Plant fiber mud and preparation method thereof

Abstract

The invention relates to the field of environment-friendly materials, in particular to plant fiber mud and a preparation method thereof. The invention relates to a plant fiber composite material which comprises the following components in parts by weight: 30-50 parts of plant fibers; 40 to 60 parts of diatomite; 10 to 15 parts of SiO2 gel; 10 to 15 parts of aloe vera gel; 10 to 20 parts of nano hollow microspheres; 5-15 parts of an auxiliary agent; the heat-resistant and flame-retardant properties of the plant fiber mud are remarkably improved by adding the SiO2 gel, pores of the SiO2 gel are filled with the nano hollow microspheres, the SiO2 gel can be prevented from excessively absorbing water while the flame-retardant property of the SiO2 gel is enhanced, and the humidity of the plant fiber mud is adjusted to prevent excessive moisture and mildewing; the accumulation of the nano hollow microspheres in the dispersion process is reduced by adding the nano hollow microspheres in batches, so that the nano hollow microspheres can be uniformly dispersed in the SiO2 gel, and the structure of the material is stabilized by adding the sodium potassium silicate.

Description

Technical Field

[0001] The present invention relates to the field of environmentally friendly materials, and in particular to plant fiber mud and a preparation method thereof. Background Art

[0002] Plant fiber mud is an environmentally friendly interior wall decorative material made primarily from diatomaceous earth and plant fibers. While it shares the traditional diatomaceous earth properties of formaldehyde removal, air purification, humidity regulation, and mildew and antibacterial properties, it also boasts a wealth of decorative effects, excellent environmental performance, outstanding physical properties, and good seismic resistance, making it a new generation of interior decorative materials replacing wallpaper and latex paint. In recent years, the public has increasingly demanded the safety of environmentally friendly interior wall decorative materials. Safety is reflected not only in environmental protection but also in heat and flame resistance. However, current plant fiber muds lack these properties. Therefore, there is an urgent need for an environmentally friendly plant fiber mud that also possesses heat and flame resistance. Summary of the Invention

[0003] The purpose of the present invention is to provide a plant fiber mud and a preparation method thereof in view of the deficiencies in the prior art.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] The first aspect of the present invention is to provide a plant fiber mud, which comprises, by weight:

[0006]

[0007] Preferably, the plant fiber includes at least one of coconut shell fiber, straw fiber, bamboo fiber, eucalyptus fiber, cotton fiber and hemp fiber.

[0008] Preferably, the auxiliary agent includes at least one of a defoaming agent, a dispersant, an antifreeze agent, a mildew inhibitor, an antioxidant, a pigment and filler, and a coupling agent.

[0009] More preferably, the pigment and filler include at least one of calcium powder, quartz powder, talc powder, kaolin and white cement.

[0010] The second aspect of the present invention is to provide a method for preparing the above-mentioned plant fiber mud, comprising the following steps:

[0011] S1. Weighing SiO2 gel and nano hollow microspheres in parts by weight, placing the SiO2 gel in a grinding device for pulverization, adding potassium sodium silicate, a portion of the nano hollow microspheres, and deionized water, performing a first ultrasonic stirring, and then adding the remaining nano hollow microspheres and performing a second ultrasonic stirring to obtain slurry A;

[0012] S2. Weigh plant fiber, diatomaceous earth, aloe vera gel, and an additive in parts by weight, place the plant fiber, the aloe vera gel, and the additive in a dispersion device for high-speed dispersion treatment, then add the diatomaceous earth and disperse evenly to obtain slurry B;

[0013] S3. After mixing the slurry A and the slurry B, adjust the pH to weak alkalinity, and perform filtering and freeze-drying in sequence to obtain the plant fiber mud.

[0014] Preferably, in step S1, the pulverization treatment comprises: performing preliminary pulverization of the SiO2 gel by dry grinding, and then adding mixed grinding beads and deionized water to perform wet grinding for 1-3 hours.

[0015] More preferably, the mixed grinding beads include: zirconia beads and glass beads; wherein the addition ratio of the zirconia beads to the glass beads is (1-3):1.

[0016] Preferably, in step S1, the mass ratio of the nano hollow microspheres added by the first ultrasonic stirring to the nano hollow microspheres added by the second ultrasonic stirring is (2-4):1.

[0017] Preferably, in step S1, the time of the first ultrasonic stirring and the second ultrasonic stirring are independently selected from 1-2 hours, and the temperature is independently selected from 40-60°C.

[0018] Preferably, in step S2, the rotation speed of the high-speed dispersion treatment is 1200-1400 rpm, and the time is 1-2 hours.

