation and stirring, continuing to preserve heat for 5min to 20min after the addition is finished, and cooling to room temperature to obtain the organic phase change material emulsion.
In one embodiment provided herein, the temperature of the heating in step 1) is 75 ℃ to 90 ℃;
in one embodiment provided herein, the slow adding speed of the deionized water in the step 2) is 10 to 40 parts by weight/min, and the temperature of the heat preservation is 75 to 90 ℃; the stirring speed is 600r/min to 1200 r/min.
In one embodiment provided herein, the foaming agent is selected from any one or more of sodium lauryl sulfate, sodium bicarbonate, and ammonium bicarbonate;
in one embodiment provided herein, the water reducing agent is selected from any one or more of a naphthalene based water reducing agent and a polycarboxylic acid based water reducing agent.
In one embodiment provided herein, the binder is a modified starch;
in one embodiment provided herein, the modified starch is selected from any one or more of modified tapioca starch, modified corn starch, modified potato starch.
In yet another aspect, the present application provides a method for making the above-mentioned paper-faced gypsum board, comprising,
a) uniformly stirring and mixing the water, the water reducing agent and the binder to obtain a mixture 1;
b) foaming the foaming agent, and then uniformly mixing the foamed foaming agent, the mixture 1 prepared in the step a), the gypsum clinker, the glass fiber and the organic phase-change material emulsion to form gypsum slurry;
c) pouring the gypsum slurry prepared in the step b) on a protective paper, overlapping, firmly adhering and molding, and drying to constant weight to prepare a gypsum board to be treated;
d) coating the surface of the gypsum board to be treated prepared in the step c) with water-based UV sealing paint, and placing the gypsum board to be treated under an ultraviolet UV curing lamp for curing treatment to obtain the gypsum board with paper surface;
in an embodiment provided by the application, step d) includes that the gypsum board surface to be treated made in step c) is subjected to fixed-thickness sanding and dust removal treatment, then the gypsum board surface to be treated is uniformly coated with water-based UV sealing paint, and is subjected to hot air drying and then placed under an ultraviolet UV curing lamp for curing treatment. Repeating the step d) for more than two times to obtain the gypsum plaster board;
in one embodiment provided herein, the aqueous UV sealer main component includes any one or more of an aqueous urethane acrylate, an aqueous epoxy acrylate, and an aqueous polyester acrylate. The water-based UV sealing paint is common water-based UV paint on the market, can be obtained by market purchase, and has excellent waterproof, dustproof and oil stain resistant functions after being cured.
In one embodiment provided herein, the temperature of the hot air drying in step d) is 50 to 70 ℃; optionally, the thickness of the packaging film after curing is 160 μm to 200 μm; alternatively, the UV irradiation energy is 260mJ/cm2To 360mJ/cm2. The coating weight is 70g/m2To 190g/m2And each time of blowing by hot air is realized for 3min to 5 min.
This application has following advantage:
1. in the invention, based on the conventional paper-surface gypsum board process, the organic phase-change material is used as one of wet materials of the paper-surface gypsum board in the form of emulsion, so that the problem that the hydrophobic organic phase-change material is difficult to dissolve in calcined gypsum slurry is solved, part of calcined gypsum hydration water can be replaced, and the characteristics of environmental protection and material saving are embodied;
2. according to the invention, after UV photocuring treatment is carried out after UV paint is coated on the outer surface of the phase-change gypsum board substrate in a rolling way, a resin sealing layer with waterproof, dustproof and oil stain resistant functions is formed on the outer surface of the phase-change gypsum board, and the resin sealing layer has the function of preventing the phase-change material from permeating, diffusing or volatilizing into the environment. Compared with a microcapsule encapsulation method, the encapsulation method provided by the invention has the difference that the UV paint is coated on the outer surface of the formed and dried gypsum board containing the phase-change material in a rolling way and is subjected to UV light curing treatment, so that a resin sealing layer is formed on the surface of the gypsum board.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the invention in its aspects as described in the specification.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application are described in detail below. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The embodiment of the application provides a paper-surface gypsum board, which comprises a board core, a protective paper and a packaging film,
the raw materials of the board core comprise organic phase-change material emulsion, the packaging film is arranged on the surface of the protective paper and is used for preventing the organic phase-change material emulsion from diffusing from the board core to the outside of the gypsum board with the paper surface;
the packaging film is a solid film formed by ultraviolet irradiation and curing of water-based UV sealing paint.
