Antibacterial sleep-aiding latex pillow and preparation method thereof

Abstract

The invention discloses an antibacterial sleep-aiding latex pillow and a preparation method thereof, and relates to the technical field of latex. Silicon dioxide is preliminarily modified through 4-trimethoxysilylbutyraldehyde, m-phenylenediamine-sodium sulfonate and triphosgene, the antibacterial and anti-dust effects can be achieved, then natural silk fibroin and collagen are used for further modification, performance is improved, meanwhile, the modified silicon dioxide can form a particle layer on the surface of natural latex, and the antibacterial and anti-dust effects are achieved. Modified silicon dioxide is used as a nucleating agent, and an interpenetrating network structure is formed through supercritical foaming, vulcanization, deblocking and crosslinking of the modified silicon dioxide and the nucleating agent, so that the mechanical property of the latex pillow is improved; according to the invention, after foaming, aromatic particles are doped, the sleep-aiding essential oil composition is fixedly loaded by using graphene aerogel microspheres, and cyclodextrin is used for encapsulation, so that the aromatic particles can release essential oil only when in use.

Description

Technical Field

[0001] The invention relates to the technical field of latex, in particular to an antibacterial sleep-aiding latex pillow and a preparation method thereof. Background Art

[0002] Regarding the production process of latex foaming materials or latex pillow cores, the current main process is to chemically foam natural latex. The odor contained in the chemical foaming agent affects the appearance of the latex pillow, and the natural latex after chemical foaming is easy to deform and the support is not high enough. With the continuous improvement of living standards, people are paying more and more attention to hygienic, safe and healthy products, and functional latex products are becoming more and more popular among consumers. Due to the accelerated pace of life and the high pressure of life, the number of people with poor sleep quality or even insomnia is gradually increasing, so sleep-aid pillows came into being.

[0003] In addition, pillows will show signs of yellowing after being used for a long time. The main reasons for this phenomenon are: dust easily accumulates on the surface of the pillow, and the humidity, temperature and sealing degree of the pillow are conducive to the growth and reproduction of bacteria and fungi. Ordinary latex pillows do not have antibacterial and anti-dust effects. During use, they are very easy to turn yellow. Long-term cleaning of latex pillows will cause damage to the internal structure, shortening its lifespan and use effect. Summary of the invention

[0004] The purpose of the present invention is to provide an antibacterial sleep-aiding latex pillow and a preparation method thereof, so as to solve the problems existing in the prior art.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an antibacterial sleep-aiding latex pillow, comprising natural latex, modified silica, aromatic particles, a vulcanizer, and a gelling agent.

[0006] Furthermore, the modified silica is composed of 4-trimethoxysilylbutyraldehyde, silica, sodium metaphenylenediamine-4-sulfonate, solid phosgene, and a protein mixture; the protein mixture is natural silk fibroin and collagen.

[0007] Furthermore, the aromatic particles are prepared by spraying an essential oil composition on graphene aerogel microgel and then encapsulating it with cyclodextrin; the essential oil composition is prepared by mixing tangerine peel essential oil, rose essential oil, lavender essential oil, and jujube seed oil.

[0008] Furthermore, a method for preparing an antibacterial sleep-aiding latex pillow comprises the following preparation steps:

[0009] (1) Pretreated silica, sodium metaphenylenediamine-4-sulfonate, and anhydrous ethanol were mixed in a mass ratio of 0.15:0.2-0.4:15.8, stirred at 100-200 rpm for 20 min, and then 5 drops of glacial acetic acid were added. The mixture was reacted at 65-72° C. for 1.5-2.0 h, cooled to room temperature, filtered, and the filter cake was washed with ethanol three times, and dried at 70° C. for 24 h to obtain Schiff base silica;

[0010] (2) solid phosgene particles and toluene are mixed in a mass ratio of 1:8, stirred and dissolved, and then heated to 70°C, and a Schiff base silica mixed solution of 9.6 to 12.2 times the mass of the solid phosgene particles is added, wherein the mass ratio of Schiff base silica to toluene in the Schiff base silica mixed solution is 1:4, and ultrasonic dispersion is performed at 400 to 600 W for 10 minutes, and then the temperature is raised to 100 to 110°C, and the reaction is kept at this temperature for 1 to 3 hours, and then the mixture is filtered and dried at 80°C for 24 hours to obtain a modified precursor;

[0011] (3) At 45°C, the modified precursor, triethylamine and acetone were mixed in a mass ratio of 5-8:1.5:11-20, stirred at 500-700 rpm for 30 min, placed in an ice water bath, cooled for 10 min, and a protein aqueous solution 27-44 times the mass of the modified precursor was added, stirred at 5000-12000 rpm for 2 h, heated to 15°C, hydrated for 20-30 min, and then distilled at a vacuum degree of -0.06 MPa and 40°C for 1-3 h, and then filtered to obtain modified silica;

