CN112376126A - Preparation method of ultrahigh molecular weight polyethylene modified fiber - Google Patents
Preparation method of ultrahigh molecular weight polyethylene modified fiber Download PDFInfo
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- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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- C08J3/246—Intercrosslinking of at least two polymers
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- C08J3/00—Processes of treating or compounding macromolecular substances
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- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
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- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
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- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C08K7/00—Use of ingredients characterised by shape
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- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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Abstract
The invention discloses a preparation method of an ultrahigh molecular weight polyethylene modified fiber; s1, carrying out thermal dissolution on the ultra-high molecular weight polyethylene, and adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene; s3, carrying out radiation crosslinking on the mixed ultrahigh molecular weight polyethylene hot melt in the S2; s4, performing gel spinning on the cooled and cooled ultrahigh molecular weight polyethylene again; s5, extruding the ultra-high molecular weight polyethylene solution through a spinneret orifice, and solidifying the ultra-high molecular weight polyethylene solution into gel precursor; according to the invention, the plant fiber, the silicon dioxide and the glass fiber are added into the ultra-high molecular weight polyethylene, so that the toughness of the ultra-high molecular weight polyethylene is changed, the transparency, the strength and the rigidity are effectively improved, and the modification of the form stability, the creep resistance, the environmental stress cracking resistance and the like of the ultra-high molecular weight polyethylene is realized by a radiation crosslinking method.
Description
Technical Field
The invention belongs to the technical field of ultra-high molecular weight polyethylene, and particularly relates to a preparation method of ultra-high molecular weight polyethylene modified fiber.
Background
Ultra-high molecular weight polyethylene is unbranched linear polyethylene having a molecular weight of 150 ten thousand or more. The molecular formula is as follows: -CH 2-CH 2-: 0.920-0.964 g/cm 3. The heat distortion temperature (0.46MPa) is 85 ℃, the melting point is 130-136 ℃, and the molecular chain of the ultra-high molecular weight polyethylene mainly comprises methylene, has no branched chain and double bonds and is in a linear structure. The ultra-high molecular weight polyethylene has the advantages of impact resistance, high strength, self-lubricating property, wear resistance and the like compared with other engineering plastics, and the wear resistance of the ultra-high molecular weight polyethylene is at the head of the plastics and greatly exceeds that of the common polyethylene, but the ultra-high molecular weight polyethylene has the defects of low surface hardness and thermal deformation temperature, poor bending strength and poor creep property and the like. This is due to the molecular structure and molecular aggregation morphology of ultra high molecular weight polyethylene (UHMW-PE), however, there are still various problems with the various ultra high molecular weight polyethylenes on the market.
Although the preparation method of the ultra-high molecular weight polyethylene modified fiber disclosed in the publication No. CN107721199A is improved aiming at the technical problems of poor plasticity, poor wear resistance, easy corrosion and short service life of the existing glass fiber, the ultra-high molecular weight polyethylene and the glass fiber are modified, the ultra-high molecular weight polyethylene modified fiber product prepared by adopting the scheme has the characteristics of high temperature resistance, good plasticity, wear resistance and long service life, but the problems of low surface toughness and thermal deformation temperature, poor bending strength and poor creep property of the existing ultra-high molecular weight polyethylene are not solved, and the preparation method of the ultra-high molecular weight polyethylene modified fiber is provided for the people.
