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Linear low-density polyethylene/carbon nanotube open-cell foam material and preparation method thereof

A linear low-density, carbon nanotube technology, applied in the field of polymer materials, linear low-density polyethylene foamed open-cell materials

Active Publication Date: 2018-06-19
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, linear low density polyethylene is mainly used to make films, injection molding and rotational molding, and there are few inventions for making open cell foam materials

Method used

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  • Linear low-density polyethylene/carbon nanotube open-cell foam material and preparation method thereof
  • Linear low-density polyethylene/carbon nanotube open-cell foam material and preparation method thereof

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preparation example Construction

[0030] The preparation method of the alkyl-modified carbon nanotubes can be prepared by covalent bond or non-covalent bond chemical method.

[0031] The chemical method of non-covalent bond can be obtained by selecting suitable surfactants to modify carbon nanotubes. Commonly used alkyl-containing surfactants can be used, such as sodium dodecylbenzenesulfonate and sodium dodecylsulfate. , Sodium dioctyl succinate sulfonate.

[0032] There are many chemical methods of covalent bonding, and there are many modification methods. For example, alkylamines can be grafted to carbon nanotubes to obtain alkyl-modified carbon nanotubes. Commonly used alkylamines include octadecylamine, hexadecylamine, and double-decylamine. Amine, decylamine, octylamine, etc.

[0033] In order to make the alkyl-modified carbon nanotubes and LLDPE have closer solubility parameters and better compatibility, the alkyl groups in the alkyl-modified carbon nanotubes and the ethylene in the linear low-density ...

Embodiment 1

[0062] The LLDPE composition is composed of 100 mass parts of linear low density polyethylene (Dow Chemical, HES-1003NT7) and 1 mass part of octane-modified carbon nanotubes (average diameter 8-15nm, average length 10 -30 μm, obtained by modifying carbon nanotubes with octylamine, modification conditions can refer to chem.Mater., 2003, volume 15, pages 3256-3260). The linear low-density polyethylene resin composition was blended in a Haake micro-mixing rheometer (HaakeMiniLab, ThermoElectron, Germany), blended for 40 minutes, controlled the screw speed at 50r / min, and controlled the temperature at 150 ° C, and then extruded The samples were pressed into 0.2 mm sheets.

[0063] The thin sheet of linear low-density polyethylene resin composition is put into high-pressure mould, and the temperature of control high-pressure mold is 136 ℃, and the thin sheet of linear low-density polyethylene resin composition accounts for 1 / 20 of high-pressure mold volume, injects in the high-pres...

Embodiment 2

[0066] The linear low density polyethylene composition is modified by 100 mass parts of linear low density polyethylene (Dow Chemical Company, Engage8200, ethylene-octene copolymerization, octene content: 7.3 mol %) and 1 mass part of octyl group Carbon nanotubes (average diameter 8-15nm, average length 10-30μm, obtained by modifying carbon nanotubes with octylamine, modification conditions can refer to chem.Mater., 2003, volume 15, pages 3256-3260). The linear low-density polyethylene resin composition was blended in a Haake micro-mixing rheometer (HaakeMiniLab, Thermo Electron, Germany), blended for 40 minutes, controlled the screw speed at 50r / min, and controlled the temperature at 150 ° C, and then extruded The samples were pressed into thin slices of 0.2 mm.

[0067] The thin sheet of linear low-density polyethylene resin composition is put into high-pressure mold, and the temperature of control high-pressure mold is 132 ℃, and the thin sheet of linear low-density polyeth...

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Abstract

The invention relates to a linear low-density polyethylene / carbon nanotube open-cell foam material and a method for preparing the same. The invention belongs to the field of high-molecular materials and in particular relates to the field of linear low-density polyethylene foam open-cell materials. The purpose of the invention is to overcome the defect of the prior art and thus provides a linear low-density polyethylene open-cell foam material which is low in cost, simple in operation, is even in foam cells, has a porosity above 50 percent and has an average aperture of 0.1 to 50mu m, and a method for preparing the same.

Description

technical field [0001] The invention belongs to the field of macromolecule materials, in particular to the field of linear low-density polyethylene foamed open-cell materials. Background technique [0002] Polymer foamed open-cell materials include polyurethane foam, rubber foam and EVA foam, etc., because of their flexibility and ease of processing, they are widely used as cleaning sponges, shock-resistant materials, cushion materials, sound-absorbing materials and various filters. Material. However, due to the poor chemical resistance (acid resistance, alkali resistance) and weather resistance of these foams themselves, in addition, polyurethane and foam rubber are difficult to recycle, and EVA foam materials are polluted during the production process. Materials are limited in use. [0003] Although there is a great demand for open-cell foamed polyethylene, its open-cell foam technology has certain difficulties in foaming process and formula design, especially to achieve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K9/04C08K7/24C08J9/12
CPCC08J9/122C08J2203/06C08J2203/08C08J2205/044C08J2205/05C08J2323/08C08K7/24C08K9/04C08K2201/003C08K2201/004C08K2201/011C08L23/0815
Inventor 张利包锦标
Owner NINGBO UNIV
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