Chinese Journal of Applied Chemistry ›› 2011, Vol. 28 ›› Issue (06): 722-726.DOI: 10.3724/SP.J.1095.2011.00464

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Synthesis of Anionic Trisiloxane Surfactant and Its Properties

HUANG Liangxian*, DING Yang, HUANG Jie, GAO Rong, AN Qiufeng   

  1. (Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry,Ministry of Education,
    Shaanxi University of Science & Technology,Xi′an 710021)
  • Received:2010-08-09 Revised:2010-11-15 Published:2011-06-10 Online:2011-06-10
  • About author:HUANG Liangxian, associate professor; Tel: 029-86168315; Fax: 029-86168319; Email: hlxw-1@163.com; Research direction: synthesis and its application of silicone material

Abstract:

A new kind of anionic trisiloxane surfactant(ATSS) was synthesized by the ringopening reaction of maleic anhydride(MA) with hydroxyl terminated polyether group trisiloxane(HPETS). HPETS was prepared by hydrosilylation from 1,1,1,3,5,5,5-heptamethyltrisiloxane(MDHM) and allyl polyoxyethylene ether(APE) in the presence of platinum catalyst. The chemical structure of ATSS was characterized by IR. The interfacial properties of ATSS were measured, and its application was investigated in pesticide. Experimental results show that ATSS exhibits excellent surface activity. The critical micelle concentration(cmc) of ATSS solution is 1.3 g/L. The surface tension(γcmc) of ATSS solution in cmc is 24.5 mN/m. When ATSS was respectively added with 0.1% into emamectin benzoate 2.5% EC, glyphosate isopropylamin 41% AS and thiophanate-methyl 36% SC diluted to 1 000 times with water, the surface tension of emamectin benzoate solution, glyphosate isopropylamin solution and thiophanate-methyl solution was decreased respectively from 31.92 mN/m, 55.20 mN/m and 39.66 mN/m to 24.92 mN/m, 25.47 mN/m and 27.13 mN/m; while the contact angle on potherb spinach leaf was reduced respectively from 62.5°, 68.0° and 57.0° to 37.0°, 39.0° and 40.5°.

Key words: trisiloxane, anionic surfactant, carboxylic acid, pesticide auxiliaries, interfacial property

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