• studies on the film elasticity and adsorption behavior of some commercial frothers

    نویسندگان :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1389/07/20
    • تاریخ انتشار در تی پی بین: 1389/07/20
    • تعداد بازدید: 957
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the surface activity, film elasticity, and adsorption behavior of several commercial frothers, including n-pentanol, n-hexanol, n-octanol, methyl isobutyl carbinol (mibc), methoxy polypropylene glycol (d250), and polypropylene glycol (ppg-400) were evaluated through the analysis of surface tension data. results showed that alcohol frothers with higher molecular weight and lower hydrophile-lipophile balance (hlb) value produce more closed packed cohesive film improving film elasticity and surface activity. in spite of equal molecular weight and hlb, simple straight chain molecules of n-hexanol provided higher surface activity compared to mibc of large dimension branched structure which was confirmed by their molecular area plots. ether frothers were found to be more surface active than alcohol frothers, since they have higher molecular weight and several oxygenated units in their structure, increasing film elasticity more significantly. the comparison of hlb value and molecular area of ethers insinuated that molecular weight is the most dominant parameter controlling interfacial behavior of frothers.

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