CN113149705A - Paper-surface gypsum board and preparation method thereof - Google Patents
Paper-surface gypsum board and preparation method thereof Download PDFInfo
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- CN113149705A CN113149705A CN202110318724.0A CN202110318724A CN113149705A CN 113149705 A CN113149705 A CN 113149705A CN 202110318724 A CN202110318724 A CN 202110318724A CN 113149705 A CN113149705 A CN 113149705A
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- gypsum
- board
- foaming agent
- lignin
- paper
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Classifications
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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
-
- 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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The application provides a thistle board and a preparation method thereof, the thistle board comprises a board core and a protective paper, wherein the board core is prepared from gypsum clinker, lignin, catalytic enzyme, starch, a foaming agent and water. The application also provides a preparation method of the paper-surface gypsum board. The catalytic enzyme can enable lignin adsorbed on the surface of the gypsum crystal and the surface of wood fiber in the mask paper to generate phenoxy radical, and the lignin in the gypsum board core and the wood fiber of the mask paper can generate phenoxy radical polymerization reaction to form covalent bond connection, so that the adhesion between the gypsum board core and the mask paper is improved.
Description
Technical Field
The invention relates to but is not limited to the technical field of building materials and paper-surface gypsum board technology, in particular to but not limited to a paper-surface gypsum board and a preparation method thereof.
Background
The paper-surface gypsum board is a common building material with large use and wide use amount, is widely applied to inner partition walls of various buildings such as residential buildings, office buildings, industrial factory buildings and the like, and has the advantages of light weight, good heat insulation, convenience in processing and the like. The strength of the gypsum plaster board greatly determines the use performance of the gypsum plaster board, a plurality of factors influencing the strength of the gypsum plaster board exist, the bonding performance of the facing paper and the gypsum core material is one of important indexes influencing the strength of the gypsum plaster board, and the good bonding of the facing paper and the core material can improve the strength of the gypsum plaster board, thereby being beneficial to the construction and application of the gypsum plaster board.
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 claims.
The application provides a thistle board adds lignin, catalytic enzyme in the gypsum thick liquids, and lignin is not only adsorbable on the gypsum crystal, improves the dispersibility of gypsum in the thick liquids, and simultaneously under the catalytic enzyme effect, lignin in the thick liquids can take place coupling reaction with the fibre in the mask paper for produce chemical bonding force between gypsum board core and the mask paper, improve gypsum board core and mask paper adhesion.
The application provides a thistle board, including board core and mask paper, the board core raw materials comprises gypsum clinker, lignin, catalytic enzyme, starch, foaming agent and water.
In the paper-surface gypsum board provided by the embodiment of the application, the core raw materials comprise the following components in parts by weight: 100 parts of gypsum clinker, 0.6 to 0.8 part of lignin, 0.01 to 0.02 part of catalytic enzyme, 0.3 to 0.6 part of starch, 0.00075 to 0.002 part of foaming agent and 62 to 68 parts of water.
In the paper-surface gypsum board provided by the embodiment of the application, the main component of the gypsum clinker is calcium sulfate hemihydrate and is prepared from natural gypsum or industrial byproduct gypsum, and the preparation method of the clinker can be carried out by adopting a method commonly used in the field.
In the gypsum plasterboard provided in the embodiment of the present application, the lignin is lignosulfonate;
optionally, the lignin is selected from any one or both of sodium lignosulfonate and calcium lignosulfonate.
In the gypsum plasterboard provided in the embodiments herein, the catalytic enzyme is a ligninase, optionally selected from a polyphenol oxidase (laccase) containing 4 copper ions.
In the gypsum plasterboard provided in the embodiment of the present application, the starch is a modified starch, and optionally, the modified starch is selected from any one or two of modified corn starch and modified tapioca starch;
preferably, the starch has a gelatinization temperature of 70 ℃ to 75 ℃.
In the gypsum plaster board provided in the embodiment of the present application, the foaming agent is added to the gypsum plaster board in the form of an aqueous solution of the foaming agent, and the mass fraction of the foaming agent in the aqueous solution of the foaming agent is 1.5% to 2%, preferably 1.5%.
In another aspect, the present application provides a method for preparing the above paper-surface gypsum board, comprising:
(1) adding the lignin into the water, and uniformly stirring to obtain a mixed solution;
(2) adding the catalytic enzyme into the mixed solution obtained in the step (1), uniformly stirring, standing for reaction to obtain a mixture;
(3) uniformly mixing the gypsum clinker, the starch and the mixture obtained in the step (2) to obtain first gypsum slurry;
(4) adding a foaming agent into water to prepare a foaming agent solution.
