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Controllable cross-linked natural rubber with graphene oxide reduced and modified by one-step method and preparation method of controllable cross-linked natural rubber

A technology of natural rubber and graphene, which is applied in the field of controllable cross-linked natural rubber and its simplified preparation process, can solve the problems of environmental protection and complex process, and achieve the effect of simple process, simple preparation process and improved thermal conductivity

Inactive Publication Date: 2022-07-01
ZHONGBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current process of using sulfur-containing compounds as graphene oxide reducing agents and modifiers needs to be dissolved in organic solvents, which has problems such as complex processes and not being environmentally friendly.

Method used

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  • Controllable cross-linked natural rubber with graphene oxide reduced and modified by one-step method and preparation method of controllable cross-linked natural rubber
  • Controllable cross-linked natural rubber with graphene oxide reduced and modified by one-step method and preparation method of controllable cross-linked natural rubber
  • Controllable cross-linked natural rubber with graphene oxide reduced and modified by one-step method and preparation method of controllable cross-linked natural rubber

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preparation example Construction

[0042] The preparation process of the sulfide-modified reduced graphene oxide comprises the following steps:

[0043] The aqueous solution of water-soluble sulfide is slowly added dropwise to the graphene oxide aqueous dispersion, reacted at a certain temperature for a certain period of time, and then cooled to room temperature naturally to obtain a sulfide-modified reduced graphene oxide aqueous dispersion.

[0044] In an embodiment provided by the present invention, the mass ratio of the water-soluble sulfide to graphene oxide is 1-5:1.

[0045] In another embodiment provided by the present invention, the temperature of the reaction is 60-100°C, and the reaction time is 30min-5h.

[0046] In the present invention, the preferred water-soluble sulfide used is 2-mercapto-1-methylimidazole.

[0047] Further preferably, the concentration of the graphene oxide aqueous dispersion is 0.5-1wt%.

[0048] Further preferably, the rubber additives include antioxidants, antioxidants, ac...

Embodiment 1-5

[0083] Examples 1-5: NR / MMI-GO composites of the present invention

[0084] (1) First, prepare a graphene oxide aqueous dispersion with a solid content of 1%; then, weigh according to the mass ratio of graphene oxide and water-soluble sulfide 2-mercapto-1-methylimidazole (MMI) 1:2 MMI was dissolved in deionized water to prepare a solution of 20 g / L; the prepared aqueous solution of water-soluble sulfide was slowly added dropwise to the graphene oxide aqueous dispersion, reacted at 80 °C for 90 min, and then cooled to room temperature naturally to obtain Sulfide-modified reduced graphene oxide aqueous dispersion.

[0085] (2) adding the sulfide-modified reduced graphene oxide aqueous dispersion prepared in step (1) into a natural latex with a solid content of 50 g according to a certain mass ratio and mixing evenly, adding calcium chloride solution to completely flocculate the emulsion; washing with water After removing calcium chloride, drying at 80°C to constant weight to obta...

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Abstract

The invention belongs to the field of preparation of rubber composite materials of graphene, and particularly relates to a green and efficient controllable cross-linked natural rubber with graphene oxide reduced and modified by a one-step method and a simplified preparation process of the natural rubber. The preparation method comprises the following steps: reducing and organically modifying graphene oxide with sulfide by adopting a green and efficient one-step method, and then adding an obtained sulfide modified reduced graphene oxide dispersion liquid into natural latex; graphene masterbatch is prepared by using a water-phase synergistic coagulation process; and finally, the controllable cross-linked graphene modified natural rubber composite material which takes sulfide loaded on reduced graphene oxide as a main cross-linking point and has excellent performance is prepared. The modified reduced graphene oxide particles prepared by the method can effectively improve the crosslinking density and the binding rubber content of a natural rubber filled composite material, so that the heat-conducting property, the mechanical property and the wear resistance of a natural rubber product are improved.

Description

technical field [0001] The invention belongs to the field of graphene rubber composite material preparation, in particular to a controllable cross-linked natural rubber for reducing and modifying graphene oxide by a green and efficient one-step method and a simplified preparation process thereof. Background technique [0002] Natural rubber is readily available, inexpensive, and has excellent high elasticity and insulating properties. In particular, its typical self-reinforcing properties make natural rubber an indispensable matrix material, which is widely used in engineering tire manufacturing. However, natural rubber is a polymer material. Under the action of long-term dynamic stress, its unique viscoelasticity produces a hysteresis phenomenon, which causes the material to convert the mechanical energy it receives into internal heat, resulting in a reduction in the performance of the rubber and eventually failure. In order to improve the comprehensive properties of natura...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K9/04C08K9/12C08K3/04C08K5/378
CPCC08K9/04C08K9/12C08K3/042C08K5/378C08L7/00
Inventor 贺日臻刘亚青崔怡文张志毅安东赵贵哲
Owner ZHONGBEI UNIV