Adhesion Properties of Cellulose Films

1999 ◽  
Vol 586 ◽  
Author(s):  
Xiujuan Zhang ◽  
Raymond. A. Young
Keyword(s):  
Surface Roughness ◽  
Plasma Treatment ◽  
Functional Groups ◽  
Adhesion Force ◽  
Oxygen Plasma Treatment ◽  
Base Interaction ◽  
Adhesion Properties ◽  
Oh Groups ◽  
Cellulose Films ◽  
Afm Tips

ABSTRACTThe adhesion properties were evaluated for untreated and modified cellulose (cellophane) films. Several functional groups were introduced on the film surfaces by plasma based treatments. All the films were characterized by atomic force microscopy (AFM) and scanning electron microscopy (SEM). AFM was employed to study the adhesion properties using both standard silicon nitride tips as well as self-assembled monolayer (SAM) modified gold coated tips containing a variety of specific functional groups. The acetone extracted cellulose films, which are rich in –OH groups, were used as substrates. The adhesion force detected with –COOH terminated AFM tips (∼ 34.8 nN) was much larger than that with –CH3 terminated AFM tips (∼16.7 nN), which was attributed to the hydrogen bonding between –COOH and –OH functional groups. The adhesion force of –NH2 terminated AFM tips on the acetone extracted cellulose film was higher at 42.92 nN. However, after surface modification of the cellulose films with argon and oxygen based plasma treatments, the adhesion force were decreased to 17.4 and 19.4 nN respectively as a result of greatly enhanced surface roughness. Hydrazine plasma treatment also was used to introduce –NH2 groups on the film surfaces, and the strongest adhesion behavior was observed with AFM tips terminated with -COOH groups on the aminated film due to acid-base interaction. The argon and oxygen plasma treatment greatly increased the surface roughness, resulting in poor adhesion properties. Both surface roughness and chemical modification of the cellophane films affected the adhesion properties as measured by AFM force curves.

Surface Modification of a-C:H(N) Thin Films by Plasma Treatment

2005 ◽  
Vol 11 (S03) ◽  
pp. 162-165 ◽  
Author(s):  
L. von Mühlen ◽  
R. A. Simao ◽  
C. A. Achete
Keyword(s):  
Thin Films ◽  
Surface Roughness ◽  
Optical Properties ◽  
Surface Modification ◽  
Surface Chemistry ◽  
Plasma Treatment ◽  
Surface Properties ◽  
Functional Groups ◽  
Material Properties ◽  
Modify Surface

Surface chemistry and topography of materials are generally preponderant factors in a series of material properties, such as adhesion, wettability, friction and optical properties [1]. Wettability of films, for example, can be altered significantly by modifying its surface roughness and also by incorporating functional groups. Plasma treatment is a powerful and versatile way to modify surface properties of amorphous nitrogen-incorporated carbon thin films (a-C:H(N)) and obtain materials with improved properties, once it is possible to modify the surfaces in a controlled way by specific settings of plasma conditions. [2 - 4]

Gate Dielectric Dependent on Pentacene Growth and Electrical Stability in OTFTs

2006 ◽  
Vol 965 ◽  
Author(s):  
Kim Chang Su ◽  
Jo Sung Jin ◽  
Lee Sung Won ◽  
Baik Hong Koo
Keyword(s):  
Surface Roughness ◽  
Surface Energy ◽  
Functional Groups ◽  
Surface State ◽  
Spin Coating ◽  
Gate Dielectric ◽  
Gate Dielectrics ◽  
Dielectric Surface ◽  
Electrical Stability ◽  
Oh Groups

ABSTRACTWe report on the effects of modifying the gate dielectrics by spin coating of HMDS, PVP and PVA which cause different surface energy and surface roughness owing to the different functional groups. In changing the surface state with applying various surface treatments, I-V and C-V measurements of the OTFTs were performed. The PVP-coated OTFTs, which has smoother and lesser amount of OH-groups on the gate dielectric surface, showed enhanced pentacene growth and nearly free hysteresis behavior than that of the HMDS and PVA-coated OTFTs.

IMPACT OF PLASMA SURFACE TREATMENT ON BAMBOO CHARCOAL/SILVER NANOCOMPOSITE

2016 ◽  
Vol 23 (01) ◽  
pp. 1550089 ◽  
Author(s):  
K. VIGNESH ◽  
K. A. VIJAYALAKSHMI ◽  
N. KARTHIKEYAN
Keyword(s):  
Antibacterial Activity ◽  
Plasma Treatment ◽  
Surface Area ◽  
Functional Groups ◽  
Oxygen Plasma ◽  
Bet Surface Area ◽  
Oxygen Plasma Treatment ◽  
Bamboo Charcoal ◽  
Area Formula ◽  
Vis Spectroscopy

Bamboo charcoal (BC) accompanied silver (Ag) nanocomposite is synthesized through sol–gel method. The produced BC/Ag nanocomposite was surface modified by air and oxygen plasma treatments. Silver ions (Ag[Formula: see text]) will serve to improve the antibacterial activity as well as the surface area of BC. Plasma treatment has improved the surface functional groups, crystalline intensity and antibacterial activity of the prepared nanocomposite. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) studies show that Ag nanoparticles have good agreement with BC and the particle size has a mean diameter of 20–40[Formula: see text]nm. We observe the carboxyl functional groups in Fourier transform infrared spectroscopy (FTIR) after the oxygen plasma treatment. Moreover surface area and adsorption were analyzed by using the Brunauer, Emmett and Teller (BET) surface area ([Formula: see text]) and UV–Vis spectroscopy.

