An antistatic thermal fabric

Abstract

This invention discloses an antistatic and thermal fabric, belonging to the field of functional fabric technology. It is a blend of polyester fiber, lyocell fiber, and wool fiber, with a mass ratio of 100:65-75:35-45. The polyester fiber is obtained by melt spinning PET chips and modified carbon nanotubes; the mass ratio of PET chips to modified carbon nanotubes is 50:5-7. The fabric of this invention is a blend of polyester fiber, lyocell fiber, and wool fiber. Lyocell and wool fibers provide the fabric with excellent comfort, breathability, moisture permeability, and warmth. The addition of modified carbon nanotubes to the polyester fiber not only imparts uniform, durable, and efficient antistatic properties but also enhances the fiber's toughness and antibacterial properties to a certain extent. Therefore, the resulting fabric possesses durable, uniform, and efficient antistatic properties, as well as warmth and comfort, making it of significant application value.

Description

Technical Field

[0001] This invention belongs to the field of functional fabric technology, specifically, it relates to an antistatic and thermal insulation fabric. Background Technology

[0002] Synthetic fibers, yarns, and fabrics are prone to static electricity during processing or use due to friction and other factors. Static-charged fibers easily attract dust and form dirt, and the attraction or repulsion of charges during processing can increase processing difficulty. During spinning, static electricity causes poor fiber cohesion, tangling, and breakage, affecting the smooth flow of yarn. When the accumulated static voltage exceeds 500V, it can easily generate sparks due to discharge, causing a fire. Furthermore, with the widespread use of electronic products such as computer communication networks, mobile phones, audio-visual equipment, computers, and air conditioners, these devices are highly sensitive to static electricity; therefore, reducing static electricity on fabrics is becoming increasingly important.

[0003] Traditional antistatic fibers are made by applying an antistatic agent to the surface of ordinary polyester fibers or fabrics to increase their hydrophilicity and moisture absorption, thus preventing static electricity from accumulating on the fibers. However, this antistatic effect easily disappears after washing and rubbing. Moreover, fabrics produced using this method result in garments that are expensive, heavy, have poor warmth retention, and are not fashionable or elegant. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an antistatic and thermal insulation fabric.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An antistatic and thermal fabric is made of a blend of polyester fiber, lyocell fiber and wool fiber, with a mass ratio of 100:65-75:35-45.

[0007] Furthermore, the polyester fiber is obtained by melt spinning PET chips and modified carbon nanotubes; the mass ratio of PET chips to modified carbon nanotubes is 50:5-7.

[0008] Furthermore, the modified carbon nanotubes are prepared by the following steps:

[0009] S1. Allyl polyoxyethylene ether (relative molecular mass 2500), AIBN (azobisisobutyronitrile), and DMSO (dimethyl sulfoxide) were mixed and stirred at a ratio of 25g:0.95g:20mL to obtain a reaction solution for later use. Mercaptopropionic acid and DMSO were added to a four-necked flask equipped with a stirrer. The temperature of the system was maintained at 70℃. The reaction solution was added dropwise under stirring. After the addition was completed, the reaction was carried out at 70℃ for 4 hours. After the reaction was completed, distilled water was added for dilution, and then extracted with diethyl ether. The organic phase was collected, dried over anhydrous magnesium sulfate, filtered, and the diethyl ether was distilled off to obtain the intermediate product. The ratio of mercaptopropionic acid, DMSO, and allyl polyoxyethylene ether was 0.01mol:60mL:25g.

[0010] Under the action of AIBN, the unsaturated carbon-carbon double bond on the allyl polyoxyethylene ether molecule undergoes a click reaction with the -SH group on the mercaptopropionic acid molecule to obtain the intermediate product. The reaction process is shown below:

[0011]

[0012] S2. Add the intermediate product, triethylamine, and dichloromethane to a dry three-necked flask equipped with a stirrer, a reflux condenser, and a nitrogen delivery tube. Purge with nitrogen for 10 minutes, then add a DMSO solution of 2,6-diaminopyridine and DIC (N,N-diisopropylcarbodiimide, a dehydrating agent). After the addition is complete, stir the reaction at room temperature under N2 protection for 3 hours. After the reaction is complete, remove the solvents (dichloromethane and DMSO) by rotary evaporation to obtain the modifier. The ratio of the intermediate product, triethylamine, 2,6-diaminopyridine, and DIC is 27.4 g:1.0 g:1.1 g:1.3 g; the concentration of the DMSO solution of 2,6-diaminopyridine is 1.1 g / 10 mL.