[0012] (4) Allyl-β-cyclodextrin, acrylic acid, 2,2'-azobisisobutyronitrile, and N,N-dimethylformamide were mixed in a mass ratio of 1:0.5:0.01:8, sealed and reacted for 24 hours under nitrogen protection to obtain a polymer solution, opened the seal, and added with aromatic microspheres 0.1 to 0.2 times the mass of the polymer solution, stirred at 400 to 600 rpm for 10 minutes, sealed and placed for 3 days, placed in a Soxhlet extractor and extracted with distilled water for 48 hours, placed in a refrigerator, pre-frozen for 24 hours, and then frozen at -50°C for 3 to 4 hours, and ground through a 100-mesh sieve to obtain aromatic particles;

[0013] (5) Natural latex and modified silica are mixed in a mass ratio of 50:2-5, and hydrochloric acid is added to the system at a pH of 2.7 while stirring at 200-400 rpm. Then, stirring is stopped. After reacting at 60° C. for 3-5 hours, sulfur, potassium oleate, ricinoleic acid, coconut acid, and aromatic particles are added in a mass ratio of 4-9:1-3:0.5-2:0.5-1:2-8, and the mass ratio of sulfur to natural latex is 2-4:50. After stirring at 10000 rpm for 10-20 minutes, the mixture is injected into a mold, vacuumed and filled with carbon dioxide to a pressure of 10-14 MPa, and foamed at 70-80° C. for 1-3 hours. The mixture is then placed in a steamer at 90-110° C. for vulcanization for 30 minutes, and cooled to obtain an antibacterial sleep-aiding latex pillow.

[0014] Furthermore, the preparation method of the pretreated silica in step (1) is as follows: silica and anhydrous ethanol are mixed in a mass ratio of 1:23.7, ultrasonically dispersed at 400-600W for 10 minutes, 10-18 times the mass of silica is added into a silane aqueous solution, the mass ratio of 4-trimethoxysilylbutyraldehyde to deionized water in the silane aqueous solution is 1:2, after stirring evenly, reacting at 60-70°C for 2-3h, washing with anhydrous ethanol, filtering until the filtrate is clear and transparent, taking the filter cake, and drying at 70°C for 24h.

[0015] Furthermore, the particle size of the silicon dioxide is 60 to 100 μm.

[0016] Furthermore, the mass ratio of natural silk fibroin, collagen and ice water in the protein aqueous solution of step (3) is 3:1:55.

[0017] Furthermore, the preparation method of the aromatic microspheres in step (4) is as follows: spraying the graphene aerogel microspheres with a plant essential oil composition of 0.05 to 0.2 times the mass of the graphene aerogel microspheres, spraying three times, placing the graphene aerogel microspheres in a refrigerator after each spraying, freezing for 30 to 60 minutes, rolling the graphene aerogel microspheres once, and then continuing to spray. After spraying, the graphene aerogel microspheres are placed in a refrigerator and frozen for 24 hours.

[0018] Furthermore, the mass ratio of tangerine peel essential oil, rose essential oil, lavender essential oil and wild jujube seed oil in the plant essential oil composition is 0.3-1:1:1:0.1-0.4.

[0019] Furthermore, the particle size of the graphene aerogel microspheres is 50 to 100 μm.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] The invention adopts natural latex, modified silicon dioxide and aromatic particles as main raw materials, uses modified silicon dioxide as a nucleating agent, and obtains a latex pillow through supercritical foaming to achieve the effects of antibacterial, dust-proof, sleep-aiding and anti-allergic.

[0022] First, the present invention adopts the silicon oxygen bond of 4-trimethoxysilyl butyraldehyde to be grafted on the surface of silica, and then, the aldehyde group is used to react with the amino group of sodium m-phenylenediamine-4-sulfonate to form a Schiff base antibacterial group, which effectively inhibits the growth of bacteria; then, the remaining unreacted amino group reacts with solid phosgene to introduce isocyanate groups, so that it can react with the amino group, hydroxyl group and other active groups of silk fibroin and collagen, and then the protein is grafted on the surface of silica. Since silk fibroin and collagen have excellent biocompatibility, they can promote the compatibility of modified silica with natural rubber, reduce the defects between chains, and strengthen the performance of latex molecular chains. In addition, silk fibroin and collagen contain a large number of hydrophilic groups, which can adsorb the hydrophilic groups in the environment. Trace amounts of moisture form a molecular conductive layer, which improves antistatic properties and prevents the adsorption of charged dust. The side chain is connected to a sulfonic acid group-metal ion bond, which can decomplex to generate positive and negative ions for ionic conductivity, thereby improving the ability to prevent dust from being contaminated. At the same time, silk fibroin has certain antibacterial properties and can work together with Schiff base to improve the antibacterial ability of latex pillows. Then, the modified silica relies on the protein mixture in the molecular chain to coagulate with natural latex, and wraps the modified silica particle layer on the surface of the natural latex particles. During the vulcanization and foaming process, the two are unsealed and then cross-linked to form an interpenetrating network structure, which improves the mechanical properties of the latex pillow. At the same time, the introduction of silk fibroin and collagen greatly reduces the allergic nature of natural latex.

