SHOCK-INDUCED PHYSICAL AND CHEMICAL SURFACE CHANGES ON OXIDE POWDERS

1958 ◽  
Vol 36 (5) ◽  
pp. 625-627 ◽  
Author(s):  
R. W. Nicholls ◽  
W. H. Parkinson
Keyword(s):  
Chemical Surface ◽  
Oxide Powders ◽  
Physical And Chemical ◽  
Surface Changes

scholarly journals Studies Regarding the Increase in Hydrophilicity of Some Textile Fabrics through Treatment by Cold Plasma and Grafting with Vinyl Monomers

2017 ◽  
Vol 7 (2) ◽  
pp. 123 ◽  
Author(s):  
Marcel Popa ◽  
Ana Irina Ecsner ◽  
Rodica Muresan ◽  
Emil Muresan ◽  
Emil Ghiocel Ioanid ◽  
...  
Keyword(s):  
Soil Removal ◽  
Water Drop ◽  
Glow Discharge Plasma ◽  
Vinyl Monomers ◽  
Chemical Surface ◽  
Textile Fabrics ◽  
Colour Measurements ◽  
Soil Release ◽  
Physical And Chemical ◽  
Surface Changes

The polyamide and polyester fabrics have been treated by glow discharge plasma and grafted with 2-hydroxyethylmethacrylate (HEMA) in order to increase the hydrophilicity and to improve the soil release properties. The plasma treatments were carried out at different exposure times. Grafting was obtained with gaseous HEMA and with alcohol or aqueous solution of HEMA at different concentrations. The physical and chemical surface changes were studied using scanning electron microscopy, infrared spectroscopy, colour measurements. The hydrophilicity was assessed through the absorption time of a water drop and the soil removal through washing by remission values.

scholarly journals Use of modern methods of fibre surface modification to obtain the multifunctional properties of textile materials

2003 ◽  
Vol 57 (10) ◽  
pp. 491-499 ◽  
Author(s):  
Dragan Jocic ◽  
Petar Jovancic ◽  
Maja Radetic ◽  
Tatjana Topalovic ◽  
Zoran Petrovic
Keyword(s):  
Surface Modification ◽  
Surface Topography ◽  
Fibre Surface ◽  
Enzyme Treatment ◽  
Textile Fibre ◽  
Textile Materials ◽  
Chemical Surface ◽  
Angle Measurements ◽  
Physico Chemical ◽  
Physical And Chemical

The modern textile fibre treatments aim to obtain the required level of beneficial effect while attempting to confine the modification to the fibre surface. Recently, much attention has been focused on different physical methods of fibre surface modification, cold plasma treatment being considered as very useful. Moreover, there are efficient chemical methods available, such as peroxide, biopolymer and enzyme treatment. Some interesting combinations of these physical and chemical surface modification methods as means to modify fibre surface topography and thus controlling the surface-related properties of the fibre are presented in this paper. The properties obtained are discussed on the basis of the physico-chemical changes in the surface layer of the fibre, being assessed by wettability and contact angle measurements, as well as by FTIR-ATR and XPS analysis. The SEM and AFM technique are used to assess the changes in the fibre surface topography and to correlate these changes to the effectiveness, uniformity and severity of the textile fibre surface modification treatments.

scholarly journals Physical and Chemical Modifications of Plant Fibres for Reinforcement in Cementitious Composites

2019 ◽  
Vol 2019 ◽  
pp. 1-18 ◽  
Author(s):  
R. Ahmad ◽  
R. Hamid ◽  
S. A. Osman
Keyword(s):  
Mechanical Properties ◽  
Interfacial Adhesion ◽  
Moisture Absorption ◽  
Surface Modifications ◽  
Future Research ◽  
Cementitious Composites ◽  
Chemical Surface ◽  
Plant Fibre ◽  
Physical And Chemical ◽  
Fibre Matrix

This paper highlights the physical and chemical surface modifications of plant fibre (PF) for attaining suitable properties as reinforcements in cementitious composites. Untreated PF faces insufficient adhesion between the fibres and matrix due to high levels of moisture absorption and poor wettability. These conditions accelerate degradation of the fibre in the composite. It is also essential to reduce the risk of hydrophilic PF conditions with surface modification, to enhance the mechanical properties of the fibres. Fibres that undergo chemical and physical modifications had been proven to exhibit improved fibre-matrix interfacial adhesion in the composite and contribute to better composite mechanical properties. This paper also gives some recommendations for future research on chemical and physical modifications of PF.

Exploring the science of thinking independently together: Faraday Discussion Volume 204 – Complex Molecular Surfaces and Interfaces, Sheffield, UK, July 2017

2017 ◽  
Vol 53 (94) ◽  
pp. 12601-12607
Author(s):  
M. Samperi ◽  
B. E. Hirsch ◽  
Y. A. Diaz Fernandez
Keyword(s):  
Surface Analysis ◽  
Research Topics ◽  
Molecular Surfaces ◽  
Chemical Surface ◽  
Surfaces And Interfaces ◽  
Fundamental Research ◽  
Physical And Chemical

This Faraday Discussion meeting brought together theoreticians and experimentalists from both physical and chemical backgrounds to discuss the relevant applied and fundamental research topics within the broader field of chemical surface analysis and characterization.

scholarly journals Surface modification of ASP 30 steel induced by femtosecond laser with 1014 and 1013 W/cm2 intensity in vacuum

2017 ◽  
Vol 35 (3) ◽  
pp. 534-542 ◽  
Author(s):  
M. Trtica ◽  
J. Limpouch ◽  
P. Gavrilov ◽  
P. Hribek ◽  
J. Stasic ◽  
...  
Keyword(s):  
Surface Modification ◽  
Femtosecond Laser ◽  
Steel Surface ◽  
Laser Intensity ◽  
Periodic Surface ◽  
Laser Surface Modification ◽  
Chemical Surface ◽  
Steel Target ◽  
Pulse Count ◽  
Surface Changes

AbstractA study of ASP 30 steel surface modification with high intensity Ti:sapphire laser, operating at 804 nm wavelength and pulse duration of 60 fs, in vacuum ambient, is presented. ASP 30 steel surface variations were studied at laser intensities of 1014 and 1013 W/cm2. The steel target specific surface changes and phenomena observed are: (i) Creation of craters at 1014 W/cm2 intensity; (ii) formation of periodic surface structures only at the reduced intensity of 1013 W/cm2; (iii) chemical surface changes registered only at higher laser intensity, and (iv) occurrence of plasma in front of the surface, including its emission in X-ray region. It can be concluded from this study that the reported laser intensities can effectively be applied for ASP 30 steel surface modification. Careful choosing of laser intensity and pulse count can lead to precise superficial material removal, for example laser intensity ~1013 W/cm2 and low pulse count can lead to ultra-precise surface processing. Generally, femtosecond laser surface modification of ASP 30 steel is non-contact and very rapid compared with traditional modification methods.

Improvement of bacterial tethering using both physical and chemical surface modification for flagella spin actuators

2007 ◽  
Vol 123 (1) ◽  
pp. 269-276 ◽  
Author(s):  
HyunMin Choi ◽  
Kyo-in Koo ◽  
Sunkil Park ◽  
Myoung-Jun Jeong ◽  
GilSub Kim ◽  
...  
Keyword(s):  
Surface Modification ◽  
Chemical Surface ◽  
Chemical Surface Modification ◽  
Physical And Chemical
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