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Medical functional coating applying method and application

A coating method and coating technology, which is applied in the direction of surface coating liquid devices, coatings, special surfaces, etc., can solve the problems of attenuation, return to untreated, a few minutes at a short time, and a day or two at a long time , to achieve enhanced chemical bonding, controllable thickness, and firm adhesion

Pending Publication Date: 2019-04-16
INST OF MEDICAL DEVICES (SUZHOU) SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aging phenomenon of plasma surface treatment is well known to those skilled in the art, that is, after plasma treatment, the number of new groups and surface energy obtained on the surface of most substrates will obviously occur in a relatively short period of time. Attenuation, or even returning to the untreated state, this time is as short as a few minutes, as long as a day or two, and this is not possible in the manufacture of GMP (Good Manufacturing Practice, Good Manufacturing Practice) level products with high quality control requirements. tolerant

Method used

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  • Medical functional coating applying method and application
  • Medical functional coating applying method and application
  • Medical functional coating applying method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This embodiment relates to a titanium alloy internal fixation piece with an antibacterial coating, wherein the coating steps of the antibacterial coating are as follows:

[0042] 1) Put the titanium alloy internal fixation parts into an ultrasonic cleaning machine, wash them with acetone, ethanol, and water as cleaning liquids for 20 minutes each time, and then put the titanium alloy internal bone fixation parts into a blast drying oven to dry stand-by;

[0043] 2) Put the dried titanium alloy internal fixation into a vacuum plasma machine for plasma surface pretreatment; plasma surface pretreatment is carried out in two steps, the gas system used in the first step is carbon tetrafluoride and oxygen , The gas flow ratio is 1:2, the gas system used in the second step is oxygen, tetrahydrofuran and water, the gas flow ratio is 1:2:2, and the total treatment is 3 minutes;

[0044] 3) After breaking the vacuum, expose the titanium alloy internal fixation piece to the air a...

Embodiment 2

[0052] This embodiment relates to a medical syringe with a low-resistance coating, wherein the coating steps of the low-resistance coating are as follows:

[0053] 1) Take a 5ml polypropylene medical syringe in aseptic packaging, remove the needle and core rod piston, and then put it into a vacuum plasma machine for plasma surface pretreatment; plasma surface pretreatment is carried out in two steps, the first step uses The gas system is carbon tetrafluoride and oxygen, the gas flow ratio is 1:2, the gas system used in the second step is ethylene glycol dimethyl ether, oxygen and auxiliary gas ammonia, the gas flow ratio is 1:4:1 , a total of 5min;

[0054] 2) After breaking the vacuum, expose the medical syringe to the air at room temperature for two days, and then spray polysilazane solution on it; the polysilazane solution includes a coating substrate and a solvent, wherein the coating substrate is nanometer Inorganic polysilazane physically mixed and modified by silicon d...

Embodiment 3

[0062] This embodiment relates to a silicone catheter with a hydrophilic super slippery coating, wherein the coating steps of the hydrophilic super slippery coating are as follows:

[0063] 1) Take the aseptically packaged silicone catheter and put it directly into a vacuum plasma machine for plasma surface pretreatment; the plasma surface pretreatment is carried out in two steps, and the gas system used in the first step is octafluoropropane and carbon dioxide , The gas flow ratio is 1:6, the gas system used in the second step is butadiene, carbon dioxide and auxiliary gas argon, the gas flow ratio is 1:3:1, and the total treatment is 5 minutes;

[0064] 2) After breaking the vacuum, expose the silicone catheter to the air at room temperature for two days, and then dip-coat it with a polysilazane solution; the polysilazane solution includes a coating substrate and a solvent, wherein the coating substrate It is a mixed solution of vinyl modified polysilazane, silane coupling a...

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Abstract

The invention discloses a medical functional coating applying method and application, and relates to the technical field of functional materials. The medical functional coating applying method comprises the steps that surface pretreatment is conducted, two steps are divided, mixed gas of fluorine-carbon gas and inorganic oxygen containing gas and mixed gas of alkyl containing gas and inorganic oxygen containing gas are sequentially used, and plasma surface pretreatment is conducted on medical materials; and aftertreatment is conducted, the medical material subjected to two-step plasma surfacepretreatment is coated with a functional polysilazane solution, and a medical functional coating is formed through curing. The prepared functional coating has the advantages that curing is easy, baseselectivity does not exist, the bonding force between the functional coating and a base is high, the coating is dense and transparent, curing products are free of toxicity, and the coating is durable;and the defects of a traditional medical functional coating are overcome.

Description

technical field [0001] The invention relates to a technology in the field of functional materials, in particular to a coating method and application of a medical functional coating. Background technique [0002] As is well known to those skilled in the art, traditional medical functional coating technology has a series of disadvantages such as narrow substrate application window, single coating curing method, slow curing speed, and poor coating firmness and durability. For example, the hydrophilic super-slip coatings on medical interventional catheters on the market generally have problems with the adaptability of inert substrates. Take the silicone rubber substrate as an example, even after various surface treatments such as ultrasonic cleaning, plasma, silane coupling agent, etc., the hydrophilic coating is extremely prone to "delamination". For another example, many medical antibacterial products rely on the release of antibacterial substances to achieve the purpose of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24B05D5/08B05D5/04B05D5/00B05D3/14C09D1/00C09D183/16
CPCB05D3/142B05D5/00B05D5/04B05D5/08B05D7/24C09D1/00C09D183/16
Inventor 李丘沐常俊
Owner INST OF MEDICAL DEVICES (SUZHOU) SOUTHEAST UNIV
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