An Optimized Two-Step Nitrogen-Based Plasma Treatment Procedure under Atmospheric-Pressure Condition and its Surface Amination Mechanism

Abstract

Atmospheric pressure nitrogen‐based dielectric barrier discharge (DBD) jet with two‐step plasma treatment procedure has been verified to be very effective in facilitating nitrogen‐containing group incorporation on Polylactide (PLA) surface. It includes: 1) pretreatment plasma treatment by a nitrogen discharge with a trace amount of oxygen, and 2) ammonia plasma treatment by a nitrogen discharge with a small amount of ammonia. In this study, the optimized operation condition of two‐step plasma procedure is investigated under different concentrations of added gases (0–1% oxygen; 0–10% ammonia). XPS analysis shows that ∼0.19 of N/C ratio can be achieved by means of the optimized two‐step plasma procedures. Furthermore, a surface amination mechanism is proposed based on the observations of Optical Emission Spectra (OES), Atomic Force Microscope (AFM), and X‐ray Photoelectron Spectra (XPS) analyses.

Amination of Polymeric Braid Structures to Improve Tendon Healing: An Experimental Comparison

“…The C1s spectra of PLA were deconvoluted into three peaks: 285 eV, which may be attributed to C-C and C-H bonds, 286.6 eV (C−O), and 289.3 eV (O=C−O). [31][32][33] After NH 3 plasma and O 2 EDA treatment, the characteristic peaks of PLA are still visible, with slight energy shifts and different peak widths, due to the evident incorporation of nitrogen on the PLA surface. The O1s spectrum of PLA untreated and treated samples can be decomposed into two peaks, attributed to the C−O and C=O bonds.…”

Processing, Characterization, and in Vivo Evaluation of Poly(l-lactic acid)-Fish Gelatin Electrospun Membranes for Biomedical Applications

“…Different strategies had been applied to modify the surface properties of synthetic polymers, either by chemical or physical treatments. Chemical methods usually damage both the surface and the bulk of the material and generate chemical wastes, while plasma treatments are only effective at the surface of the material, but sample size is limited to the laboratorial scale. , Synthetic polymers blended with natural ones, is a milder and more effective way of improving overall hydrophilicity and thus increasing cell-polymer interaction …”

“…Chemical methods usually damage both the surface and the bulk of the material and generate chemical wastes, 23 while plasma treatments are only effective at the surface of the material, but sample size is limited to the laboratorial scale. 23,24 Synthetic polymers blended with natural ones, is a milder and more effective way of improving overall hydrophilicity and thus increasing cell-polymer interaction. 25 Gelatin is a collagen-derived biocompatible and biodegradable polymer, which is also available from nonmammalian sources.…”

An intensified atmospheric plasma-based process for the isolation of the chitin biopolymer from waste crustacean biomass

“…), which can break various carbon-carbon or carbon-hydrogen bonds. 24 Additionally, the breakage of the surface bonds can yield various excited radical species such as atomic H or OH radicals. The experimental and theoretical studies on the generation and detection of such species in various plasmas can be found elsewhere.…”

“…The experimental and theoretical studies on the generation and detection of such species in various plasmas can be found elsewhere. 24,25 The effects of various plasma feed gas compositions on etching rates were measured in terms of percentage of mass removed from the sample and are presented in Fig. 1A.…”