Electroless plating on the surface of kapok fibres: analysis of an effective palladium-free nickel salt activation process

The chitosan derivatives(S-CTS and RS-CTS) were prepared and the application of the derivatives in surface activation process for Ni electroless plating was exploited. S-CTS was prepared by shiff-base reaction of CTS with salicylic aldehyde and RS-CTS was prepared by reduction reaction of S-CTS with KBH4. The results of FT-IR spectroscopic characterization showing the formation of C＝N in S-CTS and C－N in RS-CTS indicated that the above reactions occurred in the supposed route. The thermal properties of the derivatives were studied by Thermogravimetry-Differential thermal analysis (TG-DTA) methods. It is suggested that the thermal stabilities of CTS derivatives were better than that of CTS. Furthermore, RS-CTS is capable of forming even films on ABS surface and adsorbing adequate Ni nano-catalysts for follow-up electroless plating. Optic tight and dense plating layers were finally obtained. It is showed that RS-CTS could be applied as a biopolymer film in activation process for electroless plating.

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Research on Electroless Plating of Poly (Ethylene Terephthalate) Films by a New Palladiumfree Activation Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.750-752.1954 ◽

2013 ◽

Vol 750-752 ◽

pp. 1954-1956

Author(s):

Chun Wu ◽

Wen Xin Ma ◽

Ya Ping Chen ◽

Yin Li ◽

Yan Chen

Keyword(s):

Electroless Plating ◽

Ethylene Terephthalate ◽

Activation Process ◽

Surface Activation ◽

Chemical Surface ◽

Poly Ethylene Terephthalate ◽

Nickel Particles ◽

Poly Ethylene ◽

Pet Film ◽

Pet Films

In this essay the authors are seeking to examine a chemical surface activation process for NiP electroless plating of poly (ethylene terephthalate) (PET) films without using palladium catalyst, during which the nickel particles have been chelated with the C=O and COH groups of the carboxymethyl cellulose (CMC) on the PET film that are acting as a catalyst center for the electroless plating.

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A new palladium-free surface activation process for Ni electroless plating on ABS plastic

Materials Letters ◽

10.1016/j.matlet.2009.01.006 ◽

2009 ◽

Vol 63 (11) ◽

pp. 840-842 ◽

Cited By ~ 54

Author(s):

Xuejiao Tang ◽

Chengliang Bi ◽

Changxiu Han ◽

Baogui Zhang

Keyword(s):

Free Surface ◽

Electroless Plating ◽

Activation Process ◽

Surface Activation

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SEM and Auger microanalysis studies of Cu-Be dynode surfaces at each activation condition

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100109768 ◽

1978 ◽

Vol 36 (1) ◽

pp. 524-525

Author(s):

T. Koshikawa ◽

Y. Fujii ◽

E. Sugata ◽

F. Kanematsu

Keyword(s):

Electron Emission ◽

Secondary Electron ◽

Secondary Electron Emission ◽

Life Time ◽

Activation Process ◽

Beam Diameter ◽

Activation Temperature ◽

Electron Multiplier ◽

Activation Condition ◽

Activation Conditions

The Cu-Be alloys are widely used as the electron multiplier dynodes after the adequate activation process. But the structures and compositions of the elements on the activated surfaces were not studied clearly. The Cu-Be alloys are heated in the oxygen atmosphere in the usual activation techniques. The activation conditions, e.g. temperature and O2 pressure, affect strongly the secondary electron yield and life time of dynodes.In the present paper, the activated Cu-Be dynode surfaces at each condition are investigated with Scanning Auger Microanalyzer (SAM) (primary beam diameter: 3μmϕ) and SEM. The commercial Cu-Be(2%) alloys were polished with Cr2O3 powder, rinsed in the distilled water and set in the vacuum furnance.Two typical activation condition, i.e. activation temperature 730°C and 810°C in 5x10-3 Torr O2 pressure were chosen since the formation mechanism of the BeO film on the Cu-Be alloys was guessed to be very different at each temperature from the results of the secondary electron emission measurements.

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The Binding of Calcium Ions to Bovine Factor X by Rate Dialysis

Thrombosis and Haemostasis ◽

10.1055/s-0038-1648668 ◽

1978 ◽

Vol 40 (02) ◽

pp. 350-357

Author(s):

Robert H Yue ◽

Menard M Gertler

Keyword(s):

Molecular Weight ◽

Dissociation Constant ◽

Calcium Ions ◽

Activation Process ◽

Factor X ◽

The Real ◽

High Affinity ◽

Binding Data ◽

Sequential Mechanism ◽

Bovine Factor

SummaryThe binding of Ca+2 to bovine factor X (molecular weight of 74,000) (Yue und Gertler 1977) was studied by the technique of rate dialysis and with the use of 45Ca+2. The binding data are consistent with a model of sequential mechanism. One mole of Ca+2 binds to the glycoprotein with a dissociation constant of 5.2 × 10-5 M and an additional 39 ± 4 moles of Ca+2 bind to this zymogen with a dissociation constant of 3.7 × 10-3M. The binding of the high affinity Ca+2 causes a functionally significant change in the zymogen, and (calcium) (factor X) complex is the real substrate in the activation process by the protease in Russell’s viper venom.

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