Graphene composite modified high-strength polyethylene fiber and preparation method thereof

A high-strength polyethylene and graphene composite technology, which is applied in the direction of wet spinning, single-component polyolefin artificial filament, etc., can solve problems such as poor temperature resistance and heat transfer, inability to conduct heat energy, and product breakdown. Achieve the effects of increasing temperature resistance and heat transfer rate, making the preparation method simple and improving performance

Inactive Publication Date: 2015-07-08
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AI-Extracted Technical Summary

Problems solved by technology

[0003] However, due to the structure of polyethylene itself, it is poor in temperature resistance and heat transfer. The long-term use temperature is not higher than 80 degrees, and it can be used at 120 degrees in the short term. The thermal conductivity is only 20w/m.k
The non-woven fabric products made of high-strength polyethylene fibers cannot quickly conduct the heat energy converted from...
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The invention discloses graphene composite modified high-strength polyethylene fiber and a preparation method thereof. The graphene composite modified high-strength polyethylene fiber comprises UHMWPE (ultra-high molecular weight polyethylene) and graphene, wherein calculated by weight percentage, UHMWPE accounts for 98%-99.8%, and graphene accounts for 0.2%-2%; the molecular weight of UHMWPE is 2.4 million-2.6 million; and the particle size of graphene is 0.5-1.5um, and the particle size is 0.33-0.35nm. The preparation method disclosed by the invention is simple and convenient, and excellent performances are realized. Graphene is mixed into a white oil solution of UHMWPE by a method of adding a stock solution, uniform stirring is performed, and then the graphene modified high-strength polyethylene fiber is further prepared by spinning by a wet spinning method, so that the performances are effectively improved.

Application Domain

Wet spinning methodsMonocomponent polyolefin artificial filament +1

Technology Topic

Ultra-high-molecular-weight polyethyleneFiber +3


  • Experimental program(1)

Example Embodiment

[0020] A graphene composite modified high-strength polyethylene fiber, which is characterized by: composed of UHMWPE and graphene; among them, UHMWPE accounts for 98%-99.8% by weight percentage, and graphene accounts for 0.2%-2%; the molecular weight of UHMWPE Between 2.4 million and 2.6 million; graphene has a particle size of 0.5-1.5um and a particle size of 0.33-0.35nm.
[0021] The preparation method of the graphene composite modified high-strength polyethylene fiber includes the following steps:
[0022] (1) Preparation of graphene pre-dispersion: put a certain amount of graphene, coupling agent, and non-ionic surfactant into the white oil medium, and use a powerful emulsifier to emulsify;
[0023] (2) Preparation of UHMWPE suspension: Put the UHMWPE raw materials and solvent white oil into the mixing kettle and stir to make a uniform suspension;
[0024] (3) Add the prepared graphene pre-dispersion to the UHMWPE suspension to prepare spinning dope, and stir evenly;
[0025] (4) The evenly stirred spinning dope is heated and dissolved and extruded in a twin-screw extruder, and then cooled into a jelly thread;
[0026] (5) Extract, dry and post-stretch the jelly filaments after balancing for at least 48 hours to obtain graphene composite modified high-strength polyethylene fibers.
[0027] In step (1): the concentration of the graphene in the white oil is 5%; the coupling agent is a titanate coupling agent, and the amount is 1%-2% of the graphene (e.g. 1%, 1.5%) , 2%); the non-ionic surfactant is a polyethylene glycol ether non-ionic surfactant, the amount is 2.5-5% of graphene (for example, 2.5%, 3.5%, 5%); the white oil It is a C18-C22 alkane, the kinematic viscosity at 40°C is 70-75Cst; the emulsification time is 2h-4h (examples 2h, 3h, 4h).
[0028] In step (2): the UHMWPE raw material has a molecular weight of 4 million to 5 million, and its concentration in white oil is 8-10%; the holding temperature of the mixing kettle is 70°C; the stirring time is 2h-4h (example 2h , 3h, 4h), stirring speed 60rpm.
[0029] In step (3): the stirring time is 1h-2h, and the stirring speed is 60rpm.
[0030] In step (4): the length-to-diameter ratio of the twin-screw extruder is 54-70 and consists of a feeding section, a heating section, a dissolving section and a mixing section; the minimum temperature of the heating section is 240°C, and the maximum temperature of the dissolving section is 260°C ; The cooling temperature is 0-15°C (for example, 0°C, 10°C, 15°C).
[0031] In step (5): the extraction agent is xylene, hydrocarbon cleaning agent or tetrachloroethylene, the extraction temperature is 20-40°C (for example, 20°C, 30°C, 40°C); the drying temperature is 15-35°C ( Example 13°C, 25°C, 35°C); the post-stretching ratio is not less than 7 times.


Particle size0.5 ~ 1.5µm
Particle size0.33 ~ 0.35nm
Kinematic viscosity70.0 ~ 75.0cSt

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