A simple method for preparing super-hydrophobic powder from paper sludge ash

作者：Spathi Charikleia; Young Neale; Heng Jerry Y Y; Vandeperre Luc J M; Cheeseman Chris R^*

来源：Materials Letters, 2015, 142: 80-83.

DOI：10.1016/j.matlet.2014.11.123

• Biomimetic
• Functional
• Powder technology
• Surfaces
• Hydrophobic

Paper sludge ash (PSA) is a readily available waste material generated by the paper recycling industry. This work reports on the production of hydrophobic powders by dry milling PSA in the presence of a fatty acid surface functionalising agent. Optimum laboratory processing involves dry milling for 8 h with a 4 wt.% addition of stearic acid and this produced a super-hydrophobic powder with a water contact angle of 153 degrees. Different chain length fatty acids were investigated but stearic acid produced the highest hydrophobicity. The super-hydrophobicity of PSA results from the micro-particulate texture induced by dry milling with simultaneous formation of calcium stearate self-assembling surface monolayers chemically bonded to fracture surfaces.

• 出版日期2015-3-1