Functionalization of hydrocolloids: principal component analysis applied to the study of correlations between parameters describing the consistency of hydrogels.
This work was part of a pure research project on the functionalization of three families of hydrocolloids: cellulose derivatives, carrageenates, and alginates. Principal component analysis (PCA), a powerful statistical method, was used to demonstrate the relations existing among these different parameters that describe the consistency of hydrogels and their spreadability. This approach therefore provides a basis for modeling hydrogel consistency. PCA also afforded a classification of hydrogels that demonstrated the remarkable adhesiveness of very stiff gels based on cellulose derivatives and sodium or potassium alginates. The corresponding semi-fluid gels and all the gels based on carrageenates and mixed sodium-calcium alginates, whatever their spreadability, were found to be very poorly adhesive. Generalized to all the many colloids currently marketed, this approach can be used to set up a databank for the formulation of mucoadhesive excipients.
Lardy
F
F
Laboratoire de Pharmacie Galénique et Pharmacotechnie, UFR Pharmacie, Clermont-Ferrand, France.
Vennat
B
B
Pouget
M P
MP
Pourrat
A
A
D000268:Adhesiveness; D000464:Alginates / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D020100:Hydrogels / Q000737:chemistry* / Q000145:classification
D000464:Alginates; D020100:Hydrogels; D002482:Cellulose