Disclosure of Invention
The invention aims to provide a preparation method of an ultrahigh molecular weight polyethylene modified fiber, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of ultrahigh molecular weight polyethylene modified fiber comprises the following steps:
s1, carrying out thermal dissolution on the ultra-high molecular weight polyethylene, and adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene: placing ultra-high molecular weight polyethylene in a hot-melting reaction kettle, controlling the temperature of the hot-melting reaction kettle to be 150-160 ℃, and then adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene;
s2, stirring the molten liquid in the S1, and then adding plant fibers: stirring the hot melt of the ultra-high molecular weight polyethylene by a stirring device on the hot melt reaction kettle, adding plant fibers into the hot melt of the ultra-high molecular weight polyethylene after stirring, and then mixing and stirring;
s3, carrying out radiation crosslinking on the mixed ultrahigh molecular weight polyethylene hot melt in the S2: after the ultra-high molecular weight polyethylene hot melt liquid in the S2 is stirred, carrying out radiation crosslinking on the ultra-high molecular weight polyethylene hot melt liquid for 1-2h, and then cooling the ultra-high molecular weight polyethylene hot melt liquid after the radiation crosslinking;
s4, carrying out gel spinning on the cooled and cooled ultrahigh molecular weight polyethylene again: placing the cooled and cooled ultrahigh molecular weight polyethylene in a decalin solvent, and stirring and dissolving at 150-160 ℃ to obtain an ultrahigh molecular weight polyethylene solution for later use;
s5, extruding the ultra-high molecular weight polyethylene solution through a spinneret orifice, and solidifying the ultra-high molecular weight polyethylene solution into gel precursor: and extruding the ultra-high molecular weight polyethylene solution prepared in the step S4 through a spinneret orifice, and quenching the spinning solution through cooling water when the ultra-high molecular weight polyethylene solution is sprayed out from the spinneret orifice to obtain the gel precursor.
Preferably, the diameters of the silica and the glass fiber in the S1 are kept between 0.2nm and 0.5nm, the mass percent of the silica is between 8 and 14 percent, and the mass percent of the glass fiber is between 7 and 12 percent.
Preferably, the stirring speed of the stirring device in S2 is 300r/min-600r/min, and the stirring time of the stirring device is accompanied with the whole mixing process.
Preferably, the plant fiber in the S2 is bamboo charcoal plant fiber, and the diameter of the bamboo charcoal plant fiber is 0.1nm-0.4 nm.
Preferably, the radiation crosslinking in S3 is performed by electron rays or gamma rays.
Preferably, the cooling in S3 is natural cooling, and the ultra-high molecular weight polyethylene is placed in a sealed environment during the natural cooling, and the cooling time is 1-2 days.
Preferably, an antifreezing agent, a lubricant, a flame retardant and a nucleating agent are added into the ultra-high molecular weight polyethylene solution in the S4, wherein the antifreezing agent is ethylene glycol, the lubricant is molybdenum disulfide or silicone oil, the flame retardant is triethyl phosphate, and the nucleating agent is kaolin or titanium dioxide.
Preferably, the ultrahigh molecular weight polyethylene solution is subjected to acid washing before extrusion of the spinneret orifice in the S5, the acid washing treatment is performed by using a hydrochloric acid solution with a mass concentration of 4% -8%, and then the glass fiber is subjected to distilled water washing.
Preferably, the temperature of the cooling water in the S5 is 4 ℃ to 10 ℃, the cooling water is recycled by a water pump, and the cooling water is placed in a cooling water tank with a length of 2m to quench the spinning solution.
Preferably, a pressure gauge, a thermometer, a feed inlet and a pressure relief opening are fixedly arranged on the hot melting reaction kettle in the S1, and the pressure gauge is used for carrying out pressure relief treatment through the pressure relief opening when detecting that the pressure is too high.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the surface toughness of the ultra-high molecular weight polyethylene is changed by adding the plant fiber into the ultra-high molecular weight polyethylene, so that the frangibility characteristic of the ultra-high molecular weight polyethylene can be effectively improved, the transparency, the strength and the rigidity of the ultra-high molecular weight polyethylene are effectively improved by adding the silicon dioxide and the glass fiber into the ultra-high molecular weight polyethylene, and the morphological stability, the creep resistance, the environmental stress cracking resistance and the like of the ultra-high molecular weight polyethylene are modified by a radiation crosslinking method.
