A sisal fiber-based deodorant material and its preparation method

Abstract

The present invention relates to a sisal fiber-based deodorant material and a preparation method thereof. The sisal fiber-based deodorant material includes first modified sisal fibers, second modified sisal fibers, an overall mechanical property enhancer, an anti-adhesion modifier, and an acrylic resin adhesive. The moisture-absorbing and deodorizing main material is composed of the first modified sisal fibers and the second modified sisal fibers. With their mutual cooperation, the moisture-absorbing and deodorizing effect is better. The addition of the overall mechanical property enhancer plays an effective role in improving the overall mechanical property of the product. The addition of the anti-adhesion modifier plays a role in forming a film on the surface of the product to prevent adhesion. Under the interaction of multiple components, the problems of cracking and deformation of the deodorant material under high humidity and temperature change, and the easy icing on the surface of the deodorant material and its easy adhesion to the items in the refrigerator or the inner wall of the refrigerator are effectively solved. At the same time, the problems of melting and shedding of the moisture-absorbing and deodorizing main material and color change of the product are effectively solved, overcoming the problem that the existing sisal fiber deodorant products cannot be used well in the refrigerator.

Description

Technical Field

[0001] The present invention relates to the technical field of preparation methods of sisal fiber products, and particularly relates to a sisal fiber-based deodorant material and a preparation method thereof. Background Art

[0002] In terms of deodorization principles, deodorants mainly include the following types: physical deodorants, chemical deodorants, microbial deodorants, plant deodorants, composite deodorants, etc. Physical deodorants deodorize through physical methods, utilizing the physical properties of deodorants or odor gases, without changing the composition of odor gases, only changing the local concentration of odor gases, or rather the relative concentration. Common ones include adsorption deodorants, masking deodorants, etc. Masking deodorization uses some pleasant aromatic agents to cover up odors, but when the aromatic agents volatilize, odor molecules still exist and cannot be completely eliminated; Adsorption deodorization uses some porous substances similar to activated carbon and diatomaceous earth to adsorb odor molecules. The disadvantage of this method is that adsorption is selective. Chemical deodorants use oxidation, reduction decomposition, neutralization reaction, addition reaction, condensation reaction, ion exchange reaction, etc. to turn the generated malodorous substances into odorless substances, thereby eliminating odors. Among them, oxidation deodorants are more widely used, but the working environment of this deodorization method is restricted by conditions and it is not feasible to be widely used. The basic principle of microbial deodorization is a process in which microorganisms absorb the malodorous substances dissolved in water into their own bodies and degrade them through the metabolic activities of the microorganisms. Its advantage is good environmental protection, but the defect is that it is difficult to play a role in the malodors that have already been emitted.

[0003] Sisal (scientific name: Agave sisalana Perr. ex Engelm.) is also known as pineapple hemp. It belongs to the genus Agave in the family Agavaceae and is a perennial tropical hard-leaf fiber crop. It is native to Mexico and is now mainly planted in Africa, Latin America, Asia and other places. It is the most widely used hard fiber in the world today. Sisal fiber itself has good luster, tough texture, corrosion resistance, relatively large elasticity and strong tensile strength. Coupled with good resistance to salt and alkali and friction performance, it is widely used in various industries such as transportation, fisheries, petroleum, and metallurgy and has important economic value. Sisal processed products mainly include sisal fiber, sisal yarn, sisal carpet, sisal polishing wheel, wire rope core, saponin, sisal wallpaper, deodorant products and other sisal products. Sisal fiber deodorant products mainly utilize the adsorption performance of sisal fiber itself. However, the adsorption property of sisal fiber itself is not sufficient to support it as a deodorant product with good adsorption effect. Therefore, various modifications need to be carried out on sisal fiber to enhance its adsorption performance. Currently, common methods for modifying sisal fiber are: adding bactericides such as nano silver ions or adsorbents such as diatomite to sisal fiber, so that the bactericide or adsorbent adheres to the surface of sisal fiber, thereby increasing the deodorization performance of sisal fiber. However, the problem with these methods is that the bactericide or adsorbent is easily shed, resulting in poor actual use effect; in addition, if such products are in extreme environments such as high humidity and low temperature in the refrigerator for a long time, it will cause the product materials to deteriorate rapidly, and the bactericide or adsorbent on the surface is easily melted and shed, and the product is easily yellowed and blackened. Such products cannot be used in the freezer either. Sudden temperature rise and fall are likely to cause deformation and cracking of such products. And when the surface of such products is untreated, it is easy to freeze and adhere to the items in the refrigerator or the inner wall of the refrigerator. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a sisal fiber-based deodorant material and its preparation method that can be used in extreme environments of high humidity and low temperature, is not easy to change color, will not deform and crack when the temperature rises and falls suddenly, is not easy to adhere to the items in the refrigerator or the inner wall of the refrigerator, has effective antibacterial and deodorant performance, and can be industrially produced.

[0005] The present invention is achieved through the following technical solutions:

[0006] A sisal fiber-based deodorant material, the sisal fiber-based deodorant material includes first modified sisal fiber for absorbing odor and sterilizing, second modified sisal fiber for absorbing moisture and deodorizing, an overall mechanical property enhancer for preventing the deodorant material from cracking and deforming under high humidity and temperature change, an anti-adhesion modifier for preventing the surface of the deodorant material from being easily frozen and easily adhering to the items in the refrigerator or the inner wall of the refrigerator, and an acrylic resin adhesive;

[0007] The weight percentage composition of each component of the sisal fiber-based deodorant material is as follows: 25% - 60% of the first modified sisal fiber, 25% - 60% of the second modified sisal fiber, 3% - 5% of the overall mechanical property enhancer, 0.5% - 1.0% of the anti-adhesion modifier, and 0.8% - 1.0% of the acrylic resin adhesive; among them, the total proportion of the first modified sisal fiber and the second modified sisal fiber is more than 93%.

