A fast (30 s) thermoresponse and rapid (30 min) self-healing were achieved by noncovalently incorporating a small fraction of poly(N-isopropylacrylamide) (PNIPAM) nanogels (<= 0.18 wt %) into a benzyl methacrylate-cooctadecyl methacrylate-co-methacrylic acid (BOMA-16) polymer matrix. The PNIPAM serves as the thermoresponsive component while the BOMA-16 provides self-healing via hydrophobic associations. The PNIPAM/BOMA-16 composite showed tunable lower critical solution temperature and up to. 95% more visible light modulation (triangle T) than the same concentration of PNIPAM by itself. Conversely, the PNIPAM nanogels (<= 0.18 wt %) served as reinforcements and increased the storage modulus of the PNIPAM/BOMA-16 hydrogel by up to 2.7 times relative to a BOMA-16 hydrogel. Using different analytical techniques, we show that the synergistic thermoresponsive light modulation is due to a hydrophilic hydrophobic phase transition and clustering of the PNIPAM nanogels facilitated by the BOMA-16. The synergistic optical effect is also observed for mixtures of PNIPAM and other polyelectrolytes.
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页码:3671 / 3679
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[11]
Kim J, 2010, NAT MATER, V9, P159, DOI [10.1038/NMAT2606, 10.1038/nmat2606]
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Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Konieczynska, Marlena D.
Villa-Camacho, Juan C.
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Beth Israel Deaconess Med Ctr, Ctr Adv Orthopaed Studies, 330 Brookline Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Villa-Camacho, Juan C.
Ghobril, Cynthia
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Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Ghobril, Cynthia
Perez-Viloria, Miguel
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Beth Israel Deaconess Med Ctr, Ctr Adv Orthopaed Studies, 330 Brookline Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Perez-Viloria, Miguel
Tevis, Kristie M.
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Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Tevis, Kristie M.
Blessing, William A.
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Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Blessing, William A.
Nazarian, Ara
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Beth Israel Deaconess Med Ctr, Ctr Adv Orthopaed Studies, 330 Brookline Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Nazarian, Ara
Rodriguez, Edward K.
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Beth Israel Deaconess Med Ctr, Ctr Adv Orthopaed Studies, 330 Brookline Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Rodriguez, Edward K.
Grinstaff, Mark W.
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Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
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Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Konieczynska, Marlena D.
Villa-Camacho, Juan C.
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Beth Israel Deaconess Med Ctr, Ctr Adv Orthopaed Studies, 330 Brookline Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Villa-Camacho, Juan C.
Ghobril, Cynthia
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Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Ghobril, Cynthia
Perez-Viloria, Miguel
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Beth Israel Deaconess Med Ctr, Ctr Adv Orthopaed Studies, 330 Brookline Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Perez-Viloria, Miguel
Tevis, Kristie M.
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Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Tevis, Kristie M.
Blessing, William A.
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Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Blessing, William A.
Nazarian, Ara
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机构:
Beth Israel Deaconess Med Ctr, Ctr Adv Orthopaed Studies, 330 Brookline Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Nazarian, Ara
Rodriguez, Edward K.
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机构:
Beth Israel Deaconess Med Ctr, Ctr Adv Orthopaed Studies, 330 Brookline Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Rodriguez, Edward K.
Grinstaff, Mark W.
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机构:
Boston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA
Boston Univ, Dept Biomed Engn, 590 Commonwealth Ave, Boston, MA 02215 USABoston Univ, Dept Chem, 590 Commonwealth Ave, Boston, MA 02215 USA