Hydrotalcite modified synthetic fiber with infrared heat preservation function

Abstract

The invention discloses a hydrotalcite modified synthetic fiber with an infrared thermal insulation function, and belongs to the technical field of hydrotalcite synthetic fibers. According to the heat dissipation infrared wavelength, the composition and the structure of hydrotalcite are regulated and controlled, and a functional object with selective infrared absorption performance in the heat dissipation wavelength range is introduced, so that the infrared absorption performance of the material is remarkably improved, a novel intercalation structure infrared absorption material is developed, and the thermal insulation performance is greatly improved in the wavelength range of 7-14 microns; and a new thought is provided for comprehensive utilization of hydrotalcite.

Description

Technical Field

[0001] The invention relates to the technical field of hydrotalcite synthetic fibers, and in particular to a hydrotalcite modified synthetic fiber with infrared heat-insulating function. Background Art

[0002] At present, textile products usually increase the thickness of textiles or change the shape of fibers to improve their thermal insulation performance. The disadvantage is that the material cost is increased, resulting in a higher price for the end product, or the processing technology is complicated, which indirectly increases the processing cost. The chemical formula of hydrotalcite is Mg6Al2(OH) 16 CO3·4H2O, with its advantages of large output and low price, is an important industrial raw material: in catalysis, hydrotalcite can be used as alkaline catalyst, redox catalyst and catalyst carrier due to its unique structural characteristics; in medicine, hydrotalcite compounds can be used as drugs for treating common diseases such as gastritis, gastric ulcer, duodenal ulcer, etc.; in ion exchange and adsorption, hydrotalcite can be used as anion exchanger. However, its role as an important raw material in the textile field has yet to be developed. Summary of the invention

[0003] In view of the above prior art, the object of the present invention is to provide a hydrotalcite-modified synthetic fiber with infrared heat-insulating function.

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

[0005] The first aspect of the present invention provides a hydrotalcite-modified synthetic fiber with infrared heat preservation function, wherein the hydrotalcite-modified synthetic fiber comprises the following raw materials, by mass fraction: 1-10 parts of modified hydrotalcite, 90-100 parts of polymer resin, 0.1-5 parts of vinyl bisstearamide, and 0.1-10 parts of antioxidant.

[0006] Furthermore, the polymer resin is one or more of polypropylene resin, polyamide resin and polyester resin.

[0007] Furthermore, the antioxidant is at least one of antioxidant 1010 and antioxidant 168.

[0008] The second aspect of the present invention provides a method for preparing the hydrotalcite-modified synthetic fiber, comprising the following steps:

[0009] The raw materials are uniformly mixed to obtain infrared radiation material; the infrared radiation material is kneaded to produce master batches; the obtained master batches are taken and subjected to a filament forming process to obtain hydrotalcite modified synthetic fibers.

[0010] Furthermore, the mixing conditions are: heating temperature 200-400° C., and rotation speed 50-200 rpm.

[0011] Furthermore, the filament forming process is melt spinning or spinneret.

[0012] The third aspect of the present invention provides the use of the hydrotalcite-modified synthetic fiber in textiles.

[0013] Beneficial effects of the present invention:

[0014] The present invention regulates the composition and structure of hydrotalcite according to the heat dissipation infrared wavelength, introduces a functional object with selective infrared absorption performance within the heat dissipation wavelength range, significantly improves its infrared absorption performance, develops a new intercalated structure infrared absorption material, greatly improves the thermal insulation performance within the 7-14μm wavelength range, and provides a new idea for the comprehensive utilization of hydrotalcite. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the Fourier infrared spectrum of pure resin.

[0016] Figure 2 This is the Fourier infrared spectrum after adding hydrotalcite. DETAILED DESCRIPTION

[0017] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0018] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the technical solution of the present application will be described in detail below in conjunction with specific embodiments.