[0008] The first modified sisal fiber is a modified sisal fiber loaded with a nano-silver ion bactericide; the second modified sisal fiber is a modified sisal fiber loaded with a diatomite adsorbent.

[0009] The overall mechanical property enhancer includes the following components in parts by weight: 50 - 60 parts of arabic gum, 20 - 25 parts of carboxymethyl cellulose, 10 - 15 parts of guar gum, and 7 - 10 parts of polyethylene glycol.

[0010] The anti-adhesion modifier includes the following components in parts by weight: 60 - 80 parts of pullulan polysaccharide and 30 - 40 parts of polycarbonate.

[0011] Furthermore, the weight percentage composition of each component of the sisal fiber-based deodorant material is as follows: 30% - 60% of the first modified sisal fiber, 30% - 60% of the second modified sisal fiber, 4% - 5% of the overall mechanical property enhancer, 0.8% - 1.0% of the anti-adhesion modifier, and 0.9% - 1.0% of the acrylic resin adhesive; among them, the total proportion of the first modified sisal fiber and the second modified sisal fiber is more than 93%.

[0012] Furthermore, the preparation method of the first modified sisal fiber is as follows: 1) Take sisal fiber and cook it in boiling water for 20 - 30 min; then add sodium hydroxide and calcium chloride, the addition amount of sodium hydroxide is 30 - 40 g / L, the addition amount of calcium chloride is 50 - 60 g / L, continue to stir and react for 3 - 5 h, filter to obtain heat-modified sisal fiber; 2) Put the heat-modified sisal fiber into a hydrochloric acid-sodium chloride aqueous solution with a hydrochloric acid concentration of 0.3 mol / L and a sodium chloride concentration of 0.5 mol / L and stir and react for 2.5 - 3.5 h, then add alkali to adjust the solution to neutral, filter to obtain room-temperature modified sisal fiber; 3) Add the room-temperature modified sisal fiber into a silver ammonia reduction solution for silver deposition, take it out and dry it to obtain the first modified sisal fiber.

[0013] Further, the preparation method of the second modified sisal fiber is as follows: 1) Take 15-20 parts by weight of diatomite, 50-60 parts by weight of sisal fiber, 5-10 parts by weight of hydroxypropyl methylcellulose, 2-3 parts by weight of sepiolite, and 0.2-0.3 parts by weight of acrylic resin adhesive; 2) Mix the diatomite and sepiolite together, and place them in an activation condition of 1000-1200 °C for 4-6 h, take out and cool to room temperature to obtain activated diatomite; 3) Mix the activated diatomite with the weighed sisal fiber, hydroxypropyl methylcellulose, and acrylic resin adhesive evenly, dry and crush to obtain the second modified sisal fiber.

[0014] Further, the overall mechanical property enhancer includes the following components in parts by weight: 55-60 parts of gum arabic, 22-25 parts of carboxymethyl cellulose, 12-15 parts of guar gum, and 8-10 parts of polyethylene glycol.

[0015] Further, the anti-adhesion modifier includes the following components in parts by weight: 70-80 parts of pullulan, and 35-40 parts of polycarbonate.

[0016] Further, the anti-adhesion modifier further includes 20-25 parts by weight of cinnamaldehyde.

[0017] The present invention also provides a preparation method of a sisal fiber-based deodorant material, including the following steps:

[0018] (1) Weigh each component constituting the sisal fiber-based deodorant material according to the weight part ratio;

[0019] (2) Put the first modified sisal fiber and the second modified sisal fiber into a container, add water and mix and stir to obtain a mixture, and the specific gravity of water in the mixture is 60-70 wt%;

[0020] (3) Add the overall mechanical property enhancer and the anti-adhesion modifier to the mixture and mix evenly; then add the acrylic resin adhesive and mix and stir for 6-8 min to obtain a blend;

[0021] (4) Put the blend into a mold, inject and mold, and demold to obtain a preliminary product;

[0022] (5) Freeze the preliminary product at -20 °C to -15 °C for 8-10 h to obtain a frozen preliminary product;

[0023] (6) Air-dry the frozen preliminary product to obtain the sisal fiber-based deodorant material.

[0024] Further, in step (2), the first modified sisal fiber and the second modified sisal fiber are put into a container, water is added, and they are mixed and stirred at 35-40°C to obtain a mixture, and the specific gravity of water in the mixture is 65-70 wt%.

[0025] Further, the preliminary product is frozen at -18°C to -15°C for 9-10 h to obtain a frozen preliminary product.

[0026] A sisal fiber-based deodorant material and a preparation method thereof according to the present invention. In view of the prior art that bactericides such as nano silver ions or adsorbents such as diatomaceous earth are added to sisal fibers to make the bactericides or adsorbents adhere to the surface of the sisal fibers, thereby increasing the deodorizing performance of the sisal fibers, there are the following problems: 1) The bactericides or adsorbents are very easy to fall off, resulting in poor actual use effects; 2) If the product is in extreme environments such as high humidity and low temperature in a refrigerator for a long time, the product material will deteriorate rapidly, and the bactericides or adsorbents on the surface are very easy to melt and fall off, and the product is very easy to turn yellow and black; 3) Such products cannot be used in the freezer either, and sudden temperature rise and fall are very easy to cause such products to deform and crack; 4) Ice is very easy to form on the surface of such products and adhere to the items in the refrigerator or the inner wall of the refrigerator, etc. The moisture absorption and deodorization main body material of this application is composed of the first modified sisal fiber and the second modified sisal fiber. With mutual cooperation, the moisture absorption and deodorization effect is better; an overall mechanical property enhancer is added to prevent the deodorant material from cracking and deforming under high humidity and temperature changes. The arabic gum, carboxymethyl cellulose, and guar gum in the overall mechanical property enhancer cooperate with each other to make it have strong adhesion and thickening properties, and at the same time make the moisture absorption and deodorization main body material disperse more evenly. Coupled with the dispersion and bonding effect of polyethylene glycol, it plays an effective role in improving the overall mechanical properties of the product; an anti-adhesion modifier is added to prevent the surface of the deodorant material from icing and adhering to the items in the refrigerator or the inner wall of the refrigerator. Pullulan polysaccharide and polycarbonate in the anti-adhesion modifier play a role in forming a film on the surface of the product to prevent adhesion; under the interaction of multiple components, the problems of cracking and deformation of the deodorant material under high humidity and temperature changes and the easy icing of the surface of the deodorant material and its easy adhesion to the items in the refrigerator or the inner wall of the refrigerator are effectively solved. At the same time, the problems of melting and falling off of the moisture absorption and deodorization main body material and product discoloration are effectively solved, and the problem that the existing sisal fiber deodorant products cannot be used well in the refrigerator is overcome.

