A poly(N-β-aminoethyl-γ-aminopropylmethylsiloxane-co-dimethylsiloxane) ［ASO

of an amino content of 0.6 mmol/g and the number average molecular weight (Mn)= 14100］ was mixed with poly［γ-(N-β-carboxyacrylamido)propylmethylsiloxane-co-dodecylmethylsiloxane-co-dimethylsiloxane］(RCAS

of a carboxyl content of 0.3 mmol/g and Mn= 4048) in dilute ethyl acetate solution to form a polysiloxane electrostatic complex ASO/RCAS.Film morphology and the performance properties of the polysiloxane complex anchored on an oxidized silicon wafer and cotton fiber substrates were investigated and characterized by atomic force microscope (AFM)

X-ray photoelectron microscope (XPS) and other instruments.Like the single polysiloxanes in nature

the polysiloxane

complex ASO/RCAS

exhibited good film-forming ability and formed a macroscopic smooth but actually rugged film on both the wafer and cotton substrates.On the wafer surface

ASO/RCAS showed a morphology very different from ASO and RCAS.There were many small humps on the film surface.The film thickness was 1.501 nm

and the root mean square roughness (Rq) was 0.5 nm in 2 μm ×2 μm scanning field.ASO/RCAS could be used to modify the morphology and performance of the treated fiber/fabric

and provided the treated fabrics with an improved softness

good wettability as well as a pleasant oily tactile in hand evaluation.As ASO/RCAS covered fibers

the stripes or grooves of the treated cotton surface disappeared

and Rq was lowered to 11.7 nm.By contrast

the Rq of the untreated cotton fiber was 246 nm.In addition

the optimum performance was obtained for the cotton fabric treated by ASO/RCAS at mass ratio of ASO to RCAS 1∶1.