Aluminum honeycomb composite water storage foam material and preparation method thereof

Abstract

The invention discloses an aluminum honeycomb composite water storage foam material and a preparation method thereof, and belongs to the technical field of water storage material preparation. In order to solve the problems of uncontrollable water storage foam position, non-uniform water storage capacity distribution and unreliable bonding strength of the aluminum honeycomb and other structures in the prior art, the technical means of foam distribution control by a placeholder M, pre-water-absorption resin particle treatment and low-temperature foam preparation are mainly adopted. By accurately controlling the foam filling position, the expansion and stability of the water-absorbent resin particles are ensured, the uniformity and strength of the water storage foam in the aluminum honeycomb grid are ensured, the production operability and efficiency are improved, and the structural stability and the long-term use reliability of a final product are enhanced.

Description

Technical Field

[0001] The invention specifically relates to an aluminum honeycomb composite water storage foam material and a preparation method thereof, and belongs to the technical field of water storage material preparation. Background Art

[0002] Filling and preparing water storage foam in aluminum honeycomb can effectively utilize the structural strength of aluminum honeycomb and the water storage characteristics of water storage foam, realize the combination of structure and function, and expand the application reliability of water storage foam. However, under the existing technology, it can only realize the complete filling of water storage foam in aluminum honeycomb lattice, and cannot economically meet the demand for controllable filling at a specified depth position in aluminum honeycomb lattice. By first completely filling and then physically removing, it is basically possible to controllably fill water storage foam at a specified depth position in aluminum honeycomb lattice, but there are two major problems: first, physical removal needs to be carried out one by one in honeycomb lattice, which is time-consuming, labor-intensive, costly, and difficult to control, and the physical removal process will cause physical damage to the honeycomb lattice, seriously affecting the strength of the honeycomb; second, the physical removal method cannot remove the adhesion of water storage foam on the wall of honeycomb lattice, making the surface of honeycomb lattice not clean enough, affecting the ability of the upper and lower surfaces of aluminum honeycomb to be further reliably bonded to other structures. Therefore, there is an urgent need for a method for controllably preparing water storage foam in aluminum honeycomb. Summary of the invention

[0003] The purpose of the present invention is to provide an aluminum honeycomb composite water storage foam material and a preparation method thereof, so as to solve the problems existing in the prior art that the water storage foam position is uncontrollable, the water storage capacity is unevenly distributed, and the subsequent unreliable bonding strength between the upper and lower surfaces of the aluminum honeycomb and other structures is unreliable.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for preparing an aluminum honeycomb composite water storage foam material comprises the following steps:

[0006] (1) Aluminum honeycomb single-side closed spacer: The aluminum honeycomb is placed flat in the spacer M for solidification to obtain an aluminum honeycomb with single-side closed spacer;

[0007] (2) Aluminum honeycomb single-side wrapped placeholder: Place the unoccupied side of the aluminum honeycomb flat in the placeholder M, dip it in the placeholder, take it out horizontally, and solidify it to form a wrapped placeholder. Repeat the operation to obtain an aluminum honeycomb with single-side wrapped placeholder;

[0008] (3) pre-absorption of water by the water-absorbent resin particles: saturating the water-absorbent resin particles with water and then freezing them to obtain frozen water-absorbent resin particles;

[0009] (4) Preparation of water storage foam in aluminum honeycomb: In an environment below room temperature, frozen water-absorbing resin particles are mixed with foaming material A to obtain mixture C, foaming material B is uniformly mixed with a cell-opening agent to obtain mixture D, and mixture C and mixture D are mixed to obtain mixture E; mixture E is then poured into a grid of a single-side wrapped aluminum honeycomb to foam mixture E to obtain a composite of water storage foam and aluminum honeycomb;

[0010] (5) Removal of spacer: The spacer M on the composite is removed and freeze-dried to obtain an aluminum honeycomb composite water storage foam material.

[0011] Furthermore, in step (1), the immersion depth of the placeholder M in the aluminum honeycomb is not less than 2 mm; after curing, the placeholder M is in contact with the wall of the aluminum honeycomb but not bonded, and the material used is aluminum rubber.

[0012] Furthermore, in step (2), the attachment thickness of the spacer M in the aluminum honeycomb infiltration area reaches more than 1 mm.

[0013] Furthermore, in step (2), the immersion depth of the spacer M in the aluminum honeycomb is not less than 2 mm.

[0014] Furthermore, in step (3), the water-absorbing resin particles are selected from polymer water-absorbing resin (SAP) with a particle size of 100 to 200 meshes.

[0015] Furthermore, the weight of water in step (3) is the theoretical saturated water absorption capacity of the water-absorbing resin particles.

