Hydrophilic polyphenylene sulfide fiber and preparation method thereof

Abstract

The invention provides a hydrophilic polyphenylene sulfide fiber, which relates to the field of monofilaments and comprises a core layer made of polyphenylene sulfide and a hydrophilic film, the hydrophilic film covers the outer side of the core layer. The hydrophilic polyphenylene sulfide fiber provided by the invention can solve the problem that the application of the PPS on special protective clothing, industrial filter bags and membranes with specific purposes is limited due to poor hydrophilic performance of the PPS in the prior art, and realizes improvement of the hydrophilic performance of the PPS.

Description

Technical Field

[0001] The invention relates to the field of monofilaments, and in particular to a hydrophilic polyphenylene sulfide fiber and a preparation method thereof. Background Art

[0002] Polyphenylene sulfide (PPS) has good thermal stability, chemical stability, corrosion resistance and flame retardancy, and has good application prospects in environmental protection, automobiles and textiles.

[0003] Since PPS has thermal stability and flame retardancy, it can be used as a material for making special protective clothing such as flame retardant protective clothing; at the same time, PPS has chemical stability and corrosion resistance, and can be used as a material for making industrial filter bags; when using flame retardant protective clothing and industrial filter bags, they are usually required to be hydrophilic; the hydrophilicity of flame retardant protective clothing can improve the evaporation efficiency of water vapor and improve the wearing comfort in hot environments; the hydrophilicity of industrial filter bags can improve the filtrate flux and ensure high filtration efficiency;

[0004] However, the molecular chain of PPS does not contain polar groups, resulting in poor hydrophilicity, which limits its application in special protective clothing, industrial filter bags and membranes for specific purposes. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention provides a hydrophilic polyphenylene sulfide fiber, which can solve the problem that the hydrophilicity of PPS in the prior art is poor, resulting in its application in special protective clothing, industrial filter bags and special-purpose membranes being limited, thereby improving the hydrophilicity of PPS.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] The invention provides a hydrophilic polyphenylene sulfide fiber, comprising a core layer made of polyphenylene sulfide and a hydrophilic film; the hydrophilic film is coated on the outer side of the core layer.

[0008] The hydrophilic polyphenylene sulfide fiber provided by the present invention is preferably prepared from acrylic acid, methacrylic acid, hydroxyethyl methacrylate, butyl acrylate, a crosslinking agent and a photoinitiator; the ratio of the acrylic acid, the methacrylic acid, the hydroxyethyl methacrylate and the butyl acrylate is 3:3:3:1; the content of the crosslinking agent in the hydrophilic film is 10%; the content of the photoinitiator in the hydrophilic film is 5%.

[0009] In the hydrophilic polyphenylene sulfide fiber provided by the present invention, preferably, the crosslinking agent is N-isobutyloxymethyl acrylamide.

[0010] In the hydrophilic polyphenylene sulfide fiber provided by the present invention, preferably, the photoinitiator is photoinitiator 1173.

[0011] The present invention provides a method for preparing the hydrophilic polyphenylene sulfide fiber, comprising the following steps:

[0012] S101: Putting polyphenylene sulfide slices into a vacuum silo;

[0013] S102: placing the material in the vacuum silo into a rotary pot for rotation and heating;

[0014] S103: screw-melting the polyphenylene sulfide slices through a screw extruder to obtain a melt;

[0015] S104: The melt is ejected from the spinneret and cooled to form polyphenylene sulfide fibers;

[0016] S105: acrylic acid, methacrylic acid, hydroxyethyl methacrylate and butyl acrylate are prepared in a ratio of 3:3:3:1, and 10% of a cross-linking agent and 5% of a photoinitiator are added, and the mixture is shaken and mixed to prepare a hydrophilic film solution;

[0017] S106: spraying the hydrophilic membrane solution uniformly onto the surface of the polyphenylene sulfide fiber;

[0018] S107: placing the polyphenylene sulfide fiber with the hydrophilic film solution in a UV curing machine for curing, forming a hydrophilic film on the surface of the polyphenylene sulfide fiber, and obtaining a hydrophilic polyphenylene sulfide fiber.