(5) Uniformly mixing the first gypsum slurry obtained in the step (3) with the foaming agent to obtain second gypsum slurry, pouring the second gypsum slurry on a lower protective paper, paving an upper protective paper on the upper surface of the second gypsum slurry, and forming to obtain a wet board;
(6) after the wet board is solidified, drying to obtain the paper-surface gypsum board;
in the preparation method of the paper-surface gypsum board provided by the embodiment of the application, in the step (2), the reaction temperature is 40 ℃ to 45 ℃ and the reaction time is 2h to 3 h.
In yet another aspect, the present application provides the use of catalytic enzymes and lignin to promote bonding of a board core and a cover paper in a gypsum plasterboard.
In the applications provided in the examples herein, the catalytic enzyme is a ligninase, optionally the ligninase is a polyphenol oxidase (laccase) containing 4 copper ions.
In the application provided by the embodiment of the application, the lignin is selected from any one or two of sodium lignosulfonate and calcium lignosulfonate.
In the application provided by the embodiment of the application, the lignin is used in an amount of 0.6 to 0.8 parts by weight based on 100 parts by weight of the gypsum clinker in the board core raw material; alternatively, the catalytic enzyme is used in an amount of 0.01 to 0.02 parts by weight.
The catalytic enzyme can make the lignin adsorbed on the surface of the gypsum crystal and the surface of the wood fiber in the mask paper generate phenolic oxygen free radical, and the lignin in the gypsum board core and the wood fiber of the mask paper can generate phenolic oxygen free radical polymerization reaction to form covalent bond connection, so that the adhesion between the gypsum board core and the mask paper can be improved.
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. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description.
Detailed Description
Hereinafter, embodiments of the present application will be described in detail to make objects, technical solutions and advantages of the present application more apparent. 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 gypsum plaster board, which comprises a board core and a protective paper, wherein the raw material of the board core consists of gypsum clinker, lignin, catalytic enzyme, starch, a foaming agent and water.
In the embodiment of the application, the board core comprises the following raw materials in parts by weight: 100 parts of gypsum clinker, 0.6 to 0.8 part of lignin, 0.01 to 0.02 part of catalytic enzyme, 0.3 to 0.6 part of starch, 0.00075 to 0.002 part of foaming agent and 62 to 68 parts of water.
In the embodiment of the application, the main component of the gypsum clinker is calcium sulfate hemihydrate and is prepared from natural gypsum or industrial byproduct gypsum, and the preparation method of the clinker can be carried out by adopting a method commonly used in the field.
In the present examples, the lignin is a lignosulfonate;
optionally, the lignin is selected from any one or both of sodium lignosulfonate and calcium lignosulfonate.
In the examples herein, the catalytic enzyme is a ligninase, optionally selected from polyphenol oxidase (laccase) containing 4 copper ions.
In the embodiment of the application, the starch is modified starch, optionally, the modified starch is selected from any one or two of modified corn starch and modified cassava starch;
preferably, the starch has a gelatinization temperature of 70 ℃ to 75 ℃.
In the examples herein, the foaming agent is added to the gypsum plasterboard in the form of an aqueous solution of a foaming agent, and the mass fraction of the foaming agent in the aqueous solution of the foaming agent is between 1.5% and 2%, preferably 1.5%.
The embodiment of the application also provides a method for improving the bonding property of the gypsum board core and the protective paper and a preparation method of the gypsum board with paper.
Example 1
In this embodiment: the gypsum clinker is clinker prepared from desulfurized gypsum, and the desulfurized gypsum is derived from China power plants; the lignin is sodium lignosulphonate, purchased from Nanjing chess, New Material Co., Ltd; the catalytic enzyme is laccase which is purchased from Hibei Qiansheng biological technology limited company; the starch is modified cassava starch, and the gelatinization temperature of the modified cassava starch is 70 ℃; the foaming agent was purchased from japan queen company under the designation FA201 (the foaming agent was added in the form of a foaming agent solution having a mass concentration of 1.5 wt.%).
The paper-faced gypsum board of the embodiment specifically comprises the following components:
100 parts of gypsum clinker, 0.6 part of lignin, 0.01 part of catalytic enzyme, 0.6 part of starch, 0.00075 part of foaming agent and 68 parts of water.
The preparation method of the paper-surface gypsum board comprises the following steps:
the gypsum plasterboard of this example was prepared by:
(1) weighing the lignin, adding the lignin into the water, and stirring for 0.5 hour;
(2) weighing the catalytic enzyme, adding the catalytic enzyme into the mixed solution obtained in the step (1), uniformly stirring, and standing at 45 ℃ for reaction for 2 hours;
(3) uniformly mixing the gypsum clinker, the starch and the mixed solution obtained in the step (2) to obtain first gypsum slurry;
(4) adding a foaming agent into water to prepare a foaming agent solution with the mass fraction of 1.5%.