In the embodiment of the application, the core comprises the following raw materials in parts by weight: 100 parts of gypsum clinker, 100 to 200 parts of organic phase-change material emulsion, 0 to 0.05 part of water reducing agent, 0.01 to 0.06 part of foaming agent, 0.4 to 1.2 parts of binder, 0.6 to 1.2 parts of glass fiber and 0 to 30 parts of water. The board core is composed of the raw materials.
In the embodiment of the application, the raw materials of the organic phase change material emulsion comprise, by weight, 10 to 40 parts of an organic phase change material, 4 to 9 parts of an emulsifier, 0.2 to 0.5 part of a co-emulsifier, and 50.5 to 85.8 parts of deionized water.
In the embodiment of the present application, the organic phase change material is selected from any one or more of paraffin, lauric acid and hexadecane;
in the embodiment of the application, the particle size of the organic phase change material in the organic phase change material emulsion is 0.5 microns to 2.5 microns; the melting point of the organic phase change material is 18-48 ℃.
In the examples of the present application, the emulsifier consists of span 80 and sodium stearate;
in the embodiments of the present application, the weight ratio of span 80 to sodium stearate is (1.2 to 1.5): 1; preferably, the weight ratio of span 80 to sodium stearate is (1.3 to 1.4): 1;
in the examples of the present application, the coemulsifier is selected from any one or more of ethylene glycol, n-pentanol, n-butanol and glycerol.
In an embodiment of the present application, a method for preparing an organic phase change material emulsion includes:
1) heating and uniformly mixing the organic phase change material, the emulsifier and the co-emulsifier to obtain a mixture;
2) slowly adding deionized water into the mixture obtained in the step 1) under the conditions of heat preservation and stirring, continuing to preserve heat for 5min to 20min after the addition is finished, and cooling to room temperature to obtain the organic phase change material emulsion.
In the examples of the present application, the temperature of the heating in step 1) is 75 ℃ to 90 ℃;
in the embodiment of the application, the speed of slowly adding deionized water in the step 2) is 10 to 40 weight parts/min, and the temperature of the heat preservation is 75 ℃ to 90 ℃; the stirring speed is 600r/min to 1200 r/min.
In the embodiments of the present application, the foaming agent is selected from any one or more of sodium lauryl sulfate, sodium bicarbonate and ammonium bicarbonate;
in the embodiment of the present application, the water reducing agent is selected from any one or more of a naphthalene water reducing agent and a polycarboxylic acid water reducing agent.
In the examples of the present application, the binder is a modified starch;
in the examples herein, the modified starch is selected from any one or more of modified tapioca starch, modified corn starch, modified potato starch.
In the embodiment of the application, the method for measuring the phase change enthalpy of the phase change heat storage gypsum board refers to the phase change temperature regulation performance test method of JC/T2111-2012 building material in the Chinese building material industry standard; the method for measuring the transverse breaking load and the longitudinal breaking load adopts a method for measuring the Chinese national standard GB/T9775-2008 paper surface gypsum board.
Example 1
In the embodiment, the paraffin wax is selected from paraffin wax with a melting point of 20 ℃ and purchased from Shanghai Joule wax Co., Ltd under the brand number of 20; span 80 was purchased from Henan Taiji chemical products, Inc.; the sodium stearate was purchased from Nanjing chemical reagents, Inc.; the coemulsifier is glycol and is purchased from Daxing chemical trade company, Inc. in Tianjin;
the foaming agent is sodium dodecyl sulfate and is purchased from Tooming evolution engineering Co., Ltd; the binder is modified corn starch, and is purchased from Shenyang Xugong adhesive science and technology Limited; glass fibers were purchased from megalithic corporation, china; the water-based UV sealing paint is purchased from Bohai fine chemical company, Inc. of Zhongshan city, and has the brand number of BH-W-08D.