[0019] The wavelength of infrared rays emitted by the human body is generally between 8 and 14 microns. The fiber modified by the intercalated structural material hydrotalcite can greatly improve the thermal insulation performance within the wavelength range of 7-14μm. The present invention uses a special synthesis process to modify the synthetic fiber, such as polypropylene, polyester, nylon, spandex, etc. The synthetic fiber modified by hydrotalcite has improved infrared barrier performance. When the fiber is used in textile products such as clothes, bedding, tents, etc., it can play a good thermal insulation effect and effectively prevent the diffusion and disappearance of heat.

[0020] Synthetic hydrotalcite has highly hydrophilic hydroxyl groups on its surface and is a hydrophilic powder that is unevenly dispersed in polymers. Therefore, in actual use, its surface must be modified to increase the active groups on the powder surface and improve its compatibility with the polymer interface.

[0021] Therefore, the first step of this technical solution is to synthesize and crystallize the hydrotalcite with intercalated structure infrared absorption function and then perform wet surface modification, and the modifier is an anionic surfactant or coupling agent or composite auxiliary agent. The anionic surface modifier is stearic acid and stearate. The coupling agent is not limited to silane coupling agent, such as KH550, KH560, KH570, KH151, KH171, etc.

[0022] Step 2: The surface-modified hydrotalcite is filtered and dried for melt blending modification of polymer materials. The surface-modified hydrotalcite is added to polypropylene, polyethylene terephthalate, polyurethane, polyamide and other resins for granulation, and then prepared into filaments.

[0023] The test materials used in the examples of the present invention that are not specifically described are all conventional test materials in the art and can be purchased through commercial channels. The CAS number of the coupling agent KH550 used in the present invention is 919-30-2, the CAS number of vinyl bisstearamide (EBS) is 110-30-5, the CAS number of antioxidant 1010 is 6683-19-8, and the CAS number of antioxidant 168 is 31570-04-4.

[0024] Example 1

[0025] Preparation of infrared materials

[0026] 1. Preparation of modified hydrotalcite

[0027] The hydrotalcite slurry containing 200 kg of hydrotalcite was stirred and washed by a filter press until the conductivity was ≤500 us / cm, and the hydrotalcite slurry after the salt was removed was obtained; the hydrotalcite slurry was introduced into a modification kettle, at which time, the hydrotalcite solid mass in the hydrotalcite slurry accounted for 10% of the mass of the hydrotalcite slurry, and the heating was turned on and heated to 80°C. After reaching the temperature, 8 kg of modifying material was added, and the modification time was 50 minutes at 80°C, and the stirring speed during the modification was 600 rpm. After the end, the hydrotalcite was filtered and dried to obtain the modified hydrotalcite.

[0028] In 8 kg of modified materials, the mass of anionic surface modifier sodium stearate is 7.5 kg, and the mass of coupling agent KH550 is 0.5 kg. After drying, the water content of the modified hydrotalcite is 0.5%, the average particle size D50 of the modified hydrotalcite powder is 500 nm, and the activation index is 98.

[0029] 2. Mixed spinning

[0030] 3.5 parts by mass of modified hydrotalcite powder, 95 parts by mass of polypropylene resin powder, 0.5 parts by mass of EBS, 0.5 parts by mass of antioxidant 1010 and 0.5 parts by mass of antioxidant 168 were uniformly mixed to obtain an infrared radiation material. The infrared radiation material was mixed using a resin melting and kneading device at a heating temperature of 270° C. and a rotation speed of 100 rpm to produce a masterbatch 1.

[0031] The obtained masterbatch 1 was taken and melt-spun at a heating temperature of 220° C. using a multifilament production apparatus to produce a modified yarn 1 having a fineness of 88 dtex and a single yarn number of 36 f.