(5) Adding the foaming agent aqueous solution at the outlet of the mixer, uniformly mixing the foaming agent aqueous solution with the first gypsum slurry to obtain second gypsum slurry, and pouring the second gypsum slurry on the mask paper; the second gypsum slurry and the mask paper are lapped, adhered and molded firmly to obtain a wet board;
(6) and after the wet board is solidified, drying to obtain the 12mm paper-surface gypsum board.
Example 2
In this embodiment: the gypsum clinker is clinker prepared from desulfurized gypsum, and the desulfurized gypsum is derived from China power plants; the lignin is calcium lignosulfonate, and is purchased from Nanjing chess, New Material Co., Ltd; the catalytic enzyme is laccase which is purchased from Hibei Qiansheng biological technology limited company; the starch is modified corn starch, and the gelatinization temperature of the modified cassava starch is 72 ℃; the blowing agent was purchased from japan queen company under the designation DL281 (the blowing agent was added as a blowing agent solution with a mass concentration of 1.8 wt.%).
The paper-faced gypsum board of the embodiment specifically comprises the following components:
100 parts of gypsum clinker, 0.7 part of lignin, 0.02 part of catalytic enzyme, and starch: 0.4 part by weight, 0.00144 parts by weight of foaming agent and 65 parts by weight of water.
The preparation method of the paper-surface gypsum board comprises the following steps:
(1) weighing the lignin, adding the lignin into the water, and stirring for 0.3 hour;
(2) weighing the catalytic enzyme, adding the catalytic enzyme into the mixed solution obtained in the step (1), uniformly stirring, and standing at 40 ℃ for reaction for 3 hours;
(3) uniformly mixing the gypsum clinker, the starch and the mixed solution obtained in the step (2) to obtain first gypsum slurry;
(4) adding a foaming agent into water to prepare a foaming agent solution with the mass fraction of 1.8%.
(5) Adding the foaming agent aqueous solution at the outlet of the mixer, uniformly mixing the foaming agent aqueous solution with the first gypsum slurry to obtain second gypsum slurry, and pouring the second gypsum slurry on the mask paper; the second gypsum slurry and the mask paper are lapped, adhered and molded firmly to obtain a wet board;
(6) and after the wet board is solidified, drying to obtain the 12mm paper-surface gypsum board.
Example 3
In this embodiment: the gypsum clinker is clinker prepared from desulfurized gypsum, and the desulfurized gypsum is from Shenhua group; the lignin is calcium lignosulfonate, and is purchased from Nanjing chess, New Material Co., Ltd; the catalytic enzyme is laccase which is purchased from Hibei Qiansheng biological technology limited company; the starch is modified corn starch, and the gelatinization temperature of the modified cassava starch is 72 ℃; the blowing agent was purchased from japan queen under the designation DL281 (the blowing agent was added in the form of a blowing agent solution having a mass concentration of 2 wt.%).
The paper-faced gypsum board of the embodiment specifically comprises the following components:
100 parts of gypsum clinker, 0.8 part of lignin, 0.02 part of catalytic enzyme, 0.3 part of starch, 0.002 part of foaming agent and 62 parts of water.
The gypsum plasterboard of this example was prepared by:
(1) weighing the lignin, adding the lignin into the water, and stirring for 0.5 hour;
(2) weighing the catalytic enzyme, adding the catalytic enzyme into the mixed solution obtained in the step (1), uniformly stirring, and standing at 40 ℃ for reaction for 3 hours;
(3) uniformly mixing the gypsum clinker, the starch and the mixed solution obtained in the step (2) to obtain first gypsum slurry;
(4) adding a foaming agent into water to prepare a foaming agent solution with the mass fraction of 2%.
(5) Adding the foaming agent aqueous solution at the outlet of the mixer, uniformly mixing the foaming agent aqueous solution with the first gypsum slurry to obtain second gypsum slurry, and pouring the second gypsum slurry on the mask paper; the second gypsum slurry and the mask paper are lapped, adhered and molded firmly to obtain a wet board;
(6) and after the wet board is solidified, drying to obtain the 12mm paper-surface gypsum board.
Comparative example 1
This comparative example differs from example 1 only in that no lignin was added and the remaining raw materials and preparation steps were the same as in example 1.
Comparative example 2
This comparative example differs from example 1 only in that no catalytic enzyme is added, and the remaining raw materials and preparation steps are the same as in example 1.
Comparative example 3
This comparative example differs from example 1 only in that no catalytic enzyme and lignin were added and the remaining raw materials and preparation steps were the same as in example 1.
