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Preparation method of medical 316L stainless steel with surface hydrophobicity fine nano-nano double structure

A stainless steel, hydrophobic technology, applied in the direction of anodic oxidation, metal material coating technology, etc., can solve the problems of difficulty in obtaining large-area uniform distribution of nanostructures, lack of biological activity and hydrophobicity, cumbersome and complicated process, etc., to achieve affinity and sparseness The effect of effective water-based transformation, simple and easy preparation method, and enhanced surface hydrophobicity

Inactive Publication Date: 2016-12-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its performance still has shortcomings, such as poor blood compatibility, lack of biological activity and hydrophobicity, etc.
However, in many existing methods, the preparation process either relies on expensive instruments and equipment, or the process is cumbersome and difficult to effectively control, and it is difficult to obtain large-area uniformly distributed nanostructures.
Moreover, due to the influence of the preparation method, the nano surface layer cannot be stably combined with the material matrix for a long time, which in turn causes the material function failure due to the peeling and separation of the surface layer structure.

Method used

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  • Preparation method of medical 316L stainless steel with surface hydrophobicity fine nano-nano double structure
  • Preparation method of medical 316L stainless steel with surface hydrophobicity fine nano-nano double structure
  • Preparation method of medical 316L stainless steel with surface hydrophobicity fine nano-nano double structure

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Preparation of nanopits on the surface of 316LSS: 316LSS was placed in a mixture of perchloric acid and ethylene glycol (V:V=1:19), anodized at 2°C and 50V for 7 minutes, and the diameter of the pits was 60nm.

[0037] (2) Construction of 316LSS hydrophobic surface: Corrode the above sample in 3mol / L hydrochloric acid for 6min, take out the sample, rinse it repeatedly with deionized water, and let it dry naturally.

[0038] (3) 316LSS hydrophobic surface modified heptadecafluorodecyltrimethoxysilane PTES: Add 29.7g of absolute ethanol to a beaker, drop 0.3g of PTES into the absolute ethanol drop by drop, complete this operation step on an electronic balance, PTES It should be added dropwise slowly to ensure the accuracy of the solution concentration. The prepared solution was placed on a magnetic stirrer and stirred for 3 hours to ensure the uniform dissolution of PTES in absolute ethanol. The 316LSS corroded by hydrochloric acid was placed in 1wt% PTES solution, s...

Embodiment 2

[0044] (1) Preparation of nanopits on the surface of 316LSS: 316LSS was placed in a mixture of perchloric acid and ethylene glycol with a volume ratio of 1:19, reacted in an ice bath, anodized at 50V for 7min, and the diameter of the pits was 60nm.

[0045](2) Construction of 316LSS hydrophobic surface: Corrode the above sample in 3mol / L hydrochloric acid for 4min, take out the sample, rinse repeatedly with deionized water, and dry naturally.

[0046] (3) 316LSS hydrophobic surface modified PTES: Slowly drop 0.25g PTES into 24.75g absolute ethanol drop by drop to ensure the accuracy of the solution concentration. The prepared solution was stirred for 3 hours to ensure the uniform dissolution of PTES in absolute ethanol. The 316LSS corroded by hydrochloric acid was placed in 1wt% PTES solution, soaked at room temperature for 24 hours, and then heat-treated at 140 °C for 100 min at a heating rate of 2 °C / min to prepare PTES / 316LSS.

[0047] (4) Measure the surface contact angle...

Embodiment 3

[0049] (1) Preparation of nanopits on the surface of 316LSS: 316LSS was placed in a mixture of perchloric acid and ethylene glycol (V:V=1:19), anodized at 2°C and 50V for 7 minutes, and the diameter of the pits was 60nm.

[0050] (2) Construction of 316LSS hydrophobic surface: Corrode the above sample in 3mol / L hydrochloric acid for 8min, take out the sample, rinse repeatedly with deionized water, and dry at room temperature.

[0051] (3) 316LSS hydrophobic surface modified PTES: Slowly drop 0.25g PTES into 24.75g absolute ethanol drop by drop. To ensure the accuracy of the solution concentration, this operation step is completed on an electronic balance. The mixed solution was magnetically stirred for 3 h to ensure the uniform dissolution of PTES in absolute ethanol. The 316LSS corroded by hydrochloric acid was placed in a 1wt% PTES solution, soaked at room temperature for 24 hours, and then heat-treated at 140 °C for 100 min at a heating rate of 4 °C / min to prepare PTES / 316L...

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Abstract

The invention relates to a preparation method of medical 316L stainless steel with a surface hydrophobicity fine nano-nano double structure. The preparation method comprises the steps of carrying out electrochemical anodic oxidation on the medical 316L stainless steel to obtain the 316LSS with a nano-hollow array on the surface; corroding the 316LSS with the nano-hollow array in hydrochloric acid for 2 to 8min, washing, drying, and forming a granule structure in the nano-hollow array; and putting the 316LSS into an ethanol solution of heptadecafluorodecyl trimethoxy-silane, standing and soaking, and heat treating to obtain the medical 316L stainless steel with the surface hydrophobicity fine nano-nano double structure. The method provided by the invention is low in cost, easy to operate, and high in efficiency; and the nano-nano double structure with uniform distribution, coexisting scale dimensions, and effective alteration of hydrophilicity / hydrophobicity can be obtained on the surface of the 316LSS.

Description

technical field [0001] The invention belongs to the field of surface modification of medical 316L stainless steel, in particular to a preparation method of medical 316L stainless steel with surface hydrophobic fine nano-nano double structure. Background technique [0002] The biocompatibility and activity of biomaterials are closely related to the microstructure of their surfaces. The purposeful introduction of surface structures with special properties on the surface of materials plays a key role in the integration of implants and human tissues. With the continuous advancement of surface microfabrication technology, people have been able to build microstructures or nanostructures of different scales on the surface of materials, thus endowing the materials themselves with more ideal biological properties. [0003] In addition, hydrophilicity / hydrophobicity, as an important physical and chemical characteristic of the material surface, can participate in the regulation of pro...

Claims

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Application Information

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IPC IPC(8): C23C22/02C23F1/28C25D11/34
CPCC25D11/34C23C22/02C23C2222/20C23F1/28
Inventor 倪似愚刘玉昆杨朋安梅琳
Owner DONGHUA UNIV