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

来源：

MACROMOLECULES | 2017年 / 50卷 / 09期

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

页码：3671 / 3679

页数：9

共 31 条

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