Synthesis and Properties of Green Sustainable Carbonate-type Nonionics Containing Polyoxyethylene Chains

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  • Banno Taisuke
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University
  • Sato Hiroshi
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University
  • Tsuda Takayuki
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University
  • Matsumura Shuichi
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University

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A series of polyoxyethylene surfactants containing carbonate linkages as biodegradable and chemically recyclable segments was designed and synthesized by a green process. A two-step carbonate exchange reaction was used: dimethyl or diphenyl carbonate was reacted with 1-alkanol, and the product was reacted with poly (ethylene) glycol in the presence of a lipase or chemical catalyst. The obtained carbonate-type nonionics exhibited good surface-active properties such as a low critical micelle concentration value and a surface tension lowering action. They were readily biodegraded by activated sludge, furthermore, could be chemical recycled using a lipase.

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