92168.pdf
152 The solid-liquid interface Figure 6,1 When S is negative, the liquid remains as a drop having a definite angle of contact, 0 ...
The solid-liquid interface 153 which, combined with equation (6.2), gives (6.5) TLG or, for non-polar liquids, where (6.6) For a ...
154 The solid-liquid interface Adhesional wetting In adhesional wetting, a liquid which is not originally in contact with the so ...
The solid-liquid interface 155 (1 + cos 0) (6.8) For zero contact angle, cos 0 = 1 and W.d = 2 yLG - Wc; therefore, zero contact ...
156 The solid-liquid interface 1, Contamination of the liquid usually influences the contact angle. 2, Solid surfaces differ fro ...
The solid-liquid interface 151 Figure 6.3 Tilting plate method for the measurement of contact angles in Figure 6.3 can be used; ...
158 The solid-liquid interface In a related method^176 the contact angle is determined by measuring the rate of penetration of l ...
The solid-liquid interface 159 penetrate and fill up most of the hollows and pores in the solid and so form a plane surface whic ...
160 The solid-liquid interface agents also find considerable application in the textile industry for the purpose of obtaining ev ...
The solid-liquid interface 161 silica and glass surfaces; it reacts with the -OH groups on the outside of the silicate lattice w ...
162 The solid-liquid interface The world-wide treatment of crude ore by flotation amounts to c. 109 tonne per year. By concentra ...
The solid-liquid interface 163 •Q-~s Figure 6.7 lead sulphide to float. In this way the components of a mixed ore can be separat ...
164 The solid-liquid interface CH 2 COOR CH 2 OH RCOONa i I CHCOOR' + 3NaOH = CHOH + R'COONa ! I CH 2 COOR" CH 2 OH R"COONa fat ...
The solid-liquid interface 165 fibres), or a part of the body (skin, hair, teeth). The dirt may be liquid or solid (usually it i ...
166 The solid-liquid interface The action of the detergent is to lower -yDW and ysw, thus decreasing WSD and increasing the ease ...
The solid-liquid interface 167 action yet are poor foaming agents, and the psychological tendency to correlate these two propert ...
168 The solid-liquid interface fa) Air (b) Water (c) Figure 6.10 Removal of dirt from a solid surface by detergent and mechanica ...
The solid-liquid interface 169 dirt redeposition. Optical brighteners are commonly incorporated into detergents used for washing ...
170 The solid-liquid interface in general, more complicated than that of gas adsorption, since adsorption from solution always i ...
The solid-liquid interface 171 the individual adsorption isotherms can be calculated from the apparent (or composite) adsorption ...
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