Increased surface roughness by oxygen plasma treatment of graphite/polymer composite

2003 ◽  
Vol 210 (3-4) ◽  
pp. 255-261 ◽  
Author(s):  
U. Cvelbar ◽  
S. Pejovnik ◽  
M. Mozetiè ◽  
A. Zalar
Keyword(s):  
Surface Roughness ◽  
Plasma Treatment ◽  
Polymer Composite ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment

Influence of Oxygen Plasma Treatment on Surface Properties of Armos Fiber

2008 ◽  
Vol 373-374 ◽  
pp. 430-433 ◽  
Author(s):  
Ping Chen ◽  
Jing Wang ◽  
Cheng Shuang Zhang ◽  
Chun Lu ◽  
Zhen Feng Ding ◽  
...  
Keyword(s):  
Surface Energy ◽  
Plasma Treatment ◽  
Functional Groups ◽  
Interfacial Adhesion ◽  
Oxygen Plasma ◽  
Treatment Time ◽  
Fiber Surface ◽  
Aramid Fiber ◽  
Oxygen Plasma Treatment ◽  
Polar Functional Groups

Armos fiber (F-12 aramid fiber in paper) was provided with broad application foreground as reinforcement material for advanced composites in aviation and spaceflight field, due to its outstanding properties, such as high modulus, high strength, high temperature resistance, erosion resistance and so on. However, the exertion of property was still limited by slippery surface, low surface energy and weak interfacial adhesion performance. In this study, the effects of oxygen plasma treatment time on polar functional groups introduced onto the fiber surface, surface free energy and surface topographic images were discussed by X-ray photoelectron spectroscopy (XPS) analysis, dynamic contact angle analysis system (DCA) and atomic force microscopy (AFM), respectively. It was found that the content of oxygen element and polar functional groups on fiber surface were all increased obviously after oxygen plasma treatment. The content of oxygen element on surface for untreated F-12 aramid fiber was 11.13%, while it increased to 15.20% after oxygen plasma treatment for 10 min; The content of polar functional groups on surface for untreated F-12 aramid fiber was 28.14%, while it increased to 38.11% after oxygen plasma treatment for 10 min. The polar component (γp) of fiber surface energy increased sharply from 6.82 mN/m to 36.68 mN/m after 10 min plasma treatment, the total surface free energy was increased from 46.26 mN/m to 64.66 mN/m.The results indicated that oxygen plasma treatment had introduced a large amount of reactive functional groups onto the fiber surface, and these groups can form together as covalent bonding to improve the surface wettability and increase the surface energy of fibers. At the same time, oxygen plasma treatment was able to generate a mass of bulges and grooves on F-12 aramid fiber surface, which had an active effect on increasing the chemical bond and mechanical function between fiber and resin and enhancing the interfacial adhesion performance of composite. The fiber surface grooves had been increased with the time prolonging before 10 min while decreased after 10 min, the results maybe relate to partial organic on fiber surface melting. It had an adverse effect on the interfacial adhesion properties of composite. Therefore, the optimum plasma treatment time was between 5 min and 10 min.

X-ray photo-electron spectroscopic studies of cryogenic and plasma surface-treated z-pins

2017 ◽  
Vol 51 (8) ◽  
pp. 1155-1166 ◽  
Author(s):  
André Knopp ◽  
Gerhard Scharr
Keyword(s):  
Surface Roughness ◽  
Plasma Treatment ◽  
Functional Groups ◽  
Bulk Material ◽  
Cryogenic Treatment ◽  
Covalent Bonds ◽  
Plasma Surface ◽  
X Ray ◽  
Load Transmission ◽  
The Impact

