High-temperature-resistant polyester fiber and preparation process thereof

Abstract

The invention discloses a high-temperature-resistant polyester fiber and a preparation process thereof, and particularly relates to a high-temperature-resistant polyester fiber which comprises the following components in parts by weight: 100-150 parts of polyester chips, 10-30 parts of polyimide, 2-5 parts of maleic anhydride grafted polyolefin, 3-5 parts of a flame retardant and 4-8 parts of graphene. The method has the effect of improving the high temperature resistance of the polyester fiber.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic ink, and in particular to a high-temperature resistant polyester fiber and a preparation process thereof. Background Art

[0002] In modern industrial applications, the demand for high temperature resistant materials has increased significantly, mainly due to the increasingly stringent requirements for material performance stability and safety in extreme environments. The complexity and diversity of industrial processes have made it necessary for many applications to cope with high temperature challenges. These high temperature environments can include high temperature manufacturing processes, aerospace equipment, electronic devices, automotive engines and their components, chemical reactors, etc. In these applications, materials must not only be able to withstand high temperatures, but also maintain the stability of their physical, chemical and mechanical properties, which places extremely high demands on the high temperature resistance of the materials.

[0003] Traditional polyester fibers perform well at room temperature and slightly higher temperatures, and their excellent strength, wear resistance, and processability make them widely used in the textile and industrial fields. However, the performance of polyester fibers will drop significantly under extremely high temperature conditions. This is because the melting point of polyester is relatively low (about 250°C), and in high temperature environments, polyester fibers may undergo changes in physical and chemical properties, such as thermal degradation, reduced strength, and structural deformation. These changes not only affect the service life of the material, but may also cause safety hazards, especially in industrial applications that require high reliability.

[0004] In order to meet these challenges, the development of polyester fibers with superior high temperature resistance has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a high temperature resistant polyester fiber and a preparation process thereof.

[0006] The above object of the present invention is achieved through the following technical solutions: A high temperature resistant polyester fiber, comprising the following components in parts by weight: Polyester chips 100-150 pieces; Polyimide 10-30 parts; Maleic anhydride grafted polyolefin 2-5 parts; 3-5 parts of flame retardant; 4-8 parts of graphene.

[0007] As a high-temperature resistant material, polyimide has excellent thermal stability, which can ensure that the fiber remains stable in a high-temperature environment. The addition of polyimide significantly improves the high-temperature resistance of the fiber, enabling it to maintain good physical and chemical properties under extreme temperature conditions. The addition of graphene further enhances the fiber's ability to withstand high temperatures. Graphene not only has excellent thermal conductivity, but also provides additional strength and stability. This enables polyester fibers to maintain good structural strength and performance stability under high temperature conditions. In addition, the high thermal conductivity of graphene also helps to disperse and conduct heat, thereby improving the thermal management capabilities of the fiber. Graphene is used in combination with traditional flame retardants (such as nitrogen and phosphorus flame retardants). Graphene forms a heat-insulating layer in the polyester matrix, which can delay the combustion process of the material at high temperatures and enhance the effect of the flame retardant. The thermal barrier effect of graphene can reduce the conduction of heat to the surface of the material, delaying the decomposition and combustion of the material. Graphene is evenly distributed in the polyester matrix, forming a nanocomposite material with a "brick wall" structure. This structure can form a thermal barrier layer on the surface of the material, effectively improving the high-temperature resistance and flame retardancy of polyester.

[0008] Furthermore, the flame retardant is selected from one or more of nitrogen, phosphorus, and silicon polymer flame retardants.

[0009] Furthermore, it also includes 1-3 parts by weight of nano silicon dioxide.

[0010] Furthermore, the graphene is first pre-treated with nano-silicon dioxide for assembly, and the assembly pre-treatment agent is chitosan.

