اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
حوزه های تحت پوشش رویداد
  • interactions of nanocrystalline cellulose with an oppositely charged surfactant in aqueous medium

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 926
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the interaction between negatively charged nanocrystalline cellulose (ncc) and a cationic surfactant, tetradecyl trimethyl ammonium bromide (ttab) was examined by isothermal titration calorimetry (itc), conductometric and potentiometric titrations and surface tensiometry. the interaction is controlled by electrostatic and hydrophobic interactions. itc and surface tension measurements confirmed the formation of electrostatically driven ncc–ttab complexes in the bulk and at the interface, which was followed by hydrophobically driven polymer-induced micellization of ttab on ncc rods. the critical micelle concentration (cmc) of ttab was shifted from 1.1 to 1.3 g/l in the presence of 0.655 g/l ncc. the settling and phase separation characteristics were quantified by determining the height of ncc flocs as a function of time, which describe the stability of ncc in the presence of ttab. zeta potential results revealed a charge reversal from negative to positive values with increasing ttab concentration, confirming the formation of ncc–ttab complexes in aqueous solutions. based on the results, a physical mechanism on the interaction of ncc and ttab is proposed.

سوال خود را در مورد این مقاله مطرح نمایید :

با انتخاب دکمه ثبت پرسش، موافقت خود را با قوانین انتشار محتوا در وبسایت تی پی بین اعلام می کنم
مقالات جدیدترین رویدادها
مقالات جدیدترین ژورنال ها