The mechanical properties of composite materials are primarily dependent on the load transmission between their components. Especially, the fracture performance of a fibre-reinforced polymer made of a preimpregnated fibres (prepreg) with a three-dimensional z-pin reinforcement can be influenced by the interface characteristics between pins and laminate. X-ray photo-electron spectroscopic (XPS) analysis and scanning electron microscopic (SEM) studies of untreated, cryogenic and plasma surface-treated z-pins were carried out to determine the effect of surface treatments on chemical composition, formation of functional groups and topography of pin surface. Pullout tests were conducted to investigate the impact of a surface treatment on the bridging forces, which have significant influence on delamination toughness of a z-pinned laminate. It was pointed out that a cryogenic treatment cannot lead to an increase of oxygen or nitrogen functional groups at the z-pin surface. Nevertheless, the pullout forces can be increased which are caused by an increased surface roughness. However, with a plasma treatment, an oxygen and nitrogen functionalization can be reached. An increase of the O/C ratio with all plasma treatments can be determined. Summarizing the results, it can be shown that oxygen functional groups can be generated by a plasma treatment. These groups are able to establish covalent bonds between z-pin surface and bulk material, which can lead to a better load transmission between the pins and laminate and thus to higher fracture properties. The increased pullout forces result from a combination of improved adhesion between pins and laminate and increased interlocking effects, due to the higher surface roughness after plasma treatment.

Long-life Zinc Electrode Achieved by Oxygen Plasma Functionalization

2022 ◽  
Author(s):  
Minghui Qiu ◽  
Hongqi Liu ◽  
Jinbin Luo ◽  
Benjamin Tawiah ◽  
Shaohai Fu ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Functional Groups ◽  
Treatment Strategy ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment ◽  
Zinc Electrode ◽  
Surface Oxygen ◽  
Oxygen Functional Groups ◽  
Long Life ◽  
Plasma Functionalization

A facile oxygen plasma treatment strategy is proposed to promote zinc dendrite inhibition by modifying the surface oxygen functional groups. The plasma-treated zinc electrode achieved an elongated working lifespan of...

Effect of Oxygen Plasma Treatment for Cell Adhesion Properties on Silicone Surface

2005 ◽  
Vol 13 (1) ◽  
pp. A8-A8
Author(s):  
Ikuko Ohsugi ◽  
Tai Yamada ◽  
Yoshikazu Inoue ◽  
Kiyoyuki Mizuno ◽  
Takayuki Okumoto ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment ◽  
Adhesion Properties ◽  
Silicone Surface ◽  
Effect Of Oxygen

Surface modification of polyimide fibers by oxygen plasma treatment and interfacial adhesion behavior of a polyimide fiber/epoxy composite

2017 ◽  
Vol 24 (4) ◽  
pp. 477-484 ◽  
Author(s):  
Xuyang Sun ◽  
Junfeng Bu ◽  
Weiwei Liu ◽  
Hongqing Niu ◽  
Shengli Qi ◽  
...  
Keyword(s):  
Free Energy ◽  
Plasma Treatment ◽  
Surface Free Energy ◽  
Photoelectron Spectroscopy ◽  
Interfacial Adhesion ◽  
Oxygen Plasma ◽  
Dynamic Contact Angle ◽  
Epoxy Composites ◽  
Oxygen Plasma Treatment ◽  
Adhesion Properties

AbstractOxygen plasma was used to enhance the surface behavior of polyimide (PI) fibers and PI fiber-reinforced epoxy composites were prepared in our present work. The effects of plasma treating times on the surface properties of PI fiber and the interfacial adhesion of PI fiber/epoxy composites were investigated. Surface chemical composition, surface morphologies and surface free energy of the fibers were characterized by X-ray photoelectron spectroscopy, scanning electron microscopy and dynamic contact angle analysis, respectively. The results suggest that some oxygen functional groups were introduced onto PI fiber surfaces, and the surface roughness of fibers was enhanced. Resultantly, the surface free energy of fibers and the interfacial adhesion of composites were improved by the oxygen plasma treatment. The interlaminar shear strength of the composites increased to 70 MPa when the fibers were treated for 10 min, which proved good interfacial adhesion properties.

scholarly journals Surface Roughness Analysis of Cotton Fabric by Laser Speckle Technique

2021 ◽  
pp. 1-9
Author(s):  
Anupriyanka T ◽  
Shanmugavelayutham G ◽  
Prakasam R ◽  
Balamurugan R
Keyword(s):  
Surface Roughness ◽  
Plasma Treatment ◽  
Cotton Fabric ◽  
Textile Industry ◽  
Laser Speckle ◽  
Oxygen Plasma Treatment ◽  
Temperature Plasma ◽  
Waste Products ◽  
Roughness Analysis ◽  
Living Organisms

In the textile industry, disposing the waste products after dyeing causes a major environmental issue. The mordants used leads to adverse effect for the human and other living organisms. Plasma processing is ecofriendly and it does not produce any waste, pollution free on the environment. Therefore, low temperature plasma treatments are set to make a revolution in textile industry. The present work is to modify the surface of cotton fabric by oxygen plasma treatment with operating parameters such as exposure time, discharge potential and base pressure are kept constant as 5 min, 400V and 9 Pascal respectively. The surface roughness of the fabric is analyzed by laser speckle technique for plasma treated and mordanted fabric and then corresponding results were reported. Further, we observed the increase in surface roughness of the fabric after plasma treatment.

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