[0016] Furthermore, the freezing treatment temperature in step (3) is below 0°C.

[0017] Furthermore, in step (4), the ambient temperature lower than room temperature is 0 to 10°C.

[0018] Furthermore, in step (4), the foaming materials A and B are polyurethane foaming materials with a solidification point greater than 0°C.

[0019] Furthermore, the pore opening agent in step (4) has surfactant characteristics.

[0020] Furthermore, in step (4), the mass ratio of the foaming materials A, B and the cell opening agent is (30-100):(40-100):(1-2).

[0021] Furthermore, in step (4), the amount of frozen water-absorbing resin added is 10 to 20 times the total weight of the foaming materials A and B.

[0022] An aluminum honeycomb composite water storage foam material is prepared by the above preparation method.

[0023] The present invention has achieved the following beneficial effects:

[0024] 1. The present invention can accurately control the position of the water storage foam in the aluminum honeycomb grid by using the spacer M, so that the distribution of the foam is more uniform, avoiding the adhesion and contamination of the foam in the non-water storage area, thereby ensuring the accurate filling and uniformity of the water storage foam in the aluminum honeycomb grid.

[0025] 2. The present invention applies spacers M on different sides of the aluminum honeycomb and adopts a combination of closed spacers and wrapped spacers to effectively protect the side walls of the aluminum honeycomb from being contaminated by the attachment of water storage foam, and leaves an injection channel to ensure that the water storage foam can be smoothly injected and completely fill the aluminum honeycomb grid, thereby improving the operability and efficiency of production.

[0026] 3. The present invention performs a pre-water absorption treatment on the water-absorbing resin particles to ensure that the water-absorbing resin particles can fully expand to the theoretical maximum volume and be completely contained in the foam, thereby avoiding the situation where the water-absorbing resin particles are damaged or unable to fully absorb water during the foaming process, thereby enhancing the structural strength and functional stability of the foam.

[0027] 4. The present invention effectively reduces the reaction speed of foaming material A and foaming material B by mixing and injecting the foam material at an ambient temperature of 0°C to 10°C, expands the operation window, avoids premature foaming of the foam, ensures that the mixed material E can be fully injected into the aluminum honeycomb grid, ensures that the water-stored foam can completely fill the aluminum honeycomb, and avoids the phenomenon that the bubbles fail to completely fill the grid.

[0028] 5. The present invention can effectively prevent the water storage foam from contaminating the upper and lower surfaces of the aluminum honeycomb by controlling the immersion depth of the spacer M, thereby ensuring the reliable bonding strength between the aluminum honeycomb and other structures, and ensuring the structural stability and long-term reliability of the final product.

[0029] 6. The present invention can achieve the original position and original volume existence of the water-absorbing particles in the pores of the water storage foam through freeze drying, thereby ensuring that the dried water-absorbing resin particles will not fall out of the dried water storage foam, thereby avoiding the reduction or uneven distribution of the water-absorbing particles due to vibration in a multiple repeated use environment. DETAILED DESCRIPTION

[0030] In order to make the various technical features and advantages or technical effects in the above technical solutions of the present invention more obvious and easy to understand, they are described in detail below in conjunction with embodiments.

[0031] Example 1

[0032] (1) Aluminum honeycomb single-side closed spacer: The aluminum honeycomb is placed flat in the spacer M (non-stick aluminum silicone rubber) for curing. The immersion depth of the spacer M in the aluminum honeycomb is 2 mm, and a single-side closed spacer is obtained.

[0033] (2) Single-side wrapped aluminum honeycomb placeholder: Place the unoccupied side of the aluminum honeycomb flat in the placeholder M, dip it in the placeholder, and take it out horizontally. After solidification, it forms a wrapped placeholder. Repeat the operation. The adhesion thickness of the placeholder M in the aluminum honeycomb wetting area is 1 mm, and the immersion depth of the placeholder M in the aluminum honeycomb is 2 mm, thus obtaining a single-side wrapped aluminum honeycomb.

[0034] (3) Pre-absorption of water by water-absorbent resin particles: water-absorbent resin particles (commercially available SAP, particle size range 100-200 mesh) are saturated with water and then frozen at -10°C to obtain frozen water-absorbent resin particles.

[0035] (4) Preparation of water storage foam in aluminum honeycomb: In a low temperature environment of 0°C, frozen water-absorbent resin particles are mixed with foaming material A (commercially available isocyanate) to obtain mixture C, foaming material B (commercially available composite polyether) and pore-opening agent (general pore-opening agent for low-activity polyurethane) are uniformly mixed to obtain mixture D, and then mixture C and mixture D are mixed to obtain mixture E, wherein the mass ratio of foaming materials A, B and pore-opening agent is 100:100:2, and the amount of frozen water-absorbent resin added is 20 times the total weight of foaming materials A and B; and mixture E is poured into the grid of the aluminum honeycomb with single-side wrapping to foam mixture E to obtain a composite of water storage foam and aluminum honeycomb.

