CN112724908A - Aerogel modified glue solution and preparation method thereof - Google Patents
Aerogel modified glue solution and preparation method thereof Download PDFInfo
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- CN112724908A CN112724908A CN202011606877.7A CN202011606877A CN112724908A CN 112724908 A CN112724908 A CN 112724908A CN 202011606877 A CN202011606877 A CN 202011606877A CN 112724908 A CN112724908 A CN 112724908A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a preparation method of aerogel modified glue solution, which comprises the following steps: (1) preparing an aerogel water dispersion; (2) taking a certain amount of water-based polyurethane adhesive, stirring the water-based polyurethane adhesive by using a stirring device, and adding a proper amount of cosolvent under stirring to prepare a first mixture; (3) adding the aerogel aqueous dispersion prepared in the step (1) into the first mixture in the step (2), and continuing stirring after the addition is finished to prepare a second mixture; (4) putting the second mixture mixed in the step (3) and the container into an ultrasonic device for ultrasonic oscillation operation; (5) standing; (6) and removing the sediment at the bottom of the container, and collecting the emulsion with uniform upper layer, thereby obtaining the aerogel modified glue solution. The aerogel modified glue solution prepared by the method can effectively improve the bonding performance and the heat conduction performance so as to give full play to the bulletproof performance of the material.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to aerogel modified glue solution and a preparation method thereof.
Background
The ultra-high molecular weight polyethylene laid fabric is a composite material mainly composed of ultra-high molecular weight polyethylene fibers and a polyurethane resin adhesive, and is mainly used for producing bulletproof and explosion-proof equipment such as body armor, bulletproof helmets, bulletproof plates, explosion-proof blankets and the like. The main reason why the ultra-high molecular weight polyethylene laid fabric can be used for bullet prevention and explosion prevention is that the ultra-high molecular weight polyethylene laid fabric has large specific energy absorption and can absorb the energy of bullets by breaking the ultra-high molecular weight polyethylene fibers with high strength and high modulus. However, when a bullet which is attacked at a high speed contacts a bulletproof product made of high-strength polyethylene non-woven fabric, besides impact on the material caused by kinetic energy, heat energy is generated due to high-speed friction, so that the temperature of the material is high rapidly, and the high temperature can be conducted to the periphery and the rear part rapidly along the radial direction and the weft direction of a plurality of layers of non-woven fabric materials, so that the performance of the high-strength high-modulus polyethylene fiber is reduced, and the bullet-proof effect is not good for full play.
The bonding force between the adhesive and the fiber and the heat transfer rate of the product are improved, and the impact resistance of the non-woven fabric is favorably improved.
Disclosure of Invention
The invention aims to provide an aerogel modified glue solution and a preparation method thereof, which solve one or more of the problems in the prior art.
On one hand, the preparation method of the aerogel modified glue solution provided by the invention is prepared from a water-based polyurethane adhesive, aerogel and an auxiliary agent, wherein the auxiliary agent comprises one or more of a cosolvent, a penetrating agent, a defoaming agent and a tackifier; the method comprises the following steps:
(1) preparing an aerogel water dispersion: adding a certain amount of penetrant, defoamer and tackifier into deionized water, stirring uniformly, then gradually adding a certain amount of aerogel under stirring, and continuing stirring after completely adding the aerogel;
(2) taking a certain amount of water-based polyurethane adhesive, stirring the water-based polyurethane adhesive by using a stirring device, and adding a proper amount of cosolvent under stirring to prepare a first mixture;
(3) adding the aerogel aqueous dispersion prepared in the step (1) into the first mixture in the step (2), and continuing stirring after the addition is finished to prepare a second mixture;
(4) putting the second mixture mixed in the step (3) and the container into an ultrasonic device for ultrasonic oscillation operation;
(5) standing;
(6) and removing the sediment at the bottom of the container, and collecting the emulsion with uniform upper layer, thereby obtaining the aerogel modified glue solution.
