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Preparation method of PA6 (polyamide 6)/PP (polypropylene)/carbon nano tube high-performance nano composite material

A nanocomposite material and carbon nanotube technology, which is applied in the field of preparation of polyamide 6/polypropylene/carbon nanotube high-performance nanocomposite materials, can solve problems such as poor dimensional stability, application limitations, and high water absorption. Achieve high tensile strength and flexural strength, performance improvement, and simple preparation process

Inactive Publication Date: 2015-03-04
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its high water absorption and poor dimensional stability limit its application.
However, if PP and PA6 are blended, the disadvantages of a single polymer can be overcome

Method used

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  • Preparation method of PA6 (polyamide 6)/PP (polypropylene)/carbon nano tube high-performance nano composite material
  • Preparation method of PA6 (polyamide 6)/PP (polypropylene)/carbon nano tube high-performance nano composite material
  • Preparation method of PA6 (polyamide 6)/PP (polypropylene)/carbon nano tube high-performance nano composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1) Coating silica by sol-gel method: In a 500 mL beaker, add 2.0 g of dry carbon nanotubes and 200 mL of an aqueous solution containing 0.5 wt% sodium dodecylsulfonate, and disperse with 80 kHz ultrasonic waves 2 h. The obtained solution is filtered by a Buchner suction filtration device, washed three times with deionized water, and excess sodium dodecylsulfonate not coated on the surface of the carbon nanotubes is removed to obtain surfactant-treated carbon nanotubes. Under the action of ultrasonic waves, the surfactant-treated carbon nanotubes are redispersed in deionized water to obtain a uniformly dispersed carbon nanotube aqueous solution. According to the volume ratio of 5:1, the aqueous solution of carbon nanotubes was added to the mixed solution of ethyl orthosilicate, deionized water and absolute ethanol (the weight ratio of ethyl orthosilicate, deionized water and absolute ethanol The ratio is 2:1:4). The obtained mixed solution was ultrasonically treated fo...

Embodiment 2

[0029]The mass ratio of PP and PA6 is 70:30, and other conditions are the same as in Example 1, which is recorded as PP / PA6. Experiments show that the tensile strength of PP / PA6 is 31.06 MPa, and the bending strength is 50.02 MPa.

Embodiment 3

[0031] The mass ratio of PP, PA6, PP-g-MAH is 70:30:5, and other conditions are the same as in Example 1, which is recorded as PP / PA6 / 5M. Experiments show that the tensile strength of PP / PA6 / 5M is 38.89MPa, The bending strength is 54.42MPa.

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Abstract

The invention provides a preparation method of a PA6 (polyamide 6) / PP (polypropylene) / carbon nano tube high-performance nano composite material. The preparation method comprises the following steps: firstly, coating the surface of a carbon nano tube with a layer of silicon oxide by virtue of a sol-gel method; then, performing surface treatment on a coated carbon nano tube by using a silane coupling agent, and then preparing the PA6 / PP / carbon nano tube high-performance nano composite material by adopting a melt blending method. According to the experiments, a 3-amino propyl triethoxy silane (KH-550) surface treatment carbon nano tube can be used for effectively improving the dispersion of the carbon nano tube in PA6 / PP matrix and increasing the interface bonding between the carbon nano tube and the PA6 / PP base body. By adding the carbon nano tube as a reinforcer of the PA6 / PP polymer, the mechanical performance of the polymer can be obviously improved.

Description

technical field [0001] The invention belongs to the field of chemical composite materials, and in particular relates to a preparation method of polyamide 6 / polypropylene / carbon nanotube high-performance nano composite material. Background technique [0002] Carbon nanotubes (CNTs) have attracted great interest since their discovery. CNTs have excellent mechanical properties, excellent chemical stability and thermal stability, good electrical properties and microwave absorption characteristics, and have unique nano-effects unique to one-dimensional nanostructures, making them ideal reinforcements for polymer materials. body, and can endow polymer materials with many new functions. However, the high surface energy of CNTs is prone to agglomeration, making it difficult to achieve uniform and fine dispersion in the polymer matrix. CNTs must be tightly combined with the polymer matrix as a reinforcement material, so that the stress can be effectively transmitted to the CNTs. H...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L77/02C08L51/06C08K9/10C08K9/06C08K9/04C08K7/24
CPCC08K2201/011C08L23/12C08L2205/03C08L77/02C08L51/06C08K9/10C08K9/06C08K7/24
Inventor 欧宝立何聪刘俊成周智华
Owner HUNAN UNIV OF SCI & TECH
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