A type of fiber for headscarves and its preparation method

Abstract

This invention relates to the field of textile materials technology, and proposes a fiber for headscarves and its preparation method. The fiber for headscarves comprises the following components by weight: 100 parts PET resin, 2-4 parts modified graphene oxide, 8-10 parts toughening agent, and 0.5-1 parts antioxidant; the modified graphene oxide comprises the following raw materials by weight: 2-5 parts gallic acid fatty ester and 1 part graphene oxide. This technical solution solves the problem of low strength in existing PET fibers for headscarves.

Description

Technical Field

[0001] This invention relates to the field of textile materials technology, specifically to a fiber for headscarves and its preparation method. Background Technology

[0002] Headscarves are commonly used textile products for daily wear, outdoor protection, and sweat absorption during sports. They have stringent requirements for the core indicators such as the mechanical properties of the fibers used. Currently, most headscarve fibers on the market are made of PET (polyethylene terephthalate) fiber, which has advantages such as readily available raw materials, good formability, moderate cost, and easy spinning processing, making it the mainstream choice for headscarf base materials.

[0003] However, pure PET fiber has significant drawbacks. Its inherent tensile strength is insufficient, and after prolonged wear, stretching, washing, and rubbing, it is prone to pilling, breakage, and deformation, resulting in a short lifespan. To improve PET fiber performance, the industry often uses inorganic fillers (such as graphene oxide) as reinforcing phases. Their high specific surface area, high strength, and high modulus can significantly improve the mechanical properties of the polymer matrix. However, pure graphene oxide exhibits poor heterogeneous dispersion and is prone to agglomeration in PET, resulting in weak interfacial bonding with PET resin. Under external forces, it is susceptible to interfacial debonding and stress concentration, which not only limits the reinforcing effect but also leads to large fluctuations in fiber mechanical properties and reduced spinnability. Therefore, developing a high-strength PET fiber material suitable for the wearing and processing needs of headscarves is of great significance. Summary of the Invention

[0004] This invention proposes a fiber for headscarves and its preparation method, which solves the problem of low strength of PET fibers for headscarves in related technologies.

[0005] The technical solution of the present invention is as follows: This invention proposes a fiber for headscarves, comprising the following components by weight: 100 parts PET resin, 2-4 parts modified graphene oxide, 8-10 parts toughening agent, and 0.5-1 part antioxidant; The modified graphene oxide comprises the following raw materials in parts by weight: 2-5 parts gallic acid fatty ester and 1 part graphene oxide.

[0006] As a further technical solution, the gallic acid fatty ester includes C1~C12 straight-chain alkyl gallic acid esters.

[0007] As a further technical solution, the gallic acid fatty ester includes C3~C8 straight-chain alkyl gallic acid esters.

[0008] In this invention, the strength of the headscarf fiber is further improved by modifying graphene oxide with straight-chain alkyl gallic acid esters with carbon chain lengths of C3 to C8. Specifically, when the carbon chain length is less than 3, the carbon chain is too short and too polar, resulting in poor dispersion and compatibility enhancement. When the carbon chain length is greater than 8, the excessively long carbon chain leads to greater flexibility but decreased strength.

[0009] As a further technical solution, the preparation method of the modified graphene oxide includes the following steps: Gallic acid fatty ester was dissolved in a solvent, graphene oxide was added and mixed, filtered, washed and dried to obtain the modified graphene oxide.

[0010] As a further technical solution, the mixing temperature is 60~70℃, and the mixing time is 7~8h.

[0011] As a further technical solution, the mass ratio of the graphene oxide to the solvent is 2~5:80.

[0012] As a further technical solution, the solvent includes ethanol and / or methanol.

[0013] As a further technical solution, the toughening agent includes maleic anhydride-grafted POE and / or polybutylene succinate.

[0014] As a further technical solution, when the toughening agent includes maleic anhydride-grafted POE and polybutylene succinate, the mass ratio of maleic anhydride-grafted POE to polybutylene succinate is 3:1~2.

[0015] In this invention, maleic anhydride-grafted POE and polybutylene succinate are combined as toughening agents to further improve the strength of the fibers used in headscarves. Maleic anhydride-grafted POE is an elastic phase that can absorb stress and prevent crack propagation, while polybutylene succinate is a rigid, compatible phase with polyester, exhibiting better compatibility with PET and modified graphene oxide, higher modulus, and stronger structural support. The combination of these two components forms a composite network with rigid support and flexible dissipation.

[0016] As a further technical solution, the antioxidant includes one or more of antioxidant 1010, antioxidant 1076, antioxidant 3114 and antioxidant 168.

