Structural Analysis of the Composite Film of Phthalocyanine, Stearic Acid and Copper Prepared by Vacuum Deposition.

This paper reports measurements of the shear strength of dry and lubricated Au/Au, Al/Au and glass/Au couples from measurements of the frictional force during sliding of a hemispherical pin in contact with a flat side. The Au and Al surfaces are generated by vacuum deposition of thin metal films on glass. Shear strength is measured at a sliding speed of 60 μm s−1 and at contact stresses ranging from ~ 0.05 to 0.8 GPa. Lubrication is achieved by depositing a stearic acid on the slide. The shear strength of dry glass/Au sliding interfaces is found to increase linearly with contact stress but decreases slightly with increasing thickness of the gold film. The shear strength of dry Au/Au interfaces is larger than that of dry glass/Au. Stearic acid does not protect gold from mechanical wear during sliding because the acid is expelled from the gold/gold interface, even at the lowest compressive stresses used. These observations are interpreted in terms of the weak adhesion of stearic acid to gold. In contrast, stearic acid sustains mechanical shear in interfaces consisting of gold sliding on either bare glass or aluminum, to which the acid adheres. These observations suggest that a boundary lubricant film protects against mechanical wear if it adheres only to one of the contacting surfaces.

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Stearic acid-coated superhydrophobic Fe2O3/Fe3O4 composite film on N80 steel for corrosion protection

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2018.12.040 ◽

2019 ◽

Vol 359 ◽

pp. 47-54 ◽

Cited By ~ 9

Author(s):

Jun Hu ◽

Shijun He ◽

Zhen Wang ◽

Jianbo Zhu ◽

Liping Wei ◽

...

Keyword(s):

Stearic Acid ◽

Composite Film ◽

Corrosion Protection ◽

N80 Steel

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Investigation of stearic acid and manganese stearate films obtained by Langmuir-Blodgett and vacuum deposition methods

Thin Solid Films ◽

10.1016/0040-6090(94)06253-h ◽

1995 ◽

Vol 254 (1-2) ◽

pp. 229-239 ◽

Cited By ~ 16

Author(s):

J. Baran ◽

M.K. Marchewka ◽

H. Ratajczak ◽

A.Yu. Borovikov ◽

V.N. Byckov ◽

...

Keyword(s):

Stearic Acid ◽

Vacuum Deposition ◽

Langmuir Blodgett

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The wettability of solid surfaces modified by vacuum deposition of stearic acid

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/s0927-7757(98)00817-6 ◽

1999 ◽

Vol 155 (2-3) ◽

pp. 221-229 ◽

Cited By ~ 3

Author(s):

Yuh-Lang Lee

Keyword(s):

Stearic Acid ◽

Solid Surfaces ◽

Vacuum Deposition

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Modification of Titanium Dioxide Embedded in the Bio-Composite Film for Photocatalytic Oxidation of Chlorinated Volatile Organic Compound

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.894.37 ◽

2014 ◽

Vol 894 ◽

pp. 37-42 ◽

Cited By ~ 1

Author(s):

Chaisri Tharasawatpipat ◽

Jittiporn Kruenate ◽

Kowit Suwannahong ◽

Torpong Kreetachat

Keyword(s):

Titanium Dioxide ◽

Stearic Acid ◽

Composite Film ◽

Photocatalytic Degradation ◽

Photocatalytic Oxidation ◽

Composite Films ◽

Chlorinated Volatile Organic Compounds ◽

Blown Film ◽

Uniform Dispersion ◽

Volatile Organic

This research aimed to apply the Blown Film Extrusion technique to synthesize the titanium dioxide (TiO2) bio-composite films incorporated on a thin film as a photocatalyst. The biopolymer materials have great recognition via their renewable and biodegradable characteristic and the green composite has been a new challenge path to replace traditional polymer composite. In this work, TiO2/Polybutylene succinate (PBS) bio-composite film was developed to be used as a supporter for determining the photocatalytic oxidation activity of the TiO2 on the chlorinated volatile organic compounds degradation. PBS is a synthetic biopolymer which has a reasonable mechanical strength. The modified-TiO2/PBS bio-composite films were studied to evaluate the degradation of dichloromethane. In order to improve the distribution of the developed photocatalyst, the TiO2 powders were modified by 0.05% mole of ethyl triethoxysilane (ETES) and stearic acid (SA), respectively. The 10% wt. TiO2/PBS bio-composite films with thickness of 30 μm were prepared by blown film technique. To evaluate the dispersion efficacy, the modified-TiO2/PBS bio-composite films were characterized by Scanning Electron microscopy (SEM). Photocatalytic degradation of dichloromethane in gas phase was determined using an annular closed system photoreactor. The obtained result which was corresponding to the absorption of TiO2/PBS bio composites film was investigated in a range of 300-400 nm via UV/VIS spectrophotometry. The energy band gap of TiO2, ethyl triethoxysilane-TiO2 and stearic acid-TiO2 bio-composite film was found to be 3.18, 3.21, and 3.26 eV, respectively. The SEM shows that the modified-TiO2 with both ETES and SA exhibit uniform dispersion, while the only TiO2 shows an evidence of agglomeration in the PBS matrix. For photocatalyst efficiency, the photocatalytic activity of modified-TiO2/PBS bio-composite film increased comparing to the TiO2/PBS bio-composite film. Moreover, the photocatalytic degradation of dichloromethane by ETES-TiO2/PBS bio-composite film yielded degradation efficiency of 47.0%, whereas SA-TiO2/PBS bio-composite film yielded the removal efficiency of 41.0% for detention time at 350 min.

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