What is the hygroscopic swelling degree of polyacrylamide gels?

It worths noting that the hygroscopic swelling degree of hybrid materials with 80% CaCl 2 mass achieved 196.6%, compared with 36.5% of polyacrylamide gels and 80% of pure CaCl 2 in the same condition. The theoretical hygroscopic swelling degree of one material consisting of 80% CaCl 2 and 20% polyacrylamide is 71.3%.

Can poly(acrylamide) gels be swollen in aqueous solutions?

The present publication aims to fill that gap by presenting more than 600 data sets for the swelling of poly (acrylamide) in water and aqueous solutions of some strong electrolytes as well as of poly (ethyleneglycol) at 298 K. That data base is also used to test a model for correlating/predicting the swelling of such gels in aqueous solutions.

Which gel has the highest hygroscopic swelling?

The research results revealed that, under the optimal experimental condition (dissolution temperature of CaCl 2, 50 °C; CaCl 2 mass, 80%; environment temperature, 30 °C), the hybrid gels displayed the highest hygroscopic swelling degree resulting from high hygroscopic ability of calcium chloride and good water-binding of polyacrylamide.

Are hygroscopic swelling properties of CaCl 2 /polyacrylamide hybrid gels influenced by dissolution temperature?

The hygroscopic swelling properties and kinetics of CaCl 2 /polyacrylamide hybrid gels were investigated. To optimize the experimental condition, the influence factors such as dissolution temperature of CaCl 2, CaCl 2 mass, and hygroscopic temperature relative to the hygroscopic swelling degree of hybrid desiccants were studied systematically.

What is the hygroscopic swelling degree of 80% CaCl 2 & 20% polyacrylamide?

The theoretical hygroscopic swelling degree of one material consisting of 80% CaCl 2 and 20% polyacrylamide is 71.3%. But in fact, thanks to the synergistic effect, the hygroscopic swelling degree of hybrid gels made from 80% CaCl 2 and 20% polyacrylamide is 196.5%.

Do hybrid gels combine calcium chloride and polyacrylamide?

It is expected that the hybrid gels would combine low cost and fairly high hygroscopic ability of calcium chloride with the good water-binding of polyacrylamide. The swelling properties and the hygroscopic swelling kinetics for hybrid gels were investigated. 2. Experimental 2.1. Hybrid gels preparation