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Graphene/UHMWPE composite fiber and preparation method and application thereof

A composite fiber and graphene technology, applied in the chemical characteristics of fibers, rayon manufacturing, textiles and papermaking, etc., can solve the problems of easy stacking of sheets, difficult to disperse, and the excellent properties of graphene cannot be fully utilized, and achieve composite simple craftsmanship

Active Publication Date: 2016-12-14
南通恒尚新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of graphene is small, and the strong van der Waals force is formed between the sheets due to the conjugated structure, making the sheets easy to stack and difficult to disperse
The traditional melt-blending composite method adopts the direct feeding method of graphene powder. Since the graphene is wrapped by the molten high-viscosity polymer, it cannot fully diffuse in the system, so that the effective dispersion of graphene cannot be guaranteed, making the graphene Excellent performance has not been fully utilized
Graphene, which is also an inorganic substance, has poor compatibility with the polymer interface, which affects the interface bonding force between it and polymers, and the mechanical properties are not significantly improved.
Patent CN201210078324 and patent CN201510165000 use coupling agent to modify graphene to improve its dispersibility and compatibility, but the reduced graphene surface active groups are less, grafting is difficult, and the graphene powder that has been agglomerated is very difficult. It is difficult to carry out secondary dispersion, which greatly affects the material properties
In addition, the solid state in melt blending or the liquid-solid mixing method adopted in patent CN201210078324 and patent CN201510165000 cannot achieve molecular level contact mixing between graphene and UHMWPE molecular chains, which directly affects the uniform distribution of graphene in the system

Method used

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  • Graphene/UHMWPE composite fiber and preparation method and application thereof
  • Graphene/UHMWPE composite fiber and preparation method and application thereof
  • Graphene/UHMWPE composite fiber and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] 1) Prepare graphene dispersion:

[0066] Disperse 0.5 g of oily dispersant (BYK163) in 250 mL of white oil in advance, and gradually add 5 g of graphene powder modified by polystyrene sodium sulfonate (PSS) under the action of a high-speed shearing machine, that is, alkylation modified The permanent graphene powder is added in three batches, which are 4 / 10, 3 / 10, and 3 / 10 of the total amount in turn. After the previous batch of alkylated modified graphene powder is completely infiltrated, add next batch. After mechanical dispersion under the action of a high-speed shearing machine, a graphene dispersion liquid is formed.

[0067] Among them, the high-speed shearing machine adopts a homogeneous disperser with a linear speed of 6m / s and a mechanical dispersion treatment time of 0.5h; the mass disperser is equipped with zirconia grinding beads with a particle size of 0.3mm.

[0068] 2) Prepare UHMWPE solution

[0069] According to UHMWPE powder: white oil is the relatio...

Embodiment 2

[0075] 1) Prepare graphene dispersion:

[0076] Pre-disperse 1.0g of dispersant (BYK165) in 500mL of mineral oil, and gradually add 10g of graphene powder modified by sodium dodecyl sulfate (SDS) under the action of high-speed shearing machine, that is, alkylation modification The graphene powder was added in three batches, which were 4 / 10, 3 / 10, and 3 / 10 of the total amount in turn. After the previous batch of alkylated modified graphene powder was completely infiltrated, the next batch was added a batch. After mechanical dispersion under the action of a high-speed shearing machine, a graphene pre-dispersion liquid is formed.

[0077] Wherein, the high-speed shearing machine and the high-speed vibrator have a linear velocity of 4 m / s and a dispersion treatment time of 0.5 h; zirconia grinding beads with a particle size of 0.3-0.6 mm are added to the high-speed vibrator.

[0078] 2) Prepare UHMWPE solution

[0079] According to UHMWPE powder: mineral oil is the relation of ...

Embodiment 3

[0085] 1) Prepare graphene dispersion:

[0086] Disperse 3.0g dispersant (AFCONA4000) in 1500mL paraffin oil in advance, and gradually add 30g graphene powder modified by silane coupling agent under the action of high-speed shearing machine, that is, graphene powder modified by alkylation Add in three batches, which are 4 / 10, 3 / 10, and 3 / 10 of the total amount in turn. After the previous batch of alkylated modified graphene powder is completely infiltrated, add the next batch. After mechanical dispersion under the action of a high-speed shearing machine, a graphene pre-dispersion liquid is formed.

[0087]Among them, the high-speed shearing machine adopts a homogeneous disperser with a linear speed of 2m / s and a dispersion treatment time of 0.5h; 0.3-0.6mm zirconia grinding beads are added to the homogeneous disperser.

[0088] 2) Prepare UHMWPE solution

[0089] According to UHMWPE powder: paraffin oil is the relation of 1g: 100mL (the scheme of the present invention is not...

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Abstract

The invention discloses a graphene / UHMWPE composite fiber and a preparation method thereof. In the composite fiber, the content of graphene is 0.05-5 wt% of that of UHMWPE. The preparation method comprises: pre-dispersing graphene in a solvent to form a uniform graphene dispersion liquid, fully dissolving UHMWPE powder in a solvent in a heating condition, fully mixing the obtained solution with the obtained graphene dispersion liquid, spinning the fully-mixed UHMWPE / graphene mixed solution through a gel-spinning method, and performing solvent extraction and drawing to obtain the graphene / UHMWPE composite fiber. The prepared graphene / UHMWPE composite fiber is obviously improved in the mechanical strength. The tensile strength can reach 29 cN / dtex, and the tensile modulus can reach 1300 cN / dtex. Through changing the addition ratio of graphene and UHMWPE powder, the size of graphene and different dispersion processes, the mechanical property of the composite fiber can be regulated.

Description

technical field [0001] The invention relates to an ultra-high molecular weight polyethylene fiber added with graphene, which belongs to the field of polymer materials. Background technique [0002] As one of the three high-performance fibers in the world today, ultra-high molecular weight polyethylene (UHMWPE) fibers have excellent specific strength and specific modulus, and have great advantages in lightweight composite materials. Areas such as sea area defense equipment play a pivotal role. In the late 1970s, the Dutch DSM company first developed the UHMWPE gel spinning technology, which made revolutionary progress in the strength and modulus of UHMWPE, and applied for the first patent on the preparation of UHMWPE fibers by gel spinning. Later, the Honeywell Company of the United States and the Toyobo Company of Japan successively developed the preparation technology for the commercial production of high-performance UHMWPE fibers, and applied for a large number of patents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/46D01F1/10C08K9/06C08K9/04C08K7/00C08K3/04C08L23/06C08L91/06
CPCC08K2201/006C08L23/06C08L2203/12C08L2207/068D01F1/10D01F6/46C08L91/06C08K9/06C08K9/04C08K7/00C08K3/04
Inventor 孙丹萍丁怀东徐阳瞿研
Owner 南通恒尚新材料科技有限公司
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