Drawings
FIG. 1 is a schematic flow chart of the steps of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
the first embodiment is as follows:
a preparation method of ultrahigh molecular weight polyethylene modified fiber comprises the following steps:
s1, carrying out thermal dissolution on the ultra-high molecular weight polyethylene, and adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene: placing ultra-high molecular weight polyethylene in a hot-melting reaction kettle, controlling the temperature of the hot-melting reaction kettle at 150 ℃, and then adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene;
s2, stirring the molten liquid in the S1, and then adding plant fibers: stirring the hot melt of the ultra-high molecular weight polyethylene by a stirring device on the hot melt reaction kettle, adding plant fibers into the hot melt of the ultra-high molecular weight polyethylene after stirring, and then mixing and stirring;
s3, carrying out radiation crosslinking on the mixed ultrahigh molecular weight polyethylene hot melt in the S2: after the ultra-high molecular weight polyethylene hot melt liquid in the S2 is stirred, carrying out radiation crosslinking on the ultra-high molecular weight polyethylene hot melt liquid for 1h, and then cooling the ultra-high molecular weight polyethylene hot melt liquid after the radiation crosslinking;
s4, carrying out gel spinning on the cooled and cooled ultrahigh molecular weight polyethylene again: placing the cooled and cooled ultrahigh molecular weight polyethylene in a solvent decalin, and stirring and dissolving at 150 ℃ to obtain an ultrahigh molecular weight polyethylene solution for later use;
s5, extruding the ultra-high molecular weight polyethylene solution through a spinneret orifice, and solidifying the ultra-high molecular weight polyethylene solution into gel precursor: and extruding the ultra-high molecular weight polyethylene solution prepared in the step S4 through a spinneret orifice, and quenching the spinning solution through cooling water when the ultra-high molecular weight polyethylene solution is sprayed out from the spinneret orifice to obtain the gel precursor.
In order to enable the silica and the glass fiber to be sufficiently mixed and dissolved in the ultra-high molecular weight polyethylene to modify the ultra-high molecular weight polyethylene, in this embodiment, it is preferable that the diameters of the silica and the glass fiber in S1 be maintained at 0.2nm, the mass percentage of the silica be 8%, and the mass percentage of the glass fiber be 7%.
In order to perform sufficient mixing and stirring on the ultra-high molecular weight polyethylene, and because the viscosity of the ultra-high molecular weight polyethylene is high, the stirring speed is slow, in this embodiment, it is preferable that the stirring speed of the stirring device in S2 is 300r/min, and the stirring time of the stirring device accompanies the whole mixing process.
In order to modify the toughness of the ultra-high molecular weight polyethylene so that the toughness of the ultra-high molecular weight polyethylene is relatively strong, in this embodiment, it is preferable that the plant fiber in S2 is a bamboo charcoal plant fiber, and the diameter of the bamboo charcoal plant fiber is 0.1 nm.
In order to realize that a part of the main chain or the side chain in the molecular structure of the ultra-high molecular weight polyethylene is cut by the radiation to generate a certain number of free radicals, and the free radicals are combined with each other to form a cross-linked chain, so that the linear molecular structure of the ultra-high molecular weight polyethylene is converted into a net-shaped macromolecular structure, in this embodiment, it is preferable that the radiation cross-linking in S3 is an electron ray or a gamma ray.
In order to prevent radiation from emitting and to sufficiently cool the ultra-high molecular weight polyethylene, in this embodiment, it is preferable that the cooling in S3 is natural cooling, and the ultra-high molecular weight polyethylene is placed in a sealed environment during the natural cooling, and the cooling time is 1 day.
In order to increase the stability of the ultra-high molecular weight polyethylene in the gel precursor and facilitate implementation, in this embodiment, it is preferable that an antifreeze, a lubricant, a flame retardant and a nucleating agent are added to the ultra-high molecular weight polyethylene solution in S4, the antifreeze is ethylene glycol, the lubricant is molybdenum disulfide or silicone oil, the flame retardant is triethyl phosphate, and the nucleating agent is kaolin or titanium dioxide.
In order to remove the impurities in the ultra-high molecular weight polyethylene and prevent the impurities from affecting the characteristics of the ultra-high molecular weight polyethylene, in this embodiment, it is preferable that the acid washing is performed on the ultra-high molecular weight polyethylene solution before the extrusion of the spinneret orifice in S5, the acid washing is performed through a hydrochloric acid solution with a mass concentration of 4%, and then the glass fiber is subjected to distilled water washing.
In order to sufficiently cool the gel precursor of the ultra-high molecular weight polyethylene and recycle resources, in this embodiment, it is preferable that the temperature of the cooling water in S5 is 4 ℃, the cooling water is recycled by a water pump, and the cooling water is placed in a cooling water tank with a length of 2m to quench the spinning solution.
In order to protect the safety of the mixing process of the ultra-high molecular weight polyethylene and facilitate the operation, in this embodiment, preferably, a pressure gauge, a thermometer, a feed inlet and a pressure relief opening are fixed on the hot-melt reaction kettle in the step S1, and the pressure gauge performs pressure relief processing through the pressure relief opening when detecting that the pressure is too high.
