A kind of ultra-high molecular weight polyethylene fiber surface functionalization treatment method

An ultra-high molecular weight, polyethylene fiber technology, which is applied in fiber processing, textiles and papermaking, etc., can solve problems such as high equipment requirements, difficult resin wetting, and reduced fiber strength due to oxidation, to achieve uniform functionalization and improve viscosity. The effect of knot strength

Inactive Publication Date: 2018-02-13
宿迁市南京工业大学新材料研究院 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with carbon fiber and aramid fiber, domestic UHMWPE fiber technology is more mature. However, the surface of oriented UHMWPE fiber has no reactive sites and cannot form chemical bonds with resin. The surface energy is low and is not easily wetted by resin. The rough surface is used to form mechanical engagement points, which limits its application in structural materials, so the modification of the fiber surface has great significance and broad application prospects for the application of ultra-high polyethylene fibers in composite materials
[0003] At present, the methods for polarizing the surface of polyolefin mainly include chemical oxidation treatment, corona treatment, plasma treatment and other surface modifications. Among them, chemical oxidation treatment uses strong oxidants, pollutes the environment, and easily causes the degree of oxidation to be too deep to reduce the fiber strength. decline; plasma has high requirements on equipment, and the surface polarization of corona treated fibers is not uniform. These methods are difficult to realize industrialization

Method used

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  • A kind of ultra-high molecular weight polyethylene fiber surface functionalization treatment method
  • A kind of ultra-high molecular weight polyethylene fiber surface functionalization treatment method
  • A kind of ultra-high molecular weight polyethylene fiber surface functionalization treatment method

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Experimental program
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Effect test

Embodiment 1

[0026] The surface chlorination reaction of UHMWPE fiber is carried out through the chlorinated aqueous phase system. The chlorinated aqueous solution contains: 100 parts of deionized water, 0.4 parts of chlorine, the reaction temperature is 65 ° C, and the chlorination degree is 30 through the immersion time in the water tank for 10 minutes. % of UHMWPE fiber surface, UHMWPE fiber after surface chlorination undergoes atomic group transfer reaction through grafting reaction aqueous solution, and its grafting reaction aqueous solution contains: 100 parts of deionized water, 0.2 part of oxidant CuCl 2 , 1 part of reducing agent ethylene glycol, 3 parts of active monomer hydroxyethyl methacrylate, 1 part of redox catalyst sodium carbonate, 0.5 part of complexing agent pyridine, the grafting reaction temperature is 40 ° C, the reaction time is 30 min, then The fibers after branching reaction were washed in a water tank and dried with hot air at 80°C to obtain UHMWPE fibers with hyd...

Embodiment 2

[0029] The surface chlorination reaction of UHMWPE fibers is carried out through the chlorine-containing aqueous phase system. The chlorination aqueous solution contains: 100 parts of deionized water, 0.25 parts of chlorine, the reaction temperature is 75 ° C, and the chlorination degree is 30 after the immersion time in the water tank for 5 minutes. % of the UHMWPE fiber surface, the UHMWPE fiber after surface chlorination undergoes atomic group transfer reaction in the grafting reaction aqueous solution, and the grafting reaction aqueous solution contains: 100 parts of deionized water, 0.5 parts of oxidant CuBr 2 , 4 parts of active monomer hydroxyethyl methacrylate, 1 part of reducing agent glycerin, 1 part of redox catalyst sodium carbonate, 0.5 parts of complexing agent bipyridine, the grafting reaction temperature is 50 ° C, and the reaction time is 20 minutes , the fibers after the grafting reaction were washed in a water tank and dried with hot air at 80°C to obtain UHM...

Embodiment 3

[0032] The surface chlorination reaction of UHMWPE fiber is carried out through the chlorinated aqueous phase system. The chlorinated aqueous solution contains: 100 parts of deionized water, 0.3 parts of chlorine, the reaction temperature is 60 ° C, and the chlorination degree is 30 through the immersion time in the water tank for 10 minutes. % of the UHMWPE fiber surface, the UHMWPE fiber after surface chlorination undergoes atomic group transfer reaction in the grafting reaction aqueous solution, and the grafting reaction aqueous solution contains: 100 parts of deionized water, 0.6 parts of oxidant CuCl 2 / FeCl 3 (recombined at a molar ratio of 1:0.2), 6 parts of active monomer hydroxypropyl methacrylate, 1 part of reducing agent glucose, 1 part of redox catalyst disodium hydrogen phosphate, 0.6 part of complexing agent tris-(2-di Methylaminoethyl)amine, the grafting reaction temperature is 70°C, and the reaction time is 15min. After the grafting reaction, the fibers are was...

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Abstract

The invention discloses a method for surface functionalization treatment of UHMWPEF (Ultra High Molecular Weight Polyethylene Fiber), which is capable of realizing good binding of fiber surface and matrix resin, so as to increase the mechanical property of a fiber-reinforced composite material. The method comprises the following steps: (1) drawing the UHMWPEF into a closed water tank containing a chlorine water phase system, and carrying out a surface chlorination reaction, thus obtaining chlorinated fiber of which the surface chlorination degree is 20 to 50 percent; (2) washing the chlorinated fiber through a circulating clear water tank; (3) drawing the washed chlorinated fiber into a grafting reaction water tank, and dipping, thus obtaining surface-hydroxylated fiber; (4) washing the surface-hydroxylated fiber through the circulating clear water tank and blow-drying; (5) putting the surface-hydroxylated fiber into a functionalization monomer solution, and controlling the system temperature or adding a reaction catalyst according to different functionalization monomer reaction requirements, thus obtaining the surface-functionalized UHMWPEF.

Description

technical field [0001] The invention relates to a fiber surface functionalization treatment method, in particular to a super high molecular weight polyethylene fiber surface functionalization treatment method. Background technique [0002] Fiber-reinforced composites have a huge market demand. So far, the fibers that have been used in high-performance resin-based composites in China mainly include: carbon fibers, aramid fibers and high-strength glass fibers, and the surfaces of these fibers contain abundant polar groups (such as: carbonyl, carboxyl, amino and hydroxyl groups). Such groups) can play a good connection with the resin, but the price is relatively high, which limits its large-scale use. Ultra High Molecular Weight Polyethylene Fiber (full name in English: Ultra High MolecularWeight Polyethylene Fiber, referred to as UHMWPE) energy absorption performance and wear resistance are better than aramid fiber, elongation at break is significantly higher than carbon fibe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/09D06M14/10D06M13/203D06M13/192D06M13/395C08J5/06D06M101/20
CPCC08J5/046C08J5/06C08J2423/06D06M11/09D06M13/192D06M13/203D06M13/395D06M14/10D06M2101/20
Inventor 江国栋张自豪沈晓冬周明柱姜帅
Owner 宿迁市南京工业大学新材料研究院
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