[0023] Secondly, tangerine peel essential oil can achieve a calming effect, rose essential oil has the effects of regulating qi and relieving depression, and can effectively relieve insomnia, lavender has a calming and tranquilizing effect, and Chinese jujube seed oil has a calming and hypnotic effect. These essential oils are mixed, sprayed on graphene aerogel microspheres, and penetrate into the microspheres along the pores. The essential oil components all contain unsaturated double bonds, which can form π-π conjugation with the unsaturated double bonds on graphene, thereby fixing the essential oil in the graphene and achieving a sustained release effect. Cyclodextrin is then used to encapsulate the microspheres to prevent the aromatic particles from being released in the natural environment. When in use, the cyclodextrin is subjected to external pressure, which reduces the inclusion effect, allowing the essential oil to be released, which promotes the user's sleep. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In order to more clearly illustrate the method provided by the present invention, the following examples are used to describe in detail the test methods of the various indicators of the antibacterial sleep-aiding latex pillow prepared in the following examples are as follows:

[0026] Antibacterial: The antibacterial rate of the embodiment and the comparative example of the same size was tested according to GB / T20944.3.

[0027] Sleep aid: The Pittsburgh Sleep Quality Index (PSQI) test was used, and 70 test subjects were selected and divided into 7 groups, with 10 people in each group, random male and female, aged 20 to 60 years old. After 3 months of use, the test average was taken.

[0028] Anti-dust: Put the same mass of the embodiment and the comparative example into a connected air duct system, and regularly add standard dust simulating the real dust in the atmosphere into the air duct system. Add 20g of standard dust into the air duct system every 2 hours. The fan runs for 10 minutes and then stops for 10 minutes, which is regarded as one cycle. The dust blowing speed is 1-2m / s. Continue for 2 days and measure the anti-dust effect. The larger the anti-dust effect value, the better.

[0029] Anti-dust effect = (weight of latex pillow after dust treatment - weight of latex pillow before dust treatment) / weight of latex pillow before dust treatment × 100%.

[0030] Mechanical properties: The same size of the embodiment and the comparative example were tested according to method A in GB / T6669, with a test temperature of 70°C, a test time of 22h, and a compression of 75%. The rebound rate was tested according to GB / T6670.

[0031] Example 1

[0032] (1) SiO2 with a particle size of 60 μm and anhydrous ethanol were mixed in a mass ratio of 1:23.7, ultrasonically dispersed at 400 W for 10 min, and a silane aqueous solution with a mass ratio of 10 times that of the silica was added, wherein the mass ratio of 4-trimethoxysilylbutyraldehyde to deionized water in the silane aqueous solution was 1:2. After stirring evenly, the mixture was reacted at 60° C. for 2 h, washed with anhydrous ethanol, filtered until the filtrate was clear and transparent, and the filter cake was taken and dried at 70° C. for 24 h to obtain pretreated silica;

[0033] (2) pretreated silica, sodium m-phenylenediamine-4-sulfonate, and anhydrous ethanol were mixed in a mass ratio of 0.15:0.2:15.8, stirred at 100 rpm for 20 min, and then 5 drops of glacial acetic acid were added. The mixture was reacted at 65° C. for 1.5 h, cooled to room temperature, filtered, and the filter cake was washed with ethanol three times, and dried at 70° C. for 24 h to obtain Schiff base silica;

[0034] (3) solid phosgene particles and toluene were mixed in a mass ratio of 1:8, stirred and dissolved, and then heated to 70°C, and a Schiff base silica mixed solution of 9.6 times the mass of the solid phosgene particles was added, wherein the mass ratio of Schiff base silica to toluene in the Schiff base silica mixed solution was 1:4, and after ultrasonic dispersion at 400W for 10 minutes, the temperature was raised to 100°C, and the reaction was kept at this temperature for 1 hour, and then filtered and dried at 80°C for 24 hours to obtain a modified precursor;

