Materials Science and Engineering: C 2013-05-01

Solution growth of spherulitic rod and platelet calcium phosphate assemblies through polymer-assisted mesoscopic transformations.

Vassiliki A Kosma, Konstantinos G Beltsios

文献索引:Mater. Sci. Eng. C. Mater. Biol. Appl. 33(4) , 2175-91, (2013)



Solution growth of apatite its precursors in the presence of urea commercial gelatin is found to lead, under appropriate conditions, to a rich spectrum of morphologies, among them high aspect ratio needles in uniform sturdy spherulitic assemblies resulting from a herein documented morphological 'Chrysalis Transformation'; the latter transformation involves the growth of parallel arrays of high aspect ratio needles within micron-scale tablets the formation of a radial needle arrangement upon disruption of tablet wrapping. A different level of gelatin leads to the formation of sturdy platelet-based spherulites through another morphological transformation. We also probe the role of four simple synthetic water-soluble polymers; we find that three of them (poly(vinyl alcohol), polyvinylpyrrolidone and polyacrylamide)) also affect substantially the assembly habits of apatite; the effect is similar to that of gelatin but the attained control is less perfect/complete. The case of poly(vinyl alcohol) provides, through variation of the degree of hydrolysis, insights as regards the chain architecture features that might favor morphological transformations. Morphological transformations of particle assemblies documented herein constitute novel ways of generating dense quasi-isotropic reinforcements with high aspect ratio ceramic particles; it becomes possible to tailor calcium phosphate phases at the structural level of crystal assembly.Copyright © 2013 Elsevier B.V. All rights reserved.


  • 明胶
  • 聚乙烯吡咯烷酮
  • 聚乙烯醇
  • 聚丙烯酰胺


Unique Features of Human Protein Arginine Methyltransferase 9 (PRMT9) and Its Substrate RNA Splicing Factor SF3B2.


[J. Biol. Chem. 290 , 16723-43, (2015)]

Fluorometric immunocapture assay for the specific measurement of matrix metalloproteinase-9 activity in biological samples: application to brain and plasma from rats with ischemic stroke.


[Mol. Brain 6 , 14, (2013)]

Relating the variation of secondary structure of gelatin at fish oil-water interface to adsorption kinetics, dynamic interfacial tension and emulsion stability.


[Food Chem. 143 , 484-91, (2014)]

Microstructure and characteristic properties of gelatin/chitosan scaffold prepared by a combined freeze-drying/leaching method.


[Mater. Sci. Eng. C. Mater. Biol. Appl. 33(7) , 3958-67, (2013)]

In vitro growth of bioactive nanostructured apatites via agar-gelatin hybrid hydrogel.


[J. Biomed. Nanotechnol. 9(12) , 1972-83, (2013)]