Preparation and the foaming activity of hydroxymethyl octadecyltrimethyl ammonium chloride
Author:
Lv Shiyi1, Liu Qiaona1, Dong Sanbao1, Li Jinling1, Zhang Jie1, Wang Manxue12, Chen Gang123
Affiliation:
1. Shaanxi Province Key Laboratory of Environmental Pollution Control and Reservoir Protection Technology of Oilfields , Xi’an Shiyou University , Xi’an 710065 , P. R. China 2. Shaanxi Key Laboratory of Lacustrine Shale Gas Accumulation and Exploitation (Under planning) , Xi’an , 710060 , P. R. China 3. College of Chemistry and Chemical Engineering , Xi’an Shiyou University , Xi’an , Shannxi Province 710065 , P. R. China
Abstract
Abstract
In this work, hydroxymethyl octadecyltrimethyl ammonium chloride (HM-OTAC) was obtained from the reaction between octadecyltrimethyl ammonium chloride (OTAC) and formaldehyde in different molar ratios. The effects of the reaction conditions (different molar ratios) on the properties of the product (surface tension, foaming, high temperature resistance, methanol resistance and salt resistance) were investigated. The results showed that the HM-OTAC produced under different molar ratios could lower the surface tension of water solutions more than the surfactant OTAC. The HM-OTAC (1:2) reduced the surface tension to 28.29 mN m−1. The HM-OTAC produced under other molar ratios gave higher interfacial tensions than HM-OTAC (1:2). With increasing surfactant concentration, the foam volume first increased and then gradually decreased. At a concentration of 0.3 wt.%, the highest foam volume (460 mL) was produced with HM-OTAC (1:3). Compared to OTAC, the foams produced by each HM-OTAC surfactant exhibited higher temperature stability. In the presence of 30 mL methanol, the initial foam volume of all HM-OTAC surfactants (0.3 wt.%) was generally higher than that of OTAC. With 300 mL HM-OTAC (1:4) solution, the highest foam volume of 20.2 mL could be produced. HM-OTAC (1:3) showed the highest salt resistance.
Publisher
Walter de Gruyter GmbH
Subject
Condensed Matter Physics,General Chemical Engineering,General Chemistry
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