Dissolution Rates of a Bio-active Borate Glass in Water
Department
Materials Science and Engineering
Major
Ceramic Engineering
Research Advisor
Brow, Richard K.
George, Jaime
Advisor's Department
Materials Science and Engineering
Funding Source
National Science Foundation (DMR-1207520)
Abstract
Borate glasses have been developed at Missouri S&T for biomedical applications, but less is known about how these glasses react in aqueous environments than more common silicate bioactive glasses. This research used the Single Pass Flow Through (SPFT) test to study the dissolution rates of a borate bioactive glass with a composition of c53B2O3-20CaO-12K2O-6Na2O-5MgO-4P2O5 (wt%) in deionized water at °C. The SPFT flow rate was kept constant at 15 ml per day and the amount of glass particles in a reaction cell was varied by a factor of 20. Increasing sample size increases the concentration of ions in a reaction cell which in turn influences the dissolution rate. Solution samples were collected throughout the testing period and analyzed by inductively coupled plasma optical emission spectroscopy (ICP-OES) to determine the concentrations of boron, calcium, sodium, magnesium, phosphorus, and potassium in each sample at the different time periods. The smallest sample (0.05 grams) dissolved completely in 4 days whereas only 71% of the largest sample (1.00 grams) dissolved after 13 days. The slower dissolution rates for larger sample sizes are consistent with the greater ionic strengths of solutions measured by ICP-OES. The ICP-OES data was also used to calculate changes in average particle sizes which decreased with dissolution time for all experimental conditions.
Biography
Angela Grueninger is a senior in Ceramic Engineering. She has been working with Dr. Brow and his research group for one year assisting in and conducting various research experiments on bio-active glass and other glass applications. Angela looks forward to doing more research in the area of bio-active glass and working in this area upon her graduation from Missouri S&T in December 2015.
Research Category
Engineering
Presentation Type
Poster Presentation
Document Type
Poster
Location
Upper Atrium/Hall
Presentation Date
15 Apr 2015, 1:00 pm - 3:00 pm
Dissolution Rates of a Bio-active Borate Glass in Water
Upper Atrium/Hall
Borate glasses have been developed at Missouri S&T for biomedical applications, but less is known about how these glasses react in aqueous environments than more common silicate bioactive glasses. This research used the Single Pass Flow Through (SPFT) test to study the dissolution rates of a borate bioactive glass with a composition of c53B2O3-20CaO-12K2O-6Na2O-5MgO-4P2O5 (wt%) in deionized water at °C. The SPFT flow rate was kept constant at 15 ml per day and the amount of glass particles in a reaction cell was varied by a factor of 20. Increasing sample size increases the concentration of ions in a reaction cell which in turn influences the dissolution rate. Solution samples were collected throughout the testing period and analyzed by inductively coupled plasma optical emission spectroscopy (ICP-OES) to determine the concentrations of boron, calcium, sodium, magnesium, phosphorus, and potassium in each sample at the different time periods. The smallest sample (0.05 grams) dissolved completely in 4 days whereas only 71% of the largest sample (1.00 grams) dissolved after 13 days. The slower dissolution rates for larger sample sizes are consistent with the greater ionic strengths of solutions measured by ICP-OES. The ICP-OES data was also used to calculate changes in average particle sizes which decreased with dissolution time for all experimental conditions.
