A method for surface modification of ultra-high molecular weight polyethylene fibers

An ultra-high molecular weight, polyethylene fiber technology, applied in the direction of single-component polyolefin artificial filament, fiber chemical characteristics, textiles and papermaking, etc., can solve the problem of difficult control of polyethylene segment length, difficult to obtain, modified polyethylene Problems such as difficulty in preparation, to achieve the effect of low cost, easy preparation, and uniform coverage

Active Publication Date: 2022-04-26
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modified polyethylene used is difficult to prepare and difficult to obtain, and it is difficult to control the length of the polyethylene segment

Method used

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  • A method for surface modification of ultra-high molecular weight polyethylene fibers
  • A method for surface modification of ultra-high molecular weight polyethylene fibers
  • A method for surface modification of ultra-high molecular weight polyethylene fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 100 parts of ultra-high molecular weight polyethylene powder with a number average molecular weight of 4.2 million into decahydronaphthalene to form a swelling solution with a mass concentration of 5%, add 2 parts of fatty alcohol polyoxyethylene ether AEO-4 (wherein n=16 , m=4), 2 parts of antioxidant 1076 and 0.2 part of ultraviolet absorber UV326, the swelling temperature is 80° C., and the swelling time is 4 hours to obtain a swelling mixture. Add the swelling mixed liquid to the feed port while stirring, and spin through a twin-screw extruder at an extrusion temperature of 160°C and a spinning temperature of 200°C. The gel silk enters the water bath through the air section of more than ten centimeters, and is immersed in water for 30 seconds to obtain the primary fiber silk. The as-spun fibers were left to stand and dried to remove the solvent, and the drying temperature was 60°C. The prepared as-spun fiber filaments are cleaned and then stretched with ultra-h...

Embodiment 2

[0031] 100 parts of ultra-high molecular weight polyethylene powder with a number average molecular weight of 3.5 million are added to tetralin to form a swelling solution with a mass concentration of 10%, and 2 parts of fatty alcohol polyoxyethylene ether AEO-6 (wherein n=10 , m=6), 2 parts of antioxidant 1076 and 0.3 part of ultraviolet absorber UV531, the swelling temperature is 85° C., and the swelling time is 3 hours to obtain a swelling mixture. Add the swelling mixed liquid to the feed port while stirring, and spin through a twin-screw extruder at an extrusion temperature of 180°C and a spinning temperature of 200°C. The gel filament enters the water bath through the air section of more than ten centimeters, and is immersed in water for 60 seconds to obtain the primary fiber filament. The as-spun fibers were left to stand and dried to remove the solvent, and the drying temperature was 60°C. The prepared as-spun fiber filaments are cleaned and then stretched with ultra-...

Embodiment 3

[0033]The number-average molecular weight is 4,000,000 ultra-high molecular weight polyethylene powder 100 parts join in the tetralin and be configured into the swelling liquid that mass concentration is 6%, add the fatty alcohol polyoxyethylene base ether AEO-8 of 1.5 parts (wherein n= 16, m=8), 1 part of antioxidant 1010 and 0.3 part of ultraviolet absorber UV234, the swelling temperature is 90° C., and the swelling time is 4 hours to obtain a swelling mixture. Add the swelling mixed liquid to the feed port while stirring, and spin through a twin-screw extruder at an extrusion temperature of 160°C and a spinning temperature of 210°C. The gel silk enters the water bath through the air section of more than ten centimeters, and is immersed in water for 30 seconds to obtain the primary fiber silk. The as-spun fibers were left to stand and dried to remove the solvent, and the drying temperature was 60°C. The prepared as-spun fiber filaments are cleaned and then stretched with ul...

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Abstract

The invention discloses a method for surface modification of ultra-high molecular weight polyethylene. The specific steps are as follows: firstly add ultra-high molecular weight polyethylene powder into a solvent, perform swelling pretreatment, and then add bipolar molecular modification to the swelling solution. The swelling mixed solution is obtained by using additives, antioxidants and ultraviolet absorbers, and then the ultra-high molecular weight polyethylene swelling mixed solution is evenly fed to the twin-screw extruder for gel spinning; the gel filaments are sprayed from the spinneret into the The primary fiber filaments were obtained in a water bath; the primary fiber filaments were placed at room temperature for 24-48 hours, and then washed in a clear water tank; after drying, super-heated stretching was performed to obtain modified ultra-high molecular weight polyethylene fibers. On the premise of ensuring that the mechanical properties of ultra-high molecular weight polyethylene fibers do not decrease, the invention improves the polarity of the fiber surface, realizes good adhesion between ultra-high molecular weight polyethylene fibers and resin matrix, and expands the use of ultra-high molecular weight polyethylene fibers in structural materials. aspects of application.

Description

technical field [0001] The invention relates to a method for modifying the surface of ultra-high molecular weight polyethylene fibers. Background technique [0002] Ultra-high molecular weight polyethylene fiber is the third generation of high-performance fiber after carbon fiber and aramid fiber. It has the characteristics of high strength, high modulus, chemical corrosion resistance, wear resistance and low density. Its highly symmetrical sub The methyl structure makes UHMWPE have high crystallinity and orientation. However, UHMWPE fibers still have deficiencies in heat resistance, creep resistance and oxidation resistance. In addition, due to the lack of polar groups on the surface, the surface energy is low, and it is difficult to form chemical bonds with the resin matrix, resulting in poor interfacial bonding between fibers and resin-based materials, which limits the application of ultra-high molecular weight polyethylene fibers in structural materials. Therefore, mod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/46D01F1/10
CPCD01F6/46D01F1/10
Inventor 江国栋朱超群
Owner NANJING TECH UNIV
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