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During the use of medical devices, it is usually necessary to directly or indirectly contact the human body
.
For tertiary medical devices such as microcatheters and vascular stents, the requirements for the production process are very high, and plasma surface treatment has gradually become an indispensable link
.
Plasma surface modification can form functional groups such as amine groups, carbonyl groups, hydroxyl groups, and carboxyl groups on the surface to improve the interfacial adhesion
.
The application of plasma surface treatment in medical treatment actually solves the problem of surface treatment of medical materials and the problem of medical and human biocompatibility
.
Currently, plasma surface treatments can be applied prior to printing, prior to coating, prior to bonding, prior to surface grafting, and prior to surface polymerization
.
Taking the microcatheter containing PP (polypropylene) material as an example, the surface energy of this type of catheter is relatively low and it is in a hydrophobic state.
Product performance
.
Medical infusion catheters, drainage tubes, urinary catheters, etc.
, the raw materials are composed of silicone, latex, PVC,
etc.
Activation treatment of polyvinyl chloride (PVC) catheter before bonding, printing and coating , the catheter is placed on the bracket
.
Medical consumables, including cell culture dishes, ELISA plates, etc.
, are generally made of polystyrene (PS), and their surface wettability is not good
.
After plasma surface treatment, the surface can be activated, which is conducive to the introduction of active functional groups such as hydroxyl, carboxyl, amino, and epoxy groups by grafting, which can not only help the immobilization of enzymes, but also prolong the time of surface hydrophilicity
.
In fact, in the medical field, many products are already using the plasma surface treatment process, including the pretreatment of the surface coating of heart valves and cardiovascular stents, the bonding of cochlear implants, the cleaning and functional coating of contact lenses, and the bonding of injection needles.
Before activation, medical non-woven functional coating, etc.
, the application of plasma surface treatment in the medical device industry has broad prospects!
