Synthesis and swelling behaviors of semi‐IPNs superabsorbent resin based on chicken feather protein

Abstract

A novel chicken feather protein-g-poly (potassium acrylate)/polyvinyl alcohol (CFP-g-PKA/PVA) semi-IPNs superabsorbent resin (SAR) based on feather protein, acrylic acid (AA), and polyvinyl alcohol (PVA) was synthesized by graft copolymerization and semi-interpenetrating technology. The results from FTIR, SEM, and TGA analysis showed that both CFP and PVA reacted with PKA during the polymerization process. The effects of AA, PVA, initiator and crosslinker content on water absorbency of semi-IPNs SAR were studied. The swelling behavior in various pHs and saline solutions were also investigated. The water absorbency of SAR reached the maximum at pH 5 6. The effect of the five cations on swelling had the following order:. The highest water absorbency in distilled water and 0.9 wt % NaCl solutions were 714.22 and 70.08 g g 21 , respectively.

Fast swelling behaviors of thermosensitive poly(N‐isopropylacrylamide‐co‐methacryloxyethyltrimethyl ammonium chloride)/Na2WO4 cationic composite hydrogels

“…Moreover, the wall of the N 5 D 1 W 0 hydrogel was thicker than that of the N 5 D 1 W 17 hydrogel [Figure (b)]. The microporous structure and thin wall of the N 5 D 1 W 17 hydrogel increased the surface area and was conducive to water infiltration into the hydrogel network . It was confirmed by the subsequent swelling kinetics experiments.…”

Multifunctional Lignin-Silver Nanoparticles for Accelerating Polymerization and Cross-Linking of Sodium Polyacrylate

“…However, higher LANP contents (LANPs 10% /SPA) offered more cross-linking points, whereas the available free volume within the network decreased. Besides, the elasticity of the polymeric network of the SAP decreased, which was also responsible for the decrease in WAC …”

“…Besides, the elasticity of the polymeric network of the SAP decreased, which was also responsible for the decrease in WAC. 39 The effects of reaction time on the WAC of gel are shown in Figure 4e. Except for LANPs 5% /SPA, the water absorption of other gels enhanced with the prolonged polymerization time.…”

Superabsorbent Polymer with Excellent Water/Salt Absorbency and Water Retention, and Fast Swelling Properties for Preventing Soil Water Evaporation

“…However, when the content of APS was higher than 0.8 wt%, the number of active free radicals generated increased [36]. This caused the reaction intensi ed, the chain segments between the cross-linking points of the polymer became shorter, and the network structure of the polymer became more di cult to expand [37]. Therefore, the water (salt) absorbency was lower.…”