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Organic-inorganic nanocomposite reinforced polyethylene material and preparation method thereof

An inorganic nano-composite reinforcement technology, applied in the field of polyethylene materials and preparation, can solve the problems of inability to achieve long-term anti-violet, polyethylene matrix performance damage, and inability to eliminate polyethylene matrix damage, so as to achieve easy industrial preparation and low production cost. Low, reasonable composition of the effect

Active Publication Date: 2019-03-26
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this polyethylene composition has good anti-ultraviolet aging ability, puncture resistance and higher physical and mechanical strength, there are still deficiencies. First, the added antioxidant and ultraviolet absorber are based on sacrificing themselves. The price is to avoid the infringement of ultraviolet rays on the polyethylene matrix. Once it is consumed, the performance of the polyethylene matrix will be destroyed quickly, and the purpose of long-term anti-violet cannot be achieved; Eliminate the damage of ultraviolet rays to the polyethylene matrix. If the amount added is too large, it will seriously affect the processing performance of the product

Method used

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  • Organic-inorganic nanocomposite reinforced polyethylene material and preparation method thereof
  • Organic-inorganic nanocomposite reinforced polyethylene material and preparation method thereof
  • Organic-inorganic nanocomposite reinforced polyethylene material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The concrete steps of preparation are:

[0045] Step 1, first mix sulfuric acid ≥ 96wt% and nitric acid ≥ 63wt% according to the weight ratio of 1:1 to obtain mixed acid. According to the weight ratio of 1:10, the carbon nanotubes were placed in a mixed acid at 50°C and stirred for 12 hours, and the reaction solution was sequentially subjected to solid-liquid separation, washing and drying; wherein the carbon nanotubes were multi-wall For carbon nanotubes, the solid-liquid separation treatment is filtration, the washing treatment is to use deionized water to wash and filter the solid matter until the washing liquid is neutral, and the drying treatment is to dry the washed solid matter at 50°C for 48 hours to obtain purified carbon nanotube.

[0046] Step 2, first add the purified carbon nanotubes to a 10wt% surface modifier solution, stir and react at 70°C for 37h and then dry; wherein, the weight of the purified carbon nanotubes and the surface modifier in the surface...

Embodiment 2

[0048] The concrete steps of preparation are:

[0049] Step 1, first mix sulfuric acid ≥ 96wt% and nitric acid ≥ 63wt% according to the weight ratio of 1:1.5 to obtain mixed acid. According to the weight ratio of 2:10, the carbon nanotubes were placed in a mixed acid at 55°C and stirred for 11 hours, and the reaction solution was sequentially subjected to solid-liquid separation, washing and drying; wherein the carbon nanotubes were multi-wall For carbon nanotubes, the solid-liquid separation treatment is filtration, the washing treatment is to wash and filter the solid matter with deionized water until the washing liquid is neutral, and the drying treatment is to dry the washed solid matter at 55°C for 48 hours to obtain purified carbon nanotube.

[0050] Step 2, first add the purified carbon nanotubes to a 20wt% surface modifier solution, stir and react at 75°C for 36 hours and then dry; wherein, the weight of the purified carbon nanotubes and the surface modifier in the su...

Embodiment 3

[0052] The concrete steps of preparation are:

[0053] Step 1, first mix sulfuric acid ≥ 96wt% and nitric acid ≥ 63wt% according to the weight ratio of 1:2 to obtain the mixed acid. According to the weight ratio of 3:10, the carbon nanotubes were placed in a mixed acid at 60°C for 10 hours of stirring reaction, and the reaction solution was sequentially subjected to solid-liquid separation, washing and drying; wherein the carbon nanotubes were multi-walled For carbon nanotubes, the solid-liquid separation process is filtration, the washing process is to use deionized water to wash and filter the solid matter until the washing liquid is neutral, and the drying process is to dry the washed solid matter at 60°C for 48 hours to obtain purified carbon nanotube.

[0054] Step 2, first add the purified carbon nanotubes to a 30wt% surface modifier solution, and then dry them after stirring and reacting for 35 hours at 80°C; wherein, the weight of the purified carbon nanotubes and the...

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Abstract

The invention discloses an organic-inorganic nano-composite reinforced polyethylene material and a preparation method thereof. The material is composed of 5-20wt% of rutile type titanium dioxide micrometer particles, 0.5-30wt% of modified carbon nanotubes, 0.5-2wt% of an antioxidant, 0.1-5wt% of an organic UV absorbent and the balance high density polyethylene. The preparation method consists of: firstly mixing sulfuric acid with nitric acid, then placing carbon nanotubes in the mixed acid to carry out stirring reaction, then performing solid-liquid separation, washing and drying treatment, then adding the obtained purified carbon nanotubes into a surface modifier solution to carry out reaction, and then performing drying to obtain modified carbon nanotubes, and then putting the rutile type titanium dioxide micrometer particles, the modified carbon nanotubes, the antioxidant, the organic UV absorbent and the high density polyethylene in a twin-screw extruder to conduct melt blending, and then performing extrusion, thus obtaining the target product. With high long-acting ultraviolet resistance, the organic-inorganic nano-composite reinforced polyethylene material can be widely used as films, pipes, wires and cables, plastic products and packaging materials under outdoor natural conditions.

Description

technical field [0001] The invention relates to a polyethylene material and a preparation method, in particular to an organic-inorganic nanocomposite reinforced polyethylene material and a preparation method thereof. Background technique [0002] As one of the five general-purpose plastics, polyethylene is a thermoplastic polymer material with high molecular weight, low degree of branching, and excellent mechanical properties. It also has excellent electrical insulation, low temperature resistance, easy processing and excellent moldability. Chemical stability and dielectric properties have been widely used in the production of films, pipes, wires and cables, plastic products and packaging materials, and can be used as high-frequency insulation materials for TVs and radars. However, polyethylene materials, like most organic compounds, will age and change color under natural outdoor conditions due to external environmental factors such as solar ultraviolet light, heat, oxygen,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K13/06C08K9/04C08K9/06C08K7/24C08K3/22C08K5/134C08K5/526C08K5/3475C08K5/3462
CPCC08K3/22C08K5/1345C08K5/3462C08K5/3475C08K5/526C08K7/24C08K9/04C08K9/06C08K13/06C08K2003/2241C08L2207/062C08L23/06
Inventor 郑康郑周包超邓凡和胡坤冯士芬陈林张献田兴友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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