Composite coating Ni-Ti alloy material with super-hydrophobic and super-oleophobic properties and preparing method thereof

A nickel-titanium alloy and composite coating technology is applied in the fields of super-amphiphobic materials and medical devices to prevent restenosis and inhibit vascular intimal hyperplasia.

Active Publication Date: 2019-09-27
SHANGHAI FIRST PEOPLES HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is currently no composite coating nickel-titanium alloy material with good superhydrophobic and oleophobic properties, super lubricating, effectively reducing intima hyperplasia, and good antibacterial effect.

Method used

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  • Composite coating Ni-Ti alloy material with super-hydrophobic and super-oleophobic properties and preparing method thereof
  • Composite coating Ni-Ti alloy material with super-hydrophobic and super-oleophobic properties and preparing method thereof
  • Composite coating Ni-Ti alloy material with super-hydrophobic and super-oleophobic properties and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 The preparation of the composite coating nickel-titanium alloy material with superhydrophobic and oleophobic properties of the present invention (1)

[0036] 1 Experimental materials

[0037] 1.1 Medical nickel-titanium memory alloy plate

[0038] The medical nickel-titanium memory alloy plate was purchased from Shenzhen Xinghequan New Material Co., Ltd., the nickel content was 55.8wt%, and the size was 5mm*5mm*10mm.

[0039] 1.2 cells

[0040] Smooth muscle cells were purchased from Shanghai Cell Institute, Chinese Academy of Sciences;

[0041] E.coli strains were purchased from Saiye (Guangzhou) Biotechnology Co., Ltd.

[0042] 1.3 Reagents

[0043] Acetone, absolute ethanol, hydrobromic acid, hydrochloric acid, and acetic acid were purchased from Shanghai Merck Reagent Company;

[0044] Linear low-density polyethylene (LLDPE) was purchased from U.S. Dow;

[0045] ZnO nanoparticles were purchased from Sigma Company.

[0046] 1.4 Instruments and equ...

Embodiment 2

[0083] Example 2 Preparation of the composite coating nickel-titanium alloy material with superhydrophobic and oleophobic properties of the present invention (2)

[0084] 1. Pretreatment of nickel-titanium alloy plate

[0085] The nickel-titanium alloy plate was soaked in acetone to degrease, and after taking it out, it was ultrasonically cleaned with absolute ethanol, and then deionized water was used for ultrasonic cleaning, and the cleaned nickel-titanium alloy plate was dried with high-pressure nitrogen. Put it into a clean and sealed container containing 0.3M HBr hydrobromic acid, 1.8M hydrochloric acid, and 2.5M acetic acid, put it in a dark place for 3 hours, take it out and put it into a container containing 1M HBr 2 SO 3 Place the solution in a clean and sealed container for 10 minutes, take it out, clean it ultrasonically with deionized water, and dry it with high-pressure nitrogen.

[0086] 2. Preparation of LLDPE-ZnO nickel-titanium alloy plate

[0087] Disperse...

Embodiment 3

[0091] Example 3 Preparation of the composite coating nickel-titanium alloy material with superhydrophobic and oleophobic properties of the present invention (3)

[0092] 1. Pretreatment of nickel-titanium alloy plate

[0093] The nickel-titanium alloy plate was soaked in acetone to degrease, and after taking it out, it was ultrasonically cleaned with absolute ethanol, and then deionized water was used for ultrasonic cleaning, and the cleaned nickel-titanium alloy plate was dried with high-pressure nitrogen. Put it into a clean and sealed container containing 0.2M HBr hydrobromic acid, 2.2M hydrochloric acid, and 2.5M acetic acid, put it in a dark place for 3.5 hours, take it out and put it into a container containing 0.5M HBr 2 SO 3 Place the solution in a clean and sealed container for 30 minutes, take it out, clean it ultrasonically with deionized water, and dry it with high-pressure nitrogen.

[0094] 2. Preparation of LLDPE-ZnO nickel-titanium alloy plate

[0095] Disp...

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Abstract

The invention relates to a composite coating Ni-Ti alloy material with super-hydrophobic and super-oleophobic properties and a preparing method thereof. The surface of the Ni-Ti alloy material is sequentially etched twice by using a mixed acid solution and a H2SO3 solution. Then, linear low-density polyethylene and ZnO nano particles are sprayed. Finally, low surface energy modification is carried out on the surface by using stearic acid. Contact angle test results show that the modified surface of the Ni-Ti alloy material has excellent super-hydrophobic and super-oleophobic properties, and adhesion experiment results show that the modified surface of the Ni-Ti alloy material has weak smooth muscle cell adhesion capability as well as weak bacterial colonization capability. Therefore, the composite coating Ni-Ti alloy material has unique advantages over the manufacture of implantable medical instruments, can effectively inhibit endovascular hyperplasia, prevent the occurring of vascular restenosis and inhibit bacterial colonization and growth.

Description

technical field [0001] The invention relates to the field of superamphiphobic materials and medical devices, in particular to a composite coating nickel-titanium alloy material with superhydrophobic and oleophobic properties and a preparation method thereof. Background technique [0002] Nickel-titanium alloy is widely used in the field of medical devices based on its unique superelasticity and shape memory effect. Nickel-titanium alloy vascular stents are widely used clinically, but they will not be absorbed by the body after being implanted in blood vessels and cannot be degraded. Stenosis, chronic inflammation, late and very late thrombosis and other problems. It is very important to improve the surface properties of Nitinol alloys and avoid the above complications. [0003] Surfaces with both water and oil contact angles greater than 150° are called superhydrophobic / oleophobic surfaces. Superhydrophobic / oleophobic is a special phenomenon on solid surfaces, which is ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D7/14B05D7/24A61L31/02A61L31/10A61L31/08A61L31/14C23F1/30
CPCA61L31/022A61L31/088A61L31/10A61L31/14A61L2400/18B05D5/00B05D7/14B05D7/24B05D2202/35B05D2507/01B05D2601/20C23F1/30C08L23/06
Inventor 张伟星王瑞兰宛新建杨莹黎金臻
Owner SHANGHAI FIRST PEOPLES HOSPITAL
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