[0011] Furthermore, the graphene is first pre-assembled with nano-silicon dioxide to obtain pre-assembled particles, and the pre-assembled particles include the following steps: A1: Mix graphene and nano-silicon dioxide in water by ultrasonic dispersion; A2: dissolving chitosan in 1% to 3% by mass acetic acid solution to obtain a chitosan solution; A3: Add the graphene dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0012] Through assembly pretreatment, graphene and nano-silica can form uniform composite particles. Ultrasonic dispersion and the action of chitosan help to avoid the aggregation or precipitation of graphene and nano-silica, ensuring the uniform distribution of the two in the matrix. During the pretreatment process, chitosan helps to improve the interface bonding between graphene and nano-silica. Uniformly distributed chitosan can enhance the bonding force between the composite particles and the matrix, and improve the mechanical strength and stability of the material. This good interface bonding can reduce interface defects and material weaknesses, and improve the comprehensive performance of the composite material. By combining graphene with nano-silica to form a multiphase nanocomposite material, the characteristics of different nanofillers are used to synergistically improve the thermal stability, flame retardancy and mechanical properties of the composite material.

[0013] Furthermore, the inherent viscosity of the polyester chips is 0.69 dL / g.

[0014] Furthermore, the molecular weight distribution of the polyester chips is controlled to be 1.8.

[0015] Furthermore, the molecular weight of the polyimide is controlled to be 5-80000 g / mol.

[0016] Furthermore, it also includes 3-4 parts by weight of carbon nanotubes.

[0017] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The high-temperature resistant polyester fiber solution significantly improves the performance of the fiber through material combination and processing technology. The addition of polyimide significantly improves the high-temperature resistance of the fiber, ensuring stability at extreme temperatures. The addition of graphene not only enhances the high-temperature resistance, but also improves the thermal management performance through excellent thermal conductivity, while providing additional strength and stability. In terms of flame retardant performance, the combination of graphene with nitrogen, phosphorus, and silicon flame retardants forms an effective thermal insulation layer, delays the combustion process of the material, and reduces the release of harmful gases. The assembly pretreatment of graphene and nano-silicon dioxide forms uniform composite particles with the help of chitosan, optimizing the thermal stability, flame retardancy and mechanical properties of the composite material. The twin-screw extruder and melt spinning process ensure the uniform mixing of raw materials and the consistency of fibers. The inherent viscosity and molecular weight distribution of polyester chips are precisely controlled, further improving the processing performance of the material. Overall, through material optimization and process improvement, the solution makes the high-temperature resistant polyester fiber perform better in high-temperature environments, and is suitable for applications that require high temperature resistance and high safety. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with embodiments.

[0020] Embodiment 1, a high temperature resistant polyester fiber, comprising the following components in parts by weight: Polyester chips 100 pieces; 10 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 4 parts.

[0021] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0022] The inherent viscosity of polyester chips is 0.69 dL / g.

[0023] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0024] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0025] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0026] Embodiment 2, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 5 parts of maleic anhydride grafted polyolefin; 5 parts of flame retardant; 8 parts of graphene.

[0027] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0028] The inherent viscosity of polyester chips is 0.69 dL / g.

[0029] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0030] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0031] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0032] Embodiment 3, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 130 pieces of polyester chips; Polyimide 20 parts; 4 parts of maleic anhydride grafted polyolefin; 4 parts of flame retardant; 6 parts of graphene.

[0033] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0034] The inherent viscosity of polyester chips is 0.69 dL / g.

[0035] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0036] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0037] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0038] Embodiment 4, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 140 pieces of polyester chips; Polyimide 20 parts; 3 parts of maleic anhydride grafted polyolefin; 5 parts of flame retardant; 8 parts of graphene.

[0039] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0040] The inherent viscosity of polyester chips is 0.69 dL / g.

[0041] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0042] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0043] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0044] Embodiment 5, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts.

[0045] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0046] The inherent viscosity of polyester chips is 0.69 dL / g.

[0047] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0048] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0049] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0050] Embodiment 6, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 1 part of nano silicon dioxide.

[0051] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0052] The inherent viscosity of polyester chips is 0.69 dL / g.

[0053] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0054] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0055] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0056] Embodiment 7, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 3 parts of nano silicon dioxide.

[0057] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0058] The inherent viscosity of polyester chips is 0.69 dL / g.

[0059] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0060] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0061] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0062] Embodiment 8, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2 parts of nano silicon dioxide.

