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

YANAN BICON PHARMACEUTICAL LISTED COMPANY

4 Cites 25 Cited by

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...

Abstract

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

Examples

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.

PUM

Property	Measurement	Unit
Particle size	0.5 ~ 1.5	µm
Particle size	0.33 ~ 0.35	nm
Kinematic viscosity	70.0 ~ 75.0	cSt

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Classification and recommendation of technical efficacy words

Excellent performance
Easy to prepare

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

PUM

Description & Claims & Application Information

Similar technology patents

Boron-gallium codoped quasi-monocrystalline silicon and preparation method thereof

Quaternary ammonium salt type surfactant fracturing fluid

Normal-temperature processed cheese and preparation method thereof

Medical adhesives and preparation method thereof

Methanol gasoline and its preparation method

Classification and recommendation of technical efficacy words

Method for co-channel interference cancellation in a multicarrier communication system

Three-dimensional convolution and Faster RCNN-based video action detection method

Nematic phase liquid crystal composition

Method for supporting nano titanic oxide on surface of carrier material

Coal ash casting paint

Method for removing pollutants in sewage

Carbon nanofiber aerogel as well as preparation method and application thereof

Health care medicinal tea and preparation process thereof

Non-mercury catalyst for acetylene hydrochlorination and method of preparing the same

High-strength ultra-high-toughness concrete and preparation method thereof