کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
610334 | 880647 | 2009 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Arrangements of cationic starch of varying hydrophobicity on hydrophilic and hydrophobic surfaces Arrangements of cationic starch of varying hydrophobicity on hydrophilic and hydrophobic surfaces](/preview/png/610334.png)
Arrangements of cationic starches hydrophobized by acetylation (CS-acet) deposited from aqueous electrolyte solutions onto hydrophilized and hydrophobized silica surfaces were investigated by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and contact angle measurements. The influence of electrolyte composition, acetylation degree of cationic starch (DSACET), and deposition method was examined. On a hydrophobic substrate, CS-acet formed an open film with structure strongly dependent on DSACET and electrolyte composition of the solution. On a hydrophilic substrate, acetylation increased the hydrophobicity of the film when the starch was deposited by adsorbing. When deposition was made by spin coating, i.e., the CS-acet was forced onto the substrate, the hydrophobic tuning by acetylation was lost. The films deposited by spin coating were thicker and considerably rougher than those deposited by adsorbing.
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Journal: Journal of Colloid and Interface Science - Volume 336, Issue 1, 1 August 2009, Pages 21–29