[0013] Under the action of triethylamine and DIC, the -COOH on the intermediate molecule undergoes an amidation reaction with the -NH2 on the 2,6-diaminopyridine molecule. By controlling the molar ratio of the two to be close to 1:1 and with a slight excess of the intermediate, only one -NH2 on the 2,6-diaminopyridine molecule participates in the reaction, thus obtaining the modifier. The process is shown below:

[0014]

[0015] S3. Mix the modifier with DMF (N,N-dimethylformamide), add DCC (dicyclohexylcarbodiimide) and DMAP (4-dimethylaminopyridine), and stir magnetically for 1 hour to obtain a solution. Then, mix the carboxylated carbon nanotubes with the solution at a solid-liquid ratio of 1g:15mL, stir magnetically for 2 hours, and then sonicate in a 60℃ water bath for 2 hours. After removing the water bath, stir magnetically at room temperature for 24 hours. Filter and wash with anhydrous ethanol 3-4 times, dry, and grind to obtain pre-modified carbon nanotubes. The ratio of modifier, DMF, DCC, and DMAP in the solution is 28.2g:50mL:0.9g:0.08g.

[0016] Under the action of DCC and DMAP, the -COOH on the surface of carboxylated carbon nanotubes undergoes an amidation reaction with the -NH2 on the modifier molecules, grafting the modifier molecular chains onto the carbon nanotube surface to obtain pre-modified carbon nanotubes. The reaction process is shown below:

[0017]

[0018] S4. Mix the pre-modified carbon nanotubes with acetonitrile, sonicate for 1 hour, then add iodomethane, stir and react at room temperature for 12 hours. After the reaction is complete, filter, wash with anhydrous ethanol 3-4 times, dry, and grind to obtain modified carbon nanotubes. The ratio of the amount of pre-modified carbon nanotubes to iodomethane is 1 g: 2.84 g.

[0019] The pyridine N on the pre-modified carbon nanotube grafted modifier molecule undergoes an alkylation reaction with iodomethane to yield a quaternized product. The reaction process is shown below:

[0020]

[0021] The modified carbon nanotubes obtained are grafted with long organic molecular chains through chemical bonding, forming an organic layer on their surface. This significantly improves the interfacial compatibility between the carbon nanotubes and the polyester matrix, thereby promoting the uniform dispersion of the carbon nanotubes. The carbon nanotubes themselves possess excellent electrical conductivity, and their uniform dispersion in the polyester enhances their antistatic effect, endowing the polyester fibers with good antistatic properties. Furthermore, the grafted organic molecular chains contain quaternary ammonium salt functional groups. These groups not only de-complex to generate positive and negative ions for ionic conductivity, further improving the fiber's antistatic properties, but also possess safe antibacterial effects, imparting a certain degree of antibacterial activity to the fiber. Additionally, the grafted long organic molecular chains are highly flexible, capable of penetrating between polyester macromolecular chains, thus providing a toughening effect and improving the impact resistance of the polyester fibers. Moreover, the addition of modified carbon nanotubes makes them less prone to failure with washing and prolonged use, exhibiting washability and a durable antistatic effect.

[0022] Furthermore, carboxylated carbon nanotubes are prepared through the following steps:

[0023] Carbon nanotubes were placed in an Erlenmeyer flask, then mixed acid was added, and the mixture was ultrasonically treated in a 50°C water bath for 6 hours. After the mixture cooled to room temperature, it was diluted with deionized water, centrifuged, and washed 4-5 times with anhydrous ethanol and deionized water, respectively. The mixture was then dried and ground to obtain carboxylated carbon nanotubes. The mixed acid was a mixture of 98% concentrated sulfuric acid and 37.5% concentrated hydrochloric acid in a volume ratio of 4:1. The ratio of carbon nanotubes to mixed acid was 1 g: 100 mL.

