Grafting PMMA Brushes from α-Alumina Nanoparticles via SI-ATRP

被引：42

作者：

Khabibullin, Amir ^{[1
]}

Bhangaonkar, Karan ^{[1
]}

Mahoney, Clare ^{[2
]}

Lu, Zhao ^{[2
]}

Schmitt, Michael ^{[2
]}

Sekizkardes, Ali Kemal ^{[3
]}

Bockstaller, Michael R. ^{[2
]}

Matyjaszewski, Krzysztof ^{[1
]}

机构：

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

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

[3] US DOE, NETL, 626 Cochrans Mill Rd, Pittsburgh, PA 15129 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 08期

基金：

美国国家科学基金会;

关键词：

SI-ATRP; hybrid materials; alpha-alumina; polymer brushes; poly(methyl methacrylate); grafting density; TRANSFER RADICAL POLYMERIZATION; HYBRID MATERIALS; NANOCOMPOSITES; SURFACES; COMPOSITES; MEMBRANES; BEHAVIOR;

D O I：

10.1021/acsami.5b12311

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Alumina nanoparticles are widely used as nano fillers for polymer nanocomposites. Among several different polymorphs of alumina, alpha-alumina has the most desirable combination of physical properties. Hence, the attachment of polymer chains to alpha-alumina to enhance compatibility in polymeric matrixes is an important goal. However, the chemical inertness and low concentration of surface hydroxyl groups have rendered polymer modification of alpha-alumina a long-standing challenge. Herein, we report that activation of a-alumina in concentrated or molten NaOH as well as in molten K2S2O7 increased polymer graft density up to 50%, thereby facilitating the synthesis of alpha-alumina brush particles with uniform grafting density of 0.05 nm(-2) that are readily miscible or dispersible in organic solvents or in chemically compatible polymeric hosts.

引用

页码：5458 / 5465

页数：8

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