Influence of polyacrylamide on the surface free energy and wettability of a chernozem soil

Polyacrylamide at Solid/Liquid Interfaces

“…Thus, the reconformation would appear to be of smaller amplitude when the adsorbent bears a net negative charge. Equation [26] provides the rate of the interfacial reconformation (curve b in Fig. 20), which is initially faster than that when only attractive forces are operative (curve a).…”

“…If the flattening is as usual expected to stop after a given adsorption period as due to the limited size of a polymer chain, the variation with time of the surface area S(t) is given by [26] where S(eq) corresponds to the area of an adsorbed polymer when no neighbor prevents full flattening. The final surface coverage C S (mg/m 2 ) is related to the experimental parameters J V (ml/min ϫ m 2 ) and C 0 (mg/ml) and the polymer characteristics C S (0), C S (eq) (mg/m 2 ), and R (min) are obtained through…”

Adsorption of cationic polyacrylamide onto sepiolite

“…Through this binding action, the PAM solution induces clay stabilization, making clay particles to stick readily to one another to form aggregates [8]. Owing to alterations in particle surface physicochemical properties after polymer coating, wettability of clay particles coated with polymers differs from that of uncoated particles [9][10][11][12][13].…”

Field Results Using Polyacrylamide to Manage Furrow Erosion and Infiltration

“…PAM increases soil wettability (Janczuk et al 1991) and liquid limit (Bryan 1992). PAM treatments increase water-stable aggregation in soils (Terry and Nelson 1986;Helalia and Letey 1989;Nadler and Letey 1989;Bryan 1992) and stabilize shrinkage cracks in clayey soils against imbibitional swelling forces (Malik et al 1991a).…”