title: Non-stick syringe needles: Beneficial effects of thin film metallic glass coating.
abstract: This paper reports on the use of Zr-based (Zr53Cu33Al9Ta5) thin film metallic glass (TFMG) for the coating of syringe needles and compares the results with those obtained using titanium nitride and pure titanium coatings. TFMG coatings were shown to reduce insertion forces by ∼66% and retraction forces by ∼72%, when tested using polyurethane rubber block. The benefits of TFMG-coated needles were also observed when tested using muscle tissue from pigs. In nano-scratch tests, the TFMG coatings achieved a coefficient of friction (COF) of just ∼0.05, which is about one order of magnitude lower than those of other coatings. Finite-element modeling also indicates a significant reduction in injection and retraction forces. The COF can be attributed to the absence of grain boundaries in the TFMG coating as well as a smooth surface morphology and low surface free energy.
authors: Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
authors: Jinn P
authors: JP
authors: Chu
authors: Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
authors: Chia-Chi
authors: CC
authors: Yu
authors: Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.|Department of Chemical Science and Technology, Tokushima University, Tokushima 770-8506, Japan.
authors: Yusuke
authors: Y
authors: Tanatsugu
authors: Department of Chemical Science and Technology, Tokushima University, Tokushima 770-8506, Japan.
authors: Mikito
authors: M
authors: Yasuzawa
authors: Department of Mechanical Engineering, University of New Mexico, Albuquerque, NM 87131, USA.
authors: Yu-Lin
authors: YL
authors: Shen