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Preparation method of polyolefin nanometer composite material

A nano-composite material and polyolefin technology, applied in the field of preparation of polyolefin nano-composite materials, can solve the problems of low preparation efficiency, large amount of ash, restricting the performance of materials, etc., and achieve the effect of uniform dispersion of nano-fillers and excellent mechanical properties.

Active Publication Date: 2018-08-31
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in addition to low preparation efficiency, chemical blending will also generate a large amount of ash, which is not conducive to the subsequent processing of nanocomposites
[0005] In addition, in the existing methods for preparing polyolefin nanocomposites (including physical blending method and chemical blending method), the mixing amount of inorganic nanofillers cannot exceed 10wt%, otherwise due to the nanosize effect of nanofillers, the A large amount of micron-scale agglomeration occurs in polyolefin, which seriously restricts the performance of the material

Method used

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  • Preparation method of polyolefin nanometer composite material
  • Preparation method of polyolefin nanometer composite material
  • Preparation method of polyolefin nanometer composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of polyolefin nanocomposite material, comprises the steps:

[0027] (1) Provide 10g of polyethylene particles with a pore volume of 1.5mL / g, and the porous structure inside the primary particles is as follows: figure 1 Shown; (2) 7.125g TiCl 4 After mixing with 10mL of toluene, add polyethylene particles in step (1) and impregnate for 108h to obtain TiCl 4 / mixed solution of polyethylene particles / toluene; (3) TiCl 4 The mixed solution of polyethylene particles / toluene was frozen with liquid nitrogen, and then vacuum-dried. After the mixed solution was thawed, it was frozen again with liquid nitrogen and dried slowly, and the dried particles were obtained in a cycle of 20 times; (4) 100mL concentration The hydrochloric acid / ethanol solution that is 2mol / L steams in the dry granule gained in the step (3) in the form of steam, and steam enters speed 0.1mL / min, obtains the granule after steam fumigation; (5) the granule after steam fumigation Wash...

Embodiment 2

[0029] The preparation method of polyolefin nanocomposite material, comprises the steps:

[0030] (1) Provide 10g of polyethylene particles with a pore volume of 1.5mL / g, and the porous structure inside the primary particles is as follows: figure 1 Shown; (2) 2.375g TiCl 4 After mixing with 5mL of toluene, add polyethylene particles in step (1) and impregnate for 24h to obtain TiCl 4 / mixed solution of polyethylene particles / toluene; (3) TiCl 4 The mixed solution of polyethylene particles / toluene was frozen with liquid nitrogen, and then vacuum-dried. After the mixed solution was thawed, it was frozen again with liquid nitrogen and dried slowly, and the dried particles were obtained in a cycle of 5 times; (4) 100mL concentration The hydrochloric acid / ethanol solution that is 0.1mol / L is steamed in the dry particle gained in the step (3) in the form of steam, and steam enters speed 0.1mL / min, obtains the particle after steam fumigation; (5) the particle after steam fumigation...

Embodiment 3

[0032] The preparation method of polyolefin nanocomposite material, comprises the steps:

[0033] (1) 10 g of polypropylene particles with a pore volume of 0.01 mL / g are provided; (2) 4.0 g of TiCl 3 After mixing with 0.1mL tetrahydrofuran, add polypropylene particles in step (1) and impregnate for 76h to obtain TiCl 3 / The mixed solution of polypropylene particles / tetrahydrofuran; (3) TiCl 3The mixed solution of polypropylene particles / tetrahydrofuran was frozen with liquid nitrogen, and then vacuum-dried. After the mixed solution was thawed, it was frozen again with liquid nitrogen and dried slowly. The cycle was 7 times to obtain dry particles; (4) 10 mL concentration The hydrochloric acid / ethanol solution that is 20mol / L steams in the dry granule gained in the step (3) in the form of steam, and steam enters speed 10mL / min, obtains the granule after steam fumigation; (5) the granule after steam fumigation is water Washing 3 times, fully drying, to obtain solid particles; ...

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Abstract

The invention discloses a preparation method of a polyolefin nanometer composite material. The method is characterized by comprising the following steps that 1, polyolefin particles are supplied; 2, after a precursor of an inorganic nanofiller and a solvent are mixed, the mixture is added into polyolefin particles to be dipped, and a mixed solution is obtained; 3, after the mixed solution is frozen, vacuum drying is performed, refrigerating and drying are performed again circularly for 5-20 times, and dried particles are obtained; 4, a hydrochloric acid / ethanol solution is steamed into the dried particles in a steam mode, and particles fumigated by steam are obtained; 5, the particles fumigated by steam are washed with water 1-5 times, and sufficient drying is performed to obtain solid particles; 6, the solid particles are stirred at the temperature of 120-260 DEG C and the speed of 10-300 rpm for 1-60 min, and forming is performed to obtain the polyolefin nanometer composite material.When the addition amount of the nanofiller is larger than 10% and smaller than 30%, the polyolefin nanometer composite material with the uniform nanofiller dispersion and excellent mechanical property can still be obtained.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method of a polyolefin nanocomposite material. Background technique [0002] Polyolefin nanocomposites are a kind of composite materials in which inorganic fillers are dispersed at the nanoscale inside the polyolefin matrix. They have excellent impact resistance, mechanical strength, friction and wear resistance, and are an important class of lightweight materials. However, due to the nano-size effect of nano-fillers, the fillers are very easy to agglomerate, which greatly reduces the mechanical properties of polyolefin nanocomposites. [0003] The preparation methods of polyolefin nanocomposites are mainly divided into two categories, namely physical blending method and chemical blending method. Nano fillers need to modify the fillers, such as surface alkylation, carbonylation, etc., or use compatibilizers. For example, the inve...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/12C08L47/00C08K3/22
CPCC08K3/22C08K2003/222C08K2003/2241C08K2201/011C08L23/06C08L23/12C08L47/00
Inventor 周琦
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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