[0019] In the method for preparing the hydrophilic polyphenylene sulfide fiber provided by the present invention, preferably, in the step S105, the crosslinking agent is N-isobutyloxymethyl acrylamide.

[0020] In the method for preparing the hydrophilic polyphenylene sulfide fiber provided by the present invention, preferably, in the step S105 , the photoinitiator is photoinitiator 1173 .

[0021] The above technical solution has the following advantages or beneficial effects:

[0022] The hydrophilic polyphenylene sulfide fiber provided by the present invention comprises a core layer and a hydrophilic film made of polyphenylene sulfide. Since the molecular chain of polyphenylene sulfide does not contain polar groups, its hydrophilic property is poor. When water flows through the surface of the polyphenylene sulfide fiber, it is not easily absorbed by the polyphenylene sulfide fiber. The hydrophilic film is covered on the surface of the polyphenylene sulfide. The hydrophilic film has good hydrophilic property and has a large number of molecules with polar groups on its surface. The polar groups have a large affinity for water and can attract water molecules. The hydrophilic film can absorb water molecules that originally easily flow through the surface of the polyphenylene sulfide fiber, thereby improving the hygroscopicity and air permeability of the polyphenylene sulfide fiber, thereby improving the water absorption capacity of the polyphenylene sulfide fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention and its features, configurations and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts throughout the drawings. The drawings are not drawn to scale, but rather to illustrate the subject matter of the present invention.

[0024] Figure 1 It is a flowchart of the method for preparing hydrophilic polyphenylene sulfide fiber provided in Example 2 of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0026] Embodiment 1:

[0027] A hydrophilic polyphenylene sulfide fiber provided in Example 1 of the present invention comprises a core layer made of polyphenylene sulfide and a hydrophilic film; the hydrophilic film is coated on the outer side of the core layer.

[0028] The hydrophilic polyphenylene sulfide fiber provided in Example 1 of the present invention includes a core layer and a hydrophilic film made of polyphenylene sulfide. Since the molecular chain of polyphenylene sulfide does not contain polar groups, its hydrophilic property is poor. When water flows through the surface of the polyphenylene sulfide fiber, it is not easily absorbed by the polyphenylene sulfide fiber. The hydrophilic film is covered on the surface of the polyphenylene sulfide. The hydrophilic film has good hydrophilic properties and has a large number of molecules with polar groups on its surface. The polar groups have a large affinity for water and can attract water molecules. The hydrophilic film can absorb water molecules that originally easily flow through the surface of the polyphenylene sulfide fiber, thereby improving the hygroscopicity and air permeability of the polyphenylene sulfide fiber, thereby improving the water absorption capacity of the polyphenylene sulfide fiber.

[0029] The hydrophilic polyphenylene sulfide fiber provided in Example 1 of the present invention is preferably made of acrylic acid, methacrylic acid, hydroxyethyl methacrylate, butyl acrylate, a crosslinking agent and a photoinitiator; acrylic acid and methacrylic acid provide free carboxyl groups, which are one of the polar groups and have good hydrophilic properties; hydroxyethyl methacrylate provides a polar functional group, which can undergo a crosslinking and curing reaction with acrylic acid or methacrylic acid to improve the adhesion of the hydrophilic film, and hydroxyethyl methacrylate has a polar functional group hydroxyl group, which can further improve the hydrophilic properties of the hydrophilic film; butyl acrylate is used as a diluent, and the use of hydroxyethyl methacrylate can improve the hydrophilic properties of the hydrophilic film. In the case of butyl acrylate, the prepared hydrophilic membrane solution will become sticky, easily contaminated by dust in the air, and have poor tolerance. After adding butyl acrylate, the viscosity of the hydrophilic membrane solution can be improved by taking advantage of the poor water solubility and large molecular weight of butyl acrylate, so that it can be sprayed on the surface of polyphenylene sulfide fiber during production and adhere to the polyphenylene sulfide fiber, while improving the tolerance of the hydrophilic membrane; a cross-linking agent is used to promote the cross-linking polymerization reaction of acrylic acid and methacrylic acid, and improve the adhesion of the hydrophilic membrane to the polyphenylene sulfide fiber; a photoinitiator is used to absorb energy and promote the polymerization, cross-linking and curing of acrylic acid, methacrylic acid and hydroxyethyl methacrylate;

