Pulsed‐Plasma Polymeric Allylamine Thin Films

Abstract

High surface functional groups concentration, excellent dynamical stability and mechanical properties are ideal for biomedical plasma polymers. Herein, we report a simple and effective approach to fabricating such an ideal plasma polymeric allylamine film on 316L stainless steel (SS) by pulsed plasma polymerization. The experimental results show that the concentration of the primary amine groups (NH2/C) of the plasma polymeric allylamine film was 2.4 ± 0.4%. The plasma polymeric allylamine film possesses not only high surface NH2 concentration, but also high cross‐linking degree and close‐knit network structure that could well resist hydrolysis, and dissolution in the aqueous solution. Furthermore, the plasma polymeric allylamine film was used as a stent coating that shows a good resistance to the deformation behaviour of compression and expansion of the stent.

Bioactive Plasma‐Polymerized Bipolar Films for Enhanced Endothelial Cell Mobility

“…The origin of the oxygen of the PPAam film can be from post-deposition reactions of the plasma polymers exposed to the air or from direct incorporation with residual oxygen from the vacuum reactor during the plasma polymerization. [18,27,28] High-resolution C 1s (Figure 2A), N 1s ( Figure 2B), and O 1s ( Figure 2C) spectra presented powerful evidence for the presence of ÀNH þ 3 and ÀCOOÀ polar entities. In contrast to the atomic composition of pure PPAam or PPAac films and both composite films, the high-resolution XPS spectra revealed drastic difference between them in terms of chemical bonding.…”

Effect of plasma surface functionalization on preosteoblast cells spreading and adhesion on a biomimetic hydroxyapatite layer formed on a titanium surface

“…Intense bands at 1119 and 1021, 564 cm −1 , and a weak band at 975 cm −1 can be observed in (b; HAp/Ti), (c; COOH/HAp/Ti) and (d; NH 2 /HAp/Ti), which correspond to the P O stretching vibration modes, and the bands at 605 and 564 cm −1 correspond to the O P O bending mode [22]. The peak at 1713 cm −1 in (c; COOH/HAp/Ti) corresponds to the carboxyl group of PPAAc, and the peak at 3200-3350 cm −1 and 1630 cm −1 in (d; NH 2 /HAp/Ti) corresponds to the amine group on the PPAAm thin film present on the HAp/Ti substrate [23,24]. These results show that the chemical surface functionality of interest was present on the modified HAp/Ti substrates, respectively.…”

A Novel Technique Toward Bipolar Films Containing Alternating Nano–Layers of Allylamine and Acrylic Acid Plasma Polymers for Biomedical Application

“…The elemental and atomic compositions of pure PPAam and pure PPAac films (Table 2) show a good retention of chemical structure of monomers, and are consistent with the results of FTIR. The oxygen in the PPAam film may come from post‐deposition reactions of the plasma polymers with the air, or from direct incorporation with residual oxygen in the vacuum reactor during the plasma polymerization 4, 14…”

“…Due to its ability of providing homogeneous and pinhole free films with good surface coverage and functional groups, plasma polymerization is proven to be a versatile approach to the deposition of polymer‐like materials. It thus becomes a topic of high interest in the surface modification of various substrates 3, 6, 14–17. An intentional and defined grafting of the biomedical material surface with highly positive/negative charges produced by protonated/deprotonated functional groups is desirable for special biomedical applications.…”