Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (2): 192-199.DOI: 10.11944/j.issn.1000-0518.2015.02.140185

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Microwave Synthesis and Characterization of O-Hydroxypropyl-N-octyl Chitosan

WEN Junjie, ZHOU Li*, WANG Ziwei, WEN Caihong, LIU Bo   

  1. School of Chemistry and Chemical Engineering,Shenzhen University,Shenzhen,Guangdong 518060,China
  • Received:2014-05-23 Revised:2014-08-19 Published:2015-02-10 Online:2015-02-10
  • Contact: Corresponding author:ZHOU Li, professor; Tel:0755-26557381; Fax:0755-26536141; E-mail:zhouli_2050@163.corn; Research interests:polymer composite materials; fine chemical industry
  • Supported by:

    Supported by Shenzhen Basic Research Project(No.JCYJ20130329102614715), Shenzhen Special Funds for the Development of Strategic Emerging Industries(No.JSGG20120614164013545)

Abstract:

O-hydroxypropyl-N-octyl chitosan(C8-HPCS) was prepared by reacting 1-octyl bromide with O-hydroxypropyl chitosan(HPCS) under microwave heating. HPCS was prepared with chitosan and propylene oxide in presence of phase transfer catalyst tetrabutylammonium bromide. The intermediate HPCS and the objective product C8-HPCS were characterized by FTIR and 1H NMR spectroscopy. The results show that C8-HPCS has an excellent integrated performance when the reaction time is 50 min, the temperature is 65 ℃, the dosage of bromooctane is 8 mL and the dosage of tetrabutylammonium bromide is 0.07 g. The foamability, foaming property and emulsibility are 3.9 cm, 88.9% and 78.1%, respectively. The critical micelle concentration of C8-HPCS is 0.015 g/L with the surface tension of 58.5 mN/m and the hydrophile lipophile balance number is 13.44. The thermal stability analysis shows that the C8-HPCS is stable up to 270 ℃ and the XRD analysis indicates that the quaternized chitosan is completely amorphous.

Key words: microwave method, phase-transfer catalysis, chitosan derivatives, surfactant

CLC Number: