Volume 7, Issue 4 (2023)
IQBQ 2023, 7(4): 15-32 |
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Ghahremannezhad F, Mohammadhosseini B, Khani M R, Khanjani J. Direct modification of polyethylene surfaces using non-equilibrium gliding arc plasma with air at atmospheric pressure. IQBQ 2023; 7 (4) :15-32
URL: http://arcpe.modares.ac.ir/article-38-75434-en.html
URL: http://arcpe.modares.ac.ir/article-38-75434-en.html
1- Department of Physics, Faculty of Science, Imam Khomeini International University (RA)
2- Department of Physics, Faculty of Science, Imam Khomeini International University (RA) ,b_m_hosseini@sci.ikiu.ac.ir
3- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran
4- Department of Materials, Chemistry and Polymer, Bouin Zahra Engineering Technical Center
2- Department of Physics, Faculty of Science, Imam Khomeini International University (RA) ,
3- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran
4- Department of Materials, Chemistry and Polymer, Bouin Zahra Engineering Technical Center
Abstract: (228 Views)
Research subjec: Polyethylene surfaces are often modified because of different reasons such as cleaning, etching, change in the performance of the surface, and surficial precipitation. One of the surfaces in the blow molded applications that must be treated in order to be ready for the adhesion of the labels is the surface of the bottle of the hygiene detergents, being the purpose of this research. In this paper, gliding arc plasma device is used at atmospheric pressure with air gas to modify the surface of polyethylene sheets in order to change their structure.
Methods: Various analyzes such as AFM, SEM and XPS tests have been used to investigate the changes in the chemistry and physics of polyethylene surface after plasma modification. Optical emission spectroscopy (OES) has also been used to identify plasma elements.
Findings: The contact angle between the water droplet and the polyethylene surface reached 46.96 ° after 40 s of treatment, while this contact angle was 66.53 ° before plasma treatment. The decrease in the contact angle size of the water droplet and the sample surface indicates the hydrophilicity of the polyethylene surface after plasma modification. The surface free energy of polyethylene was calculated before and after plasma modification using the Owens-Wendt-Rabel Kaelble method. The surface energy of polyethylene has increased from 42.20 mj.m-2 in the control sample to 60.32 mj.m-2 in the modified sample. The increase in surface roughness of the modified sample with gliding arc plasma was confirmed by AFM test. The surface roughness of polyethylene in the control sample was 47.18 nm, while the roughness in the modified sample increased to 59.86 nm. The XPS test confirmed the presence of oxygenated and nitrogenous functional groups on the surface of the modified sample. This test also showed the formation of C−C=O and C−O−C bonds on PE surface.
Methods: Various analyzes such as AFM, SEM and XPS tests have been used to investigate the changes in the chemistry and physics of polyethylene surface after plasma modification. Optical emission spectroscopy (OES) has also been used to identify plasma elements.
Findings: The contact angle between the water droplet and the polyethylene surface reached 46.96 ° after 40 s of treatment, while this contact angle was 66.53 ° before plasma treatment. The decrease in the contact angle size of the water droplet and the sample surface indicates the hydrophilicity of the polyethylene surface after plasma modification. The surface free energy of polyethylene was calculated before and after plasma modification using the Owens-Wendt-Rabel Kaelble method. The surface energy of polyethylene has increased from 42.20 mj.m-2 in the control sample to 60.32 mj.m-2 in the modified sample. The increase in surface roughness of the modified sample with gliding arc plasma was confirmed by AFM test. The surface roughness of polyethylene in the control sample was 47.18 nm, while the roughness in the modified sample increased to 59.86 nm. The XPS test confirmed the presence of oxygenated and nitrogenous functional groups on the surface of the modified sample. This test also showed the formation of C−C=O and C−O−C bonds on PE surface.
Article Type: Original Research |
Subject:
Processing
Received: 2024/06/3 | Accepted: 2024/11/5 | Published: 2023/12/22
Received: 2024/06/3 | Accepted: 2024/11/5 | Published: 2023/12/22
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