Improvements of electromechanical properties of gelatin hydrogels by blending with nanowire polypyrrole: effects of electric field and temperature

Tungkavet, Thawatchai; Seetapan, Nispa; Pattavarakorn, Datchanee; Sirivat, Anuvat

doi:10.1002/pi.4149

Cited by 23 publications

(21 citation statements)

References 31 publications

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“…14 These fillers have been shown to significantly increase the electrical conductivity of the hydrogel, but they also tend to reduce the hydrogels capability of swelling. 15 Recently, there has been significant interest in using multiwalled carbon nanotubes (MWCNTs) as a polymer composite filler due to its electrical and thermal properties. 16,17 The high mechanical strength also makes them attractive materials for polymer reinforcement.…”

Section: Introductionmentioning

confidence: 99%

“…Inorganic fillers such as graphene, polyaniline, polypyrrole, zinc, and copper have been used to increase the electrical conductivity of hydrogels . These fillers have been shown to significantly increase the electrical conductivity of the hydrogel, but they also tend to reduce the hydrogels capability of swelling . Recently, there has been significant interest in using multiwalled carbon nanotubes (MWCNTs) as a polymer composite filler due to its electrical and thermal properties .…”

Section: Introductionmentioning

confidence: 99%

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Electromechanical Properties of Carbon Nanotube Infused Polyacrylamide Hydrogel

et al. 2014

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Typically, electroresponsive hydrogels have either a high electrical conductivity with little swelling or large swelling with low conductivity. This paper investigates a method of maintaining high swelling capabilities and increasing electrical conductivity by infusing multiwalled carbon nanotubes (MWCNTs) into a hydrolyzed polyacrylamide hydrogel. Various concentrations of MWCNT and Nafion solutions infused into the hydrogel were investigated. Optical microscopy analysis showed aggregates of carbon nanotube bundles at the macroscale, whereas electron microscopy revealed homogeneous dispersion of carbon nanotube in the polymer matrix at the microscale. Electrical conductivity measurements demonstrated an increase from 0.02 to 0.11 mS cm -1 with infused MWCNT. The MWCNT-infused hydrogels demonstrated a 400% increase in deswelling capabilities during an applied electrical stimulus compared to a noninfused hydrogel. In conclusion, infusing the MWCNT into the hydrogel increased its electrical conductivity, which allows the hydrogel to deswell more rapidly with an applied electrical bias without compromising its mechanical or swelling properties. C

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electromechanical Properties of Carbon Nanotube Infused Polyacrylamide Hydrogel

et al. 2014

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“…Moreover, it can be noted that the initial storage modulus (G′ 0 ) of the SF hydrogel as prepared by 0.01 vol.% GTA in 5 vol.% SF solution is slightly higher than those of SF hydrogels prepared by 0.01 and 1.0 vol.% GTA in 4 vol.% SF solutions, due to its initially denser chain molecule in the absence of electric field. Increasing the amount of crosslinking agent reduces the number of reactive carbonyl and amine groups available which can generate dipole moments along SF chains [30]. Therefore, the number of active sites which can respond to the applied electric field is reduced with increasing crosslinking agent, thus reducing the storage modulus response and sensitivity.…”

Section: Effects Of Sf and Glutaraldehyde Concentrationsmentioning

confidence: 99%

Electromechanical response of silk fibroin hydrogel and conductive polycarbazole/silk fibroin hydrogel composites as actuator material

Srisawasdi

Petcharoen

Sirivat

et al. 2015

Materials Science and Engineering: C

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“…Partially, homogeneous P2ClAn/Pectin hydrogel blend was obtained possibly because of the Van der Waals force and the hydrogen bonding interactions between P2ClAn and pectin backbone. 13,14 Time dependence of the electromechanical response…”

Section: Scanning Electron Microscopementioning

confidence: 99%

Soft poly(2-chloroaniline)/pectin hydrogel and its electromechanical properties

et al. 2017

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Pectin hydrogels were successfully fabricated with various physical crosslinkers and concentrations for soft actuator applications. A small amount of synthesized P2ClAn was added as a dispersed phase into the pectin matrix. The electromechanical properties of the pectin hydrogels and blends were investigated under the effects of electric field strength, ionic crosslinker type and concentration, and P2ClAn concentration. The electromechanical properties of the pectin hydrogel as crosslinked by Fe were superior to other pectin hydrogels. The pristine pectin hydrogel and the P2ClAn/Pectin hydrogel blended with 0.10%v/v P2ClAn provided the high storage modulus sensitivity values of 8.61 and 14.01, respectively, under the electric field strength of 800 V/mm. The P2ClAn/Pectin hydrogel blend responded to the electric field with higher dielectrophoretic forces, but lower deflections relative to the pristine pectin hydrogel due to the additional P2ClAn polarization and the latter lower rigidity.

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Improvements of electromechanical properties of gelatin hydrogels by blending with nanowire polypyrrole: effects of electric field and temperature

Cited by 23 publications

References 31 publications

Electromechanical Properties of Carbon Nanotube Infused Polyacrylamide Hydrogel

Electromechanical Properties of Carbon Nanotube Infused Polyacrylamide Hydrogel

Electromechanical response of silk fibroin hydrogel and conductive polycarbazole/silk fibroin hydrogel composites as actuator material

Soft poly(2-chloroaniline)/pectin hydrogel and its electromechanical properties

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