[0035] (4) At 45°C, the modified precursor, triethylamine, and acetone were mixed in a mass ratio of 5:1.5:11, stirred at 500 rpm for 30 min, placed in an ice water bath, cooled for 10 min, and a protein aqueous solution 27 times the mass of the modified precursor was added, wherein the mass ratio of natural silk fibroin, collagen, and ice water in the protein aqueous solution was 3:1:55. After stirring at 5000 rpm for 2 h, the mixture was heated to 15°C and hydrated for 20 min. After distillation at a vacuum degree of -0.06 MPa and 40°C for 1 h, the modified silica was obtained by suction filtration;

[0036] (5) Tangerine peel essential oil, rose essential oil, lavender essential oil, and jujube seed oil are mixed in a mass ratio of 0.3:1:1:0.1, and stirred to obtain a plant essential oil composition, and the plant essential oil composition of 0.05 times the mass of the graphene aerogel microspheres is sprayed on the graphene aerogel microspheres with a particle size of 50 μm, and the spraying is divided into 3 times. After each spraying, the graphene aerogel microspheres are placed in a refrigerator. After freezing for 30 minutes, the graphene aerogel microspheres are rolled once, and then spraying is continued. After spraying is completed, they are placed in a refrigerator and frozen for 24 hours to obtain aromatic microspheres;

[0037] (6) Allyl-β-cyclodextrin, acrylic acid, 2,2'-azobisisobutyronitrile, and N,N-dimethylformamide were mixed in a mass ratio of 1:0.5:0.01:8, sealed and reacted for 24 hours under nitrogen protection to obtain a polymer solution, opened the seal, and added with 0.1 times the mass of the polymer solution of aromatic microspheres, stirred at 400 rpm for 10 minutes, sealed and placed for 3 days, placed in a Soxhlet extractor and extracted with distilled water for 48 hours, placed in a refrigerator, pre-frozen for 24 hours, and then frozen at -50°C for 3 hours, and ground through a 100-mesh sieve to obtain aromatic particles;

[0038] (7) Natural latex and modified silica were mixed in a mass ratio of 50:2. Under stirring at 200 rpm, hydrochloric acid was added until the pH of the system reached 2.7. Then, stirring was stopped. After reacting at 60°C for 3 h, sulfur, potassium oleate, ricinoleic acid, coconut acid, and aromatic particles were added in a mass ratio of 4:1:0.5:0.5:2. The mass ratio of sulfur to natural latex was 2:50. After stirring at 10,000 rpm for 10 min, the mixture was injected into a mold, vacuumed and filled with carbon dioxide to a pressure of 10 MPa. After foaming at 70°C for 1 h, the mixture was placed in a steamer at 90°C for vulcanization for 30 min, and cooled to obtain an antibacterial sleep-aiding latex pillow.

[0039] Example 2

[0040] (1) Silica with a particle size of 80 μm and anhydrous ethanol were mixed in a mass ratio of 1:23.7, and ultrasonically dispersed at 50 W for 10 min, and a silane aqueous solution with a mass ratio of 14 times that of the silica was added, and the mass ratio of 4-trimethoxysilylbutyraldehyde to deionized water in the silane aqueous solution was 1:2. After stirring evenly, the mixture was reacted at 65° C. for 2.5 h, washed with anhydrous ethanol, and filtered until the filtrate was clear and transparent, and the filter cake was taken and dried at 70° C. for 24 h to obtain pretreated silica;

[0041] (2) pretreated silica, sodium m-phenylenediamine-4-sulfonate, and anhydrous ethanol were mixed in a mass ratio of 0.15:0.3:15.8, stirred at 150 rpm for 20 min, and then 5 drops of glacial acetic acid were added. The mixture was reacted at 65-72° C. for 1.8 h, cooled to room temperature, filtered, and the filter cake was washed with ethanol three times, and dried at 70° C. for 24 h to obtain Schiff base silica;

[0042] (3) solid phosgene particles and toluene were mixed in a mass ratio of 1:8, stirred and dissolved, and then heated to 70°C, and a Schiff base silica mixed solution of 10.9 times the mass of the solid phosgene particles was added, and the mass ratio of Schiff base silica to toluene in the Schiff base silica mixed solution was 1:4. After 500W ultrasonic dispersion for 10 minutes, the temperature was raised to 105°C, and the reaction was kept at this temperature for 2 hours, and then filtered and dried at 80°C for 24 hours to obtain a modified precursor;

[0043] (4) At 45°C, the modified precursor, triethylamine, and acetone were mixed in a mass ratio of 6.5:1.5:15.5, stirred at 600 rpm for 30 min, placed in an ice water bath, cooled for 10 min, and a protein aqueous solution 35.5 times the mass of the modified precursor was added, wherein the mass ratio of natural silk fibroin, collagen, and ice water in the protein aqueous solution was 3:1:55. After stirring at 8500 rpm for 2 h, the mixture was heated to 15°C and hydrated for 25 min. After distillation at a vacuum degree of -0.06 MPa and 40°C for 2 h, the modified silica was obtained by suction filtration;

