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Biomass Chemical Engineering ›› 2019, Vol. 53 ›› Issue (6): 22-26.doi: 10.3969/j.issn.1673-5854.2019.06.004

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Preparation and Application of Emulsifier Based on Undecylenic Acid

Yonghe ZHANG1,2,Gaowei FU1,2,Liwei JIN1,*()   

  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
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2018-11-15 Online:2019-11-30 Published:2019-12-10
  • Contact: Liwei JIN E-mail:liwei-jin@163.com
  • Supported by:


Undecylenic acid/maleic anhydride-dodecanol (UMA-DA) polymer was prepared by esterification reaction using dodecanol(DA) and undecylenic acid(UA)/maleic anhydride(MAH) as copolymer.The polymer is used as an emulsifier in the emulsion polymerization of UA and methyl methacrylate(MMA). FT-IR analysis showed that the self-made undecylenic acid/maleic anhydride(UMA) copolymer acted with DA by esterification of an acid anhydride with a hydroxyl group.The proton signal at δ 3.2-3.4 of —O—CH2—in 1H NMR show that UMA-DA copolymer was prepared successfully.The critical micelle concentration(CMC) value of UMA saponification was determined by surface tension method. The CMC value of UMA-DA was 9.6 g/L, and the surface tension γCMC was 23.04 mN/m. The γCMC value of UMA-DA is much lower than that of pure water(71.97 mN/m). The particle size and particle size distribution index(PDI) increased, butthe gel rate gradually decreasedwith the increase of UMA-DA dosage in emulsion polymerization. The emulsion is relatively stable, and the total monomer conversion rate reaches 98.1% when the amount of the self-made emulsifier UMA-DA is 10% of the total monomer and the ratio of UA to MMA is 10 : 90.

Key words: emulsifier, undecylenic acid, maleic anhydride, dodecanol

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