Semi-interpenetrating Polyurethane Network Foams Containing Highly Branched Poly(N-isopropyl acrylamide) with Vancomycin Functionality

2021 ◽  
Author(s):  
Thomas Swift ◽  
Richard Hoskins ◽  
John Hicks ◽  
Edward Dyson ◽  
Marc Daignault ◽  
...  
Keyword(s):  
Isopropyl Acrylamide

scholarly journals Smart Hydrogel Bilayers Prepared by Irradiation

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1753
Author(s):  
Weixian Huo ◽  
Heng An ◽  
Shuquan Chang ◽  
Shengsheng Yang ◽  
Yin Huang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Gamma Radiation ◽  
Antibacterial Properties ◽  
Cross Linking ◽  
Temperature Sensitive ◽  
Temperature Changes ◽  
Smart Hydrogel ◽  
Isopropyl Acrylamide ◽  
Hydrogel Synthesis ◽  
Potential Applications

Environment-responsive hydrogel actuators have attracted tremendous attention due to their intriguing properties. Gamma radiation has been considered as a green cross-linking process for hydrogel synthesis, as toxic cross-linking agents and initiators were not required. In this work, chitosan/agar/P(N-isopropyl acrylamide-co-acrylamide) (CS/agar/P(NIPAM-co-AM)) and CS/agar/Montmorillonite (MMT)/PNIPAM temperature-sensitive hydrogel bilayers were synthesized via gamma radiation at room temperature. The mechanical properties and temperature sensitivity of hydrogels under different agar content and irradiation doses were explored. The enhancement of the mechanical properties of the composite hydrogel can be attributed to the presence of agar and MMT. Due to the different temperature sensitivities provided by the two layers of hydrogel, they can move autonomously and act as a flexible gripper as the temperature changes. Thanks to the antibacterial properties of the hydrogel, their storage time and service life may be improved. The as prepared hydrogel bilayers have potential applications in control devices, soft robots, artificial muscles and other fields.

Swelling of N-isopropyl acrylamide hydrogels in aqueous solutions of sodium chloride

2006 ◽  
Vol 240 (2) ◽  
pp. 186-196 ◽  
Author(s):  
Andreas Hüther ◽  
Xiaoping Xu ◽  
Gerd Maurer
Keyword(s):  
Sodium Chloride ◽  
Aqueous Solutions ◽  
Isopropyl Acrylamide

Swelling of a N-isopropyl acrylamide hydrogel in two aqueous/organic two-phase systems

2005 ◽  
Vol 235 (1) ◽  
pp. 18-25 ◽  
Author(s):  
Yury Orlov ◽  
Xiaoping Xu ◽  
Gerd Maurer
Keyword(s):  
Two Phase ◽  
Isopropyl Acrylamide ◽  
Phase Systems
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