[0019] The present invention adopts the above technical solution, which has the following technical effects compared with the prior art:

[0020] The present invention significantly improves the heat resistance and flame retardancy of the plant fiber mud by adding SiO2 gel. The nano hollow microspheres are filled in the pores of the SiO2 gel, which not only enhances the flame retardancy of the SiO2 gel but also prevents the SiO2 gel from excessive water absorption, and adjusts the humidity of the plant fiber mud to prevent excessive moisture and mold. The present invention reduces the accumulation of the nano hollow microspheres during the dispersion process by adding the nano hollow microspheres in batches, thereby enabling uniform dispersion in the SiO2 gel. The addition of potassium sodium silicate stabilizes the structure of the material. The addition of aloe vera gel improves the bonding strength between the plant fiber mud and the substrate. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other.

[0023] The present invention will be further described below with reference to specific examples, but they are not intended to limit the present invention.

[0024] Example 1

[0025] This embodiment provides a method for preparing plant fiber mud, the steps comprising:

[0026] S1. Weigh 10 parts of SiO2 gel and 15 parts of nano hollow microspheres by weight, place the SiO2 gel in a grinding device for pulverization, add potassium sodium silicate, 10 parts of the nano hollow microspheres and deionized water, and stir ultrasonically at 50°C for 1 hour. Then, add the remaining 5 parts of the nano hollow microspheres and stir ultrasonically at 60°C for 1 hour to obtain slurry A.

[0027] The pulverization process includes: performing preliminary pulverization of the SiO2 gel by dry grinding, and then adding mixed grinding beads (zirconia beads: glass beads = 2:1) and deionized water to perform wet grinding for 2 hours.

[0028] S2. Weigh plant fibers (10 parts of cotton fiber, 15 parts of straw fiber, and 5 parts of hemp fiber), 40 parts of diatomaceous earth, 10 parts of aloe vera gel, and additives (2 parts of defoamer, 1 part of dispersant, 2 parts of calcium powder, and 5 parts of kaolin) in parts by weight; place the plant fibers, aloe vera gel, and additives in a dispersing device, and disperse them at a high speed of 1200 rpm for 2 h. Then, add the diatomaceous earth and disperse evenly to obtain slurry B;

[0029] S3. Mix the slurry A and the slurry B, adjust the pH to weak alkalinity, and perform filtering and freeze-drying in sequence to obtain the plant fiber mud.

[0030] Example 2

[0031] This embodiment provides another method for preparing plant fiber mud, the steps comprising:

[0032] S1. Weigh 15 parts of SiO2 gel and 10 parts of nano hollow microspheres by weight, place the SiO2 gel in a grinding device for grinding, add potassium sodium silicate, 7 parts of the nano hollow microspheres and deionized water, and stir ultrasonically at 50°C for 1 hour. Then, add the remaining 3 parts of the nano hollow microspheres and stir ultrasonically at 60°C for 1 hour to obtain slurry A.

[0033] The pulverization process includes: performing preliminary pulverization of the SiO2 gel by dry grinding, and then adding mixed grinding beads (zirconia beads: glass beads = 1:1) and deionized water to perform wet grinding for 2 hours.

[0034] S2. Weigh plant fibers (20 parts of cotton fiber, 15 parts of hemp fiber, and 10 parts of eucalyptus fiber), 50 parts of diatomaceous earth, 10 parts of aloe vera gel, and additives (2 parts of defoamer, 1 part of dispersant, 2 parts of antioxidant, 1 part of coupling agent, 2 parts of calcium powder, 1 part of white cement, and 5 parts of kaolin) by weight; place the plant fibers, aloe vera gel, and additives in a dispersing device, disperse at a high speed of 1400 rpm for 1 h, add the diatomaceous earth, and disperse evenly to obtain slurry B;

[0035] S3. Mix the slurry A and the slurry B, adjust the pH to weak alkalinity, and perform filtering and freeze-drying in sequence to obtain the plant fiber mud.

[0036] Comparative Example 1

[0037] This comparative example provides another plant fiber mud, which does not contain SiO2 gel and nano hollow microspheres, and is otherwise the same as in Example 1.

[0038] Comparative Example 2

[0039] This comparative example provides another plant fiber mud, which does not contain nano hollow microspheres, and the rest is the same as Example 1.

[0040] Comparative Example 3

[0041] This comparative example provides another plant fiber mud, the components of which do not contain SiO2 gel, and the rest are the same as in Example 1.

[0042] Comparative Example 4

[0043] This comparative example provides another method for preparing plant fiber mud, the steps comprising:

[0044] S1, add all the hollow nanospheres at once and stir ultrasonically at 50°C for 1 hour, the rest is the same as in Example 1;

[0045] S2-S3 are the same as in Example 1.

[0046] Comparative Example 5

[0047] This comparative example provides another plant fiber mud, which does not contain aloe vera gel and is otherwise the same as in Example 1.

