中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (03): 361-363.DOI: 10.3724/SP.J.1095.2011.00355

• 研究简报 • 上一篇    下一篇

辛酸亚锡对氧化锌催化制备丙交酯的影响

程超*,薛艳,宋兴华   

  1. (河南省南阳理工学院生物与化学工程学院 南阳 473004)
  • 收稿日期:2010-06-21 修回日期:2010-07-23 出版日期:2011-03-10 发布日期:2011-03-10
  • 通讯作者: 程超，讲师; Tel:0377-62076365; Fax:0377-62076380; E-mail:cheng2000chao@yahoo.com.cn; 研究方向：生物医用材料
  • 基金资助:
    河南省教育厅计划项目(2010C430001)，南阳理工学院青年基金(QNJJ200810)资助项目

The Effect of Stannous Octanoate on the Synthesis of Lactide with ZnO as Catalyst

CHENG Chao*, SONG Xinghua, XUE Yan   

  1. (Department of Biology and Chemical Engineering，Nanyang Institute of Technology,Nanyang 473004)
  • Received:2010-06-21 Revised:2010-07-23 Published:2011-03-10 Online:2011-03-10

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2089

被引次数

1

摘要：

用减压蒸馏法合成了丙交酯，在反应的不同时间段加入辛酸亚锡，可使丙交酯最高馏出温度降低至197 ℃。 采用红外光谱表征了丙交酯，测定了反应体系的表面张力和黏度，结果表明，脱自由水后的乳酸、脱自由水后加氧化锌和脱自由水后加氧化锌和辛酸亚锡体系的表面张力分别为38.8、47.0和40.3 N/m；黏度分别为43.1049、59.6774和48.9376 mPa·s。 辛酸亚锡的加入降低了反应体系表观张力和黏度，有利于低聚物结构中酰氧键断裂生成丙交酯。

关键词: 氧化锌, 辛酸亚锡, 丙交酯, 产率, 最高馏出温度

Abstract:

Lactide was synthesized under high vacuum using ZnO as catalyst with the addition of stannous octanoate(Sn(Oct)2) at different intervals. The highest temperature of lactide distillation was decreased to 197 ℃. Lactide crystal was characterized by means of IR spectrum and its melting point was measured. The surface tensions of L-lactic acids after dehydration, after dehydration followed with the addition of zinc oxide or addition of both zinc oxide and stannous octanoate were 38.8, 47.0 and 40.3 N/m, respectively. Their viscosities were 43.1049, 59.6774 and 48.9376 mPa·s, respectively. These experimental results showed stannous octanoate can help the cracking of the bond between acyl and oxide in the intermediate and the decrease of surface tension of reaction system.

Key words: Zinc oxide, Stannous octanoate, lactide, yield, the highest distillation temperature

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