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Electrical actuation of electroresponsive hydrogels based on poly(acrylamide‐ co ‐acrylic acid)/graphite suitable for biomedical applications
Author(s) -
Boruah Monalisha,
Phukon Pinkee,
jyoti Saikia Bhaskar,
Dolui S.K.
Publication year - 2014
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22630
Subject(s) - self healing hydrogels , materials science , acrylic acid , potassium persulfate , chemical engineering , polymerization , swelling , ultimate tensile strength , polymer , graphite , polymer chemistry , composite material , ammonium persulfate , aqueous solution , ethylene glycol , copolymer , organic chemistry , chemistry , engineering
A pH‐sensitive composite hydrogel based on poly(acrylamide‐ co ‐acrylic acid)/graphite was prepared by solution polymerization process in presence of redox initiator potassium persulfate/ N , N , N ′, N ′‐tetramethylethylenediamine and cross‐linker (ethylene glycol dimethylacrylate). The structures of the hydrogels were confirmed using Fourier transform infrared, X‐ray diffraction, and scanning electron microscopy (SEM) study. Tensile strengths of the hydrogels were determined by using a universal tensile machine, whereas the electrical conductivities of the hydrogels were evaluated using Four‐probe method. The influence of cross‐linker, graphite content, and temperature on the conductivity of the hydrogel was also investigated. The bending behavior of the conducting hydrogels was investigated by exposing the hydrogels under electric field in aqueous medium. By studying the swelling ratio of the polymer synthesized under different conditions, optimization conditions were found for a polymer with the highest swelling ratio. Also, the hemolytic potentiality test revealed that prepared hydrogels are biocompatible in nature. POLYM. COMPOS., 35:27–36, 2014. © 2013 Society of Plastics Engineers