Example two:
a preparation method of ultrahigh molecular weight polyethylene modified fiber comprises the following steps:
s1, carrying out thermal dissolution on the ultra-high molecular weight polyethylene, and adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene: placing the ultra-high molecular weight polyethylene in a hot-melting reaction kettle, controlling the temperature of the hot-melting reaction kettle at 160 ℃, and then adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene;
s2, stirring the molten liquid in the S1, and then adding plant fibers: stirring the hot melt of the ultra-high molecular weight polyethylene by a stirring device on the hot melt reaction kettle, adding plant fibers into the hot melt of the ultra-high molecular weight polyethylene after stirring, and then mixing and stirring;
s3, carrying out radiation crosslinking on the mixed ultrahigh molecular weight polyethylene hot melt in the S2: after the ultra-high molecular weight polyethylene hot melt liquid in the S2 is stirred, carrying out radiation crosslinking on the ultra-high molecular weight polyethylene hot melt liquid for 2 hours, and then cooling the ultra-high molecular weight polyethylene hot melt liquid after the radiation crosslinking;
s4, carrying out gel spinning on the cooled and cooled ultrahigh molecular weight polyethylene again: placing the cooled and cooled ultrahigh molecular weight polyethylene in a decalin solvent, and stirring and dissolving at 160 ℃ to obtain an ultrahigh molecular weight polyethylene solution for later use;
s5, extruding the ultra-high molecular weight polyethylene solution through a spinneret orifice, and solidifying the ultra-high molecular weight polyethylene solution into gel precursor: and extruding the ultra-high molecular weight polyethylene solution prepared in the step S4 through a spinneret orifice, and quenching the spinning solution through cooling water when the ultra-high molecular weight polyethylene solution is sprayed out from the spinneret orifice to obtain the gel precursor.
In order to enable the silica and the glass fiber to be sufficiently mixed and dissolved in the ultra-high molecular weight polyethylene to modify the ultra-high molecular weight polyethylene, in this embodiment, it is preferable that the diameters of the silica and the glass fiber in S1 be maintained at 0.5nm, the mass percentage of the silica be 14%, and the mass percentage of the glass fiber be 12%.
In order to perform sufficient mixing and stirring on the ultra-high molecular weight polyethylene, and because the viscosity of the ultra-high molecular weight polyethylene is high, the stirring speed is slow, in this embodiment, it is preferable that the stirring speed of the stirring device in S2 is 600r/min, and the stirring time of the stirring device accompanies the whole mixing process.
In order to modify the toughness of the ultra-high molecular weight polyethylene so that the toughness of the ultra-high molecular weight polyethylene is relatively strong, in this embodiment, it is preferable that the plant fiber in S2 is a bamboo charcoal plant fiber, and the diameter of the bamboo charcoal plant fiber is 0.4 nm.
In order to realize that a part of the main chain or the side chain in the molecular structure of the ultra-high molecular weight polyethylene is cut by the radiation to generate a certain number of free radicals, and the free radicals are combined with each other to form a cross-linked chain, so that the linear molecular structure of the ultra-high molecular weight polyethylene is converted into a net-shaped macromolecular structure, in this embodiment, it is preferable that the radiation cross-linking in S3 is an electron ray or a gamma ray.
In order to prevent radiation from emitting and to sufficiently cool the ultra-high molecular weight polyethylene, in this embodiment, it is preferable that the cooling in S3 is natural cooling, and the ultra-high molecular weight polyethylene is placed in a sealed environment during the natural cooling, and the cooling time is 2 days.
In order to increase the stability of the ultra-high molecular weight polyethylene in the gel precursor and facilitate implementation, in this embodiment, it is preferable that an antifreeze, a lubricant, a flame retardant and a nucleating agent are added to the ultra-high molecular weight polyethylene solution in S4, the antifreeze is ethylene glycol, the lubricant is molybdenum disulfide or silicone oil, the flame retardant is triethyl phosphate, and the nucleating agent is kaolin or titanium dioxide.