[0024] By subjecting carbon nanotubes to ultrasonic shearing and oxidation with strong acids, a certain number of hydroxyl and carboxyl active groups can be introduced into the sidewalls and tips of the carbon nanotubes, laying the foundation for reaction sites in subsequent chemical reactions.

[0025] The beneficial effects of this invention are:

[0026] The fabric of this invention is a blend of polyester fiber, lyocell fiber, and wool fiber. Lyocell fiber and wool fiber can give the fabric better comfort, breathability, moisture permeability, and warmth. Due to the addition of modified carbon nanotubes to the polyester fiber, it can not only give the fiber uniform, durable, and efficient antistatic properties, but also improve the fiber's toughness and antibacterial properties to a certain extent. Therefore, the obtained fabric has durable, uniform, and efficient antistatic properties, as well as warmth and comfort, and has important application significance. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] Preparation of carboxylated carbon nanotubes:

[0030] 10g of carbon nanotubes were placed in an Erlenmeyer flask, and then 1L of mixed acid (800mL of 98% concentrated sulfuric acid and 200mL of 37.5% concentrated hydrochloric acid) was added. The mixture was ultrasonically treated in a 50℃ water bath for 6h. After the mixture cooled to room temperature, it was diluted with deionized water, centrifuged, and washed 5 times with anhydrous ethanol and deionized water, respectively. The mixture was then dried and ground to obtain carboxylated carbon nanotubes.

[0031] Example 2

[0032] Preparation of modified carbon nanotubes:

[0033] S1. Mix 25g of allyl polyoxyethylene ether (relative molecular mass 2500), 0.95g of AIBN and 20mL of DMSO until homogeneous to obtain a reaction solution for later use. Add 0.01mol of mercaptopropionic acid and 60mL of DMSO to a four-necked flask equipped with a stirrer. Maintain the temperature of the system at 70℃. Add the reaction solution dropwise under stirring. After the addition is complete, react at 70℃ for 4h. After the reaction is complete, dilute with distilled water and then extract with diethyl ether. Take the organic phase, dry it with anhydrous magnesium sulfate, filter it, and distill off the diethyl ether to obtain the intermediate product.

[0034] S2. Add 27.4 g of intermediate product, 1.0 g of triethylamine and dichloromethane to a dry three-necked flask equipped with a stirrer, a reflux condenser and a nitrogen delivery tube. Purge with nitrogen for 10 min, then add a DMSO solution containing 1.1 g of 2,6-diaminopyridine (concentration 1.1 g / 10 mL) and 1.3 g of DIC. After the addition is complete, stir the reaction at room temperature and under N2 protection for 3 h. After the reaction is complete, remove the solvent by rotary evaporation to obtain the modifier.

[0035] S3. Mix 28.2g of modifier with 50mL of DMF, add 0.9g of DCC and 0.08g of DMAP, stir magnetically for 1h to obtain a solution, then mix 10g of carboxylated carbon nanotubes prepared in Example 1 with 30mL of the solution, stir magnetically for 2h, and then place in a 60℃ water bath for 2h of sonication. After removing the water bath, stir magnetically at room temperature for 24h, filter, wash three times with anhydrous ethanol, dry, and grind to obtain pre-modified carbon nanotubes.

[0036] S4. Mix 10g of pre-modified carbon nanotubes with 150mL of acetonitrile, sonicate for 1h, then add 28.4g of iodomethane, stir and react at room temperature for 12h. After the reaction is complete, filter, wash three times with anhydrous ethanol, dry, and grind to obtain modified carbon nanotubes.