In this embodiment, the preparation method of the paraffin emulsion comprises: firstly, heating 40 parts by weight of paraffin with the melting point of 20 ℃, 9 parts by weight of compound emulsifier consisting of span 80 and sodium stearate according to the weight ratio of 1.4:1 and 0.5 part by weight of co-emulsifier glycol to 90 ℃ and uniformly mixing to obtain a mixture; and secondly, slowly adding 50.5 parts by weight of deionized water into the obtained mixture under the conditions of constant temperature and stirring, wherein the speed of slowly adding the deionized water is 10 parts by weight/min, keeping the temperature of 90 ℃ all the time in the water adding process, stirring at the speed of 1200r/min, keeping the temperature for 20 minutes after the deionized water is completely added, and cooling to the room temperature to obtain the organic phase change material emulsion. The average particle size of the organic phase-change material in the organic phase-change material emulsion is 0.5 micrometer; the preparation method of the phase-change heat storage gypsum board comprises the following steps:
step 1) 100 parts by weight of gypsum clinker, 200 parts by weight of paraffin emulsion, 0.01 part by weight of foaming agent sodium dodecyl sulfate, 1.2 parts by weight of modified corn starch and 1.2 parts by weight of glass fiber;
step 2) foaming the foaming agent in the foaming machine;
step 3) adding the gypsum clinker, the glass fiber, the modified corn starch, the paraffin emulsion and the foaming agent after foaming into a stirrer at the same time, uniformly stirring, forming on a protective paper, and then performing 3 drying stages with gradually decreased drying temperature, wherein the first stage is as follows: drying at 160 ℃ for 30 minutes; and a second stage: drying at 105 ℃ for 1 minute; and a third stage: drying at 45 ℃ to constant weight to obtain a phase change energy storage gypsum board substrate;
step 4) carrying out sanding and dust removal treatment on the surface of the phase change energy storage gypsum board substrate obtained in the step 3), and then uniformly coating the surface of the gypsum board to be treated with water-based UV sealing paint, wherein the coating weight is 90g/m2Drying with 50 deg.C hot air for 5min, and curing with UV irradiation energy of 300mJ/cm2After the water-based UV sealing paint is cured, carrying out secondary sanding and dust removal treatment, and then uniformly coating the water-based UV sealing paint on the surface of the film formed by the water-based UV sealing paint, wherein the coating weight is 150g/m2Drying with hot air at 70 deg.C for 5min, and curing with UV irradiation energy of 360mJ/cm2And curing the water-based UV sealing paint coated for the second time to obtain the paper-surface gypsum board.
The packaged phase-change energy-storage gypsum board product is placed in a drying box with the temperature set to be 100 ℃, oil absorption paper is pressed on the surface of the gypsum board by a heavy object (if phase-change materials leak, the oil absorption paper changes color due to the fact that organic phase-change materials are adsorbed), and after drying for 12 hours, the appearance of the oil absorption paper is not changed, so that the phase-change materials are well packaged in the phase-change gypsum board provided by the invention. The enthalpy value of the obtained phase-change gypsum board is 80.0J/g, the transverse breaking load is 268.1N, the longitudinal breaking load is 580.2N, and the thickness of a packaging film is 200 mu m.
Example 2
In the embodiment, the lauric acid is selected from lauric acid with the melting point of 41 ℃, purchased from Guangzhou Yingxiang chemical Co., Ltd, and made into Malaysia coconut tree brand; span 80 was purchased from Henan Taiji chemical products, Inc.; the sodium stearate was purchased from Nanjing chemical reagents, Inc.; the coemulsifier is n-amyl alcohol purchased from Daxing chemical trade company, Tianjin;
the water reducing agent is A naphthalene water reducing agent which is purchased from Shenyang Pu and chemical industry Co., Ltd and is of FDN-A brand; the foaming agent is sodium dodecyl sulfate and is purchased from Tooming evolution engineering Co., Ltd; the binder is modified tapioca starch, and is purchased from Shenyang Xugong adhesive science and technology Limited; glass fibers were purchased from megalithic corporation, china; the water-based UV sealing paint is purchased from Jiangyin Getai chemical Co., Ltd and is of a mark GT-3210.
In this embodiment, the preparation method of the lauric acid emulsion includes: firstly, 30 parts by weight of lauric acid with a melting point of 41 ℃, 7 parts by weight of compound emulsifier consisting of span 80 and sodium stearate in a weight ratio of 1.3:1 and 0.4 part by weight of co-emulsifier n-amyl alcohol are heated to 85 ℃ and mixed uniformly to obtain a mixture; and secondly, slowly adding 62.6 parts by weight of deionized water into the obtained mixture under the conditions of constant temperature and stirring, wherein the speed of slowly adding the deionized water is 20 parts/min, keeping the temperature of 85 ℃ all the time during the water adding process, stirring at the speed of 1000r/min, keeping the temperature for 15 minutes after the deionized water is added, and cooling to room temperature to obtain the organic phase change material emulsion. The average particle size of the organic phase change material in the organic phase change material emulsion is 1.5 microns.
