Physicochemical- and biocompatibility of oxygen and nitrogen plasma treatment using a PLA scaffold

Davoodi, Ali; Zadeh, Homayoun H.; Joupari, Morteza Daliri; Sahebalzamani, Mohammadali; Khani, Mohammad Reza; Shahabi, Sima

doi:10.1063/5.0022306

Cited by 13 publications

(11 citation statements)

References 38 publications

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“…Jordá-Vilaplana et al ( 2014) found a similar result for PLA with both O/C and N/C ratio increasing as a result of atmospheric plasma treatment. Slepička et al (2012) found that the O/C increased for poly-(4-methyl-1-pentene) (PMP) treated using an Ar plasma treatment from 0.003 for untreated to 0.401 following treatment at 8 W for 240 s. An increase in O/C and N/C ratio was also observed for oxygen and nitrogen, low pressure, non-thermal plasma treated PLA films (Davoodi et al, 2020).…”

Section: Resultsmentioning

confidence: 94%

Plasma treatment process for accelerating the disintegration of a biodegradable mulch film in soil and compost

Bhattacharya,

Kansara,

Lodge

et al. 2023

Front. Mater.

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Biodegradable Mulch Films (BMFs) offer a sustainable alternative to traditional non-degradable (Polyethylene) PE mulch films. However, their slow rate of biodegradation can lead to plastics accumulation in soil. In this study, a commercially available BMF based on poly (butylene adipate co-terephthalate) (PBAT) and poly (lactic acid) (PLA) is examined. Here the effects of gliding arc plasma treatment on the bulk and surface properties, as well as its degradation behavior in soil and compost is studied. An increase in surface oxygen containing species and hydrophilicity was observed following plasma treatment. Only a small hydrophobic recovery was noted over 30 days. No changes in the bulk polymer molecular weight or thermal properties following treatment were noted. However, a decrease in mechanical strength was observed following gliding arc plasma treatment. The onset of film fragmentation in both soil and compost occurred earlier for a plasma treated film and we attribute this to an improvement in the initial adhesion of bacteria on the surface.

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Section: Resultsmentioning

confidence: 94%

Plasma treatment process for accelerating the disintegration of a biodegradable mulch film in soil and compost

Bhattacharya,

Kansara,

Lodge

et al. 2023

Front. Mater.

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“…This might explain why the PLA-2 polar groups get bigger. These newly formed bonds were characterized by activated functional groups, including carbonyl, carboxyl, and hydroxyl groups . It was possible to cut the long PLA-3 polymer chain by using an alkaline catalyst to break down PLA .…”

Section: Resultsmentioning

confidence: 99%

“…These newly formed bonds were characterized by activated functional groups, including carbonyl, carboxyl, and hydroxyl groups. 32 It was possible to cut the long PLA-3 polymer chain by using an alkaline catalyst to break down PLA. 33 Furthermore, treatment with DES induced a greater degree of bond cleavage (Figure 1).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Hydrophilic Modification of Polylactic Acid Fiber and the Usage of Natural Dye for Multi-Levered Improvement of the Fabric Staining Depth and the Stability Effect

Li,

Yang,

et al. 2024

Langmuir

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Polylactic acid (PLA) fiber is a degradable material with good environmental friendliness for textile applications. However, the main problems of difficult dyeing of PLA fibers were: high crystallinity to the adsorption of dyes, more ester and methyl groups producing non-hydrophilic problems, long chains making dyes difficult to penetrate, and producing a low dyeing rate. Here, we attempted to change the crystallinity of the PLA fiber to a lower degree from hydrophobic to hydrophilicity property variation, destroy the long chain structure to grant more staining sites, and improve the PLA fiber staining depth and the resilience dyeing effect with deep eutectic solvent (DES) treatment and natural dyes. We discovered that a controlled DES treatment process could make PLA fibers less crystallized, help amorphous areas form, and break up long chains, which lead to more dye sites. After DES treatment, the crystallinity decreased from 56.12 to 29.86%, and the instantaneous water contact angle decreased from 108.79 to 64.39°. The DES-treated PLA fabric exhibited a higher K/S value of 15.14 for natural dyes under specific conditions. The fabric, which had remarkable fastness characteristics and wash resistance, could endure frequent laundering and fulfill the demands of everyday use. Moreover, the fabric had good antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Candida albicans and possessed a certain level of biocompatibility with fibroblasts. This DES treatment and natural dye combination method offered a new strategy for improving PLA fabric staining depth and color fastness, making it a promising option for low-carbon environmental protection in the textile industry.

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“…The O1s spectrum of PLA untreated and treated samples can be decomposed into two peaks, attributed to the C−O and CO bonds. [ 34,35 ] The N1s spectrum of both samples could be decomposed into two, assigned to imine groups (CN) and amine groups (C−N). [ 36 ] However, the O 2 EDA treatment yielded a much higher concentration of amines when compared with PLA_NH 3 plasma‐treated samples, which corroborates the results obtained in the Orange II method and by fuchsin acid dye.…”

Section: Resultsmentioning

confidence: 99%

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

Peixoto

Silva

Rodrigues

et al. 2022

Macro Materials & Eng

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Several polymers are researched for tendon repair as polyethylene terephthalate (PET) and polylactic acid (PLA). These are biocompatible and useful in scaffolding repair though with minimal success due to long-term failure. There is a need to improve such scaffolds' design and physical-chemical nature. This work concerns surface functionalization of polymeric braids (PET and PLA) that fulfill the high mechanical demands of tissues such as tendons. The functionalization aims to incorporate amine groups in the braids' surface, improve cell adhesion, and consequently, the poor healing rate of these tissues and the biointegration of the braids. Two approaches are compared: the direct application of NH 3 plasma and the surface grafting of EDA after O 2 plasma activation. X-ray photoelectron spectroscopy (XPS) shows that amine groups are effectively introduced onto the samples' surfaces. Besides, the plasma parameters chosen do not compromise the topography and tensile behavior of the braids. Resazurin assay and scanning electron microscopy show that the NH 3 treatment improves cell-biomaterial interaction as improved cell adhesion and proliferation are observed. Both approaches are safe for biomedical applications. The NH 3 plasma approach is more environmentally friendly, faster, and easier to scale-up, showing potential for application in the final hybrid medical device.

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Physicochemical- and biocompatibility of oxygen and nitrogen plasma treatment using a PLA scaffold

Cited by 13 publications

References 38 publications

Plasma treatment process for accelerating the disintegration of a biodegradable mulch film in soil and compost

Plasma treatment process for accelerating the disintegration of a biodegradable mulch film in soil and compost

Hydrophilic Modification of Polylactic Acid Fiber and the Usage of Natural Dye for Multi-Levered Improvement of the Fabric Staining Depth and the Stability Effect

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

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