Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Mechanical Engineering
Preparation Of La0.8sr0.2ga0.83mg0.17o2.815 Powders By Microwave-Induced Poly(Vinyl Alcohol) Solution Polymerization, Yuling Zhai, Chang Ye, Feng Xia, Jianzhong Xiao, Lei Dai, Yifan Yang, Yongqian Wang
Preparation Of La0.8sr0.2ga0.83mg0.17o2.815 Powders By Microwave-Induced Poly(Vinyl Alcohol) Solution Polymerization, Yuling Zhai, Chang Ye, Feng Xia, Jianzhong Xiao, Lei Dai, Yifan Yang, Yongqian Wang
Dr. Chang Ye
A new and simple chemical route, named microwave-induced poly(vinyl alcohol) (PVA) solution polymerization, has been used to prepare fine, homogeneous and high-density pellets of purer La0.8Sr0.2Ga0.83Mg0.17O2.815 (denoted as LS0.2GM0.17). The effect of different contents of PVA as the polymeric carrier, was studied and we obtained an optimal amount of PVA (1.65:1 ratio of positively charged valences of the cations (Men+) to negatively charged hydroxyl (–OH−) groups of the organics), which could ensure homogenous distribution of the metal ions in the polymeric network structure and inhibit segregation. The behavior of the powder after calcination at different temperatures was studied. The PVA …
Comparison Of The Release Behaviors Of Cupric Ions From Metallic Copper And A Novel Composite In Simulated Body Fluid, Juan Li, Jinping Suo, Xunbin Huang, Chang Ye, Xiwang Wu
Comparison Of The Release Behaviors Of Cupric Ions From Metallic Copper And A Novel Composite In Simulated Body Fluid, Juan Li, Jinping Suo, Xunbin Huang, Chang Ye, Xiwang Wu
Dr. Chang Ye
The copper-containing intrauterine devices (Cu-IUDs) are being increasingly used worldwide as an effective contraceptive for family planning. To avoid abnormal bleeding, pain, and partial and complete expulsion which are associated with the burst release of copper during the first few days, a novel crosslinked composite based on poly(vinyl alcohol) that contained cupric ions, but not metallic copper, was synthesized. It is hypothesized that the burst release of cupric ions could be avoided and the utility of the cupric ions could be improved by this novel composite. To evaluate these effects of the composite, the corrosion products and the release rate …