[0027] A sisal fiber-based deodorant material and a preparation method thereof according to the present invention. The anti-adhesion modifier further includes cinnamaldehyde. Cinnamaldehyde is safe, environmentally friendly, fragrant, and has excellent antibacterial effects. In addition to helping to form a film and prevent adhesion, it can also keep the color of the sisal fiber-based deodorant material bright, and further improve the quality of the sisal fiber-based deodorant material. Specific embodiments

[0028] The following embodiments can help those skilled in the art to more comprehensively understand the present invention, but cannot limit the present invention in any way.

[0029] Example 1

[0030] A sisal fiber-based deodorant material, and the weight percentage composition of each component of the sisal fiber-based deodorant material is: 60% of the first modified sisal fiber, 33% of the second modified sisal fiber, 5% of the overall mechanical property enhancer, 1.0% of the anti-adhesion modifier, and 1.0% of the acrylic resin adhesive; wherein, the total proportion of the first modified sisal fiber and the second modified sisal fiber is more than 93%;

[0031] The preparation method of the first modified sisal fiber is as follows: 1) Take sisal fiber and cook it in boiling water for 20 min; then add sodium hydroxide and calcium chloride, the addition amount of sodium hydroxide is 30 g / L, and the addition amount of calcium chloride is 50 g / L, and continue to stir and react for 3 h, filter to obtain heat-modified sisal fiber; 2) Put the heat-modified sisal fiber into a hydrochloric acid-sodium chloride aqueous solution with a hydrochloric acid concentration of 0.3 mol / L and a sodium chloride concentration of 0.5 mol / L and stir and react for 2.5 h, then add sodium hydroxide solution to adjust the solution to neutral, filter to obtain room-temperature modified sisal fiber; 3) Add the room-temperature modified sisal fiber into silver ammonia reduction solution for silver deposition, take it out and dry it to obtain the first modified sisal fiber;

[0032] The preparation method of the second modified sisal fiber is as follows: 1) Take 15 parts by weight of diatomite, 50 parts by weight of sisal fiber, 5 parts by weight of hydroxypropyl methylcellulose, 2 parts by weight of sepiolite, and 0.2 parts by weight of acrylic resin adhesive; 2) Mix the diatomite and sepiolite together and activate them at 1000 °C for 4 h, take them out and cool them to room temperature to obtain activated diatomite; 3) Mix the activated diatomite with the weighed sisal fiber, hydroxypropyl methylcellulose, and acrylic resin adhesive evenly, dry and crush them to obtain the second modified sisal fiber;

[0033] The overall mechanical property enhancer includes the following components in parts by weight: 50 parts of arabic gum, 20 parts of carboxymethyl cellulose, 10 parts of guar gum, and 7 parts of polyethylene glycol;

[0034] The anti-adhesion modifier includes the following components in parts by weight: 60 parts of pullulan, 30 parts of polycarbonate, and 20 parts of cinnamaldehyde.

[0035] The preparation method of the above-mentioned sisal fiber-based deodorant material includes the following steps:

[0036] (1) Weigh each component constituting the sisal fiber-based deodorant material according to the weight part ratio;

[0037] (2) Put the first modified sisal fiber and the second modified sisal fiber into a container, add water, and mix and stir at 35 °C to obtain a mixture, wherein the specific gravity of water in the mixture is 60 wt%.

[0038] (3) Add a whole mechanical property enhancer and an anti-adhesion modifier to the mixture and mix evenly; then add an acrylic resin adhesive and mix and stir for 6 min to obtain a blend.

[0039] (4) Put the blend into a deodorant egg mold, inject and mold, and demold to obtain a preliminary egg-shaped product.

[0040] (5) Freeze the preliminary product at -20 °C for 8 h to obtain a frozen preliminary product.

[0041] (6) Air-dry the frozen preliminary product to obtain the sisal fiber-based deodorant material.

[0042] Example 2

[0043] A sisal fiber-based deodorant material, and the weight percentage composition of each component of the sisal fiber-based deodorant material is: 33% of the first modified sisal fiber, 60% of the second modified sisal fiber, 5% of the whole mechanical property enhancer, 1.0% of the anti-adhesion modifier, and 1.0% of the acrylic resin adhesive; wherein, the total proportion of the first modified sisal fiber and the second modified sisal fiber is more than 93%.

[0044] The preparation method of the first modified sisal fiber is as follows: 1) Take sisal fiber and cook it in boiling water for 30 min; then add sodium hydroxide and calcium chloride, the addition amount of sodium hydroxide is 40 g / L, the addition amount of calcium chloride is 60 g / L, continue to stir and react for 5 h, and filter to obtain heat-modified sisal fiber; 2) Put the heat-modified sisal fiber into a hydrochloric acid-sodium chloride aqueous solution with a hydrochloric acid concentration of 0.3 mol / L and a sodium chloride concentration of 0.5 mol / L, stir and react for 3.5 h, then add a sodium hydroxide solution to adjust the solution to neutrality, and filter to obtain room-temperature modified sisal fiber; 3) Add the room-temperature modified sisal fiber into a silver ammonia reduction solution for silver deposition, take it out and dry it to obtain the first modified sisal fiber.