[0037] Example 3

[0038] Preparation of modified carbon nanotubes:

[0039] S1. Mix 50g of allyl polyoxyethylene ether (relative molecular mass 2500), 1.9g of AIBN and 40mL of DMSO until homogeneous to obtain a reaction solution for later use. Add 0.02mol of mercaptopropionic acid and 120mL of DMSO to a four-necked flask equipped with a stirrer. Maintain the temperature of the system at 70℃. Add the reaction solution dropwise under stirring. After the addition is complete, react at 70℃ for 4h. After the reaction is complete, dilute with distilled water and then extract with diethyl ether. Take the organic phase, dry it with anhydrous magnesium sulfate, filter it, and distill off the diethyl ether to obtain the intermediate product.

[0040] S2. Add 54.8 g of intermediate product, 2.0 g of triethylamine and dichloromethane to a dry three-necked flask equipped with a stirrer, a reflux condenser and a nitrogen delivery tube. Purge with nitrogen for 10 min, then add 2.2 g of DMSO solution containing 2,6-diaminopyridine (concentration 1.1 g / 10 mL) and 2.6 g of DIC. After the addition is complete, stir the reaction at room temperature and under N2 protection for 3 h. After the reaction is complete, remove the solvent by rotary evaporation to obtain the modifier.

[0041] S3. Mix 56.4g of modifier with 100mL of DMF, add 1.8g of DCC and 0.16g of DMAP, and stir magnetically for 1h to obtain a solution. Then mix 20g of carboxylated carbon nanotubes prepared in Example 1 with 60mL of the solution, stir magnetically for 2h, and then place in a 60℃ water bath for 2h of sonication. After removing the water bath, stir magnetically at room temperature for 24h, filter, wash 4 times with anhydrous ethanol, dry, and grind to obtain pre-modified carbon nanotubes.

[0042] S4. Mix 20g of pre-modified carbon nanotubes with 300mL of acetonitrile, sonicate for 1h, then add 56.8g of iodomethane, stir and react at room temperature for 12h. After the reaction is complete, filter, wash 4 times with anhydrous ethanol, dry, grind, and obtain modified carbon nanotubes.

[0043] Example 4

[0044] Polyester fibers were obtained by melt spinning 500g of PET chips and 50g of modified carbon nanotubes prepared in Example 2.

[0045] Example 5

[0046] Polyester fibers were obtained by melt spinning 500g of PET chips and 60g of modified carbon nanotubes prepared in Example 3.

[0047] Example 6

[0048] Polyester fibers were obtained by melt spinning 500g of PET chips and 70g of modified carbon nanotubes prepared in Example 2.

[0049] Example 7

[0050] An antistatic and thermal fabric is obtained by blending polyester fiber, lyocell fiber and wool fiber obtained in Example 4, with a mass ratio of 100:65:35.

[0051] After the fibers are drawn, roving and spinning are completed, fine yarn is obtained. Then, the fine yarn is wound onto the warp beam and the drum of a loom. The warp yarn on the warp beam and the weft yarn on the drum are interwoven by the shuttle on the loom to obtain the fabric.

[0052] Example 8

[0053] An antistatic and thermal fabric is obtained by blending polyester fiber, lyocell fiber and wool fiber obtained in Example 7, with a mass ratio of 100:70:40.

[0054] After the fibers are drawn, roving and spinning are completed, fine yarn is obtained. Then, the fine yarn is wound onto the warp beam and the drum of a loom. The warp yarn on the warp beam and the weft yarn on the drum are interwoven by the shuttle on the loom to obtain the fabric.

[0055] Example 9

[0056] An antistatic and thermal fabric is obtained by blending polyester fiber, lyocell fiber and wool fiber obtained in Example 5, with a mass ratio of 100:75:45.

[0057] After the fibers are drawn, roving and spinning are completed, fine yarn is obtained. Then, the fine yarn is wound onto the warp beam and the drum of a loom. The warp yarn on the warp beam and the weft yarn on the drum are interwoven by the shuttle on the loom to obtain the fabric.

[0058] The fabrics obtained in Examples 7-9 and the comparative examples were cut into test samples and subjected to the following performance tests:

[0059] The surface charge density (µC / m³) of the fabric was determined according to GB / T 12703.1-2008 "Evaluation of Electrostatic Properties of Textiles". 2 This allows for testing of antistatic properties (the lower the surface charge density, the better the antistatic properties).

