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A kind of reduced graphene oxide reinforced zinc-based medical material and preparation method thereof

A graphene and graphene powder 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, and achieve the effects of excellent mechanical properties, high solidification rate, and high thermal conductivity

Active Publication Date: 2021-06-25
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 mixed 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 zinc-based medical material reinforced by reduced graphene oxide, which is composed of a zinc matrix and reduced graphene oxide, wherein the mass percentage of the reduced graphene oxide is 0.05-0.2 wt%. On the one hand, reduced graphene oxide with excellent mechanical properties is used as the second phase to strengthen the zinc matrix; on the other hand, the characteristics of rapid solidification of laser selective melting and the excellent thermal conductivity of reduced graphene oxide are used to achieve rapid cooling of tiny molten pools , so as to obtain a fine and uniform structure, and further enhance the mechanical properties of the zinc matrix through fine-grain 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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Patent Type & Authority Patents(China)
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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