[0044] (5) Tangerine peel essential oil, rose essential oil, lavender essential oil, and jujube seed oil are mixed in a mass ratio of 0.65:1:1:0.25, and stirred to obtain a plant essential oil composition, and the plant essential oil composition of 0.13 times the mass of the graphene aerogel microspheres is sprayed on the graphene aerogel microspheres with a particle size of 75 μm, and the spraying is divided into 3 times. After each spraying, the graphene aerogel microspheres are placed in a refrigerator and frozen for 45 minutes. The graphene aerogel microspheres are rolled once and then sprayed again. After the spraying is completed, they are placed in a refrigerator and frozen for 24 hours to obtain aromatic microspheres;

[0045] (6) Allyl-β-cyclodextrin, acrylic acid, 2,2'-azobisisobutyronitrile, and N,N-dimethylformamide were mixed in a mass ratio of 1:0.5:0.01:8, sealed and reacted for 24 hours under nitrogen protection to obtain a polymer solution, opened the seal, and added with 0.15 times the mass of the polymer solution of aromatic microspheres, stirred at 500 rpm for 10 minutes, sealed and placed for 3 days, placed in a Soxhlet extractor and extracted with distilled water for 48 hours, placed in a refrigerator, pre-frozen for 24 hours, and then frozen at -50°C for 3.5 hours, and ground through a 100-mesh sieve to obtain aromatic particles;

[0046] (7) Natural latex and modified silica were mixed in a mass ratio of 50:3.5. Under stirring at 300 rpm, hydrochloric acid was added until the pH of the system was 2.7, and then stirring was stopped. After reacting at 60°C for 4 hours, sulfur, potassium oleate, ricinoleic acid, coconut acid, and aromatic particles were added in a mass ratio of 6.5:2:1.3:0.7:5, and the mass ratio of sulfur to natural latex was 3:50. After stirring at 10,000 rpm for 15 minutes, the mixture was injected into a mold, vacuumed and filled with carbon dioxide to a pressure of 12 MPa, and foamed at 75°C for 2 hours. The mixture was then placed in a steamer at 100°C for vulcanization for 30 minutes, and cooled to obtain an antibacterial sleep-aiding latex pillow.

[0047] Example 3

[0048] (1) Silica with a particle size of 100 μm and anhydrous ethanol were mixed in a mass ratio of 1:23.7, ultrasonically dispersed at 600 W for 10 min, and a silane aqueous solution with a mass ratio of 18 times that of the silica was added, wherein the mass ratio of 4-trimethoxysilylbutyraldehyde to deionized water in the silane aqueous solution was 1:2. After stirring evenly, the mixture was reacted at 70° C. for 3 h, washed with anhydrous ethanol, and filtered until the filtrate was clear and transparent. The filter cake was taken and dried at 70° C. for 24 h to obtain pretreated silica;

[0049] (2) pretreated silica, sodium m-phenylenediamine-4-sulfonate, and anhydrous ethanol were mixed in a mass ratio of 0.15:0.4:15.8, stirred at 200 rpm for 20 min, and then 5 drops of glacial acetic acid were added. After reacting at 72° C. for 2 h, the mixture was cooled to room temperature, filtered, and the filter cake was washed with ethanol three times, and dried at 70° C. for 24 h to obtain Schiff base silica;

[0050] (3) solid phosgene particles and toluene were mixed in a mass ratio of 1:8, stirred and dissolved, and then heated to 70°C, and a Schiff base silica mixed solution of 12.2 times the mass of the solid phosgene particles was added, and the mass ratio of Schiff base silica to toluene in the Schiff base silica mixed solution was 1:4. After ultrasonic dispersion at 600W for 10 minutes, the temperature was raised to 110°C, and the reaction was kept at this temperature for 3 hours, and then filtered and dried at 80°C for 24 hours to obtain a modified precursor;

[0051] (4) At 45°C, the modified precursor, triethylamine, and acetone were mixed in a mass ratio of 8:1.5:20, stirred at 700 rpm for 30 min, placed in an ice water bath, cooled for 10 min, and a protein aqueous solution 44 times the mass of the modified precursor was added, wherein the mass ratio of natural silk fibroin, collagen, and ice water in the protein aqueous solution was 3:1:55. After stirring at 12000 rpm for 2 h, the mixture was heated to 15°C and hydrated for 30 min. After distillation at a vacuum degree of -0.06 MPa and 40°C for 3 h, the modified silica was obtained by suction filtration;