In order to remove the impurities in the ultra-high molecular weight polyethylene and prevent the impurities from affecting the characteristics of the ultra-high molecular weight polyethylene, in this embodiment, it is preferable that the acid washing is performed on the ultra-high molecular weight polyethylene solution before the extrusion of the spinneret orifice in S5, the acid washing is performed through a hydrochloric acid solution with a mass concentration of 8%, and then the glass fiber is subjected to distilled water washing.
In order to sufficiently cool the gel precursor of the ultra-high molecular weight polyethylene and recycle resources, in this embodiment, it is preferable that the temperature of the cooling water in S5 is 10 ℃, the cooling water is recycled by a water pump, and the cooling water is placed in a cooling water tank with a length of 2m to quench the spinning solution.
In order to protect the safety of the mixing process of the ultra-high molecular weight polyethylene and facilitate the operation, in this embodiment, preferably, a pressure gauge, a thermometer, a feed inlet and a pressure relief opening are fixed on the hot-melt reaction kettle in the step S1, and the pressure gauge performs pressure relief processing through the pressure relief opening when detecting that the pressure is too high.
After the ultrahigh molecular weight polyethylene is modified, the characteristics of the ultrahigh molecular weight polyethylene are effectively improved, and the experimental results are shown in the following table:
| toughness of | Transparency | Strength and rigidity | Form stability | Creep resistance | |
| Ultra-high molecular weight polyethylene Alkene(s) | Weak toughness | Turbid and unable to Light transmission | The strength of the composite material is relatively brittle, is easy to be damaged | The form is more easily changed Easy to use | After hot melting, the fluidity is strong |
| Ultra-high molecular weight fraction after modification Sub-amounts of polyethylene | Toughness strength Increased by 10 times | Is transparent in color and luster, can High efficiency light transmission | Strength and rigidity Increased by 4 times | After the form is changed, can Realize a certain reset | After hot melting, the fluidity is relatively high Weak, inconvenient and mobile |
Through the experiment, the characteristics of the modified ultrahigh molecular weight polyethylene can be effectively improved, so that the modified ultrahigh molecular weight polyethylene can improve various characteristics, and has high-efficiency production efficiency on the characteristic improvement of the invention.
The working principle and the using process of the invention are as follows:
firstly, carrying out thermal dissolution on ultra-high molecular weight polyethylene, and adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene: placing ultra-high molecular weight polyethylene in a hot-melting reaction kettle, controlling the temperature of the hot-melting reaction kettle at 150 ℃, and then adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene;
secondly, stirring the molten liquid in the step S1, and then adding plant fibers: stirring the hot melt of the ultra-high molecular weight polyethylene by a stirring device on the hot melt reaction kettle, adding plant fibers into the hot melt of the ultra-high molecular weight polyethylene after stirring, and then mixing and stirring;
thirdly, carrying out radiation crosslinking on the mixed ultrahigh molecular weight polyethylene hot melt in the step S2: after the ultra-high molecular weight polyethylene hot melt liquid in the S2 is stirred, carrying out radiation crosslinking on the ultra-high molecular weight polyethylene hot melt liquid for 1h, and then cooling the ultra-high molecular weight polyethylene hot melt liquid after the radiation crosslinking;
fourthly, performing gel spinning on the cooled and cooled ultrahigh molecular weight polyethylene again: placing the cooled and cooled ultrahigh molecular weight polyethylene in a solvent decalin, and stirring and dissolving at 150 ℃ to obtain an ultrahigh molecular weight polyethylene solution for later use;
fifthly, extruding the ultra-high molecular weight polyethylene solution through a spinneret orifice, and solidifying the ultra-high molecular weight polyethylene solution into gel precursor: and extruding the ultra-high molecular weight polyethylene solution prepared in the step S4 through a spinneret orifice, and quenching the spinning solution through cooling water when the ultra-high molecular weight polyethylene solution is sprayed out from the spinneret orifice to obtain the gel precursor.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The preparation method of the ultrahigh molecular weight polyethylene modified fiber is characterized by comprising the following steps:
s1, carrying out thermal dissolution on the ultra-high molecular weight polyethylene, and adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene: placing ultra-high molecular weight polyethylene in a hot-melting reaction kettle, controlling the temperature of the hot-melting reaction kettle to be 150-160 ℃, and then adding silicon dioxide and glass fiber into the ultra-high molecular weight polyethylene;
