Tensiometry, dynamic light scattering, and optical spectrophotometry are employed to quantitatively characterize the aggregation behavior of a gemini (dicationic) surfactant in aqueous solutions in the presence of poly(ethylene glycol) with a molecular mass of 20000 Da or a Pluronic F127 block copolymer with a molecular mass of 12600 Da. It is shown that the formation of surfactant-polymer mixed aggregates decreases the positive surface potential of gemini surfactant micelles and is one of the main reasons for weakening of the micellar catalytic effect in hydrolysis of carboxylic acid esters.
机构:
Key Laboratory of Colloid and Interface Science of Chinese Academy of Sciences, Institute of Chemistry, Chinese Academy of Sciences, BeijingKey Laboratory of Colloid and Interface Science of Chinese Academy of Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing
Han Y.
Wang Y.
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Key Laboratory of Colloid and Interface Science of Chinese Academy of Sciences, Institute of Chemistry, Chinese Academy of Sciences, BeijingKey Laboratory of Colloid and Interface Science of Chinese Academy of Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing
机构:
King Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah 21589, Saudi ArabiaKing Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah 21589, Saudi Arabia
Azum, Naved
Rub, Malik Abdul
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King Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah 21589, Saudi Arabia
King Abdulaziz Univ, Ctr Excellence Adv Mat Res, Jeddah 21589, Saudi ArabiaKing Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah 21589, Saudi Arabia
Rub, Malik Abdul
Azim, Yasser
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Aligarh Muslim Univ, ZH Coll Engn & Technol, Dept Appl Chem, Aligarh 202002, Uttar Pradesh, IndiaKing Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah 21589, Saudi Arabia
Azim, Yasser
Asiri, Abdullah M.
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King Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah 21589, Saudi Arabia
King Abdulaziz Univ, Ctr Excellence Adv Mat Res, Jeddah 21589, Saudi ArabiaKing Abdulaziz Univ, Fac Sci, Chem Dept, Jeddah 21589, Saudi Arabia