Effect of Polymer Substrate on Adhesion of Electroless Plating in Irradiation-Based Direct Immobilization of Pd Nanoparticles Catalyst

• Published in: Nanomaterials (Basel, Switzerland) Vol. 12; no. 22; p. 4106
• Main Authors: Uegaki, Naoto, Seino, Satoshi, Ohkubo, Yuji, Nakagawa, Takashi
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 21.11.2022; MDPI
• Subjects: Acrylonitrile; Adhesion; adhesion strength; Adhesive strength; Analysis; Aqueous solutions; Catalysts; Chemical etching; Chemical reactions; Copolymers; Cu plating; Electroless plating; Etching; Identification and classification; Immobilization; Influence; Irradiation; Mechanical properties; Methods; modification; Nanoparticles; Nitrates; Palladium; Palladium catalysts; Pd nanoparticles; Photoelectron spectroscopy; Photoelectrons; Plating; Polyethylenes; Polymers; Polyphenylene sulfides; Polypropylene; Polystyrene; Polystyrene resins; Polyvinyl chloride; Radiation; Scanning electron microscopy; Spectrum analysis; Structure; Styrene; Styrenes; Substrates; Vinyl chloride; X-ray spectroscopy; Japan; Cu plating; Pd nanoparticles; adhesion strength; radiation; modification
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano12224106

Pd nanoparticles were directly immobilized on acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene copolymer (AS), polystyrene (PS), polyphenylene sulfide (PPS), poly(vinyl chloride) (PVC), polypropylene (PP), and polyethylene (PE) polymer substrates via chemical reactions induced by ionizing irradiation. X-ray photoelectron spectroscopy analysis revealed that the chemical state of the immobilized Pd nanoparticles depended on the polymer substrate type. Electroless plating was performed using the immobilized Pd nanoparticles as the catalyst, and Cu-plating films were deposited on all polymer substrates. The results of the tape-peeling test suggested that the chemical state of the immobilized Pd nanoparticles on the polymer substrates affected the plating adhesion strength. Notably, ABS with immobilized Pd particles exhibited a high adhesion strength beyond the practical level, even without prior chemical etching. It was presumed that the high adhesion strength was owing to the anchoring effect of the holes generated on the ABS surface by ionizing irradiation.