Your browser doesn't support javascript.
loading
Electromagnetic radiation driving of volume changes in nanocomposites made of a thermosensitive hydrogel polymerized around conducting polymer nanoparticles.
Abel, Silvestre Bongiovanni; Rivarola, Claudia R; Barbero, Cesar A; Molina, Maria.
Afiliación
  • Abel SB; Research Institute for Energy Technologies and Advanced Materials (IITEMA), National University of Rio Cuarto (UNRC), National Council of Scientific and Technical Research (CONICET) Ruta Nacional No. 36 Km 601, Agencia Postal No. 3 5800 Río Cuarto Argentina mmolina@exa.unrc.edu.ar +543584676233 +543
  • Rivarola CR; Research Institute for Energy Technologies and Advanced Materials (IITEMA), National University of Rio Cuarto (UNRC), National Council of Scientific and Technical Research (CONICET) Ruta Nacional No. 36 Km 601, Agencia Postal No. 3 5800 Río Cuarto Argentina mmolina@exa.unrc.edu.ar +543584676233 +543
  • Barbero CA; Research Institute for Energy Technologies and Advanced Materials (IITEMA), National University of Rio Cuarto (UNRC), National Council of Scientific and Technical Research (CONICET) Ruta Nacional No. 36 Km 601, Agencia Postal No. 3 5800 Río Cuarto Argentina mmolina@exa.unrc.edu.ar +543584676233 +543
  • Molina M; Research Institute for Energy Technologies and Advanced Materials (IITEMA), National University of Rio Cuarto (UNRC), National Council of Scientific and Technical Research (CONICET) Ruta Nacional No. 36 Km 601, Agencia Postal No. 3 5800 Río Cuarto Argentina mmolina@exa.unrc.edu.ar +543584676233 +543
RSC Adv ; 10(15): 9155-9164, 2020 Feb 27.
Article en En | MEDLINE | ID: mdl-35496518
ABSTRACT
Polymeric nanocomposites were obtained by the formation of a thermosensitive hydrogel matrix around conducting polymer (CP) nanoparticles. The CP is able to absorb electromagnetic radiation which is converted into heat and induces the phase transition of the surrounding hydrogel. The method chosen to form the hydrogel is the free radical polymerization of a copolymer (N-isopropylacrylamide (NIPAM) and 2-acrylamide-2-methylpropano sulfonic acid (AMPS), PNIPAM-co-2% AMPS) in the presence of bisacrylamide as the crosslinker. The nanoparticles are polypyrrole nanospheres (PPy NP), polyaniline nanofibers (PANI NF), and polyaniline nanospheres (PANI NP). The morphology of the composites was studied using SEM microscopy and the percentage composition of each material was evaluated by thermogravimetric analysis (TGA). The swelling equilibrium capacity and rate are clearly affected by the nanoparticle shape and nature. However, the nanocomposites LCST are similar to that of the matrix. Upon RF irradiation, the three nanocomposites increase the temperature and reach the LCST after 320 seconds of irradiation (320 kJ). Upon MW application, the local temperature reaches the LCST after only 30 s (21 kJ), resulting in a MW more effective than RF to drive the transition. These results demonstrate that the proposed materials are useful as a remotely driven actuator.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: RSC Adv Año: 2020 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: RSC Adv Año: 2020 Tipo del documento: Article