Change of Hydrophobicity on Silicone Rubber Modified by CF4 Capacitively Coupled Plasma and Inductively Coupled Plasma

2008 ◽  
Vol 373-374 ◽  
pp. 350-353 ◽  
Author(s):  
S.H. Gao ◽  
Y. Liu ◽  
M.K. Lei ◽  
Li Shi Wen
Keyword(s):  
Contact Angle ◽  
Silicone Rubber ◽  
Inductively Coupled Plasma ◽  
Treatment Time ◽  
Static Contact Angle ◽  
Rf Plasma ◽  
Capacitively Coupled ◽  
Inductively Coupled ◽  
Static Contact ◽  
Capacitively Coupled Plasma

Silicone rubber (SIR) samples are exposed to CF4 capacitively coupled plasma (CCP) and inductively coupled plasma (ICP) at radio frequency (RF) power of 60–200 W for a treatment time up to 20 min, respectively. Static contact angle is employed to estimate the change of hydrophobicity of the silicone rubber modified by the two coupled types of CF4 RF plasma. A milder enlargement of static contact angle of SIR samples modified by ICP treatment is observed compared with that by CCP treatment. The hydrophobicity of the modified SIR surface by CCP treatment increases to a maximum, and further decreases toward the hydropholicity. The higher self-bias on the SIR samples being modified by CCP treatment than that by ICP treatment leads to the more dramatic physical and/or chemical reaction on the SIR surface, resulting in the competition between fluorination and ablation or etching.

Hydrophobic Modification on Surface of Silicone Rubber by Tetrafluoromethane Radio Frequency Inductively Coupled Plasma

2014 ◽  
Vol 1003 ◽  
pp. 69-73
Author(s):  
Song Hua Gao ◽  
Li Hua Gao
Keyword(s):  
Contact Angle ◽  
Radio Frequency ◽  
Silicone Rubber ◽  
Photoelectron Spectroscopy ◽  
Inductively Coupled Plasma ◽  
Hydrophobic Modification ◽  
Hydrophobic Property ◽  
X Ray ◽  
Inductively Coupled ◽  
Static Contact

Hydrophobic modification on surface of silicone rubber by CF4 radio frequency inductively coupled plasma is discussed. Static contact angle and X-ray photoelectron spectroscopy were used in characterizing the hydrophobic property and chemical composition of the modified silicone rubber. The results show that the improvement of surface hydrophobic property on modified silicone rubber is put down to the introduction of fluorocarbon functional groups (C-CFn, n=1, 2,3) and fluosilicic structures (Si-F and Si-F2) during the treatment.

The electronic identity of inductive and capacitive plasmas

2008 ◽  
Vol 74 (2) ◽  
pp. 155-161 ◽  
Author(s):  
K. T. A. L. BURM
Keyword(s):  
Inductively Coupled Plasma ◽  
Optimal Operation ◽  
Identity Relation ◽  
Inductively Coupled Plasmas ◽  
Plasma Sources ◽  
Capacitively Coupled ◽  
Inductively Coupled ◽  
Capacitively Coupled Plasma ◽  
Coupled Plasmas ◽  
Operation Frequency

AbstractAn electronic identity relation, relating capacitively coupled plasma sources to corresponding inductively coupled plasma sources, has been derived, starting from the Maxwell relations for matter and the characteristics of a capacitor and of an inductor. Furthermore, the breakdown conditions for both capacitively coupled plasmas and for inductively coupled plasmas as well as their optimal operation frequency ranges are discussed.

Surface Treatment of Polystyrene Films with Inductively Coupled Plasma System

2008 ◽  
Vol 55-57 ◽  
pp. 753-756 ◽  
Author(s):  
R. Nakhowong ◽  
Toemsak Srikhirin ◽  
Tanakorn Osotchan
Keyword(s):  
Contact Angle ◽  
Plasma Treatment ◽  
Inductively Coupled Plasma ◽  
Gas Flow ◽  
Moisture Absorption ◽  
Treatment Time ◽  
Argon Plasma ◽  
Contact Angles ◽  
Inductively Coupled ◽  
Before And After

The surface of polystyrene (PS) thin films in argon plasma was modified to study the hydrophilicity properties. An inductively coupled plasma (ICP) system was used to generate the argon plasma. In the experiment, the effect of RF power levels, gas flow rate and treatment time was investigated. The surface morphology of PS films was examined by the atomic force microscopy (AFM), also the contact angle goniometry was used for measuring the wettability of PS films before and after plasma treatment. After the plasma treatment, AFM images of PS revealed the increasing of the surface roughness as increasing the power levels and treatment times. Moreover, after treated with argon plasma, the contact angles of polystyrene films also decrease where the power levels and treatment times were increased. It is clear that the effects of power levels and treatment time improve the wettability of PS films. It can also be observed that by placing the sample in air after plasma treatment, the contact angle gradually increases probably due to moisture absorption in the PS films.

Effect of UV Radiation on HTV-Silicon Rubber under Different Humidity

2014 ◽  
Vol 986-987 ◽  
pp. 55-58
Author(s):  
Chun Fang Yi ◽  
Qian Shi ◽  
Pei Song Liang
Keyword(s):  
Contact Angle ◽  
Uv Radiation ◽  
Silicone Rubber ◽  
Hardness Test ◽  
Static Contact Angle ◽  
Rubber Material ◽  
Silicon Rubber ◽  
Static Contact ◽  
Aging Properties ◽  
Ultraviolet Aging

Along with our country " west-east electricity transmission " project and UHV projects,HTV-silicon rubber has been more and more widely used in the western regions of China,such as xining, Lhasa, hami and other regions, has strong solar radiation, long sunshine time, but the region environment humidity conditions are different. Therefore, it is necessary to study the Effect of UV Radiation on HTV-Silicon Rubber under different humidity. In this paper, the extraction of relative humidity variable, under different humidity conditions,HTV silicone rubber material taken for artificial ultraviolet aging experiment, to explore under different humidity conditions,HTV silicone rubber material’s ultraviolet aging properties. Experimental samples of artificial ultraviolet aging experiment taken in static contact angle test, hardness test, fourier transform infrared spectroscopy (FTIR) analysis, then integrate the test data and make theoretical analysis.The experimental results show that both samples hardness are larger, the flexibility are reduced; their both surface static contact angle are decreased, the hydrophobic are part of the loss; their both surface roughness are bigger,and a part of filler is leaked; FTIR of peak area of Si-CH3 and Si-O-Si keys absorption peak are reduced, shows a portion of the Si-CH3 and Si-O-Si keys is interrupted into free radicals; UV radiation has a certain influnce on HTV silicone rubber.Humidity variable has two contray sides influence on ultraviolet aging characteristics of HTV silicone rubber material,its process is complicated.

Sign in / Sign up

Export Citation Format

Share Document