In certain embodiments, the stirring speed for continuing stirring after the aerogel is completely added in step (1) is 1000rpm, and the stirring time is not less than 10 min.
In certain embodiments, the stirring speed in step (2) is not higher than 60 rpm.
In certain embodiments, the time for continuing stirring after the addition in step (3) is 30min or more.
In certain embodiments, the time of ultrasonic oscillation in step (4) is more than 30min, and the power of ultrasonic wave is not less than 3 KW.
In certain embodiments, the standing time in step (5) is 48 h.
In certain embodiments, the water-based polyurethane adhesive has a solids content of 20% to 80%.
In certain embodiments, the water-based polyurethane adhesive has a solids content of 30% to 50%.
In certain embodiments, the pH of the water-based polyurethane adhesive is from 6 to 8.
In certain embodiments, the aerogel particle size distribution has a D50 value of < 10um and a pH of 6 to 8.
In certain embodiments, the aerogel pore size less than 50 nm.
In certain embodiments, the aerogel pore size ≦ 30 nm.
In certain embodiments, the aerogel has a porosity of 70% or greater.
In certain embodiments, the aerogel has a porosity of 80% or greater.
In certain embodiments, the aerogel has a porosity of greater than or equal to 90%.
In certain embodiments, the aerogel comprises from 0.1% to 10% by weight of the adhesive.
In certain embodiments, the aerogel comprises from 0.15% to 6% by weight of the adhesive.
In certain embodiments, the aerogel comprises 1% to 3% by weight of the adhesive.
In certain embodiments, the co-solvent is selected from one or more of xylene, acetone, n-butanol, propylene glycol ethyl ether.
In certain embodiments, the co-solvent is selected from acetone.
In certain embodiments, the co-solvent comprises from 0.1% to 5% by weight of the entire gum solution system.
In certain embodiments, the cosolvent comprises 1% to 3% by weight of the overall gum solution system.
Wherein: cosolvents are a class of materials that promote uniform dispersion of polyurethanes and aerogels in water-based systems.
In certain embodiments, the penetrant is present in an amount of 0.5% to 5% by weight of the total glue system.
Wherein: the penetrating agent is a surfactant substance, and can improve the penetrating speed of the glue solution on the fiber tows;
the defoaming agent has the functions of: so as to reduce air bubbles in the slurry and enhance the strength of the prepared non-woven fabric.
In certain embodiments, the weight ratio of aerogel to water in step (1) is from 1% to 30%.
In certain embodiments, the weight ratio of aerogel to water in step (1) is from 10% to 20%.
On the other hand, the aerogel modified glue solution provided by the invention is prepared by the preparation method, and comprises the following steps:
(1) preparing an aerogel water dispersion: adding a certain amount of penetrant, defoamer and tackifier into deionized water, stirring uniformly, then gradually adding a certain amount of aerogel under stirring, and continuing stirring after completely adding the aerogel;
(2) taking a certain amount of water-based polyurethane adhesive, stirring the water-based polyurethane adhesive by using a stirring device, and adding a proper amount of cosolvent under stirring to prepare a first mixture;
(3) adding the aerogel aqueous dispersion prepared in the step (1) into the first mixture in the step (2), and continuing stirring after the addition is finished to prepare a second mixture;
(4) putting the second mixture mixed in the step (3) and the container into an ultrasonic device for ultrasonic oscillation operation;
(5) standing;
(6) and removing the sediment at the bottom of the container, and collecting the emulsion with uniform upper layer, thereby obtaining the aerogel modified glue solution.
Has the advantages that: the preparation method of the aerogel modified glue solution is simple and easy to operate, and the aerogel modified glue solution prepared by the method can effectively improve the bonding performance and the heat conduction performance, so that the temperature resistance of the high-strength polyethylene weftless fabric material is improved, the conduction speed of heat in the high-strength polyethylene weftless fabric material is reduced, the influence on places except the impact position of the high-strength polyethylene weftless fabric bulletproof material is reduced as much as possible, and the bulletproof performance of the material is fully exerted.