[0045] The preparation method of the second modified sisal fiber is as follows: 1) Take 20 parts by weight of diatomite, 60 parts by weight of sisal fiber, 10 parts by weight of hydroxypropyl methylcellulose, 3 parts by weight of sepiolite, and 0.3 parts by weight of acrylic resin adhesive; 2) Mix the diatomite and sepiolite together, and activate them at 1200 °C for 6 h, take them out and cool them to room temperature to obtain activated diatomite; 3) Mix the activated diatomite with the weighed sisal fiber, hydroxypropyl methylcellulose, and acrylic resin adhesive evenly, dry and crush them to obtain the second modified sisal fiber.

[0046] The overall mechanical property enhancer comprises the following components in parts by weight: 60 parts of gum arabic, 25 parts of carboxymethyl cellulose, 15 parts of guar gum, and 10 parts of polyethylene glycol;

[0047] The anti-adhesion modifier comprises the following components in parts by weight: 80 parts of pullulan, 40 parts of polycarbonate, and 25 parts of cinnamaldehyde.

[0048] The preparation method of the sisal fiber-based deodorant material comprises the following steps:

[0049] (1) Weigh each component constituting the sisal fiber-based deodorant material according to the weight ratio.

[0050] (2) Put the first modified sisal fiber and the second modified sisal fiber into a container, add water, and mix and stir at 40 °C to obtain a mixture, wherein the specific gravity of water in the mixture is 70 wt%.

[0051] (3) Add the overall mechanical property enhancer and the anti-adhesion modifier to the mixture, and mix evenly; then add an acrylic resin adhesive, and mix and stir for 8 min to obtain a blend.

[0052] (4) Put the blend into a deodorant egg mold, carry out injection molding, and demold to obtain an egg-shaped semi-finished product.

[0053] (5) Freeze the semi-finished product at -15 °C for 10 h to obtain a frozen semi-finished product.

[0054] (6) Air-dry the frozen semi-finished product to obtain the sisal fiber-based deodorant material.

[0055] Example 3

[0056] A sisal fiber-based deodorant material, wherein the weight percentage composition of each component of the sisal fiber-based deodorant material is: 40% of the first modified sisal fiber, 54% of the second modified sisal fiber, 4% of the overall mechanical property enhancer, 1.0% of the anti-adhesion modifier, and 1.0% of the acrylic resin adhesive; wherein, the total proportion of the first modified sisal fiber and the second modified sisal fiber is more than 93%;

[0057] The preparation method of the first modified sisal fiber is as follows: 1) Take sisal fiber and cook it in boiling water for 25 min; then add sodium hydroxide and calcium chloride, with the addition amount of sodium hydroxide being 35 g / L and that of calcium chloride being 55 g / L, continue to stir and react for 4 h, filter to obtain heat-modified sisal fiber; 2) Put the heat-modified sisal fiber into an aqueous solution of hydrochloric acid and sodium chloride with a hydrochloric acid concentration of 0.3 mol / L and a sodium chloride concentration of 0.5 mol / L, stir and react for 3 h, then add sodium hydroxide solution to adjust the solution to neutral, filter to obtain room-temperature modified sisal fiber; 3) Add the room-temperature modified sisal fiber into a silver ammonia reducing solution for silver deposition, take it out and dry it to obtain the first modified sisal fiber;

[0058] The preparation method of the second modified sisal fiber is as follows: 1) Take 17 parts by weight of diatomite, 55 parts by weight of sisal fiber, 7 parts by weight of hydroxypropyl methylcellulose, 2.5 parts by weight of sepiolite, and 0.25 parts by weight of acrylic resin adhesive; 2) Mix the diatomite and sepiolite together, and activate them at 1100 °C for 5 h, take them out and cool to room temperature to obtain activated diatomite; 3) Mix the activated diatomite evenly with the weighed sisal fiber, hydroxypropyl methylcellulose, and acrylic resin adhesive, dry and crush them to obtain the second modified sisal fiber;

[0059] The overall mechanical property enhancer includes the following components in parts by weight: 55 parts of gum arabic, 22 parts of carboxymethyl cellulose, 12 parts of guar gum, and 8 parts of polyethylene glycol;

[0060] The anti-sticking modifier includes the following components in parts by weight: 70 parts of pullulan, 35 parts of polycarbonate, and 23 parts of cinnamaldehyde.

[0061] The preparation method of the above sisal fiber-based deodorant material includes the following steps:

[0062] (1) Weigh each component constituting the sisal fiber-based deodorant material according to the weight ratio;

[0063] (2) Put the first modified sisal fiber and the second modified sisal fiber into a container, add water, and mix and stir at 38 °C to obtain a mixture, where the specific gravity of water in the mixture is 65 wt%;

[0064] (3) Add the overall mechanical property enhancer and the anti-sticking modifier to the mixture and mix evenly; then add acrylic resin adhesive and mix and stir for 7 min to obtain a blend;

[0065] (4) Put the blend into a deodorant egg mold, inject and mold, and demold to obtain an egg-shaped semi-finished product;

[0066] (5) Freeze the preliminary product at -18°C for 9 hours to obtain a frozen preliminary product;

[0067] (6) Air-dry the frozen preliminary product to obtain the sisal fiber-based deodorant material.

