Synergistic Thermoresponsive Optical Properties of a Composite Self-Healing Hydrogel

被引:65
作者
Owusu-Nkwantabisah, Silas [1 ]
Gillmor, Jeffrey [2 ]
Switalski, Steven [2 ]
Mis, Mark R. [1 ]
Bennett, Grace [1 ]
Moody, Roger [2 ]
Antalek, Brian [2 ]
Gutierrez, Robledo [2 ]
Slater, Gary [2 ]
机构
[1] Eastman Kodak Co, Kodak Res Labs, 1999 Lake Ave, Rochester, NY 14650 USA
[2] Eastman Kodak Co, Tech Solut Div, 1999 Lake Ave, Rochester, NY 14650 USA
关键词
PHASE-TRANSITION; POLY(N-ISOPROPYLACRYLAMIDE); PNIPAM; LCST; NANOPARTICLES; DENATURATION; FLUORESCENCE; DISPLAY; UREA;
D O I
10.1021/acs.macromol.7b00355
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
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.
引用
收藏
页码:3671 / 3679
页数:9
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