Detailed Description
The present invention will be described in further detail below with reference to embodiments.
Example 1
1. Preparing modified glue solution:
(1) preparing an aerogel water dispersion: adding 3.0g of penetrating agent, 3.0g of defoaming agent and 3.0g of tackifier into 70g of deionized water, uniformly stirring, gradually adding 7.5g of aerogel under stirring, and continuously stirring for 30min after completely adding, wherein the stirring speed is 1000 rpm;
(2) stirring 500g of a commercially available 330-type water-based polyurethane adhesive with a solid content of 30% by using a stirring device, and adding 5.8g of a cosolvent under stirring at a stirring speed of 40rpm to prepare a first mixture;
(3) adding the aerogel aqueous dispersion prepared in the step (1) into the first mixture in the step (2), and continuing stirring for 40min after the addition is finished to prepare a second mixture;
(4) putting the second mixture mixed in the step (3) and the container into an ultrasonic device with the power of 3kw for ultrasonic oscillation for 60 min;
(5) taking out and standing for 48 h;
(6) and removing the sediment at the bottom of the container, and collecting the emulsion with uniform upper layer, thereby obtaining the aerogel modified glue solution.
2. And preparing the non-woven cloth and the target sheet, and performing a comparative targeting test.
The aerogel prepared by the method is changedAqueous polyurethane adhesive and ultra-high molecular weight polyethylene fiber (produced by Jiujiu science and technology Limited of Jiangsu, with the specification of 800D/240F, the breaking strength of 37cN/dtex, the initial modulus of 1400cN/dtex, the elongation at break of 3.6 percent) are manufactured on a no-weft cloth production machine, and the areal density of 80g/m is manufactured2Left and right non-woven cloth with single warp and single weft structure with silk content of 85-90%, cutting the non-woven cloth into 40cm by 40cm, and laminating to obtain non-woven cloth with total surface density of 6kg/m2The left and right test target pieces are 2 (75 layers of non-woven cloth for each target piece) and are numbered as 1# and 2 #.
Example 2
1. Preparing modified glue solution:
(1) preparing an aerogel water dispersion: adding 18g of penetrating agent, 8g of defoaming agent and 5g of tackifier into 70g of deionized water, uniformly stirring, then gradually adding 7.5g of aerogel under stirring, and continuously stirring for 20min after completely adding, wherein the stirring speed is 1000 rpm;
(2) stirring 500g of a commercially available 330-type water-based polyurethane adhesive with a solid content of 30% by using a stirring device, adding 11.6g of a cosolvent under stirring, and stirring at a rotating speed of 40rpm to obtain a first mixture;
(3) adding the aerogel aqueous dispersion prepared in the step (1) into the first mixture in the step (2), and continuing stirring for 50min after the addition is finished to prepare a second mixture;
(4) putting the second mixture mixed in the step (3) and the container into an ultrasonic device with the power of 3kw for ultrasonic oscillation for 30 min;
(5) taking out and standing for 48 h;
(6) and removing the sediment at the bottom of the container, and collecting the emulsion with uniform upper layer, thereby obtaining the aerogel modified glue solution.
2. And preparing the non-woven cloth and the target sheet, and performing a comparative targeting test.
The prepared aerogel modified water-based polyurethane adhesive and the prepared ultra-high molecular weight polyethylene fiber (produced by Jiujiu science and technology Co., Ltd. of Jiangsu, the specification is 800D/240F, the breaking strength is 37cN/dtex, the initial modulus is 1400cN/dtex, and the elongation at break is 3.6 percent) are utilized to manufacture the flour on a weftless fabric production machineDensity 80g/m2Left and right non-woven cloth with single warp and single weft structure with silk content of 85-90%, cutting the non-woven cloth into 40cm by 40cm, and laminating to obtain non-woven cloth with total surface density of 6kg/m2The left and right test target pieces are 2 (75 layers of non-woven cloth for each target piece) and are numbered as 3# and 4 #.
