Magnetic Organosilica Nanoparticles for Localized Polymer Surface Modification

被引：11

作者：

Gu, Hongyan ^{[1
]}

Faucher, Santiago ^{[2
]}

Zhu, Shiping ^{[1
]}

机构：

[1] McMaster Univ, Dept Chem Engn, Hamilton, ON L8S 4L7, Canada

[2] Xerox Res Ctr Canada Ltd, Mississauga, ON L5K 2L1, Canada

来源：

MACROMOLECULAR MATERIALS AND ENGINEERING | 2012年 / 297卷 / 03期

关键词：

ATRP; hardness; magnetic nanoparticles; modification; surfaces; POLYHEDRAL OLIGOMERIC SILSESQUIOXANE; TRANSFER RADICAL POLYMERIZATION; PARTICLE-SIZE; POSS; NANOCOMPOSITES; COPOLYMERS; HYBRID; METHACRYLATE; LITHOGRAPHY; MONOMERS;

D O I：

10.1002/mame.201100155

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic organosilica nanoparticles are synthesized by grafting MPB-POSS/MMA-based block copolymers from magnetic iron nanoparticles via surface-initiated ATRP. The hybrid nanoparticles consist of a magnetic iron core and a PMMA/POSS composite shell. A small amount of the nanoparticles is added as smart additive in casting PMMA sheets for localized surface modification. It is demonstrated that the particles are readily brought to the surface of the cast piece by applying a magnet field to the molding. At 1 wt% loading, the sample has a 50-time higher particle content in a 100 mu m-thick surface layer than in the bulk. The indentation hardness of the modified surface is increased by 30%.

引用

页码：263 / 271

页数：9

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