[0063] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0064] The inherent viscosity of polyester chips is 0.69 dL / g.

[0065] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0066] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0067] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0068] Embodiment 9, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 1.5 parts of nano silicon dioxide.

[0069] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0070] The inherent viscosity of polyester chips is 0.69 dL / g.

[0071] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0072] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0073] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0074] Embodiment 10, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide.

[0075] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0076] The inherent viscosity of polyester chips is 0.69 dL / g.

[0077] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0078] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0079] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0080] Embodiment 11, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide.

[0081] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0082] The inherent viscosity of polyester chips is 0.69 dL / g.

[0083] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0084] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0085] Graphene and nano-silicon dioxide are first pre-assembled to obtain pre-assembled particles. The pre-assembly process includes the following steps: A1: Graphene and nano-silicon dioxide are uniformly mixed in water by ultrasonic dispersion to obtain a dispersion; the ratio of the total mass of graphene and nano-silicon dioxide to water is 1:100; A2: dissolving chitosan in 1% by mass acetic acid solution to obtain a chitosan solution; A3: Add the dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; the mass ratio of the dispersion to the chitosan solution is 1:5; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0086] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0087] Embodiment 12, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide.

[0088] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0089] The inherent viscosity of polyester chips is 0.69 dL / g.

[0090] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0091] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0092] Graphene and nano-silicon dioxide are first pre-assembled to obtain pre-assembled particles. The pre-assembly process includes the following steps: A1: Graphene and nano-silicon dioxide are uniformly mixed in water by ultrasonic dispersion to obtain a dispersion; the ratio of the total mass of graphene and nano-silicon dioxide to water is 1:100; A2: dissolving chitosan in 3% by mass acetic acid solution to obtain a chitosan solution; A3: Add the dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; the mass ratio of the dispersion to the chitosan solution is 1:5; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0093] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0094] Embodiment 13, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide.

[0095] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0096] The inherent viscosity of polyester chips is 0.69 dL / g.

[0097] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0098] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0099] Graphene and nano-silicon dioxide are first pre-assembled to obtain pre-assembled particles. The pre-assembly process includes the following steps: A1: Graphene and nano-silicon dioxide are uniformly mixed in water by ultrasonic dispersion to obtain a dispersion; the ratio of the total mass of graphene and nano-silicon dioxide to water is 1:100; A2: dissolving chitosan in 2% by mass acetic acid solution to obtain a chitosan solution; A3: Add the dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; the mass ratio of the dispersion to the chitosan solution is 1:5; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0100] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0101] Embodiment 14, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide.

[0102] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0103] The inherent viscosity of polyester chips is 0.69 dL / g.

[0104] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0105] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0106] Graphene and nano-silicon dioxide are first pre-assembled to obtain pre-assembled particles. The pre-assembly process includes the following steps: A1: Graphene and nano-silicon dioxide are uniformly mixed in water by ultrasonic dispersion to obtain a dispersion; the ratio of the total mass of graphene and nano-silicon dioxide to water is 1:100; A2: dissolving chitosan in 1.5% by mass acetic acid solution to obtain a chitosan solution; A3: Add the dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; the mass ratio of the dispersion to the chitosan solution is 1:5; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0107] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0108] Embodiment 15, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide.

[0109] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0110] The inherent viscosity of polyester chips is 0.69 dL / g.

[0111] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0112] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0113] Graphene and nano-silicon dioxide are first pre-assembled to obtain pre-assembled particles. The pre-assembly process includes the following steps: A1: Graphene and nano-silicon dioxide are uniformly mixed in water by ultrasonic dispersion to obtain a dispersion; the ratio of the total mass of graphene and nano-silicon dioxide to water is 1:100; A2: dissolving chitosan in 2.5% by mass acetic acid solution to obtain a chitosan solution; A3: Add the dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; the mass ratio of the dispersion to the chitosan solution is 1:5; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0114] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0115] Embodiment 16, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide; 3-4 parts of carbon nanotubes.

[0116] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0117] The inherent viscosity of polyester chips is 0.69 dL / g.