[0036] (5) Removal of spacer: The spacer M on the composite is removed and freeze-dried to obtain a water-containing aluminum honeycomb composite water storage foam material.

[0037] The test showed that the aluminum honeycomb composite water storage foam material prepared had a clean surface in the unfoamed area, no foaming material pollution and no spacer residue, and a comprehensive density of 0.095g / cm 3 The heat-resistant temperature is greater than 180℃, the volume water content after saturated water absorption is 75%, and the water-storage foam is firmly in the aluminum honeycomb. After 5 cycles of water absorption and release, no excess foam and water-absorbing resin particles fall off.

[0038] Example 2

[0039] (1) Aluminum honeycomb single-side closed spacer: The aluminum honeycomb is placed flat in the spacer M (non-stick aluminum silicone rubber) for curing. The immersion depth of the spacer M in the aluminum honeycomb is 2 mm, and a single-side closed spacer is obtained.

[0040] (2) Single-side wrapped aluminum honeycomb placeholder: Place the unoccupied side of the aluminum honeycomb flat in the placeholder M, dip it in the placeholder, and take it out horizontally. After solidification, it forms a wrapped placeholder. Repeat the operation. The adhesion thickness of the placeholder M in the aluminum honeycomb wetting area is 2 mm, and the immersion depth of the placeholder M in the aluminum honeycomb is 2 mm, thus obtaining a single-side wrapped aluminum honeycomb.

[0041] (3) Pre-absorption of water by water-absorbent resin particles: water-absorbent resin particles (commercially available SAP, particle size range 100-200 mesh) are saturated with water and then frozen at -2°C to obtain frozen water-absorbent resin particles.

[0042] (4) Preparation of water storage foam in aluminum honeycomb: Under a low temperature environment of 10°C, frozen water-absorbing resin particles are mixed with foaming material A (commercially available isocyanate) to obtain mixture C, foaming material B (commercially available composite polyether) and pore-opening agent (general pore-opening agent for low-activity polyurethane) are uniformly mixed to obtain mixture D, and then mixture C and mixture D are mixed to obtain mixture E, wherein the mass ratio of foaming materials A, B and pore-opening agent is 90:100:2, and the amount of frozen water-absorbing resin added is 20 times the total weight of foaming materials A and B; mixture E is then poured into the grid of the aluminum honeycomb with a single-side wrapped occupancy, and mixture E is foamed to obtain a composite of water storage foam and aluminum honeycomb.

[0043] (5) Removal of spacer: The spacer M on the composite is removed and freeze-dried to obtain a water-containing aluminum honeycomb composite water storage foam material.

[0044] The test showed that the aluminum honeycomb composite water storage foam material prepared had a clean surface in the unfoamed area, no foaming material pollution and no spacer residue, and a comprehensive density of 0.090g / cm 3 The heat-resistant temperature is greater than 180℃, the volume water content after saturated water absorption is 72%, and the water-storage foam is firmly in the aluminum honeycomb. After 5 cycles of water absorption and release, no excess foam and water-absorbing resin particles fall off.

[0045] Example 3

[0046] (1) Aluminum honeycomb single-side closed spacer: The aluminum honeycomb is placed flat in the spacer M (non-stick aluminum silicone rubber) for curing. The immersion depth of the spacer M in the aluminum honeycomb is 10 mm, and a single-side closed spacer is obtained.

[0047] (2) Single-side wrapped aluminum honeycomb placeholder: Place the unoccupied side of the aluminum honeycomb flat in the placeholder M, dip it in the placeholder, and take it out horizontally. After solidification, it forms a wrapped placeholder. Repeat the operation. The adhesion thickness of the placeholder M in the aluminum honeycomb wetting area is 2 mm, and the immersion depth of the placeholder M in the aluminum honeycomb is 2 mm, thus obtaining a single-side wrapped aluminum honeycomb.

[0048] (3) Pre-absorption of water by water-absorbent resin particles: water-absorbent resin particles (commercially available SAP, particle size range 100-150 mesh) are saturated with water and then frozen at -15°C to obtain frozen water-absorbent resin particles.

[0049] (4) Preparation of water storage foam in aluminum honeycomb: Under a low temperature environment of 5°C, frozen water-absorbing resin particles are mixed with foaming material A (commercially available isocyanate) to obtain mixture C, foaming material B (commercially available composite polyether) and pore opening agent (universal pore opening agent for low-activity polyurethane) are uniformly mixed to obtain mixture D, and then mixture C and mixture D are mixed to obtain mixture E, wherein the mass ratio of foaming materials A, B and pore opening agent is 30:40:1, and the amount of frozen water-absorbing resin added is 10 times the total weight of foaming materials A and B; mixture E is then poured into the grid of the aluminum honeycomb with a single-side wrapped occupancy, and mixture E is foamed to obtain a composite of water storage foam and aluminum honeycomb.