[0068] Example 4

[0069] A sisal fiber-based deodorant material, the weight percentage composition of each component of the sisal fiber-based deodorant material is: 40% of the first modified sisal fiber, 54% of the second modified sisal fiber, 4% of the overall mechanical property enhancer, 1.0% of the anti-adhesion modifier, and 1.0% of the acrylic resin adhesive; wherein, the total proportion of the first modified sisal fiber and the second modified sisal fiber is more than 93%;

[0070] The first modified sisal fiber is a modified sisal fiber loaded with nano-silver ion bactericide; the second modified sisal fiber is a modified sisal fiber loaded with diatomite adsorbent; both the first modified sisal fiber and the second modified sisal fiber are finished products obtained by purchasing on the market;

[0071] The overall mechanical property enhancer includes the following components in parts by weight: 55 parts of arabic gum, 22 parts of carboxymethyl cellulose, 12 parts of guar gum, and 8 parts of polyethylene glycol;

[0072] The anti-adhesion modifier includes the following components in parts by weight: 70 parts of pullulan, 35 parts of polycarbonate, and 23 parts of cinnamaldehyde.

[0073] The preparation method of the above-mentioned sisal fiber-based deodorant material includes the following steps:

[0074] (1) Weigh each component constituting the sisal fiber-based deodorant material according to the weight part ratio;

[0075] (2) Put the first modified sisal fiber and the second modified sisal fiber into a container, add water, and mix and stir at 38°C to obtain a mixture, and the specific gravity of water in the mixture is 65 wt%;

[0076] (3) Add the overall mechanical property enhancer and the anti-adhesion modifier to the mixture, and mix evenly; then add the acrylic resin adhesive and mix and stir for 7 minutes to obtain a blend;

[0077] (4) Put the blend into a deodorant egg mold, inject and mold, and demold to obtain an egg-shaped preliminary product;

[0078] (5) Freeze the preliminary product at -18°C for 9 hours to obtain a frozen preliminary product;

[0079] (6) Air-dry the frozen preliminary product to obtain the sisal fiber-based deodorant material.

[0080] Example 5

[0081] A sisal fiber-based deodorant material, and the weight percentage composition of each component of the sisal fiber-based deodorant material is: 40% of the first modified sisal fiber, 54% of the second modified sisal fiber, 4% of the overall mechanical property enhancer, 1.0% of the anti-adhesion modifier, and 1.0% of the acrylic resin adhesive; wherein, the total proportion of the first modified sisal fiber and the second modified sisal fiber is above 93%;

[0082] The preparation method of the first modified sisal fiber is: 1) Take sisal fiber and cook it in boiling water for 25 min; then add sodium hydroxide and calcium chloride, the addition amount of sodium hydroxide is 35 g / L, the addition amount of calcium chloride is 55 g / L, continue to stir and react for 4 h, filter to obtain heat-modified sisal fiber; 2) Put the heat-modified sisal fiber into a hydrochloric acid-sodium chloride aqueous solution with a hydrochloric acid concentration of 0.3 mol / L and a sodium chloride concentration of 0.5 mol / L, stir and react for 3 h, then add sodium hydroxide solution to adjust the solution to neutrality, filter to obtain room-temperature modified sisal fiber; 3) Add the room-temperature modified sisal fiber into the silver ammonia reduction solution for silver deposition, take it out and dry it to obtain the first modified sisal fiber;

[0083] The preparation method of the second modified sisal fiber is: 1) Take 17 parts by weight of diatomite, 55 parts by weight of sisal fiber, 7 parts by weight of hydroxypropyl methylcellulose, 2.5 parts by weight of sepiolite, and 0.25 parts by weight of acrylic resin adhesive; 2) Mix the diatomite and sepiolite together, and activate them at 1100 °C for 5 h, take them out and cool them to room temperature to obtain activated diatomite; 3) Mix the activated diatomite with the weighed sisal fiber, hydroxypropyl methylcellulose, and acrylic resin adhesive evenly, dry and pulverize to obtain the second modified sisal fiber;

[0084] The overall mechanical property enhancer includes the following components in parts by weight: 55 parts of arabic gum, 22 parts of carboxymethyl cellulose, 12 parts of guar gum, and 8 parts of polyethylene glycol;

[0085] The anti-adhesion modifier includes the following components in parts by weight: 70 parts of pullulan and 35 parts of polycarbonate.

[0086] The preparation method of the above sisal fiber-based deodorant material includes the following steps:

[0087] (1) Weigh each component constituting the sisal fiber-based deodorant material according to the weight part ratio;

[0088] (2) Put the first modified sisal fiber and the second modified sisal fiber into a container, add water, and mix and stir at 38 °C to obtain a mixture, and the specific gravity of water in the mixture is 65 wt%;

[0089] (3) Add a whole mechanical property enhancer and an anti-adhesion modifier to the mixture, and mix evenly; then add an acrylic resin adhesive and mix and stir for 7 min to obtain a blend.

[0090] (4) Put the blend into a deodorant egg mold, inject and mold, and demold to obtain an egg-shaped preliminary product.

[0091] (5) Freeze the preliminary product at -18 °C for 9 h to obtain a frozen preliminary product.

[0092] (6) Air-dry the frozen preliminary product to obtain the sisal fiber-based deodorant material.

[0093] Comparative Example 1

[0094] A sisal fiber-based deodorant material, and the weight percentage composition of each component of the sisal fiber-based deodorant material is: 40% of the first modified sisal fiber, 54% of the second modified sisal fiber, 1.0% of the anti-adhesion modifier, and 1.0% of the acrylic resin adhesive; wherein, the total proportion of the first modified sisal fiber and the second modified sisal fiber is more than 93%.

[0095] The preparation method of the first modified sisal fiber is as follows: 1) Take sisal fiber and cook it in boiling water for 25 min; then add sodium hydroxide and calcium chloride, the addition amount of sodium hydroxide is 35 g / L, the addition amount of calcium chloride is 55 g / L, continue to stir and react for 4 h, and filter to obtain heat-modified sisal fiber; 2) Put the heat-modified sisal fiber into a hydrochloric acid-sodium chloride aqueous solution with a hydrochloric acid concentration of 0.3 mol / L and a sodium chloride concentration of 0.5 mol / L, stir and react for 3 h, then add a sodium hydroxide solution to adjust the solution to neutral, and filter to obtain room-temperature modified sisal fiber; 3) Add the room-temperature modified sisal fiber into a silver ammonia reduction solution for silver deposition, take it out and dry it to obtain the first modified sisal fiber.

