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Volume: 25 | Article ID: art00013_1
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Charge controlling capability of ultra-thin shell layers formed on a spherical PMMA core particle surface
Takashi Iimura
Osami Abe
Toshihiko Oguchi
  DOI :  10.2352/ISSN.2169-4451.2009.25.1.art00013_1  Published Online :  January 2009
Abstract

Core-shell (C-S) particles having ultra-thin shell layers on the core particle surface are prepared with the coacervation process and their surface structure or tribo-charging characteristics are investigated. Spherical, positively chargeable polymethyl-methacrylate (PMMA) particles having a particle size of approximately 10 μm are used as the core particles. Negatively or positively chargeable ultra-fine particles having a particle size of 3 to 100 nm are used as the shell particles. Through the coacervation process in water, the shell particles are precipitated onto the core particle surface to yield C-S particles. From SEM observation and the blow-off tribo-charge measurements of the CS particles, it is confirmed that (1) an ultra-thin single shell layer having a thickness of less than 20 nm and completely covering the underlying core surface is obtained, (2) the charging characteristics of the C-S particles are governed by the composition of the ultra-thin layer, (3) double shell C-S particles, in which a second ultra-thin shell layer is coated over the single shell C-S particles, are also obtained, (4) the charging characteristics of the double shell C-S particles are governed by the composition of the second ultra-thin shell layer.

Journal Title : NIP & Digital Fabrication Conference
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
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 DOI 10.2352/ISSN.2169-4451.2009.25.1.art00013_1
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Takashi Iimura, Osami Abe, Toshihiko Oguchi, "Charge controlling capability of ultra-thin shell layers formed on a spherical PMMA core particle surface"  in Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP25),  2009,  pp 35 - 38,  https://doi.org/10.2352/ISSN.2169-4451.2009.25.1.art00013_1

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NIP & Digital Fabrication Conference
nip digi fabric conf
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Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA
2169-4451(20090101)2009:1L.35;1-
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Articles
Charge controlling capability of ultra-thin shell layers formed on a spherical PMMA core particle surface
IimuraTakashi
AbeOsami
OguchiToshihiko
01012009
2009
1
35
38
2009
Core-shell (C-S) particles having ultra-thin shell layers on the core particle surface are prepared with the coacervation process and their surface structure or tribo-charging characteristics are investigated. Spherical, positively chargeable polymethyl-methacrylate (PMMA) particles having a particle size of approximately 10 μm are used as the core particles. Negatively or positively chargeable ultra-fine particles having a particle size of 3 to 100 nm are used as the shell particles. Through the coacervation process in water, the shell particles are precipitated onto the core particle surface to yield C-S particles. From SEM observation and the blow-off tribo-charge measurements of the CS particles, it is confirmed that (1) an ultra-thin single shell layer having a thickness of less than 20 nm and completely covering the underlying core surface is obtained, (2) the charging characteristics of the C-S particles are governed by the composition of the ultra-thin layer, (3) double shell C-S particles, in which a second ultra-thin shell layer is coated over the single shell C-S particles, are also obtained, (4) the charging characteristics of the double shell C-S particles are governed by the composition of the second ultra-thin shell layer.