[0030] Acrylic acid, methacrylic acid, hydroxyethyl methacrylate and butyl acrylate are configured in a ratio of 3:3:3:1. When the content of the crosslinker in the hydrophilic film is 10% and the content of the photoinitiator in the hydrophilic film is 5%, a hydrophilic film with the best hydrophilic effect can be obtained.

[0031] In the hydrophilic polyphenylene sulfide fiber provided in Example 1 of the present invention, preferably, the crosslinking agent is N-isobutyloxymethyl acrylamide, which can prevent adhesion and agglomeration on the surface of the hydrophilic film after curing, thereby improving the quality of the hydrophilic film.

[0032] In the hydrophilic polyphenylene sulfide fiber provided in Example 1 of the present invention, preferably, the photoinitiator is photoinitiator 1173, which can promote the polymerization, cross-linking and curing of acrylic acid, methacrylic acid and hydroxyethyl methacrylate.

[0033] Embodiment 2:

[0034] like Figure 1 As shown, a method for preparing the hydrophilic polyphenylene sulfide fiber in Example 1 provided in Example 2 of the present invention comprises the following steps:

[0035] S101: Putting polyphenylene sulfide slices into a vacuum silo;

[0036] S102: placing the material in the vacuum silo into a rotary pot for rotation and heating;

[0037] S103: screw-melting the polyphenylene sulfide slices through a screw extruder to obtain a melt;

[0038] S104: The melt is ejected from the spinneret and cooled to form polyphenylene sulfide fibers;

[0039] S105: acrylic acid, methacrylic acid, hydroxyethyl methacrylate and butyl acrylate are prepared in a ratio of 3:3:3:1, and 10% of a cross-linking agent and 5% of a photoinitiator are added, and the mixture is shaken and mixed to prepare a hydrophilic film solution;

[0040] S106: spraying the hydrophilic membrane solution uniformly onto the surface of the polyphenylene sulfide fiber;

[0041] S107: placing the polyphenylene sulfide fiber with the hydrophilic film solution in a UV curing machine for curing, forming a hydrophilic film on the surface of the polyphenylene sulfide fiber, and obtaining a hydrophilic polyphenylene sulfide fiber.

[0042] The preparation method for hydrophilic polyphenylene sulfide fiber provided in Example 2 of the present invention comprises the following steps: in steps S101 to S104, polyphenylene sulfide slices are screw melted, the melted melt is sprayed out from a spinneret, and the polyphenylene sulfide fiber is formed by cooling, and the polyphenylene sulfide fiber serves as the core layer of the hydrophilic polyphenylene sulfide fiber; in steps S105 to S107, a hydrophilic membrane solution is prepared in proportion, the hydrophilic membrane solution is evenly distributed on the surface of the polyphenylene sulfide fiber by spraying, and the polyphenylene sulfide fiber is irradiated with ultraviolet light by a UV curing machine, so that the hydrophilic membrane is cured and adhered to the surface of the polyphenylene sulfide fiber, thereby making the hydrophilic membrane coated on the surface of the core layer to obtain the hydrophilic polyphenylene sulfide fiber.

[0043] In the method for preparing hydrophilic polyphenylene sulfide fiber provided in Example 2 of the present invention, preferably, in step S105, the crosslinking agent is N-isobutyloxymethyl acrylamide, which is used to promote the crosslinking polymerization reaction of acrylic acid and methacrylic acid and improve the adhesion between the hydrophilic film and the polyphenylene sulfide fiber.

