Cross-linkable inorganic nano-LDPE (low-density polyethylene)/SiOx polymer composite material and preparation method thereof

A composite material and inorganic nanotechnology, which is applied in the field of inorganic nano-LDPE/SiOx polymer composite materials and their preparation, can solve the problems of difficult to realize industrialization, complicated preparation, inability to prepare nano-composite materials, etc. The effect of improving electrical properties and elongation at break

Active Publication Date: 2013-09-25
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation is complicated, and cross-linkable nanocomposites cannot be prepared, and it is not easy to realize industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take by weighing 192gLDPE, 10g solid content 20% organosilicon sol (actual solid SiO x Accounting for the mass percentage of the whole composite material 1.0%), 0.6g main antioxidant, 1.4g auxiliary antioxidant are mixed uniformly in the mixer; After single-screw exhaust, cooling, and granulation into nanocomposite particles; mix the composite with 4g of crosslinking agent in a mixer at 80°C for 30min to make crosslinkable SiO x / LDPE nano cable material is sample 1.

[0018] to add 50nm SiO 2 Inorganic nano-SiOx / LDPE and LDPE were used to prepare cross-linkable cable materials as a control. Weigh 192g LDPE, 2g 50nm SiO2 inorganic nano-SiOx / LDPE, 0.6g primary antioxidant, 1.4g auxiliary antioxidant and mix them uniformly in the mixer; Afterwards, single-screw exhaust, cooling, and granulation into nanocomposite particles; the composite material is mixed with 4g of crosslinking agent in a mixer at 80°C for 30min to make crosslinkable SiO 2 / LDPE nano cable materi...

Embodiment 2

[0030] Take by weighing 191gLDPE, 15g solid content 20% organosilicon sol (actual solid SiO xAccounting for 1.5% of the mass percentage of the whole composite material), 0.6g main antioxidant and 1.4g auxiliary antioxidant are mixed uniformly in the mixer; After single-screw exhaust, cooling, and granulation into nanocomposite particles; mix the composite with 4g of crosslinking agent in a mixer at 80°C for 30min to make crosslinkable SiO x / LDPE nano cable material is sample 4.

[0031] to add 50nm SiO 2 Inorganic nano-SiOx / LDPE and LDPE were used to prepare cross-linkable cable materials as a control. Weigh 192g LDPE, 3g 50nm SiO2 inorganic nano-SiOx / LDPE, 0.6g primary antioxidant, 1.4g auxiliary antioxidant and mix them uniformly in the mixer; Afterwards, single-screw exhaust, cooling, and granulation into nanocomposite particles; the composite material is mixed with 4g of crosslinking agent in a mixer at 80°C for 30min to make crosslinkable SiO 2 / LDPE nano cable m...

Embodiment 3

[0043] Take by weighing 190gLDPE, 20g solid content 20% organosilicon sol (actual solid SiO x Accounting for 1.5% of the mass percentage of the whole composite material), 0.6g main antioxidant and 1.4g auxiliary antioxidant are mixed uniformly in the mixer; After single-screw exhaust, cooling, and granulation into nanocomposite particles; mix the composite with 4g of crosslinking agent in a mixer at 80°C for 30min to make crosslinkable SiO x / LDPE nano cable material is sample 6.

[0044] to add 50nm SiO 2 Inorganic nano-SiOx / LDPE and LDPE were used to prepare cross-linkable cable materials as a control. Weigh 190g LDPE, 4g 50nm SiO2 inorganic nano-SiOx / LDPE, 0.6g primary antioxidant, 1.4g auxiliary antioxidant and mix them uniformly in the mixer; Afterwards, single-screw exhaust, cooling, and granulation into nanocomposite particles; the composite material is mixed with 4g of crosslinking agent in a mixer at 80°C for 30min to make crosslinkable SiO 2 / LDPE nano cable ...

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Abstract

The invention relates to a cross-linkable inorganic nano-LDPE (low-density polyethylene) / SiOx polymer composite material and a preparation method thereof. The cross-linkable inorganic nano-LDPE / SiOx polymer composite material comprises organic silicon sol, low-density polyethylene, a main antioxidant, an auxiliary antioxidant and a cross-linking agent, wherein the organic silicon sol is ethylene glycol silicon sol, the main antioxidant is pentaerythrite tetra (beta-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate), the auxiliary antioxidant is dilauryl thiodipropionate, and the cross-linking agent is dicumyl peroxide. The preparation method disclosed by the invention can solve the problems of poor dispersibility, serious particle agglomeration and the like of the existing preparation method of a polyolefin nano-composite material, a solvent-melt blending method is adopted for successfully preparing a cross-linkable SiOx / LDPE nano-cable material with the SiOx particle size of 55nm-100nm, the agglomeration of inorganic particles is effectively prevented, and the cross-linkable SiOx / LDPE nano-cable material is obviously better than a cross-linkable SiO2 / LDPE nano-cable material as a control material.

Description

technical field [0001] The invention relates to the technical field of polymer inorganic nanocomposite materials, in particular to a crosslinkable inorganic nanometer LDPE / SiOx polymer composite material and a preparation method thereof. Background technique [0002] Compared with polyethylene, cross-linkable polyethylene nanocomposites have excellent electrical properties (such as high breakdown field strength and high volume resistivity) and mechanical properties, and have become one of the research hotspots in the field of wire and cable materials. However, the interfacial energy of inorganic nanoparticles and polyethylene is very different, the compatibility is poor, and secondary agglomeration is easy to occur. Moreover, the decomposition of crosslinking agent and crosslinking are easily caused when mixed at high temperature and molten state, so it is difficult to prepare nanoscale dispersions. The cross-linkable polyethylene nanocomposites cannot improve the electrical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K13/02C08K3/34C08J3/24
Inventor 张文龙戴亚杰
Owner HARBIN UNIV OF SCI & TECH
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