Reduced graphene oxide reinforced zinc-based medical material and preparation method thereof

A graphene-zinc-based technology, applied in the field of reduced graphene oxide-enhanced zinc-based medical materials and their preparation, can solve problems such as insufficient mechanical properties, achieve excellent mechanical properties, meet application requirements for bone repair, and have a high solidification rate. Effect

Active Publication Date: 2019-08-23
JIANGXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the insufficient mechanical properties of existing zinc-based materials, the object of the present invention is to provide a reduced graphene oxide-enhanced zinc-based medical material and a preparation method thereof. On the one hand, the reduced graphite oxide with excellent mechanical properties is used On the other hand, using the characteristics of laser selective melting and rapid solidification, the rapid cooling of the tiny molten pool can be realized, so as to obtain a fine and uniform structure, and the mechanical properties of the zinc matrix can be further enhanced through fine grain strengthening.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The zinc powder and the reduced graphene oxide powder are prepared according to the mass ratio of 99.9:0.1, and then mixed by mechanical ball milling. The ball milling time is 4 hours, and the ball milling speed is 300r / min. The speed is 500mm / s, the spot diameter is 60μm, and the scanning distance is 50μm.

[0040] The scanning electron microscope observation found that the average grain size was 1.87μm, and the mechanical test found that the ultimate tensile strength reached 250Mpa.

Embodiment 2

[0042] The zinc powder and the reduced graphene oxide powder are mixed according to the mass ratio of 99.95:0.05, and then mixed by mechanical ball milling. The ball milling time is 4 hours, and the ball milling speed is 300r / min. 400mm / s, spot diameter 80μm, scanning distance 60μm.

[0043] The scanning electron microscope observation found that the average grain size was 2.79 μm, and the mechanical test found that the ultimate tensile strength reached 198Mpa.

Embodiment 3

[0045] The zinc powder and the reduced graphene oxide powder are mixed according to the mass ratio of 99.85:0.15, and then mixed by mechanical ball milling. The ball milling time is 4 hours, and the ball milling speed is 300r / min. 300mm / s, spot diameter 60μm, scanning distance 50μm.

[0046] The scanning electron microscope observation found that the average grain size was 2.38 μm, and the mechanical test found that the ultimate tensile strength reached 223Mpa.

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Abstract

The invention discloses a reduced graphene oxide reinforced zinc-based medical material. The reduced graphene oxide reinforced zinc-based medical material is composed of a zinc base body and reduced graphene oxide, wherein the mass percentage of the reduced graphene oxide accounts for 0.05-0.2% by weight. On one hand, the reduced graphene oxide excellent in mechanical performance is adopted as a second phase reinforced zinc base body; and on the other hand, the characteristics that selective laser melting can achieve fast solidification and the reduced graphene oxide is excellent in heat-conducting property are utilized, and a tiny molten pool can be cooled rapidly, so that a fine and uniform structure is obtained; and the mechanical performance of the zinc base body is further enhanced through refined crystalline strengthening.

Description

technical field [0001] The invention belongs to the technical field of biological materials, and in particular relates to a reduced graphene oxide reinforced zinc-based medical material and a preparation method thereof. Background technique [0002] Zinc metal is a very promising material for bone repair. First of all, zinc is one of the essential trace elements for the human body. It participates in the metabolic process of the human body in large quantities and has good biocompatibility. Secondly, zinc metal can degrade in the form of self-corrosion in the human environment (standard potential ~-0.76V), and the degradation rate matches the growth rate of bone tissue, showing unique advantages in biodegradation. However, the mechanical properties of zinc metal are insufficient to meet the application requirements of clinical bone repair, especially in load-bearing bone. [0003] Reduced graphene oxide has excellent mechanical properties, its fracture strength and elastic ...

Claims

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Application Information

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IPC IPC(8): C22C18/00C22C1/05C22C1/10B22F9/04B22F3/105
CPCC22C18/00C22C1/05B22F9/04B22F2009/043B22F10/00B22F10/34B22F10/28B22F10/36B22F10/366B22F10/32Y02P10/25
Inventor 帅词俊杨友文戚方伟彭淑平杨文静
Owner JIANGXI UNIV OF SCI & TECH
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