Example 3
1. Preparing modified glue solution:
(1) preparing an aerogel water dispersion: adding 30g of penetrating agent, 3.0g of defoaming agent and 6g of tackifier into 70g of deionized water, uniformly stirring, gradually adding 7.5g of aerogel under stirring, and continuously stirring for 10min after completely adding, wherein the stirring speed is 1000 rpm;
(2) stirring 500g of a commercially available 330-type water-based polyurethane adhesive with a solid content of 30% by using a stirring device, adding 17g of a cosolvent under stirring, and stirring at a rotation speed of 60rpm to obtain a first mixture;
(3) adding the aerogel aqueous dispersion prepared in the step (1) into the first mixture in the step (2), and continuing stirring for 60min after the addition is finished to prepare a second mixture;
(4) putting the second mixture mixed in the step (3) and the container into an ultrasonic device with the power of 4kw for ultrasonic oscillation for 60 min;
(5) taking out and standing for 48 h;
(6) and removing the sediment at the bottom of the container, and collecting the emulsion with uniform upper layer, thereby obtaining the aerogel modified glue solution.
2. And preparing the non-woven cloth and the target sheet, and performing a comparative targeting test.
The prepared aerogel modified water-based polyurethane adhesive and the ultra-high molecular weight polyethylene fiber (produced by Jiujiu science and technology Co., Ltd. of Jiangsu, the specification is 800D/240F, the breaking strength is 37cN/dtex, the initial modulus is 1400cN/dtex, and the elongation at break is 3.6 percent) are utilized to manufacture the surface density of 80g/m on a weftless fabric production machine2Left and right non-woven cloth with single warp and single weft structure with silk content of 85-90%, cutting the non-woven cloth into 40cm by 40cm, and laminating to obtain non-woven cloth with total surface density of 6kg/m22 test target pieces (75 layers of non-woven cloth for each target piece) are arranged on the left and the right,numbered 5# and 6 #.
Comparative example 1
The non-woven cloth for comparison is made on a non-woven cloth production machine by using unmodified water-based polyurethane adhesive with the conventional type 330 and the ultra-high molecular weight polyethylene fiber with the same specification, and the surface density is 80g/m2About, the glue content is 85-90%, the structure single warp and single weft are prepared into 2 pieces with the total surface density of 6.0kg/m2The test target pieces on the left and right are numbered as 7# and 8 #.
Performance testing
The test pieces prepared in examples 1 to 3 and comparative example 1 were subjected to the shooting test under the same conditions, wherein the firearm used in the test was a 54 pistol, the bullet was a 51-type 7.62mm lead bullet, the ejection speed was 455. + -.5 m/s, 6 guns were tested per piece, and the average number of layers penetrated by 6 bullets after 8 pieces of the test pieces was compared, and the specific test results are shown in Table 1:
TABLE 1
As can be seen from table 1, the average number of penetration layers of 6 target pieces prepared based on the aerogel-modified glue solution was 9.2, 9.8, 9.2, 10.0, 9.0, and 9.7, respectively; the average number of penetrating layers of 2 target pieces prepared based on the conventional adhesive was 11.1 and 10.7, respectively. That is, the modified adhesive significantly reduces the average number of penetrating layers by about 15% under the same test conditions, meaning that the ballistic resistant article can be reduced by about 15% with the same protective capacity.
In summary, the following steps: the preparation method of the aerogel modified glue solution is simple and easy to operate, and the aerogel modified glue solution prepared by the method can effectively improve the bonding performance and the heat conduction performance, so that the temperature resistance of the high-strength polyethylene weftless fabric material is improved, the conduction speed of heat in the high-strength polyethylene weftless fabric material is reduced, the influence on places except the impact position of the high-strength polyethylene weftless fabric bulletproof material is reduced as much as possible, and the bulletproof performance of the material is fully exerted.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these should be considered as within the scope of the present invention.
