Academic Journals Database
Disseminating quality controlled scientific knowledge

ELECTROLESS NICKEL DEPOSITION ON FRAXINUS MANDSHURICA VENEER MODIFIED WITH APTHS FOR EMI SHIELDING

ADD TO MY LIST
 
Author(s): Haibing Liu | Lijuan Wang

Journal: BioResources
ISSN 1930-2126

Volume: 5;
Issue: 4;
Start page: 2040;
Date: 2010;
Original page

Keywords: Electroless nickel plating | Activation | γ-aminopropylhydroxysilane | Fraxinus Mandshurica veneer | Shielding effectiveness

ABSTRACT
Electroless nickel deposition was carried out on Fraxinus mandshurica veneers for EMI shielding under a new activation process. In the process, Pd(II) was absorbed on the surface of veneers modified with γ-aminopropyltrihydroxysilane (APTHS) obtained from the hydrolysis of γ-aminopropyltriethoxysilane (APTES). After the reduction, electroless plating was successfully initiated, and Ni-P coating was deposited on the veneers. The activation process and resulting coating were characterized by XPS, SEM-EDS, and XRD. The metal deposition, surface resistivity, and electromagnetic shielding effectiveness were measured. XPS analysis proved that Pd(II) was bonded to the amino group of APTHS and reduced to Pd(0). The coating was continuous, uniform, and compact. It consisted of 97.4 wt% nickel and 2.6 wt% phosphorus. XRD analysis showed that the coating was crystalline, which was related to the low phosphorus content. The plated Fraxinus mandshurica veneers exhibit good electro-conductivity with surface resistivity of 0.21Ω•cm-2 and higher electromagnetic shielding effectiveness of over 50dB in frequencies from 10 MHz to 1.5 GHz.

Tango Rapperswil
Tango Rapperswil

     Affiliate Program