[0017] This invention also proposes a method for preparing fibers for headscarves, comprising the following steps: S1. After mixing all components evenly, a premix is ​​obtained; S2. The premixed material is melt-blended and then extruded and granulated to obtain masterbatch. S3. After the masterbatch is melt-spun, it is cooled and shaped, and then hot-stretched to obtain the fiber for the headscarf.

[0018] The working principle and beneficial effects of this invention are as follows: In this invention, the strength of the fibers used in headscarves is improved by adding graphene oxide modified with gallic acid fatty ester. After modification with gallic acid fatty ester, the ester group segments of the gallic acid fatty ester significantly improve the interfacial compatibility between graphene oxide and PET resin, and make the graphene oxide more uniformly dispersed, thereby reducing interfacial defects and effectively withstanding external loads. Detailed Implementation

[0019] 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.

[0020] In the following examples and comparative examples, the PET resin is CR-8816; the maleic anhydride-grafted POE is FUSABOND™ N216; and the polybutylene succinate is HX-ZBE101.

[0021] Example 1 A type of fiber for headscarves comprises the following components in parts by weight: 100 parts PET resin, 2 parts modified graphene oxide, 8 parts maleic anhydride-grafted POE, and 0.5 parts antioxidant 1010. The preparation method of modified graphene oxide includes the following steps: Dissolve 2 parts of propyl gallate in 80 parts of ethanol, add 1 part of graphene oxide, mix at 60°C for 8 hours, filter, wash, and dry to obtain modified graphene oxide. A method for preparing fibers for headscarves includes the following steps: S1. After mixing all components evenly, a premix is ​​obtained; S2. The premixed material is melt-blended and then extruded and granulated to obtain masterbatch. S3. After the masterbatch is melt-spun, it is cooled and shaped under an airflow of 30°C and 0.8m / s. Then it is heat-stretched once at 80°C, then heat-stretched twice at 150°C, and finally heat-shaped at 145°C to obtain the fiber for headscarves.

[0022] Example 2 A type of fiber for headscarves comprises the following components in parts by weight: 100 parts PET resin, 4 parts modified graphene oxide, 10 parts maleic anhydride-grafted POE, 0.5 parts antioxidant 1010, and 0.5 parts antioxidant 168. The preparation method of modified graphene oxide includes the following steps: Dissolve 5 parts of propyl gallate in 80 parts of ethanol, add 1 part of graphene oxide, mix at 70°C for 7 hours, filter, wash, and dry to obtain modified graphene oxide. A method for preparing fibers for headscarves includes the following steps: S1. After mixing all components evenly, a premix is ​​obtained; S2. The premixed material is melt-blended and then extruded and granulated to obtain masterbatch. S3. After the masterbatch is melt-spun, it is cooled and shaped under an airflow of 30°C and 0.8m / s. Then it is heat-stretched once at 80°C, then heat-stretched twice at 150°C, and finally heat-shaped at 145°C to obtain the fiber for headscarves.

[0023] Example 3 A type of fiber for headscarves comprises the following components in parts by weight: 100 parts PET resin, 3 parts modified graphene oxide, 9 parts maleic anhydride-grafted POE, and 0.8 parts antioxidant 1010. The preparation method of modified graphene oxide includes the following steps: Dissolve 3.5 parts of propyl gallate in 80 parts of ethanol, add 1 part of graphene oxide, mix at 65°C for 7.5 h, filter, wash, and dry to obtain modified graphene oxide. A method for preparing fibers for headscarves includes the following steps: S1. After mixing all components evenly, a premix is ​​obtained; S2. The premixed material is melt-blended and then extruded and granulated to obtain masterbatch. S3. After the masterbatch is melt-spun, it is cooled and shaped under an airflow of 30°C and 0.8m / s. Then it is heat-stretched once at 80°C, then heat-stretched twice at 150°C, and finally heat-shaped at 145°C to obtain the fiber for headscarves.

[0024] Example 4 The only difference between this embodiment and Embodiment 2 is that propyl gallate is replaced with an equal amount of octyl gallate.

[0025] Example 5 The only difference between this embodiment and Embodiment 2 is that propyl gallate is replaced with an equal amount of methyl gallate.

[0026] Example 6 The only difference between this embodiment and Embodiment 2 is that propyl gallate is replaced with an equal amount of dodecyl gallate.

[0027] Example 7 The only difference between this embodiment and Example 4 is that maleic anhydride-grafted POE is replaced with an equal amount of polybutylene succinate.

[0028] Example 8 The only difference between this embodiment and Embodiment 4 is that 10 parts of maleic anhydride-grafted POE are replaced with 7.5 parts of maleic anhydride-grafted POE and 2.5 parts of polybutylene succinate.