[0044] In the method for preparing hydrophilic polyphenylene sulfide fiber provided in Example 2 of the present invention, preferably, in step S105, the photoinitiator is photoinitiator 1173, which is used to promote the polymerization, cross-linking and curing of acrylic acid, methacrylic acid and hydroxyethyl methacrylate.

[0045] Embodiment 3:

[0046] The hydrophilic polyphenylene sulfide fiber as in Example 1 is prepared by the preparation method provided in Example 2, and the hydrophilic polyphenylene sulfide fiber is woven into a polyphenylene sulfide fabric;

[0047] The instantaneous water contact angle of the polyphenylene sulfide fabric is 5° to 15°, showing superhydrophilicity, and the water droplet is absorbed into the interior of the polyphenylene sulfide fabric within 5 seconds.

[0048] In summary, the hydrophilic polyphenylene sulfide fiber provided by the present invention can solve the problem that the prior art PPS has poor hydrophilicity, which leads to its limited application in special protective clothing, industrial filter bags and membranes for specific purposes, and improves the hydrophilicity of PPS.

[0049] Those skilled in the art should understand that those skilled in the art can implement the above-mentioned variations by combining the prior art and the above-mentioned embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present invention, and will not be described in detail here.

[0050] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A hydrophilic polyphenylene sulfide fiber, characterized in that: It comprises a core layer made of polyphenylene sulfide and a hydrophilic film; the hydrophilic film is coated on the outer side of the core layer.

2. The hydrophilic polyphenylene sulfide fiber according to claim 1, characterized in that The hydrophilic film is made of acrylic acid, methacrylic acid, hydroxyethyl methacrylate, butyl acrylate, a crosslinking agent and a photoinitiator; the ratio of the acrylic acid, the methacrylic acid, the hydroxyethyl methacrylate and the butyl acrylate is 3:3:3:1; the content of the crosslinking agent in the hydrophilic film is 10%; the content of the photoinitiator in the hydrophilic film is 5%.

3. The hydrophilic polyphenylene sulfide fiber according to claim 2, characterized in that: The cross-linking agent is N-isobutyloxymethyl acrylamide.

4. The hydrophilic polyphenylene sulfide fiber according to claim 2, characterized in that: The photoinitiator is photoinitiator 1173.

5. A method for preparing the hydrophilic polyphenylene sulfide fiber according to any one of claims 1 to 4, characterized in that: The following steps are involved: S101: Putting polyphenylene sulfide slices into a vacuum silo; S102: placing the material in the vacuum silo into a rotary pot for rotation and heating; S103: screw-melting the polyphenylene sulfide slices through a screw extruder to obtain a melt; S104: The melt is ejected from the spinneret and cooled to form polyphenylene sulfide fibers; S105: acrylic acid, methacrylic acid, hydroxyethyl methacrylate and butyl acrylate are prepared in a ratio of 3:3:3:1, and 10% of a cross-linking agent and 5% of a photoinitiator are added, and the mixture is shaken and mixed to prepare a hydrophilic film solution; S106: spraying the hydrophilic membrane solution uniformly onto the surface of the polyphenylene sulfide fiber; S107: placing the polyphenylene sulfide fiber with the hydrophilic film solution in a UV curing machine for curing, forming a hydrophilic film on the surface of the polyphenylene sulfide fiber, and obtaining a hydrophilic polyphenylene sulfide fiber.

6. The method for preparing the hydrophilic polyphenylene sulfide fiber according to claim 5, characterized in that: In the step S105, the cross-linking agent is N-isobutyloxymethyl acrylamide.

7. The method for preparing the hydrophilic polyphenylene sulfide fiber according to claim 5, characterized in that: In the step S105 , the photoinitiator is photoinitiator 1173 .

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