[0048] Detection Example

[0049] The plant fiber slurries of Examples 1-2 and Comparative Examples 1-4 were mixed with water in a ratio of 1:(3-7), stirred evenly, and then coated on the surface of a 100 mm × 100 mm plate with a coating thickness of 1-2 mm. After drying, the flammability test (GB8624-2012), moisture absorption test (GB / T35166-2017), antifungal performance (HG / T3950-2007), and adhesion test (GB / T5210-2006) were performed. The results are shown in Table 1.

[0050] Table 1

[0051]

[0052] Compared with Examples 1-2, Comparative Examples 1 and 3 did not add SiO2 gel, and their combustion performance level was the highest, and they were flammable materials. It can be seen that the addition of SiO2 gel can significantly improve the flame retardant properties of plant fiber mud; Comparative Example 2 did not add nano hollow microspheres, and the pore structure of SiO2 gel could not be filled, making the plant fiber mud more hygroscopic and providing a better growth environment for mold growth; the nano hollow microspheres in Comparative Example 4 were not added in batches, resulting in some nano hollow microspheres accumulating outside the SiO2 gel during the preparation process, and unable to fill the pores of the SiO2 gel, thereby causing a certain impact on the moisture absorption of the plant fiber mud; Comparative Example 5 did not add aloe vera gel, and its adhesion was significantly lower than that of the embodiment. It can be seen that the addition of aloe vera gel significantly improved the bonding strength of the plant fiber mud.

[0053] In summary, the present invention significantly improves the heat resistance and flame retardant properties of plant fiber mud by adding SiO2 gel. The nano hollow microspheres are filled in the pores of the SiO2 gel, which enhances the flame retardant properties of the SiO2 gel while preventing the SiO2 gel from excessive water absorption, and adjusts the humidity of the plant fiber mud to prevent excessive moisture and mold. The present invention reduces the accumulation of nano hollow microspheres during the dispersion process by adding nano hollow microspheres in batches, thereby enabling uniform dispersion in the SiO2 gel. The addition of potassium sodium silicate stabilizes the structure of the material.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of the present invention specification should be included in the protection scope of the present invention.

Claims

1. A plant fiber mud, characterized in that: By weight, the components include:

2. The plant fiber mud according to claim 1, characterized in that The plant fiber comprises at least one of coconut shell fiber, straw fiber, bamboo fiber, eucalyptus fiber, cotton fiber and hemp fiber.

3. The plant fiber mud according to claim 1, characterized in that The auxiliary agent includes at least one of a defoaming agent, a dispersant, an antifreeze agent, a mildew inhibitor, an antioxidant, a pigment and filler, and a coupling agent.

4. The plant fiber mud according to claim 3, characterized in that The pigment and filler include at least one of calcium powder, quartz powder, talcum powder, kaolin and white cement.

5. A method for preparing the plant fiber mud according to any one of claims 1 to 4, characterized in that the steps include: S1. Weighing SiO2 gel and nano hollow microspheres in parts by weight, placing the SiO2 gel in a grinding device for pulverization, adding potassium sodium silicate, a portion of the nano hollow microspheres, and deionized water, performing a first ultrasonic stirring, and then adding the remaining nano hollow microspheres and performing a second ultrasonic stirring to obtain slurry A; S2. Weigh plant fiber, diatomaceous earth, aloe vera gel, and an additive in parts by weight, place the plant fiber, the aloe vera gel, and the additive in a dispersion device for high-speed dispersion treatment, then add the diatomaceous earth and disperse evenly to obtain slurry B; S3. After mixing the slurry A and the slurry B, adjust the pH to weak alkalinity, and perform filtering and freeze-drying in sequence to obtain the plant fiber mud.

6. The preparation method according to claim 5, characterized in that In step S1, the pulverization process includes: performing preliminary pulverization of the SiO2 gel by dry grinding, and then adding mixed grinding beads and deionized water to perform wet grinding for 1-3 hours.

7. The preparation method according to claim 6, characterized in that The mixed grinding beads include: zirconium oxide beads and glass beads; wherein the addition ratio of the zirconium oxide beads to the glass beads is (1-3):

1.

8. The preparation method according to claim 5, characterized in that In step S1, the mass ratio of the nano hollow microspheres added by the first ultrasonic stirring to the nano hollow microspheres added by the second ultrasonic stirring is (2-4):

1.

9. The preparation method according to claim 5, characterized in that In step S1, the time of the first ultrasonic stirring and the second ultrasonic stirring are independently selected from 1-2 hours, and the temperature is independently selected from 40-60°C.

10. The preparation method according to claim 5, characterized in that In step S2, the rotation speed of the high-speed dispersion treatment is 1200-1400 rpm, and the time is 1-2 hours.

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