[0052] (5) Tangerine peel essential oil, rose essential oil, lavender essential oil, and jujube seed oil are mixed in a mass ratio of 1:1:1:0.4, and stirred to obtain a plant essential oil composition, and the plant essential oil composition of 0.2 times the mass of the graphene aerogel microspheres is sprayed on the graphene aerogel microspheres with a particle size of 100 μm, and the spraying is divided into 3 times, and each spraying is completed, and the graphene aerogel microspheres are placed in a refrigerator. After freezing for 60 minutes, the graphene aerogel microspheres are rolled once, and then spraying is continued. After spraying is completed, they are placed in a refrigerator and frozen for 24 hours to obtain aromatic microspheres;

[0053] (6) Allyl-β-cyclodextrin, acrylic acid, 2,2'-azobisisobutyronitrile, and N,N-dimethylformamide were mixed in a mass ratio of 1:0.5:0.01:8, sealed and reacted for 24 hours under nitrogen protection to obtain a polymer solution, opened the seal, and added with aromatic microspheres 0.2 times the mass of the polymer solution, stirred at 600 rpm for 10 minutes, sealed and placed for 3 days, placed in a Soxhlet extractor and extracted with distilled water for 48 hours, placed in a refrigerator, pre-frozen for 24 hours, and then frozen at -50°C for 4 hours, and ground through a 100-mesh sieve to obtain aromatic particles;

[0054] (7) Natural latex and modified silica were mixed in a mass ratio of 50:5. Under stirring at 400 rpm, hydrochloric acid was added until the pH of the system reached 2.7. Then, stirring was stopped. After reacting at 60°C for 5 hours, sulfur, potassium oleate, ricinoleic acid, coconut acid, and aromatic particles were added in a mass ratio of 9:3:2:1:8. The mass ratio of sulfur to natural latex was 4:50. After stirring at 10,000 rpm for 20 minutes, the mixture was injected into a mold, vacuumed and filled with carbon dioxide to a pressure of 14 MPa. After foaming at 80°C for 3 hours, the mixture was placed in a steamer at 110°C for vulcanization for 30 minutes, and cooled to obtain an antibacterial sleep-aiding latex pillow.

[0055] Comparative Example 1

[0056] The difference between Comparative Example 1 and Example 2 is that there is no step (1) to (4), and step (7) is changed to: natural latex and silicon dioxide are mixed in a mass ratio of 50:3.5, and hydrochloric acid is added to the system pH at 2.7 under stirring at 300rpm, and then stirring is stopped. After reacting at 60°C for 4h, sulfur, potassium oleate, ricinoleic acid, coconut oleic acid, and aromatic particles are added in a mass ratio of 6.5:2:1.3:0.7:5, and the mass ratio of sulfur to natural latex is 3:50. After stirring at 10000rpm for 15min, the mold is injected, and carbon dioxide is filled in a vacuum until the pressure is 12MPa, and after foaming at 75°C for 2h, it is placed in a steamer at 100°C for vulcanization for 30min, and cooled to obtain an antibacterial sleep-aiding latex pillow. The remaining steps are the same as those in Example 2.

[0057] Comparative Example 2

[0058] The difference between Comparative Example 2 and Example 2 is that there is no step (2), and step (3) is changed to: solid phosgene particles and toluene are mixed in a mass ratio of 1:8, stirred and dissolved, heated to 70°C, and a pretreated silica mixed liquid with a mass of 10.9 times that of the solid phosgene particles is added, the mass ratio of pretreated silica to toluene in the pretreated silica mixed liquid is 1:4, 500W ultrasonic dispersion for 10 minutes, heated to 105°C, kept warm for reaction for 2 hours, filtered, and dried at 80°C for 24 hours to obtain a modified precursor. The remaining steps are the same as those in Example 2.

[0059] Comparative Example 3

[0060] The difference between Comparative Example 3 and Example 2 is that there is no step (3), and step (4) is changed to: at 45°C, Schiff base silica, triethylamine, and acetone are mixed in a mass ratio of 6.5:1.5:15.5, stirred at 600 rpm for 30 min, placed in an ice water bath, cooled for 10 min, and a protein aqueous solution 35.5 times the mass of Schiff base silica is added, the mass ratio of natural silk fibroin, collagen, and ice water in the protein aqueous solution is 3:1:55, stirred at 8500 rpm for 2 h, heated to 15°C, hydrated for 25 min, and then distilled at a vacuum degree of -0.06 MPa and 40°C for 2 h, and then filtered to obtain modified silica. The remaining steps are the same as in Example 2.

