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Full-Text Articles in Engineering

Measurement Of Antibacterial Properties Of Foil‑Backed Electrospun Nanofibers, Mary Ann Wagner-Graham, Herbert Barndt, Mark Andrew Sunderland Nov 2019

Measurement Of Antibacterial Properties Of Foil‑Backed Electrospun Nanofibers, Mary Ann Wagner-Graham, Herbert Barndt, Mark Andrew Sunderland

College of Life Sciences Faculty Papers

Current methodologies for evaluation of antibacterial properties of traditional textiles are not applicable to foil‑backed, poorly‑absorbent electrospun nanofiber materials, since existing test methods require absorbent fabrics. Since electrospun nanofibers are adhered to the foil backing only by electrostatic interactions, methods used to evaluate antibacterial properties of surfaces cannot be used because these protocols cause the nanofibers to lift from the foil backing. Therefore, a novel method for measurement of the antibacterial properties of electrospun metallic foil‑backed nanofiber materials was developed. This method indicated that acetate‑based nanofibers manufactured to contain 5 to 30 weight percent of cold‑pressed hemp seed oil or …


Antibacterial Properties Of Mussel-Inspired Polydopamine Coatings Prepared By A Simple Two-Step Shaking-Assisted Method, Pegah Kord Fooroshani, Elizabeth Polega, Kevin Thomson, Mohammad Saleh Akram Bhuiyan, Rattapol Pinnaratip, Mikhail Trought, Chito E. Kendrick, Yuesheng Gao, Kahryn Perrine, Lei Pan, Bruce P. Lee Sep 2019

Antibacterial Properties Of Mussel-Inspired Polydopamine Coatings Prepared By A Simple Two-Step Shaking-Assisted Method, Pegah Kord Fooroshani, Elizabeth Polega, Kevin Thomson, Mohammad Saleh Akram Bhuiyan, Rattapol Pinnaratip, Mikhail Trought, Chito E. Kendrick, Yuesheng Gao, Kahryn Perrine, Lei Pan, Bruce P. Lee

Michigan Tech Publications

A simple two-step, shaking-assisted polydopamine (PDA) coating technique was used to impart polypropylene (PP) mesh with antimicrobial properties. In this modified method, a relatively large concentration of dopamine (20 mg ml−1) was first used to create a stable PDA primer layer, while the second step utilized a significantly lower concentration of dopamine (2 mg ml−1) to promote the formation and deposition of large aggregates of PDA nanoparticles. Gentle shaking (70 rpm) was employed to increase the deposition of PDA nanoparticle aggregates and the formation of a thicker PDA coating with nano-scaled surface roughness (RMS = 110 …