1. Synthesis of γ Phase and Amorphous Solid Dispersion of Glycine from α-Glycine During the Solvent-Free Ball Milling Process.
- Author
-
Chen, Fenghua, Man, Nuo, Yang, Chenmei, Cao, Renfen, Lian, Yuezong, Zhang, Jian-Han, Lai, Wenzhong, Xue, Rongrong, and Ma, Yurong
- Subjects
- *
AMORPHOUS substances , *BALL mills , *GLYCINE , *DISPERSION (Chemistry) , *AMORPHIZATION - Abstract
Nano α-glycine crystals, γ-glycine crystals, and amorphous solid dispersion (ASD) of glycine were prepared through solvent-free ball milling of commercial α-glycine. The solid-state polymorph conversion of glycine from α to γ was completely realized by ball milling with 0.2 wt.% NaCl for 1 h or by ball milling with 0.02 wt.% NaCl for 1 h with subsequent storage for one week. The ASD of glycine was prepared by ball milling α-glycine with an equal amount of CaCl 2 for 1 h. We studied the effect of inorganic salt types and their concentrations on the extent of polymorph conversion and amorphization of glycine in our experiments. This solvent-free ball milling method could be used for the synthesis of polymorphs and amorphous phase of drugs and other organic materials. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF