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Chemistry and Industry of Forest Products ›› 2014, Vol. 34 ›› Issue (5): 109-114.doi: 10.3969/j.issn.0253-2417.2014.05.018

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Synthesis and Properties of Rosin-based Polyoxyethylene Amine Gemini Surfactants

WANG Juan, WANG Dan, SHANG Shi-bin, SHEN Ming-gui, QI Fan   

  1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab.for Biomass Chemical Utilization;Key and Open Lab.of Forest Chemical Engineering, SFA;Key Lab.of Biomass Energy and Material, Jiangsu Proince, Nanjing 210042, China
  • Received:2013-07-09 Online:2014-10-25 Published:2015-08-18
  • Contact: 商士斌,研究员,博士生导师,主要从事生物质资源化学与利用研究工作;E-mail:shangsb@hotmail.com E-mail:shangsb@hotmail.com

Abstract: Four rosin-based polyoxyethylene amine gemini surfactants N,N'-methoxypolyethylene glycols-N,N'-dehydroabietylamine-α,ω-promethylene diamine (RPG550, RPG1000, RPG2000, and RPG5000) with different molecular weights, were synthesized from dehydroabietylamine through N-alkylation reactions. The structures of these compounds were confirmed by FT-IR and 1H NMR, and their surface activities were investigated and analyzed. The results showed the CMC and γcmc values of these four compounds were lower than that of commercial TX-10. The CMC values of RPG550, RPG1000, RPG2000, RPG5000 and TX-10 were 1.00×10-3, 9.75×10-4, 5.25×10-4, 1.90×10-4, and 2.03×10-3 mol/L, respectively. The γcmc values of these surfactants were 26.4, 27.5, 22.8, 22.2, and 31.6 mN/m, respectively. These compounds have excellent emulsifiability in the turpentine/water system and the liquid paraffin/water system. They also have good foam inhibition and defoaming power properties, and the foam inhibition property of RPG is significantly better than that of TX-10.

Key words: rosin, synthesis, polyoxyethylene amine, gemini surfactant, surface activities

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