[0061] Comparative Example 4

[0062] The difference between Comparative Example 4 and Example 2 is that there is no step (6), and step (7) is changed to: natural latex and modified silica are mixed in a mass ratio of 50:3.5, and hydrochloric acid is added to the system pH at 2.7 under stirring at 300rpm, and stirring is stopped. After reacting at 60°C for 4h, sulfur, potassium oleate, ricinoleic acid, coconut oleic acid, and aromatic microspheres are added in a mass ratio of 6.5:2:1.3:0.7:5, and the mass ratio of sulfur to natural latex is 3:50. After stirring at 10000rpm for 15min, the mold is injected, and carbon dioxide is filled in a vacuum until the pressure is 12MPa, and foaming at 75°C for 2h, and then placed in a steamer at 100°C for vulcanization for 30min, and cooled to obtain an antibacterial sleep-aiding latex pillow. The remaining steps are the same as in Example 2.

[0063] Comparative Example 5

[0064] The difference between Comparative Example 5 and Example 2 is that there is no step (5), and step (6) is changed to: dissolving β-cyclodextrin in distilled water with a mass of 50 times that of β-cyclodextrin, adding a plant essential oil composition at a wall-core ratio of 3:1, wherein the mass ratio of tangerine peel essential oil, rose essential oil, lavender essential oil, and jujube seed oil in the plant essential oil composition is 0.3:1:1:0.1, mixing, stirring at 40°C and 400rpm for 3h, standing and settling for 12h, filtering with suction, and drying at 60°C for 5h to obtain aromatic particles.

[0065] Effect example

[0066] Table 1 below shows the performance analysis results of the antibacterial sleep-aiding latex pillows of Examples 1 to 3 of the present invention and Comparative Examples 1 to 5.

[0067] Table 1

[0068]

[0069]

[0070] From the comparison of the rebound test data of the embodiment and the comparative example, it can be found that the modified silica used in the present invention can wrap the natural latex particles. During the vulcanization and foaming process, the two are unsealed and then cross-linked to form an interpenetrating network structure, thereby improving the mechanical properties of the latex pillow; from the comparison of the antibacterial rate experimental data of the embodiment and the comparative example, it can be found that the present invention uses 4-trimethoxysilylbutyraldehyde, sodium m-phenylenediamine-4-sulfonate and protein mixture as raw materials to modify silica, so that Schiff base and silk protein are introduced into its surface, which work together to improve the antibacterial ability of the latex pillow; from the comparison of the sleep aid and usage time experimental data of the embodiment and the comparative example, it can be found that the tangerine peel essential oil, rose essential oil, lavender essential oil, acid essential oil used in the present invention Jujube seed oil has an excellent sleep-inducing effect. At the same time, graphene aerogel microspheres can play a fixing role and enhance the sustained-release effect. At the same time, cyclodextrin encapsulation can prevent the essential oil from volatilizing at high temperature during the vulcanization process, thereby improving the sleep-inducing and sustained-release effects. From the comparison of the anti-dust and resistivity experimental data of the embodiment and the comparative example, it can be found that the present invention introduces a sulfonic acid group-metal ion bond on the surface of silica, which can decomplex and generate positive and negative ions for ion conduction, thereby improving the anti-dust ability. At the same time, silk protein and collagen contain a large number of hydrophilic groups, which can improve the hydrophilicity of natural latex, effectively adsorb trace moisture in the environment, form a molecular conductive layer, improve antistatic properties, and prevent the adsorption of charged dust.

[0071] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the equivalent elements of the claims be included in the invention. Any marking in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An antibacterial sleep-aiding latex pillow, characterized in that: The natural latex, modified silicon dioxide, aromatic particles, vulcanizing agent and gelling agent.

2. The antibacterial sleep-aiding latex pillow according to claim 1, characterized in that: The modified silicon dioxide is composed of 4-trimethoxysilylbutyraldehyde, silicon dioxide, sodium metaphenylenediamine-4-sulfonate, solid phosgene and a protein mixture; the protein mixture is natural silk fibroin and collagen.

3. The antibacterial sleep-aiding latex pillow according to claim 1, characterized in that: The aromatic particles are prepared by spraying an essential oil composition on graphene aerogel microgels and then encapsulating them with cyclodextrin; the essential oil composition is prepared by mixing tangerine peel essential oil, rose essential oil, lavender essential oil and jujube seed oil.

