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Synthetic method for carbon nanotube/carbon black compound modified styrene resin

A technology of polystyrene resin and carbon nanotubes, which is applied in the field of thermal insulation, can solve the problems of carbon nanotubes and carbon black not being able to achieve the best dispersion and high thermal conductivity, and achieve excellent light absorption and anti-light aging performance, Effect of reducing thermal conductivity and improving thermal resistance of eco-efficiency

Active Publication Date: 2017-05-03
河北五洲开元环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The dispersibility of carbon nanotubes and carbon black in the existing XPS can not reach the best. Although the direction of heat conduction can be changed, it can only reduce energy loss to a certain extent, and the high thermal conductivity is not conducive to practical use. Material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prepare raw materials according to the following weight ratio: styrene 86g, glycidyl methacrylate 5g, acryloyl chloride 5g, carbon nanotubes 2g, carbon black 2g, 1,4-dioxane 50ml, azobisisobutyronitrile 0.1 g. Concentrated sulfuric acid 60ml, concentrated nitric acid 180ml, deionized water 200ml.

[0035] a) The carbon nanotubes were added into a mixed solution of concentrated sulfuric acid and concentrated nitric acid, ultrasonically treated for 1 h, washed with deionized water until neutral, and dried in an oven at 60°C for 24 h for later use.

[0036] b) Mix carbon black and sulfuric acid solution in a three-necked flask, and react at 60°C for 6h. The reaction product was filtered, washed with distilled water until the filtrate was neutral, and then placed in a constant temperature drying oven to dry for later use.

[0037]c) Weigh the initiator, generally 0.1g of azobisisobutylcyanide, and put it into a round bottom flask filled with nitrogen; add 1,4 dioxane, styr...

Embodiment 2

[0043] Prepare raw materials according to the following weight ratio: styrene 85g, glycidyl methacrylate 5g, acryloyl chloride 5g, carbon nanotubes 2.5g, carbon black 2.5g, 1,4-dioxane 50ml, azobisisobutyl Cyanide 0.2g, concentrated sulfuric acid 60ml, concentrated nitric acid 180ml, deionized water 200ml.

[0044] a) The carbon nanotubes were added into a mixed solution of concentrated sulfuric acid and concentrated nitric acid, ultrasonically treated for 1 h, washed with deionized water until neutral, and dried in an oven at 60°C for 24 h for later use.

[0045] b) Mix carbon black and sulfuric acid solution in a three-necked flask, and react at 60 °C for 8 hours. The reaction product was filtered, washed with distilled water until the filtrate was neutral, and then placed in a constant temperature drying oven to dry for later use.

[0046] c) Weigh the initiator, generally 0.1g azobisisobutylcyanide, put it into a round bottom flask filled with nitrogen, add 1,4 dioxane, s...

Embodiment 3

[0052] Prepare raw materials according to the following weight ratio: styrene 82g, glycidyl methacrylate 6g, acryloyl chloride 6g, carbon nanotube 3g, carbon black 3g, 1,4-dioxane 50ml, azobisisobutyrocyanide 0.5 g, concentrated sulfuric acid 80ml, concentrated nitric acid 200ml, deionized water 200ml.

[0053] a) The carbon nanotubes were added into a mixed solution of concentrated sulfuric acid and concentrated nitric acid, ultrasonically treated for 1 h, washed with deionized water until neutral, and dried in an oven at 60°C for 24 h for later use.

[0054] b) Mix carbon black and sulfuric acid solution in a three-necked flask, and react at 60°C for 6h. The reaction product was filtered, washed with distilled water until the filtrate was neutral, and then placed in a constant temperature drying oven to dry for later use.

[0055] c) Weigh the initiator, generally 0.1g azobisisobutylcyanide, put it into a round bottom flask filled with nitrogen, add 1,4 dioxane, styrene and...

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Abstract

The invention provides a synthetic method for carbon nanotube / carbon black compound modified styrene resin. According to the invention, a styrene- acryloyl chloride-glycidyl methacrylate copolymer is used as an interfacial cross-linking modifier for preparation of hybrid cross-linking particles from carbon nanotubes and carbon black so as to achieve the purpose of hybridization of rod-like carbon nanotubes and granular carbon black; and the hybrid cross-linking particles are added during bulk polymerization of styrene, so the carbon nanotube / carbon black compound modified styrene resin is prepared. The carbon nanotube / carbon black compound modified styrene resin is applied to plastic extrusion of polystyrene foam XPS. The synthetic method is simple, easy to operate and low in cost. The dispersity of carbon nanotubes / carbon black in the prepared resin is good; XPS prepared from the resin has a low heat conduction coefficient and high thermal resistance; and when the total addition amount of the carbon nanotubes and carbon black is 6%, XPS prepared from the obtained resin has a heat conduction coefficient of 0.023 to 0.027 W / (m.K).

Description

technical field [0001] The invention relates to modifying carbon nanotube / carbon black hybrid cross-linked particles to prepare polystyrene resin material through bulk polymerization, which is used in the field of thermal insulation. Background technique [0002] XPS is an extruded polystyrene heat insulation board. It is a rigid foam made of polystyrene resin as raw material plus other auxiliary materials and polymers. It is heated and mixed while injecting a catalyst, and then extruded. Plastic plates. XPS has a perfect closed-cell honeycomb structure, which has the characteristics of high thermal resistance, low linearity and low expansion ratio. The closed-cell rate of its structure has reached more than 99%, forming a vacuum layer to avoid air flow and heat dissipation, ensuring its long-lasting and stable thermal insulation performance. Stablize. This structural feature endows it with extremely low water absorption (almost no water absorption), low thermal conductivi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/14C08K9/02C08K7/24C08K3/04
Inventor 刘明
Owner 河北五洲开元环保新材料有限公司
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