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Preparation method for corncob-shaped polyaniline-supported halloysite nanotube modified polypropylene

A technology of halloysite nanotubes and polyaniline, applied in nanotechnology, plastic recycling, recycling technology, etc., can solve the problems of accelerated aging rate of PP materials, decline in mechanical properties, high surface resistance, etc., and achieve scientific and reasonable preparation methods , increase added value, improve the effect of conductive performance

Active Publication Date: 2018-07-10
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like other polymer materials, PP material itself has low thermal conductivity and high surface resistance, and it is easy to generate static charge accumulation during use, which is an important hidden danger of fire and other safety accidents
At the same time, during the service process of PP engineering materials, the temperature rises. If the heat cannot be conducted in time, not only the aging rate of PP materials will be accelerated, but also its most basic mechanical properties will be greatly reduced.
[0005] In the current literature at home and abroad, the antistatic treatment of PP is mainly by adding a large amount of carbon black, graphite and metal oxides, while there are few reports on the in-situ polymerization and growth of nano-conductive polymers on halloysite nanotubes. , and adding halloysite to PP can also improve the mechanical properties and thermal conductivity of the composite

Method used

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  • Preparation method for corncob-shaped polyaniline-supported halloysite nanotube modified polypropylene
  • Preparation method for corncob-shaped polyaniline-supported halloysite nanotube modified polypropylene
  • Preparation method for corncob-shaped polyaniline-supported halloysite nanotube modified polypropylene

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preparation example Construction

[0025] A preparation method of corncob-shaped polyaniline loaded halloysite nanotube modified polypropylene, the specific steps are as follows:

[0026] 1) Halloysite is purified by acid leaching, ground and sieved, ultrasonically dispersed in deionized water, aniline monomer and ammonium persulfate initiator are added in a low-temperature reaction bath, and the low-temperature polymerization reaction is performed for 24 hours, then stood for 2 hours, and used to remove Wash with ionic water and absolute ethanol until colorless, and vacuum-dry to obtain dark green HNT-PANI powder; wherein, the mass ratio of halloysite nanotubes to aniline monomer is 1:0.5-1:2; The molar ratio of ammonium sulfate is 1:0.67;

[0027] 2) The HNT-PANI powder is melt-extruded and granulated with the composite material, PP and compatibilizer PP-g-MAH in a co-rotating twin-screw extruder. Among them, the reaction temperature of each section of the twin-screw extruder is 180, 185, 190, 190, 195, 195,...

Embodiment 1

[0030] 1) Preparation of corncob-shaped HNT-PANI powder: Halloysite is purified by acid leaching, ground and sieved, then dried in an oven, take 10g of halloysite, 750mL of 1mol / L HC and 10mL of distilled aniline monomer Pour into a 1500mL round bottom flask and ultrasonically disperse at 100W for 1h, place them together in an ice-water bath and magnetically stir for 0.5h, add 15.6g of ammonium persulfate to 250mL of HCl, stir until completely dissolved, and cool in an ice bath for 5 min , poured into a separatory funnel; then control the rate of addition, drop the ammonium persulfate solution within 0.5-1.0h, continue to react for 24h, let stand for 2h, and wash and filter with deionized water and absolute ethanol for many times until The filtrate is transparent, colorless and neutral, then put into a vacuum drying oven, and dry to obtain dark green nanometer HNT-PANI powder;

[0031] 2) HNT-PANI / PP composite material: Take 5g of the nano-powder prepared in step 1), PP-g-MAH ...

Embodiment 2

[0033] In step 2), 10g of HNT-PANI nanopowder, 39.2g of PP-g-MAH and 450.8g of PP were added, and the other condition parameters were the same as in Example 1, and finally a 2wt% HNT-PANI / PP composite material was obtained.

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Abstract

The invention discloses a preparation method for corncob-shaped polyaniline-supported halloysite nanotube modified polypropylene (PP). The method comprises the following specific steps: performing in-situ polymerization on aniline on cleaned halloysite nanotubes in an ice-water bath, performing mixing on corncob-shaped polyaniline-supported halloysite nanotube composite powder obtained by vacuum drying and a PP plastic in a high-speed mixing machine according to a certain ratio, performing extrusion granulation by using a twin-screw extruder, and performing injection molding by adopting an injection molding machine to prepare a standard sample strip of the halloysite nanotube-polyaniline / PP composite material. The corncob-shaped polyaniline-supported halloysite nanotubes prepared by the method provided by the invention have excellent electrical conductivity, thermal conductivity and flame retardance, the mechanical properties of the composite material can be improved, electrical and flame-retardant properties of a PP engineering material can be improved, and an application field of PP is greatly expanded.

Description

technical field [0001] The invention belongs to the technical field of polymer composite material preparation, and in particular relates to the preparation and method of corncob-shaped polyaniline-loaded halloysite nanotube-modified PP. Background technique [0002] Halloysite nanotube (HNT) is a new type of nanomaterial, generally with an outer diameter of 40~100nm and a length of about 0.2~2μm. Silicon-oxygen tetrahedral crystal lattice is dislocated and curled. It is cheap and easy to obtain and has excellent thermal conductivity, flame retardancy and mechanical properties. The current research on it is the frontier and hotspot in the international material field. Compared with carbon nanotubes, it has unique structural features and obvious resource advantages. [0003] Polyaniline is a synthetic polymer compound with special electrical properties, which are reflected in pH, temperature and doping during synthesis. Especially in the process of chemical oxidation synthes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08K9/12C08K7/26C08G73/02
CPCC08G73/0266C08L23/12C08L2201/04C08K2201/011C08K2201/017C08K2201/001C08L51/06C08K9/12C08K7/26B29B7/007B29B7/06B29B7/12B29B2009/125B82Y40/00C08L53/00C08K7/02B29B9/10B29C45/77B29C45/78C01P2004/13C01P2004/64C08K3/346
Inventor 郑玉婴苏义军
Owner FUZHOU UNIV
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