4. A method for preparing an antibacterial sleep-aiding latex pillow, characterized in that: The method comprises the following preparation steps: (1) Pretreated silica, sodium metaphenylenediamine-4-sulfonate, and anhydrous ethanol were mixed in a mass ratio of 0.15:0.2-0.4:15.8, stirred at 100-200 rpm for 20 min, and then 5 drops of glacial acetic acid were added. The mixture was reacted at 65-72° C. for 1.5-2.0 h, cooled to room temperature, filtered, and the filter cake was washed with ethanol three times, and dried at 70° C. for 24 h to obtain Schiff base silica; (2) solid phosgene particles and toluene are mixed in a mass ratio of 1:8, stirred and dissolved, and then heated to 70°C, and a Schiff base silica mixed solution of 9.6 to 12.2 times the mass of the solid phosgene particles is added, wherein the mass ratio of Schiff base silica to toluene in the Schiff base silica mixed solution is 1:4, and ultrasonic dispersion is performed at 400 to 600 W for 10 minutes, and then the temperature is raised to 100 to 110°C, and the reaction is kept at this temperature for 1 to 3 hours, and then the mixture is filtered and dried at 80°C for 24 hours to obtain a modified precursor; (3) At 45°C, the modified precursor, triethylamine and acetone were mixed in a mass ratio of 5-8:1.5:11-20, stirred at 500-700 rpm for 30 min, placed in an ice water bath, cooled for 10 min, and a protein aqueous solution 27-44 times the mass of the modified precursor was added, stirred at 5000-12000 rpm for 2 h, heated to 15°C, hydrated for 20-30 min, and then distilled at a vacuum degree of -0.06 MPa and 40°C for 1-3 h, and then filtered to obtain modified silica; (4) Allyl-β-cyclodextrin, acrylic acid, 2,2'-azobisisobutyronitrile, and N,N-dimethylformamide were mixed in a mass ratio of 1:0.5:0.01:8, sealed and reacted for 24 hours under nitrogen protection to obtain a polymer solution, opened the seal, and added with aromatic microspheres 0.1 to 0.2 times the mass of the polymer solution, stirred at 400 to 600 rpm for 10 minutes, sealed and placed for 3 days, placed in a Soxhlet extractor and extracted with distilled water for 48 hours, placed in a refrigerator, pre-frozen for 24 hours, and then frozen at -50°C for 3 to 4 hours, and ground through a 100-mesh sieve to obtain aromatic particles; (5) Natural latex and modified silica were mixed in a mass ratio of 50:2-5, and hydrochloric acid was added to the system until the pH value was 2.7 under stirring at 200-400 rpm, and then stirring was stopped. After reacting at 60°C for 3-5 hours, the mass ratio was adjusted to 0.1:

1. 4-9:1-3:0.5-2:0.5-1:2-8 Add sulfur, potassium oleate, ricinoleic acid, coconut oleic acid and aromatic particles, the mass ratio of sulfur to natural latex is 2-4:50, stir at 10000rpm for 10-20min, inject into a mold, evacuate and fill with carbon dioxide to a pressure of 10-14MPa, foam at 70-80℃ for 1-3h, place in a steamer at 90-110℃ for vulcanization for 30min, and cool to obtain an antibacterial sleep-aiding latex pillow.

5. The method for preparing an antibacterial sleep-aiding latex pillow according to claim 4, characterized in that: The preparation method of the pretreated silica in step (1) is as follows: silica and anhydrous ethanol are mixed in a mass ratio of 1:23.7, ultrasonically dispersed at 400-600W for 10 minutes, and a silane aqueous solution with a mass ratio of 10 to 18 times that of the silica is added, wherein the mass ratio of 4-trimethoxysilylbutyraldehyde to deionized water in the silane aqueous solution is 1:2, stirred evenly, reacted at 60-70°C for 2-3 hours, washed with anhydrous ethanol, filtered until the filtrate is clear and transparent, and the filter cake is taken and dried at 70°C for 24 hours.

6. The method for preparing an antibacterial sleep-aiding latex pillow according to claim 5, characterized in that: The particle size of the silicon dioxide is 60 to 100 μm.

7. The method for preparing an antibacterial sleep-aiding latex pillow according to claim 4, characterized in that: The mass ratio of natural silk fibroin, collagen and ice water in the protein aqueous solution of step (3) is 3:1:

55.

8. The method for preparing an antibacterial sleep-aiding latex pillow according to claim 4, characterized in that: The preparation method of the aromatic microspheres in step (4) is as follows: spraying the graphene aerogel microspheres with a plant essential oil composition of 0.05 to 0.2 times the mass of the graphene aerogel microspheres, the spraying is divided into 3 times, after each spraying, the graphene aerogel microspheres are placed in a refrigerator, frozen for 30 to 60 minutes, the graphene aerogel microspheres are rolled once, and then the spraying is continued. After the spraying is completed, the graphene aerogel microspheres are placed in a refrigerator and frozen for 24 hours.

9. The method for preparing an antibacterial sleep-aiding latex pillow according to claim 8, characterized in that: The mass ratio of tangerine peel essential oil, rose essential oil, lavender essential oil and wild jujube seed oil in the plant essential oil composition is 0.3-1:1:1:0.1-0.

4.

10. The method for preparing an antibacterial sleep-aiding latex pillow according to claim 8, characterized in that: The graphene aerogel microspheres have a particle size of 50 to 100 μm.

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