The preparation method of the phase-change heat storage gypsum board comprises the following steps:
step 1) weighing the components according to 100 parts by weight of gypsum clinker, 100 parts by weight of lauric acid emulsion, 0.05 part by weight of naphthalene water reducer, 0.04 part by weight of foaming agent sodium dodecyl sulfate, 0.7 part by weight of modified tapioca starch, 0.7 part by weight of glass fiber and 18 parts by weight of water;
step 2) stirring and dispersing the water, the naphthalene water reducer and the modified cassava starch uniformly to form slurry, and foaming a foaming agent in a foaming machine;
step 3) adding the gypsum clinker, the glass fiber, the lauric acid emulsion, the slurry formed in the step 2) and the foaming agent after foaming into a stirrer at the same time, uniformly stirring, forming on a protective paper, and then performing 3 drying stages with gradually decreased drying temperature, namely a first stage: drying at 160 ℃ for 30 minutes; and a second stage: drying at 105 ℃ for 1 minute; and a third stage: drying at 45 ℃ to constant weight to obtain a phase change energy storage gypsum board substrate;
step 4) sanding and dedusting the surface of the phase change energy storage gypsum board substrate obtained in the step 3, and then uniformly coating the surface of the gypsum board to be treated with water-based UV sealing paint, wherein the coating weight is 80g/m2Drying with 50 deg.C hot air for 4min, and curing with UV irradiation energy of 280mJ/cm2After the water-based UV sealing paint is cured, carrying out secondary sanding and dust removal treatment, and then uniformly coating the water-based UV sealing paint on the surface of the film formed by the water-based UV sealing paint, wherein the coating weight is 140g/m2Drying with 70 deg.C hot air for 4min, and curing with UV irradiation energy of 350mJ/cm2And curing the water-based UV sealing paint coated for the second time to obtain the paper-surface gypsum board.
The packaged phase-change energy-storage gypsum board product is placed in a drying box with the temperature set to be 100 ℃, oil absorption paper is pressed on the surface of the gypsum board by a heavy object (if phase-change materials leak, the oil absorption paper changes color due to the fact that organic phase-change materials are adsorbed), and after drying for 12 hours, the appearance of the oil absorption paper is not changed, so that the phase-change materials are well packaged in the phase-change gypsum board provided by the application. The enthalpy value of the obtained phase-change gypsum board is 41.9J/g, the transverse breaking load is 272.4N, the longitudinal breaking load is 589.3N, and the thickness of a packaging film is 180 mu m.
Example 3
In the embodiment, the hexadecane with the melting point of 18 ℃ is selected and purchased from Shanghai Confucian entropy New energy science and technology Limited; span 80 was purchased from Henan Taiji chemical products, Inc.; the sodium stearate was purchased from Nanjing chemical reagents, Inc.; the coemulsifier is glycerol and is purchased from Daxing chemical trade company, Inc. in Tianjin;
the water reducing agent is a polycarboxylic acid water reducing agent which is purchased from Jiangmen strong building materials science and technology Limited and has the brand number of QL-PC 5; the foaming agent is sodium dodecyl sulfate and is purchased from Tooming evolution engineering Co., Ltd; the binder is modified corn starch, and is purchased from Shenyang Xugong adhesive science and technology Limited; glass fibers were purchased from megalithic corporation, china; the water-based UV sealing paint is purchased from Bohai fine chemical company, Inc. of Zhongshan city, and has the brand number of BH-W-08D.
