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Preparation method for graphene/polyvinyl chloride composite material

A composite material and polyvinyl chloride technology, which is applied in the field of graphene/polyvinyl chloride composite material preparation, can solve problems such as polyvinyl chloride compatibility problems, and achieves overcoming uneven dispersion of graphene, simple and reasonable technological process, The effect of solving the problem of affinity

Active Publication Date: 2014-05-21
XIAMEN KNANO GRAPHENE TECH CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patented graphene is difficult to bond with the substrate material during the polymerization process, so there is a compatibility problem with polyvinyl chloride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Anchoring of azo initiators on graphene surface

[0028] Add 50g of graphene and 5000ml of deionized water into the reaction kettle, add sodium hydroxide to adjust the pH to 10, add 2g of 2,2′-azobisisobutylamidine dihydrogen chloride (AIBA), stir for 2 hours, wash and dry in vacuum , to obtain the graphene anchored by the azo initiator, and refrigerated under dark conditions.

[0029] (2) Preparation of graphene emulsion

[0030] Add 1g hydroxypropyl methylcellulose, 1000ml deionized water, 0.5g sodium dodecylbenzenesulfonate in the preparation tank, and start the high-speed mixer in the preparation tank. After stirring at high speed for 30 minutes, add 10 g of graphene anchored on the surface of the azo initiator, stir until there is no graphene powder on the surface, then start the emulsifier for emulsification. Then slowly raise the temperature to 70°C at a rate of 0.5°C / min, add a defoamer, and maintain emulsification for 2 hours.

[0031] (3) Preparation of...

Embodiment 2

[0036] (1) Anchoring of azo initiators on graphene surface

[0037] Add 50g of graphene oxide and 5000ml of deionized water into the reaction kettle, add sodium hydroxide to adjust the pH to 10, add 2g of 2,2′-azobisisobutylamidine dihydrochloride (AIBA), stir for 2 hours, wash, vacuum Dry to obtain graphene oxide anchored by an azo initiator, and refrigerate under dark conditions.

[0038] (2) Preparation of graphene emulsion

[0039] Add 2g hydroxypropyl methylcellulose, 1000ml deionized water, 0.5g sodium lauryl sulfate in the preparation tank, and start the high-speed mixer in the preparation tank. After stirring at high speed for 30 minutes, add 15 g of graphene oxide anchored on the surface of the azo initiator, stir until there is no graphene oxide powder on the surface, then start the emulsifier for emulsification. Then slowly raise the temperature to 70°C at a rate of 0.5°C / min, add a defoamer, and maintain emulsification for 4 hours.

[0040] (3) Preparation of gr...

Embodiment 3

[0045] (1) Anchoring of azo initiators on graphene surface

[0046] Add 50g of graphene and 5000ml of deionized water into the reaction kettle, add sodium hydroxide to adjust the pH to 10, add 2g of 2,2′-azobisisobutylamidine dihydrogen chloride (AIBA), stir for 2 hours, wash and dry in vacuum , to obtain the graphene anchored by the azo initiator, and refrigerated under dark conditions.

[0047] (2) Preparation of graphene emulsion

[0048] Add 1g of hydroxypropyl methylcellulose, 0.5g of polyvinyl alcohol, 1000ml of deionized water, and 1g of sodium cetylbenzenesulfonate into the preparation tank, and start the high-speed mixer in the preparation tank. After stirring at high speed for 30 minutes, add 20 g of graphene anchored to the surface of the azo initiator, stir until there is no graphene powder on the surface, then start the emulsifier for emulsification. Then slowly raise the temperature to 70°C at a rate of 0.5°C / min, add defoamer, and maintain emulsification for 2...

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Abstract

The invention discloses a preparation method for a graphene / polyvinyl chloride composite material. The preparation method comprises the following steps of (1) anchoring an azo initiator on the surface of graphene through electrostatic adsorption; (2) preparing graphene emulsion, namely cooperatively dispersing and stabilizing the graphene under mutual action caused by molecular structures of a dispersing agent and an emulsifier, so as to obtain uniformly dispersed graphene emulsion through a high-speed stirrer; (3) initiating polymerization on the surface of the graphene by adopting an in-situ polymerization method to generate polyvinyl chloride, and preparing a polyvinyl chloride-cladded graphene composite material; and (4) post-treating graphene / polyvinyl chloride resin slurry. According to the preparation method, the process is simple; under the complexing cooperation action of in-situ anchoring modification and a surfactant, the compatibility of a graphite powder body and the polyvinyl chloride is improved from multiple aspects, so that the composite material with the high performance is obtained; the preparation method can be widely applied to materials such as building materials, packaging materials and medical materials, and the graphene / polyvinyl chloride composite material can be used as a novel upgrading replacement product for a conventional composite material.

Description

technical field [0001] The invention belongs to the technical field of nanometer polymer composite materials, in particular to a preparation method of graphene / polyvinyl chloride composite materials. Background technique [0002] Polyvinyl chloride (PVC) has excellent comprehensive properties such as good mechanical properties, electrical properties, corrosion resistance, flame retardancy, etc., and its low price and wide source of raw materials, so it has been widely used in chemical building materials and other fields. PVC is a general-purpose resin with a wide range of uses. However, its application is limited to a certain extent due to its high melt viscosity, poor impact resistance, and poor thermal stability. Therefore, the modification of polyvinyl chloride has attracted the attention of many researchers. The traditional way to modify PVC is to add elastomers, such as acrylic copolymers, thermoplastic polyurethanes, nitrile rubber, and thermoplastic resins. The addi...

Claims

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Application Information

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IPC IPC(8): C08F114/06C08F2/20C08K9/04C08K3/04
Inventor 洪江彬邱淑璇江龙迎钱文枝赵立平方崇卿
Owner XIAMEN KNANO GRAPHENE TECH CORP
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