Neutron reflection has been used to investigate the adsorption of mixed nonionic surfactant and nonionic/anionic surfactant mixtures containing dodecanol, at the air/water interface. The measurements clearly demonstrate the preferential adsorption of the more surface active shorter ethylene oxide nonionic surfactants, particularly of dodecanol. The usual trend for the more surface active components to decrease their presence in the surface layer as the total surfactant concentration increases is not observed for dodecanol. This results from the occurrence of unfavorable micellar geometries in mixtures containing dodecanol which control adsorption through their effect on monomer concentration. Regular solution theory cannot be used to describe the behavior of these systems.
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China Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
China Univ Petr East China, Dept Petr Engn, Shandong Key Lab Oilfield Chem, Qingdao 266580, Peoples R ChinaChina Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
Wang, Zizhao
Dai, Caili
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China Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
China Univ Petr East China, Dept Petr Engn, Shandong Key Lab Oilfield Chem, Qingdao 266580, Peoples R ChinaChina Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
Dai, Caili
Liu, Jiawei
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PetroChina Southwest Oil & Gas Field Co, Shale Gas Res Inst, Chengdu 610051, Sichuan, Peoples R ChinaChina Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
Liu, Jiawei
Dong, Yunbo
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China Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
China Univ Petr East China, Dept Petr Engn, Shandong Key Lab Oilfield Chem, Qingdao 266580, Peoples R ChinaChina Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
Dong, Yunbo
Liu, Jinming
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China Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
China Univ Petr East China, Dept Petr Engn, Shandong Key Lab Oilfield Chem, Qingdao 266580, Peoples R ChinaChina Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
Liu, Jinming
Sun, Ning
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China Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
China Univ Petr East China, Dept Petr Engn, Shandong Key Lab Oilfield Chem, Qingdao 266580, Peoples R ChinaChina Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
Sun, Ning
Li, Lin
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China Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China
China Univ Petr East China, Dept Petr Engn, Shandong Key Lab Oilfield Chem, Qingdao 266580, Peoples R ChinaChina Univ Petr East China, Key Lab Unconvent Oil & Gas Dev, Minist Educ, Qingdao 266580, Peoples R China