[0096] The preparation method of the second modified sisal fiber is as follows: 1) Take 17 parts by weight of diatomite, 55 parts by weight of sisal fiber, 7 parts by weight of hydroxypropyl methylcellulose, 2.5 parts by weight of sepiolite, and 0.25 parts by weight of acrylic resin adhesive; 2) Mix the diatomite and sepiolite together, and activate them at 1100 °C for 5 h, take them out and cool them to room temperature to obtain activated diatomite; 3) Mix the activated diatomite with the weighed sisal fiber, hydroxypropyl methylcellulose, and acrylic resin adhesive evenly, dry and pulverize to obtain the second modified sisal fiber.

[0097] The anti-adhesion modifier includes the following components in parts by weight: 70 parts of pullulan, 35 parts of polycarbonate, and 23 parts of cinnamaldehyde.

[0098] The preparation method of the above sisal fiber-based deodorant material comprises the following steps:

[0099] (1) Weigh each component of the sisal fiber-based deodorant material according to the weight ratio.

[0100] (2) Put the first modified sisal fiber and the second modified sisal fiber into a container, add water, and mix and stir at 38 °C to obtain a mixture, where the specific gravity of water in the mixture is 65 wt%.

[0101] (3) Add an anti-sticking modifier to the mixture and mix evenly; then add an acrylic resin adhesive and mix and stir for 7 min to obtain a blend.

[0102] (4) Put the blend into a deodorant egg mold, inject and mold, and demold to obtain an egg-shaped semi-finished product.

[0103] (5) Freeze the semi-finished product at -18 °C for 9 h to obtain a frozen semi-finished product.

[0104] (6) Air-dry the frozen semi-finished product to obtain the sisal fiber-based deodorant material.

[0105] Comparative Example 2

[0106] A sisal fiber-based deodorant material, wherein the weight percentage composition of each component of the sisal fiber-based deodorant material is: 40% of the first modified sisal fiber, 54% of the second modified sisal fiber, 4% of the overall mechanical property enhancer, and 1.0% of the acrylic resin adhesive; among them, the total proportion of the first modified sisal fiber and the second modified sisal fiber is more than 93%.

[0107] The preparation method of the first modified sisal fiber is as follows: 1) Take sisal fiber and cook it in boiling water for 25 min; then add sodium hydroxide and calcium chloride, with the addition amount of sodium hydroxide being 35 g / L and the addition amount of calcium chloride being 55 g / L, and continue to stir and react for 4 h, then filter to obtain heat-modified sisal fiber; 2) Put the heat-modified sisal fiber into a hydrochloric acid-sodium chloride aqueous solution with a hydrochloric acid concentration of 0.3 mol / L and a sodium chloride concentration of 0.5 mol / L, stir and react for 3 h, then add sodium hydroxide solution to adjust the solution to neutrality, and filter to obtain room-temperature modified sisal fiber; 3) Add the room-temperature modified sisal fiber into a silver ammonia reduction solution for silver deposition, take it out and dry it to obtain the first modified sisal fiber.

[0108] The preparation method of the second modified sisal fiber is as follows: 1) Take 17 parts by weight of diatomite, 55 parts by weight of sisal fiber, 7 parts by weight of hydroxypropyl methylcellulose, 2.5 parts by weight of sepiolite, and 0.25 parts by weight of acrylic resin adhesive; 2) Mix the diatomite and sepiolite together, and activate them at 1100 °C for 5 h, then take them out and cool to room temperature to obtain activated diatomite; 3) Mix the activated diatomite with the weighed sisal fiber, hydroxypropyl methylcellulose, and acrylic resin adhesive evenly, dry and crush them to obtain the second modified sisal fiber;

[0109] The overall mechanical property enhancer includes the following components in parts by weight: 55 parts of gum arabic, 22 parts of carboxymethyl cellulose, 12 parts of guar gum, and 8 parts of polyethylene glycol.

[0110] The preparation method of the above sisal fiber-based deodorant material includes the following steps:

[0111] (1) Weigh each component constituting the sisal fiber-based deodorant material according to the weight ratio;

[0112] (2) Put the first modified sisal fiber and the second modified sisal fiber into a container, add water, and mix and stir at 38 °C to obtain a mixture, and the specific gravity of water in the mixture is 65 wt%;

[0113] (3) Add the overall mechanical property enhancer to the mixture and mix evenly; then add the acrylic resin adhesive and mix and stir for 7 min to obtain a blend;

[0114] (4) Put the blend into a deodorant egg mold, inject and mold, and demold to obtain an egg-shaped semi-finished product;

[0115] (5) Freeze the semi-finished product at -18 °C for 9 h to obtain a frozen semi-finished product;

[0116] (6) Air-dry the frozen semi-finished product to obtain the sisal fiber-based deodorant material.

[0117] Comparative Example 3

[0118] A sisal fiber-based deodorant material, and the weight percentage composition of each component of the sisal fiber-based deodorant material is: 94% of the second modified sisal fiber, 4% of the overall mechanical property enhancer, 1.0% of the anti-adhesion modifier, and 1.0% of the acrylic resin adhesive;

[0119] The preparation method of the second modified sisal fiber is as follows: 1) Take 17 parts by weight of diatomite, 55 parts by weight of sisal fiber, 7 parts by weight of hydroxypropyl methylcellulose, 2.5 parts by weight of sepiolite, and 0.25 parts by weight of acrylic resin adhesive; 2) Mix the diatomite and sepiolite together, and place them in an activation condition at 1100 °C for 5 h, take out and cool to room temperature to obtain activated diatomite; 3) Mix the activated diatomite evenly with the weighed sisal fiber, hydroxypropyl methylcellulose, and acrylic resin adhesive, dry and pulverize to obtain the second modified sisal fiber;

[0120] The overall mechanical property enhancer includes the following components in parts by weight: 55 parts of gum arabic, 22 parts of carboxymethyl cellulose, 12 parts of guar gum, and 8 parts of polyethylene glycol;

[0121] The anti-sticking modifier includes the following components in parts by weight: 70 parts of pullulan, 35 parts of polycarbonate, and 23 parts of cinnamaldehyde.

