Bouligand nanocomposites: Self-assembly of cellulose nanocrystals with a thermo-responsive polymer

被引：5

作者：

Vu, Huyen ^{[1
]}

Woodcock, Jeremiah W. ^{[2
]}

Krishnamurthy, Ajay ^{[2
]}

Obrzut, Jan ^{[2
]}

Gilman, Jeffrey W. ^{[2
,3
]}

Coughlin, Bryan ^{[1
]}

机构：

[1] Univ Massachusetts Amherst, Dept Polymer Sci & Engn, Amherst, MA 01003 USA

[2] Natl Inst Stand & Technol, Mat Sci & Engn Div, Gaithersburg, MD USA

[3] Lamtec Corp, 5010 River Rd, Mt Bethel, PA 18343 USA

来源：

POLYMER | 2023年 / 281卷

关键词：

Cellulose nanocrystals; Bouligand; Composites; Thermo-responsive polymer; Photonics; Self-assembly; 2-(2-METHOXYETHOXY)ETHYL METHACRYLATE; IRIDESCENT; FILMS; COLORATION; BRUSHES; WATER;

D O I：

10.1016/j.polymer.2023.126117

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Cellulose nanocrystals (CNCs) naturally self-assemble into helical structures that effectively deflect crack propagation and exhibit structural coloration based on the pitch. To further tune the structural coloration via environmental conditions, a thermoresponsive polymer poly(diethylene glycol methyl methacrylate) (PMEO2MA) was incorporated into CNC composites. Nanocomposite films of PMEO2MA-CNC with 0-30 mass % PMEO2MA loadings were prepared via controlled evaporation-induced self-assembly. As the polymer infiltrates CNCs' helical structure, the resulting films' reflectance wavelength transitions from blue to red. PMEO2MA-CNC nanocomposites exhibited reversible temperature responses in the solid-state between 26 degrees C and 29 degrees C under variable humidity conditions, demonstrating the tunability of the self-assembled films. Fluorescence lifetime imaging microscopy (FLIM) provided insights to polymer dynamics in response to temperature.

引用

页数：8

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