Synthesis and characterization of gibbsite nanoplatelet brushes by surface-initiated atom transfer radical polymerization

POLYMER

卷:126

Article

Zhang, Jianan^1,2,3  Lee, Jaejun¹  Wang, Zongyu²  Yan, Jiajun²  Lu, Zhao¹  Liu, Siyuan¹  Luo, Danli¹  Matyjaszewski, Krzysztof^2,4  Bockstaller, Michael R.¹ 

[1] Carnegie Mellon Univ, Dept Mat Sci & Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA

[2] Carnegie Mellon Univ, Dept Chem, 4400 Fifth Ave, Pittsburgh, PA 15213 USA

[3] Anhui Univ, Sch Chem & Chem Engn, Hefei 230601, Anhui, Peoples R China

[4] Lodz Univ Technol, Dept Mol Phys, PL-90924 Lodz, Poland

关键词: ATRP;    Brush;    Nanocomposite;    Particle;    Nano platelet;    Nacre;    Self-assembly;   

DOI  :  10.1016/j.polymer.2017.08.028

来源: Elsevier

【 摘 要 】

An efficient method for the polymer modification of gibbsite (gamma-Al(OH)(3)) nanoplatelet particles with poly(methyl methacrylate) (PMMA) by surface-initiated atom transfer radical polymerization (SI-ATRP) was developed. A newly developed initiator system based on 12-(2-bromoisobutyramido) dodecanoic acid (BiBADA) enable grafting densities in excess of 0.4 nm(-2) with minimal amount of free homopolymer impurities and narrow molecular weight distribution. The gibbsite brush nanoplatelets were shown to organize into transparent films with nacre-like lamellae morphology. A significant increase of the glass transition temperature (as compared to pristine PMMA) was observed and attributed to the increase of steric confinement in planar brush architectures. The applicability of the presented methodology to a wide range of ATRP-compatible chemistries could be a basis for the development of novel functional materials in which properties depend on the directionality of brush nanoplatelet orientation and interaction. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

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