[0029] Example 9 The only difference between this embodiment and Embodiment 4 is that 10 parts of maleic anhydride-grafted POE are replaced with 6 parts of maleic anhydride-grafted POE and 4 parts of polybutylene succinate.

[0030] Example 10 The only difference between this embodiment and Embodiment 4 is that 10 parts of maleic anhydride-grafted POE are replaced with 9 parts of maleic anhydride-grafted POE and 1 part of polybutylene succinate.

[0031] Example 11 The only difference between this embodiment and Embodiment 4 is that 10 parts of maleic anhydride-grafted POE are replaced with 4 parts of maleic anhydride-grafted POE and 6 parts of polybutylene succinate.

[0032] Comparative Example 1 The only difference between this comparative example and Example 2 is that the modified graphene oxide is replaced with an equal amount of graphene oxide.

[0033] Experimental Example 1 The headscarf fibers obtained in Examples 1-11 and Comparative Example 1 were tested for breaking strength according to the method specified in GB / T14344-2022 "Test Method for Tensile Properties of Chemical Fiber Filaments". During the test, the spacing length was 500 mm and the moving clamp speed was 250 mm / min. The test results are shown in Table 1. Table 1. Fracture strength test results

[0034] Comparing the data from Examples 1-9 and Comparative Example 1, the headscarf fibers prepared in Examples 1-9 by modifying graphene oxide with gallic acid fatty esters showed higher breaking strength than those in Comparative Example 1. This indicates that modifying graphene oxide with gallic acid fatty esters improves the strength of the headscarf fibers. Comparing the data from Examples 1-6, the headscarf fibers prepared in Examples 1-4 by modifying graphene oxide with propyl gallate or octyl gallate showed higher breaking strength than those in Examples 5-6. This indicates that modifying graphene oxide with C3-C8 linear alkyl gallate esters can further improve the strength of the headscarf fibers.

[0035] By comparing the data from Examples 4 and 7-11, it was found that the tensile strength of the headscarf fibers obtained by combining maleic anhydride-grafted POE and polybutylene succinate in Examples 8-11 was higher than that in Examples 4 and 7. This indicates that the strength of the headscarf fibers can be further improved by combining maleic anhydride-grafted POE and polybutylene succinate. By comparing the data from Examples 8-11, it was found that the strength of the headscarf fibers was further improved in Examples 10-11 by optimizing the mass ratio of maleic anhydride-grafted POE to polybutylene succinate to 3:1-2.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fiber for headscarves, characterized in that, It includes the following components by weight: 100 parts PET resin, 2-4 parts modified graphene oxide, 8-10 parts toughening agent, and 0.5-1 part antioxidant; The modified graphene oxide comprises the following raw materials in parts by weight: 2-5 parts gallic acid fatty ester and 1 part graphene oxide.

2. The fiber for a headscarf according to claim 1, characterized in that, The gallic acid fatty esters include C1~C12 straight-chain alkyl gallic esters.

3. The fiber for a headscarf according to claim 2, characterized in that, The gallic acid fatty esters include C3-C8 straight-chain alkyl gallic acid esters.

4. The fiber for a headscarf according to claim 1, characterized in that, The method for preparing the modified graphene oxide includes the following steps: Gallic acid fatty ester was dissolved in a solvent, graphene oxide was added and mixed, filtered, washed and dried to obtain the modified graphene oxide.

5. The fiber for a headscarf according to claim 4, characterized in that, The mixing temperature is 60~70℃, and the mixing time is 7~8h.

6. The fiber for a headscarf according to claim 4, characterized in that, The mass ratio of graphene oxide to solvent is 2~5:80; The solvent includes ethanol and / or methanol.

7. The fiber for a headscarf according to claim 1, characterized in that, The toughening agent includes maleic anhydride-grafted POE and / or polybutylene succinate.

8. The fiber for a headscarf according to claim 7, characterized in that, When the toughening agent comprises maleic anhydride-grafted POE and polybutylene succinate, the mass ratio of maleic anhydride-grafted POE to polybutylene succinate is 3:1~2.

9. The fiber for a headscarf according to claim 1, characterized in that, The antioxidants include one or more of antioxidants 1010, 1076, 3114, and 168.

10. A method for preparing a headband fiber, used to prepare the headband fiber according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. After mixing all components evenly, a premix is ​​obtained; S2. The premixed material is melt-blended and then extruded and granulated to obtain masterbatch. S3. After the masterbatch is melt-spun, it is cooled and shaped, and then hot-stretched to obtain the fiber for the headscarf.

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