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New brushite cements analysis

G. D. PADURARU1, N. AELENEI1, D. LUCA2, N. CIMPOEŞU2,*

Affiliation

  1. The ”Gh. Asachi” Technical University of Iasi, Chemical Engineering and Environmental Protection Faculty, Prof. dr. docent Dimitrie Mangeron Rd., 73, 700050, Iaşi, Romania
  2. Gh. Asachi Technical University of Iasi, Faculty of Materials Science and Engineering, Prof. dr. docent Dimitrie Mangeron Rd., 61 A, 700050, Iasi, Romania

Abstract

Some brushite cements were developed using -tricalcium phosphate (-TCP) and monocalcium phosphate monohydrate (MCPM) as precursors and acidic solutions of chitosan lactate as setting solutions. The influence of the chitosan lactate concentration and of liquid to powder ratio (L/P) on setting times and compressive strength were analyzed. Cement samples were characterized by XRD, and SEM. Increasing L/P ratio results in an increase of initial and final setting times. On the other hand, increase of the chitosan lactate concentration leads both to a decrease of setting time and an increase of compressive strength. When very acidic setting solutions are used a mixture of brushite and monetite are obtained. The better cement was obtained using as setting liquid a solution of 5% chitosan lactate in 1.4 M lactic acid..

Keywords

Brushite, Monetite, Chitosan lactate, Compressive strength, XRD.

Citation

G. D. PADURARU, N. AELENEI, D. LUCA, N. CIMPOEŞU, New brushite cements analysis, Optoelectronics and Advanced Materials - Rapid Communications, 5, 4, April 2011, pp.465-468 (2011).

Submitted at: March 21, 2011

Accepted at: April 11, 2011