scholarly journals Synthesis and Properties of Plasma-Polymerized Methyl Methacrylate via the Atmospheric Pressure Plasma Polymerization Technique

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 396 ◽  
Author(s):  
Choon-Sang Park ◽  
Eun Jung ◽  
Hyo Jang ◽  
Gyu Bae ◽  
Bhum Shin ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Secondary Ion Mass Spectrometry ◽  
Atmospheric Pressure Plasma ◽  
Thickness Measurement ◽  
Water Contact ◽  
Pressure Plasma ◽  
Measurement Results ◽  
The Fourier Transform

Pinhole free layers are needed in order to prevent oxygen and water from damaging flexible electrical and bio-devices. Although polymerized methyl methacrylate (polymethyl methacrylate, PMMA) for the pinhole free layer has been studied extensively in the past, little work has been done on synthesizing films of this material using atmospheric pressure plasma-assisted electro-polymerization. Herein, we report the synthesis and properties of plasma-PMMA (pPMMA) synthesized using the atmospheric pressure plasma-assisted electro-polymerization technique at room temperature. According to the Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and time of flight-secondary ion mass spectrometry (ToF-SIMS) results, the characteristic peaks from the pPMMA polymer chain were shown to have been detected. The results indicate that the percentage of hydrophobic groups (C–C and C–H) is greater than that of hydrophilic groups (C–O and O–C=O). The field emission-scanning electron microscope (FE-SEM) and thickness measurement results show that the surface morphology is quite homogenous and amorphous in nature, and the newly proposed pPMMA film at a thickness of 1.5 µm has high transmittance (about 93%) characteristics. In addition, the results of water contact angle tests show that pPMMA thin films can improve the hydrophobicity.

Ethanol Pretreatment on Etching of Nylon 6 Films Using Atmospheric Pressure Plasma

2015 ◽  
Vol 1120-1121 ◽  
pp. 593-598
Author(s):  
Qiu Yuan Xiong
Keyword(s):  
Plasma Treatment ◽  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Sample Surface ◽  
Nylon 6 ◽  
Peel Strength ◽  
Water Contact ◽  
Pressure Plasma ◽  
Ethanol Pretreatment

The absorbed liquids in the substrate material may have a potential influence on atmospheric pressure plasma treatment. In order to investigate how the influence of ethanol pretreatment affects atmospheric pressure plasma treatment, nylon 6 films were treated by helium/oxygen plasma using atmospheric pressure plasma jet (APPJ). Water contact angle of the ethanol pretreated samples was close to that of the control. Scanning electron microscopy (SEM) showed that the ethanol pretreated sample surface had a little change on the surface. X-ray photoelectron spectroscopy (XPS) showed that the carbon component decreased and the oxygen component increased after plasma treatment. With the ethanol pretreatment, the T-peel strength values for the samples were similar to that of the control.

scholarly journals In Situ Surface Modification of Paper-Based Relics with Atmospheric Pressure Plasma Treatment for Preservation Purposes

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 786
Author(s):  
Xu Yan ◽  
Guo-Sai Liu ◽  
Jing Yang ◽  
Yi Pu ◽  
Shuo Chen ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Good Method ◽  
Contact Angles ◽  
Water Penetration ◽  
Water Contact ◽  
Pressure Plasma ◽  
Static Water

Paper-based relics, which are an important part of cultural heritage worldwide, are at risk of imminent damage from various environmental sources. To protect them, the atmospheric pressure plasma polymerization of hexamethyldisiloxane (HMDSO) precursor has been explored on paper-based relics in situ. The macro and micro images taken during this process suggest that the in situ plasma treatment does not change the macro morphology and the micro structure of the treated paper-based relic samples. On the other hand, plasma treatment causes the polymerization of the HMDSO which then produces nanoparticles deposited onto the paper-based relics. These nanoparticles provide good waterproof properties with large static water contact angles and smaller rolling angles, which protect the paper-based relics from water penetration. Moreover, since the nanoparticles are deposited onto the fibers, waterproof fastness is ensured. Also, the examined mechanical properties of the treated and untreated paper-based relics indicate that the atmospheric pressure plasma treatment does not affect the strength of the paper very much. The results in this study show that atmospheric pressure plasma treatment with the use of HMDSO precursor is a good method to preserve paper-based relics.

