科研之友
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摘要
The utilization of jet-cooked waxy and normal corn starch to prepare aqueous dispersions of hydrophobic carbon black (CB; Vulcan XC-72R) is reported. Blending into aqueous jet-cooked dispersions of starch followed by high-pressure homogenization produced stable aqueous CB dispersions. The dispersed CB particles were shown to have starch adsorbed onto their particle surfaces. The adsorbed starch imparted hydrophilic properties to the CB, and after extensive washing to remove dissolved and loosely bound starch, the CB particles remained well dispersed in water. Thermogravimetric analysis, Fourier transform infrared spectroscopy, acid and enzymic starch digestion experiments, and microscopy (light and transmission electron microscopy) were used to characterize the starch-coated CB particles. The method described herein demonstrates a simple, effective, and environmentally friendly method for preparing aqueous CB dispersions.
- 出版日期2012-10-25