[0122] The preparation method of the above sisal fiber-based deodorant material includes the following steps:

[0123] (1) Weigh each component constituting the sisal fiber-based deodorant material according to the weight part ratio;

[0124] (2) Put the second modified sisal fiber into a container, add water, and mix and stir at 38 °C to obtain a mixture, and the specific gravity of water in the mixture is 65 wt%;

[0125] (3) Add the overall mechanical property enhancer and anti-sticking modifier to the mixture and mix evenly; then add the acrylic resin adhesive and mix and stir for 7 min to obtain a blend;

[0126] (4) Put the blend into a deodorant egg mold, carry out injection molding and demolding to obtain an egg-shaped semi-finished product;

[0127] (5) Freeze the semi-finished product at -18 °C for 9 h to obtain a frozen semi-finished product;

[0128] (6) Air-dry the frozen semi-finished product to obtain the sisal fiber-based deodorant material.

[0129] Comparative Example 4

[0130] A sisal fiber-based deodorant material, and the weight percentage composition of each component of the sisal fiber-based deodorant material is: 94% of the first modified sisal fiber, 4% of the overall mechanical property enhancer, 1.0% of the anti-sticking modifier, and 1.0% of the acrylic resin adhesive;

[0131] The preparation method of the first modified sisal fiber is as follows: 1) Take sisal fiber and cook it in boiling water for 25 min; then add sodium hydroxide and calcium chloride, with the addition amount of sodium hydroxide being 35 g / L and that of calcium chloride being 55 g / L, continue to stir and react for 4 h, filter to obtain heat-modified sisal fiber; 2) Put the heat-modified sisal fiber into an aqueous solution of hydrochloric acid and sodium chloride with a hydrochloric acid concentration of 0.3 mol / L and a sodium chloride concentration of 0.5 mol / L, stir and react for 3 h, then add sodium hydroxide solution to adjust the solution to neutrality, filter to obtain room-temperature modified sisal fiber; 3) Add the room-temperature modified sisal fiber into a silver ammonia reducing solution for silver deposition, take it out and dry it to obtain the first modified sisal fiber;

[0132] The overall mechanical property enhancer includes the following components in parts by weight: 55 parts of arabic gum, 22 parts of carboxymethyl cellulose, 12 parts of guar gum, and 8 parts of polyethylene glycol;

[0133] The anti-adhesion modifier includes the following components in parts by weight: 70 parts of pullulan, 35 parts of polycarbonate, and 23 parts of cinnamaldehyde.

[0134] The preparation method of the above sisal fiber-based deodorant material includes the following steps:

[0135] (1) Weigh each component constituting the sisal fiber-based deodorant material according to the weight part ratio;

[0136] (2) Put the first modified sisal fiber into a container, add water, and mix and stir at 38 °C to obtain a mixture, where the specific gravity of water in the mixture is 65 wt%;

[0137] (3) Add the overall mechanical property enhancer and the anti-adhesion modifier to the mixture and mix evenly; then add an acrylic resin adhesive, mix and stir for 7 min to obtain a blend;

[0138] (4) Put the blend into a deodorant egg mold, inject and mold, and demold to obtain an egg-shaped semi-finished product;

[0139] (5) Freeze the semi-finished product at -18 °C for 9 h to obtain a frozen semi-finished product;

[0140] (6) Air-dry the frozen semi-finished product to obtain the sisal fiber-based deodorant material.

[0141] Table 1 below gives the performance measurement results of the sisal fiber-based deodorant materials prepared in Examples 1-5 and Comparative Examples 1-4.

[0142] Table 1

[0143]

[0144] In Table 1 above, the adsorption amounts of methanethiol and trimethylamine refer to the amounts of methanethiol and trimethylamine adsorbed when 100 mg of the sisal fiber-based deodorant material is adsorbed for 5 minutes.

[0145] From the above performance measurement results, for a sisal fiber-based deodorant material and its preparation method of the present invention, the moisture-absorbing and deodorizing main material is composed of the first modified sisal fiber and the second modified sisal fiber. With their mutual cooperation, the moisture-absorbing and deodorizing effect is better; a whole mechanical property enhancer is added to prevent the deodorant material from cracking and deforming under high humidity and temperature changes. The gum arabic, carboxymethyl cellulose, and guar gum in the whole mechanical property enhancer cooperate with each other to make it have strong adhesiveness and thickening properties, and at the same time make the moisture-absorbing and deodorizing main material disperse more evenly. Coupled with the dispersing and bonding effect of polyethylene glycol, it effectively improves the overall mechanical properties of the product; an anti-adhesion modifier is added to prevent the surface of the deodorant material from freezing and adhering to the items or the inner wall of the refrigerator. Pullulan polysaccharide and polycarbonate in the anti-adhesion modifier play a role in forming a film on the surface of the product to prevent adhesion; under the interaction of multiple components, the problems that the deodorant material cracks and deforms under high humidity and temperature changes, and the surface of the deodorant material is easy to freeze and adhere to the items or the inner wall of the refrigerator are effectively solved. At the same time, the problems of melting and falling off of the moisture-absorbing and deodorizing main material and product discoloration are effectively solved, overcoming the problem that the existing sisal fiber deodorant products cannot be used well in the refrigerator; the anti-adhesion modifier also includes cinnamaldehyde. Cinnamaldehyde is safe, environmentally friendly, fragrant, and has excellent antibacterial effects. In addition to helping to form a film and prevent adhesion, it can also keep the color of the sisal fiber-based deodorant material bright, further improving the quality of the sisal fiber-based deodorant material.

