Plasma treatments fabrics

Lifetime depth profiles will be useful for the detection of inhomogeneous pore size distributions and in tracking impurities. For microelectronic device fabrication it is crucial that subsequent processing steps do not alter the deposited porous layers. The case presented above of oxygen plasma treatment is just one example. A lifetime depth profile could provide direct evidence for the changes in pore sizes discussed in the work on HSSQ samples and oxygen plasma treatment [22]. Gidley et al have carried out similar depth profiles [74]. 

Air plasma treatment was used to make one surface hydrophilic, and CF4 plasma treatment was used to make the other hydrophobic. Such a fabric with a different set of surface characteristics on each side can be made however, the success of this undertaking is contingent on which treatment is applied first. The sequence dependency of plasma treatments may be explained by the concept of plasma sensitivity of the elements involved in the two steps. Results are summarized in Tables 10.1 and 10.2. 

Fabrics are porous. Consequently, the plasma treatment applied to one side of a fabric penetrates to the other side, even though the second side is not exposed to the plasma directly. This penetration effect of plasma treatment was previously known [10]. 

Plasma treatment penetrates through a porous structure, i.e., it is not limited to the exposed surface. Contact angle cannot be measured because a water droplet penetrates quickly into the fabric. Contact angle can be measured but a water droplet penetrates slowly into the fabric. 

The field of industrial plasma engineering has grown in recent years. The uses are motivated by plasma s ability to accomplish industrially relevent results more efficiently and cheaply than competing processes. The research program concerning plasma treatment of textile materials was launched at the Polish Textile Institute in 1973 to improve the soil release properties of double jersey fabrics from textunsed polyester yams. The first experiments with wool date back to 1980 to replace the chlorination in fabric preparation for printing. Tliree machines for continuous plasma treatment of wool top have been developed as follows ... 

Surface Modification of Fabrics Under Plasma Treatment... 

Plasma treated wool may exhibit more or less firm or harsh handle because of surface roughening. This property is very important for hand-knitting yams or yams for underwear fabrics. Softeners generally deteriorate the shrink resistance imparted by plasma treatment or plasma plus polymer after-treatment quite heavily [36]. The enzyme treatment is capable of improving the handle of plasma treated wool as well as plasma treated and polymer after-treated hand-knitting yams without imparting their shrink resistance [62]. 

Plasma may be used for removing the contaminants, finishing and sizing agents from the fabric. Desizing of polyester fabric that used polyvinyl alcohol as the sizing agent can be removed by plasma treatment [63]. 

The hydrophobic effect on a woven cotton fabric can be obtained by surface treatment. Plasma treatment with acid as a component of original gas will result in a hydrophilic surface [66]. 

In this chapter, various aspects of the growth of GaN films on porous SiC (PSC) by hydride vapor phase epitaxy (HVPE) are discussed (here, we understand that a porous SiC substrate is a SiC wafer with a several micrometer-thick porous layer in it). First, the preparation of PSC substrates under various conditions, and the properties of the PSC fabricated are described. Next, mechanisms of formation of different types of PSC structure and the stability of porous substrates under thermal and plasma treatment are considered. The final part of the chapter treats GaN epitaxial growth, film properties, and explanations for improved epitaxy provided by porous substrates. 

Maximov, A.I., Gorberg, B.L., Titov, V.A. (1997), Possibilities and Problems of Plasma Treatment of Fabrics and Polymer Materials, in Textile Chemistry - Theory, Technology, Equipment, Moryganov, A.P. (ed.), NOVA Science Publishers, New York. 

Yasuda et al. [198-200] studied the effect of plasma treatment on different fibers and fabrics. They used four nonpolymerizing gases helium, air, nitrogen, and tetra-fluoromethane. It was found that in some cases the etching of the fiber was accompanied by the implantation of the specific atoms into its surface. The model studies performed with nylon 6 have shown that plasma treatment, similar to plasma polymerization, may be carried out in the power-deficient range as well as in the gas-deficient range. 

A decrease in the vs ttability of many hydrophilic fabrics has also been observed by using tetrafluoromethane plasma treatment Okazaki et al. [201] have reported that any desired surface wettability of a plastic surface can be realized by changing... 

Zemljic, L. E, Persin, Z., and Stenius, P. (2009). Improvement of chitosan adsorption onto cellulosic fabric by plasma treatment, Biomacrnrnnleajlps. 10,1181-1187. 

For low temperature plasma treatment, the aramid fabric samples were treated for predetermined times using a bell jar type RF ion-plating apparatus, as shown in Figure 2, at a ftequency of 13,56 MHz (inside diameter 500mm, height=600mm, manufactured by Sanritsu Seisakusho Co.) at a discharge output... 

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