[0118] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0119] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0120] Graphene and nano-silicon dioxide are first pre-assembled to obtain pre-assembled particles. The pre-assembly process includes the following steps: A1: Graphene and nano-silicon dioxide are uniformly mixed in water by ultrasonic dispersion to obtain a dispersion; the ratio of the total mass of graphene and nano-silicon dioxide to water is 1:100; A2: dissolving chitosan in 2.5% by mass acetic acid solution to obtain a chitosan solution; A3: Add the dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; the mass ratio of the dispersion to the chitosan solution is 1:5; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0121] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0122] Embodiment 17, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide; 3-4 parts of carbon nanotubes.

[0123] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0124] The inherent viscosity of polyester chips is 0.69 dL / g.

[0125] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0126] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0127] Graphene and nano-silicon dioxide are first pre-assembled to obtain pre-assembled particles. The pre-assembly process includes the following steps: A1: Graphene and nano-silicon dioxide are uniformly mixed in water by ultrasonic dispersion to obtain a dispersion; the ratio of the total mass of graphene and nano-silicon dioxide to water is 1:100; A2: dissolving chitosan in 2.5% by mass acetic acid solution to obtain a chitosan solution; A3: Add the dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; the mass ratio of the dispersion to the chitosan solution is 1:5; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0128] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0129] Embodiment 18, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide; 3-4 parts of carbon nanotubes.

[0130] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0131] The inherent viscosity of polyester chips is 0.69 dL / g.

[0132] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0133] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0134] Graphene and nano-silicon dioxide are first pre-assembled to obtain pre-assembled particles. The pre-assembly process includes the following steps: A1: Graphene and nano-silicon dioxide are uniformly mixed in water by ultrasonic dispersion to obtain a dispersion; the ratio of the total mass of graphene and nano-silicon dioxide to water is 1:100; A2: dissolving chitosan in 2.5% by mass acetic acid solution to obtain a chitosan solution; A3: Add the dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; the mass ratio of the dispersion to the chitosan solution is 1:5; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0135] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0136] Embodiment 19, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide; 3-4 parts of carbon nanotubes.

[0137] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0138] The inherent viscosity of polyester chips is 0.69 dL / g.

[0139] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0140] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0141] Graphene and nano-silicon dioxide are first pre-assembled to obtain pre-assembled particles. The pre-assembly process includes the following steps: A1: Graphene and nano-silicon dioxide are uniformly mixed in water by ultrasonic dispersion to obtain a dispersion; the ratio of the total mass of graphene and nano-silicon dioxide to water is 1:100; A2: dissolving chitosan in 2.5% by mass acetic acid solution to obtain a chitosan solution; A3: Add the dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; the mass ratio of the dispersion to the chitosan solution is 1:5; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0142] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0143] Embodiment 20, a high temperature resistant polyester fiber, comprising the following components in parts by weight: 150 pieces of polyester chips; 30 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; 3 parts of flame retardant; Graphene 7 parts; 2.5 parts of nano silicon dioxide; 3-4 parts of carbon nanotubes.

[0144] The flame retardant is a nitrogen-phosphorus polymer flame retardant.

[0145] The inherent viscosity of polyester chips is 0.69 dL / g.

[0146] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0147] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0148] Graphene and nano-silicon dioxide are first pre-assembled to obtain pre-assembled particles. The pre-assembly process includes the following steps: A1: Graphene and nano-silicon dioxide are uniformly mixed in water by ultrasonic dispersion to obtain a dispersion; the ratio of the total mass of graphene and nano-silicon dioxide to water is 1:100; A2: dissolving chitosan in 2.5% by mass acetic acid solution to obtain a chitosan solution; A3: Add the dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; the mass ratio of the dispersion to the chitosan solution is 1:5; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

[0149] A method for preparing high temperature resistant polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0150] Comparative Example 1: A polyester fiber comprising the following components in parts by weight: Polyester chips 100 pieces; 10 parts of polyimide; 2 parts of maleic anhydride grafted polyolefin; The inherent viscosity of polyester chips is 0.69 dL / g.

[0151] The molecular weight distribution of the polyester chips is controlled to be 1.8.