[0060] The antibacterial rate (%) of the fabric was tested according to GB / T20944.2-2007 "Evaluation of antibacterial properties of textiles - Part 2: Absorption method".

[0061] The measured results are shown in the table below:

[0062]

[0063]

[0064] As can be seen from the data in the table above, the fabric obtained by this invention has durable, stable and efficient antistatic properties, and also has certain antibacterial properties.

[0065] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. An antistatic and thermal fabric, made from a blend of polyester fiber, lyocell fiber, and wool fiber, characterized in that, The polyester fiber is obtained by melt spinning PET chips and modified carbon nanotubes; The modified carbon nanotubes are prepared through the following steps: S1. Allyl polyoxyethylene ether, AIBN and DMSO were mixed and stirred evenly at a ratio of 25g:0.95g:20mL to obtain a reaction solution for later use. Mercaptopropionic acid and DMSO were added to a four-necked flask equipped with a stirrer. The temperature of the system was maintained at 70℃. The reaction solution was added dropwise under stirring. After the addition was completed, the reaction was carried out at 70℃ for 4 hours. After the reaction was completed, distilled water was added for dilution, and then extracted with diethyl ether. The organic phase was collected, dried over anhydrous magnesium sulfate, filtered, and the diethyl ether was distilled off to obtain the intermediate product. S2. Add the intermediate product, triethylamine and dichloromethane to a dry three-necked flask equipped with a stirrer, a reflux condenser and a nitrogen delivery tube. Purge with nitrogen for 10 minutes, then add DMSO solution of 2,6-diaminopyridine and DIC. After the addition is complete, stir the reaction at room temperature and under N2 protection for 3 hours. After the reaction is complete, remove the solvent by rotary evaporation to obtain the modifier. S3. Mix the modifier with DMF, add DCC and DMAP, and stir magnetically for 1 hour to obtain a solution. Then, mix the carboxylated carbon nanotubes with the solution at a solid-liquid ratio of 1g:15mL, stir magnetically for 2 hours, and then place in a 60℃ water bath for 2 hours of sonication. After removing the water bath, stir magnetically at room temperature for 24 hours. Filter and wash with anhydrous ethanol 3-4 times, dry, and grind to obtain pre-modified carbon nanotubes. S4. The pre-modified carbon nanotubes were mixed with acetonitrile and sonicated for 1 hour. Then, iodomethane was added, and the mixture was stirred at room temperature for 12 hours. After the reaction was completed, the mixture was filtered, washed 3-4 times with anhydrous ethanol, dried, and ground to obtain the modified carbon nanotubes. The molecular structure of the modified carbon nanotubes is shown below:

2. The antistatic thermal insulation fabric according to claim 1, characterized in that, In step S1, the relative molecular mass of allyl polyoxyethylene ether is 2500, and the ratio of mercaptopropionic acid, DMSO and allyl polyoxyethylene ether is 0.01 mol: 60 mL: 25 g.

3. The antistatic thermal fabric according to claim 1, characterized in that, In step S2, the ratio of intermediate product, triethylamine, 2,6-diaminopyridine, and DIC is 27.4 g: 1.0 g: 1.1 g: 1.3 g; the concentration of the DMSO solution of 2,6-diaminopyridine is 1.1 g / 10 mL.

4. The antistatic thermal fabric according to claim 1, characterized in that, In step S3, the ratio of modifier, DMF, DCC and DMAP in the solution is 28.2g:50mL:0.9g:0.08g.

5. The antistatic thermal fabric according to claim 1, characterized in that, In step S4, the ratio of pre-modified carbon nanotubes to iodomethane is 1g:2.84g.

6. The antistatic thermal insulation fabric according to claim 1, characterized in that, It is made by blending polyester fiber, lyocell fiber and wool fiber, with a mass ratio of 100:65-75:35-45.

7. The antistatic thermal fabric according to claim 1, characterized in that, The mass ratio of PET chips to modified carbon nanotubes in polyester fibers is 50:5-7.

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