[0032] Example 2

[0033] Preparation of infrared materials

[0034] 1. Preparation of modified hydrotalcite

[0035] The hydrotalcite slurry containing 200 kg of hydrotalcite was stirred and washed by a filter press until the conductivity was ≤500 us / cm, and the hydrotalcite slurry after the salt was removed was obtained; the hydrotalcite slurry was introduced into a modification kettle, at which time, the hydrotalcite solid mass in the hydrotalcite slurry accounted for 10% of the mass of the hydrotalcite slurry, and the heating was turned on and heated to 80°C. After reaching the temperature, 8 kg of modifying material was added, and the modification time was 50 minutes at 80°C, and the stirring speed during the modification was 600 rpm. After the end, the hydrotalcite was filtered and dried to obtain the modified hydrotalcite.

[0036] In 8 kg of modified materials, the mass of anionic surface modifier sodium stearate is 7.5 kg, and the mass of coupling agent KH550 is 0.5 kg. After drying, the water content of the modified hydrotalcite is 0.5%, the average particle size D50 of the modified hydrotalcite powder is 500 nm, and the activation index is 98.

[0037] 2. Mixed spinning

[0038] 4 parts by mass of modified hydrotalcite powder, 94.5 parts by mass of polypropylene resin powder, 0.5 parts by mass of EBS, 0.5 parts by mass of antioxidant 1010 and 0.5 parts by mass of antioxidant 168 were uniformly mixed to obtain an infrared radiation material. The infrared radiation material was mixed using a resin melting and kneading device at a heating temperature of 270° C. and a rotation speed of 100 rpm to produce a masterbatch 2.

[0039] The obtained master batch 2 was taken and melt-spun at a heating temperature of 220° C. using a multifilament production apparatus to produce a modified yarn 2 having a fineness of 88 dtex and a single yarn number of 36 f.

[0040] Example 3

[0041] Preparation of infrared materials

[0042] 1. Preparation of modified hydrotalcite

[0043] The hydrotalcite slurry containing 200 kg of hydrotalcite was stirred and washed by a filter press until the conductivity was ≤500 us / cm, and the hydrotalcite slurry after the salt was removed was obtained; the hydrotalcite slurry was introduced into a modification kettle, at which time, the hydrotalcite solid mass in the hydrotalcite slurry accounted for 10% of the mass of the hydrotalcite slurry, and the heating was turned on and heated to 80°C. After reaching the temperature, 8 kg of modifying material was added, and the modification time was 50 minutes at 80°C, and the stirring speed during the modification was 600 rpm. After the end, the hydrotalcite was filtered and dried to obtain the modified hydrotalcite.

[0044] In 8 kg of modified materials, the mass of anionic surface modifier sodium stearate is 7.5 kg, and the mass of coupling agent KH550 is 0.5 kg. After drying, the water content of the modified hydrotalcite is 0.5%, the average particle size D50 of the modified hydrotalcite powder is 500 nm, and the activation index is 98.

[0045] 2. Mixed spinning

[0046] 4.5 parts by mass of modified hydrotalcite powder, 94 parts by mass of polypropylene resin powder, 0.5 parts by mass of EBS, 0.5 parts by mass of antioxidant 1010 and 0.5 parts by mass of antioxidant 168 were uniformly mixed to obtain an infrared radiation material. The infrared radiation material was mixed using a resin melting and kneading device at a heating temperature of 270° C. and a rotation speed of 100 rpm to produce a masterbatch 3.

[0047] The obtained masterbatch 3 was taken and melt-spun at a heating temperature of 220° C. using a multifilament production apparatus to produce a modified yarn 3 having a fineness of 88 dtex and a single yarn number of 36 f.

[0048] Example 4

[0049] Preparation of infrared materials

[0050] 1. Preparation of modified hydrotalcite

[0051] The hydrotalcite slurry containing 200 kg of hydrotalcite was stirred and washed by a filter press until the conductivity was ≤500 us / cm, and the hydrotalcite slurry after the salt was removed was obtained; the hydrotalcite slurry was introduced into a modification kettle, at which time, the hydrotalcite solid mass in the hydrotalcite slurry accounted for 10% of the mass of the hydrotalcite slurry, and the heating was turned on and heated to 80°C. After reaching the temperature, 8 kg of modifying material was added, and the modification time was 50 minutes at 80°C, and the stirring speed during the modification was 600 rpm. After the end, the hydrotalcite was filtered and dried to obtain the modified hydrotalcite.