[0050] (5) Removal of spacer: The spacer M on the composite is removed and freeze-dried to obtain a water-containing aluminum honeycomb composite water storage foam material.

[0051] After testing, the aluminum honeycomb composite water storage foam material prepared has a clean surface in the unfoamed area, no foaming material pollution and no spacer residue, and a comprehensive density of 0.115g / cm 3 The heat-resistant temperature is greater than 180℃, the volume water content after saturated water absorption is 40%, and the water-storage foam is firmly in the aluminum honeycomb. After 5 cycles of water absorption and release, no excess foam and water-absorbing resin particles fall off.

[0052] Comparative Example 1

[0053] The difference from Example 1 is that: no placeholder is used, but the intended placeholder area is manually cleaned after the foaming is completed; the water-absorbing resin particles are not pre-absorbed, frozen, or freeze-dried.

[0054] After testing, the aluminum honeycomb composite water storage foam material prepared, after the intended occupation area was manually cleaned, the aluminum honeycomb surface had residual foam and mixed with water-absorbing resin particles, and the aluminum honeycomb side wall was damaged and deformed to varying degrees during the cleaning process. Comprehensive density 0.090g / cm 3 The heat-resistant temperature is greater than 180℃, the volume water content after saturated water absorption is 73%, and the water-storage foam is firmly in the aluminum honeycomb. After 5 cycles of water absorption and release, the foam is damaged by the expansion of the water-absorbing resin particles, and more foam and water-absorbing resin particles fall off.

[0055] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Appropriate modifications or equivalent substitutions of the technical solutions of the present invention made by ordinary technicians in the field should all be included in the protection scope of the present invention. The protection scope of the present invention shall be based on what is defined in the claims.

Claims

1. A method for preparing an aluminum honeycomb composite water storage foam material, characterized in that: The following steps are involved: (1) Placing the aluminum honeycomb flat in the spacer M for solidification to obtain a single-side closed spacer aluminum honeycomb; (2) Place the unoccupied side of the aluminum honeycomb flatly in the spacer M, dip it in the spacer, take it out horizontally, and solidify it to form a wrapped spacer. Repeat the operation to obtain an aluminum honeycomb with a single-side wrapped spacer. (3) saturating the water-absorbing resin particles with water and then freezing them to obtain frozen water-absorbing resin particles; (4) In an environment below room temperature, the frozen water-absorbing resin particles are mixed with the foaming material A to obtain a mixture C, the foaming material B is uniformly mixed with the cell-opening agent to obtain a mixture D, and the mixture C is mixed with the mixture D to obtain a mixture E; the mixture E is then poured into the grid of the aluminum honeycomb with a single-side wrapping type occupying position, and the mixture E is foamed to obtain a composite of water storage foam and the aluminum honeycomb; (5) removing the spacer M on the composite and performing freeze drying to obtain an aluminum honeycomb composite water storage foam material.

2. The method according to claim 1, characterized in that In step (1), the immersion depth of the spacer M in the aluminum honeycomb is not less than 2 mm; after curing, the spacer M is in contact with the wall of the aluminum honeycomb but not bonded, and the material used is aluminum rubber.

3. The method according to claim 1, characterized in that In step (2), the attachment thickness of the spacer M in the aluminum honeycomb infiltration area reaches more than 1 mm, and the immersion depth of the spacer M in the aluminum honeycomb is not less than 2 mm.

4. The method according to claim 1, characterized in that In step (3), the water-absorbing resin particles are selected from polymer water-absorbing resins with a particle size of 100 to 200 meshes.

5. The method according to claim 1, characterized in that The freezing treatment temperature in step (3) is below 0°C.

6. The method according to claim 1, characterized in that The ambient temperature below room temperature in step (4) is 0 to 10°C.

7. The method according to claim 1, characterized in that In step (4), the foaming materials A and B are polyurethane foaming materials with a solidification point greater than 0°C.

8. The method according to claim 1, characterized in that In step (4), the mass ratio of the foaming materials A, B and the cell opening agent is (30-100):(40-100):(1-2).

9. The method according to claim 1, characterized in that In step (4), the amount of frozen water-absorbing resin added is 10 to 20 times the total weight of the foaming materials A and B.

10. An aluminum honeycomb composite water storage foam material, characterized in that: The invention is prepared by the preparation method according to any one of claims 1 to 9.