Recherche sur les biopolymères

Abstrait

Thermo responsive chemical compound membrane for the native delivery of medicine

Charlene C

The aim of this study was to research the utilization of thermotropic liquid crystalline (TLC) blends of 4-pentyl-4′-cyanobiphenyl (K15) and 4-heptyl-4′-cyanobiphenyl (K21) with acceptable nematic to identical section temperature (Tn − i) simply higher than vital sign as a temperature-modulated drug permeation system. victimisation differential scanning measuring (DSC) we tend to showed that the phase change temperature (Tn − i) of K15 and K21 were thirty four.2°C and 41.5°C severally. However, the thermogram of K15 and K21 blends with totally different ratios was shown to be one energy- absorbing peak almost like that of pure TLCs. K15 and K21 mixs failed to behave as a physical blend of 2 thermotropic liquid crystals with totally different TN − i. However, they're rather mixed along in such ways in which behave sort of a single unit tender loving care. The TN − i of those tender loving care mixtures was linearly proportionate to the magnitude relation of K15:K21. victimisation acceptable magnitude relation of K15:K21 tender loving care, a mix with fascinating phase change temperature was obtained. A triple layer of guncotton membranes containing a 50:50 mixture of K15 and K21 was used for drug permeation studies. This composite membrane showed sensible pulsatile permeation of drug molecules in response to temperature changes below and higher than the TN − i of the K15 and K21 blends during a duplicable and reversible manner. Paracetamol and methimazole were chosen as hydrophobic and deliquescent drug models, severally. Methimazole permeableness through the tender loving care membrane was a lot of higher (36.0 × 10−5 cm/s) at temperatures higher than the phase change temperature of liquid blends than that (7.2 × 10−5 cm/s) at temperatures below the phase change temperature of liquid blends (38.1°C).