Author_Institution :
Sch. of Mech. & Electr. Eng., Nanchang Univ., Nanchang, China
Abstract :
Notice of Retraction
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
Polyurethane catheter is widely used to medical devices and implants. Electroless-deposited nanosilver is used to improve anti-bacterium property of medical polyurethane. The sodium hypophosphite, dextrose and potassium sodium tartrate were selected as reducers for electroless-deposited silver. The influences of technological parameters on electroless-deposited silver coatings were investigated, such as concentration of silver nitrate, mixture ratio of silver nitrate and reducer, temperature and time. The experimental results showed that the optimal parameters with sodium hypophosphite as reducer were silver nitrate concentration of 0.25mol/L, mixture ratio of silver nitrate and reducer of 2:1, temperature of 50°C, time of 30min, and the average diameter of silver nanoparticles was 25nm. With dextrose as reducer, the optimal parameters were silver nitrate concentration of lOg/L and time of 30s, and the average diameter of silver nanoparticles was 40nm. With potassium sodium tartrate as reducer, the optimal parameters were silver nitrate concentration of 16g/L, time of 3min, and the average diameter of silver nanoparticles was 50nm. At the same time, adding the polymer protective agents and dispersing agents will help prevent silver nanoparticles to continue growing and improve the dispersion uniformity of silver nanoparticles. In addition, the reaction rate and silver utilization with glucose as reducing agent were higher than with potassium sodium tartrate. It can be carried out at room temperature with - lucose as reducer, and is suitable to industrial applications.
Keywords :
antibacterial activity; biomedical materials; catheters; disperse systems; electroless deposited coatings; nanomedicine; nanoparticles; polymers; silver; Ag; antibacterial property; dextrose; dispersing agents; electroless deposited silver coatings; electroless deposited silver nanopaticles; electroless deposited silver reducers; medical polyurethane catheter; polymer protective agents; potassium sodium tartrate; silver nanoparticle dispersion uniformity; silver nitrate concentration; silver nitrate-reducer mixture ratio; sodium hypophosphite; temperature 50 degC; time 3 min; time 30 min; time 30 s; Catheters; Chemicals; Coatings; Nanoparticles; Silver; Sugar; Surface treatment;
