Method for modifying surface of ultra-high molecular weight polyethylene fiber

An ultra-high molecular weight, surface modification technology, applied in the direction of single-component polyolefin rayon, chemical characteristics of fibers, textiles and papermaking, etc., can solve the difficulty of preparing modified polyethylene, difficult to control the length of polyethylene segment, It is difficult to obtain and other problems, and achieves the effects of low cost, uniform coverage and easy preparation.

Active Publication Date: 2019-12-06
NANJING UNIV OF TECH
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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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  • Method for modifying surface of ultra-high molecular weight polyethylene fiber
  • Method for modifying surface of ultra-high molecular weight polyethylene fiber
  • Method for modifying surface of ultra-high molecular weight polyethylene fiber

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 modifying the surface of an ultra-high molecular weight polyethylene fiber. The method comprises the specific steps that firstly, ultra-high molecular weight polyethylene fiber powder is added into a solvent, swelling pretreatmnet is conducted, then, a bipolar molecular modifying agent, an antioxidant and an ultraviolet absorbent are added into a swelling solution to obtain a swelling mixed solution, and the ultra-high molecular weight polyethylene fiber swelling mixed solution is evenly fed to a dual-screw extruder for gel spinning; a gel yarn is sprayed from a spinneret plate and enters a water bath tank to obtain primary cellosilk; the primary cellosilk is placed at the room temperature for 24-48 hours and washed in a clear water tank; through dryingand hyperthermal stretching, the modified ultra-high molecular weight polyethylene fiber is obtained. According to the method, on the premise of guaranteeing that the mechanical property of the ultra-high molecular weight polyethylene fiber is not lowered, the polarity of the surface of the fiber is improved, the good cohesiveness between the ultra-high molecular weight polyethylene fiber and a resin base is achieved, and the application range of the ultra-high molecular weight polyethylene fiber in the aspect of structural materials is enlarged.

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 Applications(China)
IPC IPC(8): D01F6/46D01F1/10
CPCD01F6/46D01F1/10
Inventor 江国栋朱超群
Owner NANJING UNIV OF TECH
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