Claims (10)
1. The preparation method of the aerogel modified glue solution comprises the steps of preparing a water-based polyurethane adhesive, aerogel and an auxiliary agent, wherein the auxiliary agent comprises one or more of a cosolvent, a penetrating agent, a defoaming agent and a tackifier; the method is characterized by comprising the following steps:
(1) preparing an aerogel water dispersion: adding a certain amount of penetrant, defoamer and tackifier into deionized water, stirring uniformly, then gradually adding a certain amount of aerogel under stirring, and continuing stirring after completely adding the aerogel;
(2) taking a certain amount of water-based polyurethane adhesive, stirring the water-based polyurethane adhesive by using a stirring device, and adding a proper amount of cosolvent under stirring to prepare a first mixture;
(3) adding the aerogel aqueous dispersion prepared in the step (1) into the first mixture in the step (2), and continuing stirring after the addition is finished to prepare a second mixture;
(4) putting the second mixture mixed in the step (3) and the container into an ultrasonic device for ultrasonic oscillation operation;
(5) standing;
(6) and removing the sediment at the bottom of the container, and collecting the emulsion with uniform upper layer, thereby obtaining the aerogel modified glue solution.
2. The method of claim 1, wherein the water-based polyurethane adhesive has a solids content of 20% to 80%, preferably 30% to 50%.
3. The method of claim 2, wherein the water-based polyurethane adhesive has a pH of 6 to 8.
4. The preparation method according to claim 1, wherein the aerogel particle size distribution has a D50 value of less than 10um and a pH value of 6-8.
5. The method according to claim 4, wherein the pore size of the aerogel is less than or equal to 50nm, preferably less than or equal to 30 nm; the porosity of the aerogel is more than or equal to 70%, preferably the porosity of the aerogel is more than or equal to 80%, and more preferably the porosity of the aerogel is more than or equal to 90%.
6. The method according to claim 1, wherein the weight ratio of the aerogel to the water-based polyurethane adhesive is 0.1-10%, preferably 0.15-6%, and more preferably 1-3%.
7. The preparation method according to claim 1, wherein the cosolvent is selected from one or more of xylene, acetone, n-butanol and propylene glycol ethyl ether, preferably acetone, more preferably the cosolvent accounts for 0.1 to 5 percent, more preferably 1 to 3 percent of the weight of the whole glue solution system.
8. The preparation method according to claim 1, wherein the penetrating agent accounts for 0.5-5% of the whole glue solution system by weight.
9. The method according to claim 1, wherein the weight ratio of the aerogel in the step (1) to the water is 1% to 30%, preferably 10% to 20%.
10. Aerogel modified glue solution prepared by the preparation method according to any one of claims 1 to 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116658710A (en) * | 2023-07-31 | 2023-08-29 | 威海拓力莱纤维有限公司 | Puncture-preventing carbon fiber composite pipe fitting |
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| CN107267104A (en) * | 2016-04-08 | 2017-10-20 | 卢斌 | Transparent heat-insulated fireproof gum of a kind of aerogel-congtg and preparation method thereof and insulating fire-retarding glass |
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| US20200339762A1 (en) * | 2019-04-29 | 2020-10-29 | Taiwan Aerogel Technology Material Co., Ltd. | Modified aerogel powder with special function group for use in plastic composite and fiber spinning and preparation method thereof |
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| CN108384440A (en) * | 2018-03-22 | 2018-08-10 | 重庆知遨科技有限公司 | A kind of shellproof anti-explosion, anti-corrosion coating |
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| CN116658710A (en) * | 2023-07-31 | 2023-08-29 | 威海拓力莱纤维有限公司 | Puncture-preventing carbon fiber composite pipe fitting |
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