In this embodiment, the preparation method of the hexadecane emulsion comprises: firstly, heating 10 parts by weight of hexadecane with the melting point of 18 ℃, 4 parts by weight of compound emulsifier consisting of sodium stearate and span 80 according to the weight ratio of 1:1.5 and 0.2 part by weight of co-emulsifier glycerin to 75 ℃ and uniformly mixing to obtain a mixture; and secondly, under the conditions of constant temperature and stirring, slowly adding 85.8 parts by weight of deionized water into the obtained mixture, wherein the speed of slowly adding the deionized water is 40 parts/min, keeping the temperature of 75 ℃ all the time in the water adding process, stirring at the speed of 600r/min, keeping the temperature for 5 minutes after the deionized water is added, and cooling to the room temperature to obtain the organic phase change material emulsion. The average particle size of the organic phase-change material in the organic phase-change material emulsion is 2.5 microns;
the preparation method of the phase-change heat storage gypsum board comprises the following steps:
step 1) weighing each component according to 100 parts by weight of gypsum clinker, 100 parts by weight of hexadecane emulsion, 0.03 part by weight of polycarboxylic acid water reducing agent, 0.06 part by weight of foaming agent sodium dodecyl sulfate, 0.4 part by weight of modified corn starch, 0.6 part by weight of glass fiber and 10 parts by weight of water;
step 2) stirring and dispersing the water, the polycarboxylic acid water reducing agent and the modified corn starch uniformly to form slurry, and foaming a foaming agent in a foaming machine;
step 3) adding the gypsum clinker, the glass fiber, the hexadecane emulsion, the slurry formed in the step 2) and the foaming agent after foaming into a stirrer at the same time, uniformly stirring, forming on a protective paper, and then performing 3 drying stages with gradually decreased drying temperature, wherein the first stage is as follows: drying at 160 ℃ for 30 minutes; and a second stage: drying at 105 ℃ for 1 minute; and a third stage: drying at 45 ℃ to constant weight to obtain a phase change energy storage gypsum board substrate;
step 4) sanding and dedusting the surface of the phase change energy storage gypsum board substrate obtained in the step 3, and then uniformly coating the surface of the gypsum board to be treated with water-based UV sealing paint, wherein the coating weight is 70g/m2Drying with 50 deg.C hot air for 3min, and curing with UV irradiation energy of 260mJ/cm2After the water-based UV sealing paint is cured, carrying out secondary sanding and dust removal treatment, and then uniformly coating the water-based UV sealing paint on the surface of the film formed by the water-based UV sealing paint, wherein the coating weight is 130g/m2Drying with 70 deg.C hot air for 3min, and curing with UV irradiation energy of 330mJ/cm2And curing the water-based UV sealing paint coated for the second time to obtain the paper-surface gypsum board.
The packaged phase-change energy-storage gypsum board product is placed in a drying box with the temperature set to be 100 ℃, oil absorption paper is pressed on the surface of the gypsum board by a heavy object (if phase-change materials leak, the oil absorption paper changes color due to the fact that organic phase-change materials are adsorbed), and after drying for 12 hours, the appearance of the oil absorption paper is not changed, so that the phase-change materials are well packaged in the phase-change gypsum board provided by the invention. The enthalpy value of the obtained phase-change gypsum board is 16.4J/g, the transverse breaking load is 278.5N, the longitudinal breaking load is 608.2N, and the thickness of the packaging film is 160 mu m.
Comparative example 1
This comparative example differs from example 1 only in that the paper-faced gypsum board substrate was prepared without the use of an aqueous UV sealer to encapsulate the gypsum board substrate. Marked as phase change energy storage gypsum board comparison board 1.
The phase-change gypsum board prepared in the comparative example 1 has 80% obviously changed oil compared with the oil absorption paper pressed on the surface of the board 1, the oil absorption paper has a darker color and increased transparency, and the phase-change material in the phase-change board obtained in the comparative example 1 is revealed. On the other hand, the phase change gypsum board obtained in example 1 had an enthalpy of 80.0J/g, a transverse breaking load of 268.1N and a longitudinal breaking load of 580.2N. Comparative phase-change gypsum board 1 obtained in comparative example 1 had an enthalpy of 75.3J/g, a transverse breaking load of 228.7N and a longitudinal breaking load of 531.4N. The comparison shows that the enthalpy value and the strength of the phase-change gypsum board obtained in example 1 are better than those of comparative example 1, and the encapsulation film formed by the UV-cured water-based UV sealing paint used in example 1 not only effectively prevents the phase-change material in the board core from leaking, but also has the effect of enhancing the strength of the gypsum board.
Comparative example 2
The comparative example differs from example 1 only in that, in the preparation of the phase change material emulsion without the use of a co-emulsifier, it was found that the paraffin emulsion was significantly delaminated after a period of standing. In the production process, the product cannot be stored and cannot be used for subsequent plate making.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (10)
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