Performance testing
The paper-surface gypsum boards of the examples and the comparative examples are tested according to Chinese national standard GB/T9775-2008 paper-surface gypsum board, and the test conditions are as follows: the gypsum plasterboards prepared in the test examples and comparative examples were subjected to the test of breaking load and adhesion under the conditions of temperature (25. + -.5) ℃ and relative humidity (50. + -.5)% and thickness of 12mm, and the results are shown in Table 1.
TABLE 1 Gypsum board Performance test results
This disclosure is illustrative of the principles of the examples of the present application and is not intended to limit the application in any way or in any way to the specific embodiments. It will be apparent to those skilled in the art that variations, changes, modifications, variations, alterations, and adaptations may be made to the elements, methods, systems, etc., of the embodiments of the application without departing from the principles, spirit, and scope of the embodiments, systems, etc., of the application as set forth above. Such variations, changes, modifications, and alterations are intended to be included within the scope of this application as defined in the claims appended hereto. While embodiments of this application may be embodied in many different forms, some embodiments of this application are described in detail herein. Moreover, the examples of the present application include any possible combination of some or all of the various embodiments described herein and are also included within the scope of the present application as defined by the claims. All patents, patent applications, and other cited materials mentioned in this application or anywhere in any cited patent, cited patent application, or other cited material are hereby incorporated by reference in their entirety.
The above disclosure is intended to be illustrative and not exhaustive. Many variations and alternatives will suggest themselves to those skilled in the art. All such alternatives and modifications are intended to be included within the scope of the present claims, wherein the term "comprising" means "including, but not limited to".
This completes the description of alternative embodiments of the present application. Those skilled in the art will recognize other equivalents to the embodiments described herein which equivalents are also encompassed by the claims appended hereto.
Claims (10)
1. The gypsum plaster board comprises a board core and a protective paper, wherein the board core is prepared from gypsum clinker, lignin, catalytic enzyme, starch, a foaming agent and water.
2. The paper-faced gypsum board of claim 1, wherein the board core raw materials comprise, in parts by weight: 100 parts of gypsum clinker, 0.6 to 0.8 part of lignin, 0.01 to 0.02 part of catalytic enzyme, 0.3 to 0.6 part of starch, 0.00075 to 0.002 part of foaming agent and 62 to 68 parts of water.
3. The gypsum plasterboard of claim 1, wherein the lignin is a lignosulfonate;
optionally, the lignin is selected from any one or both of sodium lignosulfonate and calcium lignosulfonate.
4. The gypsum plasterboard of claims 1 to 3, wherein the catalytic enzyme is a ligninase, optionally selected from a polyphenol oxidase containing 4 copper ions.
5. The gypsum plasterboard of claims 1 to 3, wherein the starch is a modified starch, optionally the modified starch is selected from any one or both of a modified corn starch and a modified tapioca starch;
preferably, the starch has a gelatinization temperature of 70 ℃ to 75 ℃.
6. The gypsum plasterboard of claim 1, wherein the foaming agent is added to the gypsum plasterboard in the form of an aqueous foaming agent solution, and the mass fraction of the foaming agent in the aqueous foaming agent solution is between 1.5% and 2%, preferably 1.5%.
7. A method of making a paper-faced gypsum board according to any one of claims 1 to 6, comprising:
(1) adding the lignin into the water, and uniformly stirring to obtain a mixed solution;
(2) adding the catalytic enzyme into the mixed solution obtained in the step (1), uniformly stirring, standing for reaction to obtain a mixture;
(3) uniformly mixing the gypsum clinker, the starch and the mixture obtained in the step (2) to obtain first gypsum slurry;
(4) adding a foaming agent into water to prepare a foaming agent solution;
(5) uniformly mixing the first gypsum slurry obtained in the step (3) with the foaming agent to obtain second gypsum slurry, pouring the second gypsum slurry on a lower protective paper, paving an upper protective paper on the upper surface of the second gypsum slurry, and forming to obtain a wet board;
(6) after the wet board is solidified, drying to obtain the paper-surface gypsum board;
optionally, in step (2), the reaction is carried out at a temperature of 40 ℃ to 45 ℃ for a time of 2h to 3 h.
8. Use of a catalytic enzyme and lignin to promote bonding of a board core and a cover paper in a gypsum plasterboard.
9. Use according to claim 8, wherein the catalytic enzyme is a ligninase, optionally a polyphenol oxidase containing 4 copper ions.
10. The use according to claim 8, wherein the lignin is selected from any one or two of sodium lignosulphonate and calcium lignosulphonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110318724.0A CN113149705A (en) | 2021-03-25 | 2021-03-25 | Paper-surface gypsum board and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110318724.0A CN113149705A (en) | 2021-03-25 | 2021-03-25 | Paper-surface gypsum board and preparation method thereof |
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