[0146] Although the present invention has been described in detail with general descriptions and specific embodiments above, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A sisal fiber-based deodorant material, characterized in that, The sisal fiber-based deodorant material includes a first modified sisal fiber for odor absorption and sterilization, a second modified sisal fiber for moisture absorption and deodorization, an overall mechanical property enhancer for preventing the deodorant material from cracking and deforming under high humidity and temperature changes, an anti-sticking modifier for preventing the surface of the deodorant material from icing and sticking to the items or the inner wall of the refrigerator, and an acrylic resin adhesive; The weight percentage composition of each component of the sisal fiber-based deodorant material is: 25% - 60% of the first modified sisal fiber, 25% - 60% of the second modified sisal fiber, 3% - 5% of the overall mechanical property enhancer, 0.5% - 1.0% of the anti-sticking modifier, and 0.8% - 1.0% of the acrylic resin adhesive; among them, the total proportion of the first modified sisal fiber and the second modified sisal fiber is more than 93%; The first modified sisal fiber is a modified sisal fiber loaded with nano silver ion bactericide; the second modified sisal fiber is a modified sisal fiber loaded with diatomite adsorbent; The overall mechanical property enhancer includes the following components in parts by weight: 50 - 60 parts of gum arabic, 20 - 25 parts of carboxymethyl cellulose, 10 - 15 parts of guar gum, and 7 - 10 parts of polyethylene glycol; The anti-sticking modifier includes the following components in parts by weight: 60 - 80 parts of pullulan and 30 - 40 parts of polycarbonate.

2. The sisal fiber-based deodorant material according to claim 1, characterized in that, The weight percentage composition of each component of the sisal fiber-based deodorant material is: 30% - 60% of the first modified sisal fiber, 30% - 60% of the second modified sisal fiber, 4% - 5% of the overall mechanical property enhancer, 0.8% - 1.0% of the anti-sticking modifier, and 0.9% - 1.0% of the acrylic resin adhesive; among them, the total proportion of the first modified sisal fiber and the second modified sisal fiber is more than 93%.

3. The sisal fiber-based deodorant material according to claim 1, wherein The preparation method of the first modified sisal fiber is as follows: 1) Take sisal fiber and cook it in boiling water for 20 - 30 min; then add sodium hydroxide and calcium chloride, the addition amount of sodium hydroxide is 30 - 40 g / L, the addition amount of calcium chloride is 50 - 60 g / L, continue to stir and react for 3 - 5 h, filter to obtain heat-modified sisal fiber; 2) Put the heat-modified sisal fiber into a hydrochloric acid-sodium chloride aqueous solution with a hydrochloric acid concentration of 0.3 mol / L and a sodium chloride concentration of 0.5 mol / L and stir and react for 2.5 - 3.5 h, then add alkali to adjust the solution to neutral, filter to obtain room-temperature modified sisal fiber; 3) Add the room-temperature modified sisal fiber into a silver ammonia reduction solution for silver deposition, take it out and dry it to obtain the first modified sisal fiber.

4. The sisal fiber-based deodorant material according to claim 1, wherein The preparation method of the second modified sisal fiber is as follows: 1) Take 15-20 parts by weight of diatomite, 50-60 parts by weight of sisal fiber, 5-10 parts by weight of hydroxypropyl methylcellulose, 2-3 parts by weight of sepiolite, and 0.2-0.3 parts by weight of acrylic resin adhesive; 2) Mix the diatomite and sepiolite together, and place them in an activation condition at 1000-1200 °C for 4-6 h, take out and cool to room temperature to obtain activated diatomite; 3) Mix the activated diatomite with the weighed sisal fiber, hydroxypropyl methylcellulose, and acrylic resin adhesive evenly, dry and pulverize to obtain the second modified sisal fiber.

5. The sisal fiber-based deodorant material according to claim 1, wherein The overall mechanical property enhancer includes the following components in parts by weight: 55-60 parts of gum arabic, 22-25 parts of carboxymethyl cellulose, 12-15 parts of guar gum, and 8-10 parts of polyethylene glycol.

6. The sisal fiber-based deodorant material according to claim 1, wherein The anti-adhesion modifier includes the following components in parts by weight: 70-80 parts of pullulan polysaccharide, 35-40 parts of polycarbonate.

7. The sisal fiber-based deodorant material according to claim 1, characterized in that, The anti-adhesion modifier further includes 20-25 parts by weight of cinnamaldehyde.

8. The preparation method of a sisal fiber-based deodorant material according to any one of claims 1 to 7, characterized in that, It includes the following steps: (1) Weigh each component constituting the sisal fiber-based deodorant material according to the weight part ratio. (2) Put the first modified sisal fiber and the second modified sisal fiber into a container, add water and mix and stir to obtain a mixture, and the specific gravity of water in the mixture is 60-70 wt%. (3) Add the overall mechanical property enhancer and the anti-adhesion modifier to the mixture and mix evenly; then add the acrylic resin adhesive and mix and stir for 6-8 min to obtain a blend. (4) Put the blend into a mold, inject and mold, and demold to obtain a preliminary product. (5) Freeze the preliminary product at -20 °C to -15 °C for 8-10 h to obtain a frozen preliminary product. (6) Air-dry the frozen preliminary product to obtain the sisal fiber-based deodorant material.

9. The preparation method of a sisal fiber-based deodorant material according to claim 8, characterized in that, In step (2), put the first modified sisal fiber and the second modified sisal fiber into a container, add water, and mix and stir at 35-40 °C to obtain a mixture, and the specific gravity of water in the mixture is 65-70 wt%.

10. The preparation method of a sisal fiber-based deodorant material according to claim 8, characterized in that, Freeze the preliminary product at -18 °C to -15 °C for 9-10 h to obtain a frozen preliminary product.

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