Dual thermo- and pH-sensitive poly(2-hydroxyethyl methacrylate-co-acrylic acid)-grafted graphene oxide

2014 ◽  
Vol 292 (10) ◽  
pp. 2599-2610 ◽  
Author(s):  
Masoumeh Nikdel ◽  
Mehdi Salami-Kalajahi ◽  
Mahdi Salami Hosseini
Keyword(s):  
Graphene Oxide ◽  
Acrylic Acid ◽  
Ph Sensitive ◽  
Hydroxyethyl Methacrylate

Rapid synthesis of macroporous graphene oxide/poly(acrylic acid-co-acrylamide) nanocomposite hydrogels with pH-sensitive behavior by frontal polymerization

RSC Advances ◽  
2016 ◽  
Vol 6 (40) ◽  
pp. 33426-33432 ◽  
Author(s):  
Shengfang Li ◽  
Shilin Yan
Keyword(s):  
Graphene Oxide ◽  
Acrylic Acid ◽  
Water Solution ◽  
Solvent Mixture ◽  
Ph Sensitive ◽  
Frontal Polymerization ◽  
Nanocomposite Hydrogels ◽  
Conductive Medium ◽  
Sensitive Behavior ◽  
Poly Acrylic Acid

Macroporous pH-sensitive graphene oxide (GO)/poly(acrylic acid-co-acrylamide) (PAA) nanocomposite hydrogels were prepared by frontal polymerization (FP) using a solvent mixture composed of DMF and a small quantity of GO water solution as a heat conductive medium.

Development of a facile one-pot synthesis method for an ingestible pH sensitive actuator

MRS Advances ◽  
2019 ◽  
Vol 5 (17) ◽  
pp. 881-889
Author(s):  
Alex Keller ◽  
Holly Warren ◽  
Marc in het Panhuis
Keyword(s):  
Acrylic Acid ◽  
Calcium Hydroxide ◽  
Sodium Citrate ◽  
Synthesis Method ◽  
Gastric Fluid ◽  
Ph Sensitive ◽  
One Pot ◽  
Acidic Environments ◽  
Printed Materials ◽  
Poly Acrylic Acid

ABSTRACTEdible devices are an emergent technology and in this paper the simplicity and efficacy that poly(acrylic acid)/calcium hydroxide possess in creating a pH sensitive ingestible actuator which responds to acidic environments such as gastric fluid is demonstrated. It was found that poly(acrylic acid)/calcium hydroxide hydrogels exhibit reversible actuation upon submerging in 0.1 M sodium citrate for 2 hours. Our results show that these hydrogels can restore their compressive stress to 0.19 ± 0.06 MPa, swelling ratio to 26 ± 2 and volume to 56% ± 3% of its original volume. This work offers new possibilities for developments in a variety of fields such as drug delivery, 4D printed materials, soft robotics and edible devices.

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