5327

4997

كارشناسي ارشد

شيمي فيزيك

اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي

1388

چهارده،93ص.:مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

عزت كشاورزي، يوسف غائب

15/4/89

بيژن نجفي، بهزاد رضايي

شيمي

ID4997

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

The Imbibition of Some Electrolyte and Nonelectrolyte Fluids into Glassy Micro and Nano Channels Sara Gharangian Email sara gharangian@yahoo com 6 4 2010 Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi E Keshavarzi E mail keshavrz@cc iut ac ir Y Ghayeb E mail ghayeb@cc iut ac ir Abstract Imbibitions into micro and nano channels are very important because of their uses in separation of different component It is well known that liquids rising into micro and nano channels are different essentially from that of macro channels and these differences affect their applicability Liquid rising in macro channels obeys from the Laplace equation and depends on some factors such as liquid vapor surface tension contact angle of liquid with capillary tube wall and capillary tube radius but in micro and nano channels liquid rising do not obey the Laplace equation and depends on liquid viscosity and slipping length in addition to the aforementioned factors In fact in evaluating the liquid rising in micro and nano channels the weight force can be omitted but viscosity force cannot be omitted and so the equation which can delineate the liquid rises in such channels is Locus Washburn equation In this study two kind of electrolyte solution consist of Zinc Chloride and Sodium Chlorate and non electrolyte consist of n butane isobutene tertio butane n heptanes and n propane were used in order to investigate the imbibitions speed in micro channels The influence of factors such as micro tube length and diameter ionic concentration and strength in electrolyte solution and micro tube length and diameter and strict interaction in non electrolyte solution were studied and the influence of strict interaction of liquid molecules on imbibitions speed were computed and described According to the experimental results it was shown that micro tube length has no effect on imbibitions speed in liquids in micro tubes but increasing the micro tube diameter decrease imbibitions speed On the other side increasing the liquid concentration increases the imbibitions speed Liquid with higher ionic strength have more tendency to imbibe in micro channels and also have higher imbibitions speed In addition the more carbon content in compound or the longer carbon chain will result in decrease in imbibe speed in micro channels In nano channels it was shown that the more carbon content in compound or the longer carbon chain will result in decrease in imbibe speed Keywords Imbibition Micro and Nano Channels Capillary action Lucas Washburn equation

عزت كشاورزي، يوسف غائب

بيژن نجفي، بهزاد رضايي