High Speed Surface Modification in Fine-Pitch Package Substrate Manufacturing Process with High Density 60 Hz Nonequilibrium Atmospheric Pressure Plasma

2012 ◽  
Vol 1401 ◽  
Author(s):  
Yoshiyuki Iwata ◽  
Hajime Sakamoto ◽  
Keigo Takeda ◽  
Masaru Hori
Keyword(s):  
Surface Modification ◽  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
High Speed ◽  
Vacuum Ultraviolet ◽  
Atmospheric Pressure Plasma ◽  
Oxygen Radical ◽  
Material Surface ◽  
Mixing Ratio ◽  
Pressure Plasma

ABSTRACTThis study examined surface modification of solder resist and dry film resist using 60 Hz nonequilibrium atmospheric pressure plasma with O2/N2 mixing gas. Results show that the plasma discharge condition at O2/N2 mixing ratio of 0.1% was the best for surface modification for both materials, and the surfaces were modified sufficiently at 0.45 m/min package substrate transportation speed. From the plasma diagnostics by Vacuum Ultraviolet Absorption Spectroscopy (VUVAS) and Optical Emission Spectroscopy (OES), it was found that the behaviors of the oxygen radical density and NO-γ emission intensity correlate strongly with surface modification. The extremely high oxygen radical density around 4.7 × 1013 cm-3 was obtained at O2/N2 mixing ratio of 0.1%. The electron density was 2.5 × 1015 cm-3 that is two digits more than that of the conventional atmospheric pressure plasma such as Dielectric Barrier Discharge (DBD). The solder resist surface with the plasma treatment was analyzed by X-ray Photoelectron Spectroscopy (XPS), and it was clarified that material surface was modified by hydrophilic group generation owing polymer chain oxidation with oxygen radical.

scholarly journals Assessment of Atmospheric Pressure Plasma Treatment for Implant Osseointegration

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Natalie R. Danna ◽  
Bryan G. Beutel ◽  
Nick Tovar ◽  
Lukasz Witek ◽  
Charles Marin ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Physicochemical Characterization ◽  
Atmospheric Pressure Plasma ◽  
Canine Model ◽  
Pressure Plasma ◽  
Model Control ◽  
Bone To Implant Contact ◽  
Control Surfaces

This study assessed the osseointegrative effects of atmospheric pressure plasma (APP) surface treatment for implants in a canine model. Control surfaces were untreated textured titanium (Ti) and calcium phosphate (CaP). Experimental surfaces were their 80-second air-based APP-treated counterparts. Physicochemical characterization was performed to assess topography, surface energy, and chemical composition. One implant from each control and experimental group (four in total) was placed in one radius of each of the seven male beagles for three weeks, and one implant from each group was placed in the contralateral radius for six weeks. After sacrifice, bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO) were assessed. X-ray photoelectron spectroscopy showed decreased surface levels of carbon and increased Ti and oxygen, and calcium and oxygen, posttreatment for Ti and CaP surfaces, respectively. There was a significant(P<0.001)increase in BIC for APP-treated textured Ti surfaces at six weeks but not at three weeks or for CaP surfaces. There were no significant(P=0.57)differences for BAFO between treated and untreated surfaces for either material at either time point. This suggests that air-based APP surface treatment may improve osseointegration of textured Ti surfaces but not CaP surfaces. Studies optimizing APP parameters and applications are warranted.

Surface Quality Prediction of Atmospheric Pressure Plasma Arc Cleaning Based on Least Square Support Vector Machine

2013 ◽  
Vol 813 ◽  
pp. 460-464
Author(s):  
Zhan Min Yin ◽  
Xiao Juan Dong ◽  
Jian Bing Meng
Keyword(s):  
Surface Quality ◽  
Atmospheric Pressure ◽  
Orthogonal Experiment ◽  
Atmospheric Pressure Plasma ◽  
Processing Parameters ◽  
Least Square ◽  
Support Vector ◽  
Plasma Arc ◽  
Water Contact ◽  
Pressure Plasma

The theory of Least Squares Support Vector Machines was applied to metal surfaces cleaning by atmospheric pressure plasma arc. An intelligent predictive model of the non-linear relationship between cleaning quality and process parameters was established with the k-fold cross training of sample data. An orthogonal experiment was conducted to assess the effect of processing parameters on surface quality. The experimental results and predicted values show that the atmospheric pressure plasma arc (APPA) cleaning is effective in reducing considerably the amount of lubricant. Furthermore, it is feasible to apply LS-SVM in forecasting the cleaning quality and determining processing parameters, and the mean absolute percent error eMAPE between predictive value and experimental value of water contact angle is 6.09%. Otherwise, the eMAPE of working current is 4.46%.

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