کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
594277 1453974 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of polyvinylpyrrolidone on rheology of aqueous SiC suspensions dispersed with poly(aspartic acid)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Effect of polyvinylpyrrolidone on rheology of aqueous SiC suspensions dispersed with poly(aspartic acid)
چکیده انگلیسی

Poly(aspartic acid) (PASP) as environmental friendly and biodegradable polymer has been considered to replace polyacrylic acid (PAA) for years. In this work, effect of polyvinylpyrrolidone (PVP) on the rheological properties on aqueous SiC suspensions dispersed with PASP was investigated. PASP (0.3 wt%) and PVP (0.1 wt%) co-stabilized suspensions at different pH and solid loadings can achieve better dispersion at lower dosages of dispersants than those with only PASP (0.7 wt%). The complex of anionic PASP molecules and nonionic PVP molecules through intermolecular hydrogen bonding provided enhanced steric hindrance, and resulted in improved stability.

Poly(aspartic acid) (PASP) can well disperse aqueous SiC suspensions. Small addition (0.1 wt%) of PVP had a significant influence on the rheological behavior of SiC suspensions dispersed with PASP. The association of PVP molecules with the PASP molecules provided enhanced steric hindrance for the SiC suspensions.Figure optionsDownload as PowerPoint slideHighlight
► PASP can replace PAA in dispersing aqueous SiC suspensions.
► Small addition of PVP improved the rheology of SiC suspensions with PASP distinctly.
► The mixture of PASP and PVP provided enhanced steric hindrance for the SiC suspensions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 399, 5 April 2012, Pages 108–111
نویسندگان
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