Cellulose plasma treatment

As an example we present here some computation results for the plasma treatment of the hospital patients room waste with advantage of plastics, cellulose and non-organic metal and glass parts. To check the efficiency of gas fuel generation from this waste we have simulated the limited oxidation within temperature range 1000 - 2500 °C. We have assumed that in 1kg of dry waste are (by weight) 60% of plastics, 15% of silicon glass, and 10% of... 

The CF4 plasma treatment yields F/C peak area ratio of approximately 1.5 for both cellulose and cellulose acetate films. When those surface-tagged films were immersed in liquid water, the fluorine atoms, which are detectable by XPS, decreases as a function of the immersion time. Figure 25.9 depicts change of F Is/C Is ratio as a function of immersion time in water, which shows that the disappearance rate of F Is peak is much higher for the semicrystalline cellulose film than that for the amorphous cellulose acetate film. These data actually compare the extent of X interaction rather than the degree of crystallinity, indicating that x interaction overwhelms the degree of crystallinity. 

The modification of cotton cellulose by treatment with low-temperature, low-pressure ammonia plasma created by passing ammonia gas through a radiofrequency (rf) electric field of 13.56 MHz has been reported (1). Earlier reports (2,3,4) were on the effects of rf plasma of argon, nitrogen or air on a group of polysaccharides that included cotton and purified cellulose. 

Figure 9-37. Permeability of the polymer membrane from acetate cellulose with respect to He, H2, CO2, and CH4 as function of microwave plasma treatment time o, Hhc , Hh a, ricoz +, ncH< microwave pulse power 2 kW pulsing period 2 ms pulse duration 100 /ts gas pressure in the microwave discharge chamber 2 Torr nitrogen/oxygen ratio in the plasma gas N2 02 =4 1 flow rate of the plasma gas 40 cm /s.

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

In the woik of Olde Riekerink et al. (2002), one type of UF (cellulose triacetate, CTA) membrane and one type of RO (cellulose acetate blend, CAB) membrane were selected for CO2 plasma modification. CTA ultrafilters are well known for their low fouling properties and CAB membranes are widely used for desalination. CO2 plasma treatment resulted in the gradual etching of the membrane s dense top layer. 

Kusumocahyo, S.P., Kanamori, T., Iwatsubo, T., Sumaru, K. and Shinbo, T. 2002. Development of polyion complex membranes based on cellulose acetate modified by oxygen plasma treatment for pervaporation. 

Yoon, Y.I., Moon, H.S., Lyoo, W.S., Lee, T.S. and Park, W.H. 2009. Superhydrophobicity of cellulose triacetate fibrous mats produced by electrospinning and plasma treatment Carhohvdr. Polvm. 75 246-250. 

Thomas S (2002) Cellulose fiber reinforced composites new challenges and opportunities. 4th International Wood and Natural Fibre Composites Symposium, Kassel Germany, April 10-11 Tu X, Young RA, Denes F (1994) Improvement of bonding between cellulose and polypropylene by plasma treatment. Cellulose 1 87-106 Urbanczyk G (1985) Nauka o Wloknie. WNT, Warszawa... 

Tu X, Young RA, Denes F (1994) Improvement of bonding between cellulose and polypropylene by plasma treatment. Cellulose 1(1) 87-106... 

Tsai PP, Wadsworth LC, Roth JR (1997) Surface modification of fabrics using a one-atmosphere glow discharge plasma to improve fabric wettability. Text Res J 67(5) 359-369 Noeske M et al (2004) Plasma jet treatment of five polymers at atmospheric pressure surface modifications and the relevance for adhesion. Int J Adhes Adhes 24(2) 171-177 Shenton MJ, Stevens GC (2001) Surface modification of polymer surfaces atmospheric plasma versus vacuum plasma treatments. J Phys D Appl Phys 34(18) 2761-2768 Baltazar-Y-Jimenez A et al (2008) Atmospheric air pressure plasma treatment of lignocellu-losic fibres Impact on mechanical properties and adhesion to cellulose acetate butyrate. Compos Sci Technol 68(l) 215-227... 

A. Baltazar-y-Jimenez, M. Bistritz, E. Schulz, and A. Bismarck, Atmospheric air pressure plasma treatment of lignocellulosic fibres Impact on mechanical properties and adhesion to cellulose acetate butyrate. Compos. Sci. Technol. 68(1), 215-227 (2008). 

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