[0052] In 8 kg of modified materials, the mass of anionic surface modifier sodium stearate is 7.5 kg, and the mass of coupling agent KH550 is 0.5 kg. After drying, the water content of the modified hydrotalcite is 0.5%, the average particle size D50 of the modified hydrotalcite powder is 500 nm, and the activation index is 98.

[0053] 2. Mixed spinning

[0054] 5 parts by mass of modified hydrotalcite powder, 93.5 parts by mass of polypropylene resin powder, 0.5 parts by mass of EBS, 0.5 parts by mass of antioxidant 1010 and 0.5 parts by mass of antioxidant 168 were uniformly mixed to obtain an infrared radiation material. The infrared radiation material was mixed using a resin melting and kneading device at a heating temperature of 270° C. and a rotation speed of 100 rpm to produce a masterbatch 4.

[0055] The obtained masterbatch 4 was taken and melt-spun at a heating temperature of 220° C. using a multifilament production apparatus to produce a modified yarn 4 having a fineness of 88 dtex and a single yarn number of 36 f.

[0056] Comparative Example 1

[0057] The polypropylene resin powder was kneaded using a resin melting and kneading device at a heating temperature of 270° C. and a rotation speed of 100 rpm to produce a master batch 5 .

[0058] The obtained master batch 5 was taken and melt-spun at a heating temperature of 220° C. using a multifilament production apparatus to produce a polypropylene yarn having a fineness of 88 dtex and a single filament number of 36 f.

[0059] Test example

[0060] Modified yarns 1 to 4 prepared in Examples 1 to 4 and the polypropylene yarn prepared in Comparative Example 1 were taken and infrared tests were performed on them.

[0061] Compared with polypropylene thread ( Figure 1 ), the infrared transmittance of modified silk thread 1 to modified silk thread 4 in the 7-14 micron infrared band range is reduced to 44%, 54%, 43%, and 39% respectively. Among them, the modified silk thread 2 prepared in Example 2 ( Figure 2 ), the infrared transmittance is reduced by 54%, and the thermal insulation effect is the best.

[0062] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hydrotalcite-modified synthetic fiber with infrared heat preservation function, characterized in that: The hydrotalcite-modified synthetic fiber comprises the following raw materials by mass fraction: 1-10 parts of modified hydrotalcite, 90-100 parts of polymer resin, 0.1-5 parts of vinyl bisstearamide, and 0.1-10 parts of antioxidant.

2. The hydrotalcite-modified synthetic fiber with infrared heat preservation function according to claim 1, characterized in that: The polymer resin is one or more of polypropylene resin, polyamide resin and polyester resin.

3. The hydrotalcite-modified synthetic fiber with infrared heat preservation function according to claim 1, characterized in that: The antioxidant is at least one of antioxidant 1010 and antioxidant 168.

4. The method for preparing the hydrotalcite-modified synthetic fiber according to any one of claims 1 to 3, characterized in that: The steps include: The raw materials described in claim 1 are uniformly mixed to obtain infrared radiation material; the infrared radiation material is kneaded to produce master batches; the obtained master batches are taken and subjected to a filament forming process to obtain hydrotalcite modified synthetic fibers.

5. The method for preparing the hydrotalcite-modified synthetic fiber according to claim 4, characterized in that: The mixing conditions are heating temperature 200-400°C and rotation speed 50-200 rpm.

6. The method for preparing the hydrotalcite-modified synthetic fiber according to claim 4, characterized in that: The filament forming process is melt spinning or spinneret.

7. Use of the hydrotalcite-modified synthetic fiber according to any one of claims 1 to 3 in textiles.

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