[0152] The molecular weight of the polyimide was controlled to be 80000 g / mol.

[0153] A method for preparing polyester fiber comprises the following steps: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: Add the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.

[0154] High temperature resistance test: The thermogravimetric properties of polyester fiber were tested by thermogravimetric analyzer with sample size of 5 mm × 2 mm × 1 mm, heating rate of 20 °C / min, from room temperature to 800 °C, nitrogen atmosphere, flow rate of 40 mL / min. T5% is the temperature at which 5% of mass decomposition occurs, and T50% is the temperature at which 50% of mass decomposition occurs.

[0155] Table 1 Example <![CDATA[T 5% (℃)]]> <![CDATA[T 50% (℃)]]> Mass residual rate (%) Example 1 401.3 449.2 13.2 Example 2 402.1 449.5 12.8 Example 3 402.3 449.3 12.9 Example 4 401.9 449.4 13.1 Example 5 401.8 450.2 13.3 Example 6 405.3 453.3 14.3 Example 7 406.7 453.2 14.6 Example 8 405.4 452.7 15.2 Example 9 405.8 453.1 14.5 Example 10 406.1 452.9 15.1 Embodiment 11 417.2 458.3 17.3 Example 12 417.7 459.2 17.2 Embodiment 13 417.5 459.1 16.8 Embodiment 14 417.3 458.6 17.4 Embodiment 15 418.6 458.9 17.1 Example 16 421.2 461.3 18.9 Embodiment 17 423.3 462.2 18.6 Embodiment 18 422.5 462.5 19.2 Embodiment 19 422.1 461.8 19.1 Embodiment 20 423.7 467.3 18.5 Comparative Example 1 376.5 437.8 9.6 Conclusion: The above test results show that the high temperature resistant polyester fiber prepared by the present invention has excellent high temperature resistance.

[0156] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A high temperature resistant polyester fiber, characterized in that: The composition comprises the following components in parts by weight: Polyester chips 100-150 pieces; Polyimide 10-30 parts; Maleic anhydride grafted polyolefin 2-5 parts; 3-5 parts of flame retardant; Graphene 4-8 parts.

2. The high temperature resistant polyester fiber according to claim 1, characterized in that: The flame retardant is selected from one or more of nitrogen, phosphorus and silicon polymer flame retardants.

3. The high temperature resistant polyester fiber according to claim 2, characterized in that: The invention also comprises 1-3 parts by weight of nano silicon dioxide.

4. The high temperature resistant polyester fiber according to claim 3, characterized in that: The graphene is first pre-treated with nano-silicon dioxide, and the pre-treatment agent is chitosan.

5. The high temperature resistant polyester fiber according to claim 4, characterized in that: The graphene is first pre-assembled with nano-silicon dioxide to obtain pre-assembled particles, and the pre-assembled particles include the following steps: A1: Mix graphene and nano-silicon dioxide in water by ultrasonic dispersion; A2: dissolving chitosan in 1% to 3% by mass acetic acid solution to obtain a chitosan solution; A3: Add the graphene dispersion into the chitosan solution while stirring continuously to ensure that the graphene is evenly dispersed in the chitosan matrix; A4: Add dropwise a solution containing 5 mg / ml sodium tripolyphosphate to the mixed solution to obtain assembled pre-treated particles.

6. The high temperature resistant polyester fiber according to claim 1, characterized in that: The inherent viscosity of the polyester chips is 0.69 dL / g.

7. The high temperature resistant polyester fiber according to claim 1, characterized in that: The molecular weight distribution of the polyester chips is controlled to be 1.

8.

8. The high temperature resistant polyester fiber according to claim 1, characterized in that: The molecular weight of the polyimide is controlled to be 5-80000 g / mol.

9. The high temperature resistant polyester fiber according to claim 1, characterized in that: The invention also comprises 3-4 parts by weight of carbon nanotubes.

10. A method for preparing a high temperature resistant polyester fiber according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Mix the raw material components according to proportion and add them into a twin-screw extruder for blending and extrusion to obtain high temperature resistant particles; S2: adding the high temperature resistant particles into a spinning machine for melt spinning to obtain high temperature resistant polyester fibers.