Controlled Amine Functionalization and Hydrophilicity of a Poly(lactic acid) Fabric

Abstract

The surface of PLA fabric has been successfully modified by pulsed plasma polymerization of heptylamine (PPHA) giving increased hydrophilicity and achieving a sufficient level of primary amine functionality (3.5%) for practical application in biotechnology. This is the first report that the density of primary amine (-NH 2 ) in PPHA, quantified by chemical derivatization, can be controlled by selection of pulsed plasma conditions. The duty cycle and the average RF power were the key parameters for achieving both a higher density of primary amine and increased hydrophilicity.

Controlling cell growth on titanium by surface functionalization of heptylamine using a novel combined plasma polymerization mode

“…Plasma polymerization was carried out in a custom‐made inductively coupled radio frequency (RF) (13.56 MHz) plasma reactor,4 in a two‐step procedure. The reaction chamber was a cylindrical glass tube (30‐cm long, 15 cm in diameter).…”

“…This approach has enabled the generation of stable interfaces with a higher density of primary amine functionality on metal, ceramic, and semiconductor surfaces. Based on our previous work, heptylamine was used as the monomer due to its lower toxicity and because a more stable monomer pressure was achieved in comparison with allylamine 4. In addition a sufficient level of amino functional groups for the intended biological application was also achieved 4, 5.…”

“…Based on our previous work, heptylamine was used as the monomer due to its lower toxicity and because a more stable monomer pressure was achieved in comparison with allylamine 4. In addition a sufficient level of amino functional groups for the intended biological application was also achieved 4, 5. The stability of the primary amine levels was quantified by derivatization with trifluoromethyl benzaldehyde (TFBA), followed by X‐ray photoelectron spectroscopy (XPS).…”

Surface wetting processing on BNNT films by selective plasma modes

“…From SEM images, there were no changes of physical structure, and the contact angle reduced to 152.5°±2.8°. The acceptable decrease due to possible polar oxygen functional groups introduced either impurity in Ar plasma process or exposed in atmospheric after activity [32,34].…”

“…The reactor could be carried out continuous wave as well as pulsed mode [32]. The reaction chamber was a cylindrical glass tube, and the samples were located in the middle area of plasma source.…”