scholarly journals Rheological and Swelling Behavior of pH Sensitive Hydrogel Particles

2014 ◽  
Vol 9 ◽  
pp. 192-196 ◽  
Author(s):  
Lomas K. Tomar ◽  
Charu Tyagi ◽  
Yahya E. Choonara ◽  
Pradeep Kumar ◽  
Viness Pillay
Keyword(s):  
Ph Sensitive ◽  
Swelling Behavior ◽  
Hydrogel Particles ◽  
Ph Sensitive Hydrogel

A Transient Simulation for Analysis of Volume Transition of pH-Sensitive Hydrogel in Micro-Channel

2009 ◽  
Vol 74 ◽  
pp. 25-28
Author(s):  
Hua Zou ◽  
Hua Li
Keyword(s):  
Ph Value ◽  
External Solution ◽  
Ionic Species ◽  
Ph Sensitive ◽  
Swelling Behavior ◽  
Bathing Solution ◽  
Buffer Solution ◽  
Solution Ph ◽  
Smart Hydrogel ◽  
Ph Sensitive Hydrogel

Based on Donnan’s equilibrium, a simple chemo-mechanical model is developed to study the transient swelling behavior of the pH-sensitive hydrogel for design and optimization of smart hydrogel-based BioMEMS device. The model is mathematically composed of several governing equations, including Fick’s law which describes the diffusion process in the buffer solution, the fixed charge density formula associated with pH value of the buffer solution, and mechanical equation which gives the swelling ratio responding to pH. The model also considers several chemical conditions, including Donnan’s equilibrium condition which gives Donnan partitioning ratio relating to the concentrations of ionic species in the interior hydrogel and the external solution, the electroneutrality condition in the interior hydrogel and bathing solution as well. The model is capable of predicting the kinetics process of the smart hydrogel immersed in buffer solution with change in pH. The simulation of the diffusion-swelling behavior of the pH-sensitive hydrogel is presented, and the responsive deformation of the smart hydrogel to the solution pH is discussed in detail.

pH-Sensitive graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel with improved mechanical strength

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 89083-89091 ◽  
Author(s):  
Huijuan Zhang ◽  
Xianjuan Pang ◽  
Yuan Qi
Keyword(s):  
Graphene Oxide ◽  
Mechanical Strength ◽  
Sodium Alginate ◽  
Ph Sensitive ◽  
Swelling Behavior ◽  
Ph Dependent

A pH-sensitive and mechanically strong graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel was designed and prepared. The composite semi-IPN hydrogel showed superior mechanical strength and pH-dependent swelling behavior.

Preparation and characterization of pH-sensitive hydrogel for drug delivery system

RSC Advances ◽  
2012 ◽  
Vol 2 (20) ◽  
pp. 7772 ◽  
Author(s):  
Ke Wang ◽  
Qiang Fu ◽  
Xi Chen ◽  
Yang Gao ◽  
Kai Dong
Keyword(s):  
Drug Delivery ◽  
Drug Delivery System ◽  
Delivery System ◽  
Ph Sensitive ◽  
Ph Sensitive Hydrogel
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