s2, stirring the molten liquid in the S1, and then adding plant fibers: stirring the hot melt of the ultra-high molecular weight polyethylene by a stirring device on the hot melt reaction kettle, adding plant fibers into the hot melt of the ultra-high molecular weight polyethylene after stirring, and then mixing and stirring;
s3, carrying out radiation crosslinking on the mixed ultrahigh molecular weight polyethylene hot melt in the S2: after the ultra-high molecular weight polyethylene hot melt liquid in the S2 is stirred, carrying out radiation crosslinking on the ultra-high molecular weight polyethylene hot melt liquid for 1-2h, and then cooling the ultra-high molecular weight polyethylene hot melt liquid after the radiation crosslinking;
s4, carrying out gel spinning on the cooled and cooled ultrahigh molecular weight polyethylene again: placing the cooled and cooled ultrahigh molecular weight polyethylene in a decalin solvent, and stirring and dissolving at 150-160 ℃ to obtain an ultrahigh molecular weight polyethylene solution for later use;
s5, extruding the ultra-high molecular weight polyethylene solution through a spinneret orifice, and solidifying the ultra-high molecular weight polyethylene solution into gel precursor: and extruding the ultra-high molecular weight polyethylene solution prepared in the step S4 through a spinneret orifice, and quenching the spinning solution through cooling water when the ultra-high molecular weight polyethylene solution is sprayed out from the spinneret orifice to obtain the gel precursor.
2. The method for preparing the ultra-high molecular weight polyethylene modified fiber according to claim 1, wherein the method comprises the following steps: the diameters of the silica and the glass fiber in the S1 are kept between 0.2nm and 0.5nm, the mass percent of the silica is 8 to 14 percent, and the mass percent of the glass fiber is 7 to 12 percent.
3. The method for preparing the ultra-high molecular weight polyethylene modified fiber according to claim 1, wherein the method comprises the following steps: the stirring speed of the stirring device in the S2 is 300r/min-600r/min, and the stirring time of the stirring device is accompanied with the whole mixing process.
4. The method for preparing the ultra-high molecular weight polyethylene modified fiber according to claim 1, wherein the method comprises the following steps: the plant fiber in the S2 is bamboo charcoal plant fiber, and the diameter of the bamboo charcoal plant fiber is 0.1nm-0.4 nm.
5. The method for preparing the ultra-high molecular weight polyethylene modified fiber according to claim 1, wherein the method comprises the following steps: the radiation crosslinking in S3 is performed by electron beam or gamma ray.
6. The method for preparing the ultra-high molecular weight polyethylene modified fiber according to claim 1, wherein the method comprises the following steps: the cooling in S3 is natural cooling, and the ultra-high molecular weight polyethylene is placed in a sealed environment during the natural cooling, and the cooling time is 1 to 2 days.
7. The method for preparing the ultra-high molecular weight polyethylene modified fiber according to claim 1, wherein the method comprises the following steps: adding an antifreezing agent, a lubricant, a flame retardant and a nucleating agent into the ultra-high molecular weight polyethylene solution in the S4, wherein the antifreezing agent is ethylene glycol, the lubricant is molybdenum disulfide or silicone oil, the flame retardant is triethyl phosphate, and the nucleating agent is kaolin or titanium dioxide.
8. The method for preparing the ultra-high molecular weight polyethylene modified fiber according to claim 1, wherein the method comprises the following steps: before the spinneret orifice in the S5 is extruded, the ultrahigh molecular weight polyethylene solution is subjected to acid washing, hydrochloric acid solution with the mass concentration of 4% -8% is subjected to acid washing, and then the glass fiber is subjected to distilled water washing.
9. The method for preparing the ultra-high molecular weight polyethylene modified fiber according to claim 1, wherein the method comprises the following steps: the temperature of the cooling water in the S5 is 4-10 ℃, the cooling water is recycled through a water pump, and the cooling water is placed in a cooling water tank with the length of 2m to realize the quenching treatment of the spinning solution.
10. The method for preparing the ultra-high molecular weight polyethylene modified fiber according to claim 1, wherein the method comprises the following steps: and a pressure gauge, a thermometer, a feed inlet and a pressure relief opening are fixedly arranged on the hot-melting reaction kettle in the S1, and the pressure gauge is used for carrying out pressure relief treatment through the pressure relief opening when detecting that the pressure is too high.
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