Welcome to Chemistry and Industry of Forest Products,

Chemistry and Industry of Forest Products ›› 2022, Vol. 42 ›› Issue (3): 57-64.doi: 10.3969/j.issn.0253-2417.2022.03.008

Previous Articles     Next Articles

Synthesis and Properties of a Rosin-based Anionic Surfactant with Azobenzene Group

Shengfeng YE1,2, Zhaolan ZHAI1,*(), Shibin SHANG1, Zhanqian SONG1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2021-09-23 Online:2022-06-28 Published:2022-07-04
  • Contact: Zhaolan ZHAI E-mail:zhaizhaolan@hotmail.com

Abstract:

A rosin-based anionic surfactant with azobenzene group named sodium 4-maleopimaric acid ethyl ester azophenol(E-MPA-AZO-Na) was synthesized through D-A addition, amidation, diazotization, coupling reaction, esterification, and acid-base neutralization using rosin as raw material. Its structure was characterized by FT-IR and NMR. The surface activities and foam properties were investigated by surface tension method, Nile red(NR) fluorescence probe method and polarizing microscope. The results showed that the critical micelles concentration(Ccmc) of surfactant E-MPA-AZO-Na was only 0.035 mmol/L, the surface tension at the Ccmc(λcmc) was 47.11 mN/m, and the minimum area per molecule(amin) was 1.35 nm2, which meant that E-MPA-AZO-Na possesses excellent surface activities. Stable foams could be stabilized when the concentrations of E-MPA-AZO-Na were 0.375, 0.750 and 1.500 mmol/L. Better foaming abilities, smaller foam size and more stable foam emerged with increasing E-MPA-AZO-Na concentration. What's more, the half-life time of the foams formed at 0.375, 0.750 and 1.500 mmol/L were 1 292, 1 770 and 2 534 min, respectively, indicated that E-MPA-Azo-Na possessed outstanding foam stability.

Key words: rosin-based surfactant, systhesis, foam properties

CLC Number: