中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (07): 753-758.DOI: 10.3724/SP.J.1095.2011.00441

• 研究论文 • 上一篇    下一篇

有机硅氧烷预聚体的合成及其在化学固沙中的应用

赵水侠,王来来*   

  1. (中国科学院兰州化学物理研究所，羰基合成与选择氧化国家重点实验室 兰州 730000)
  • 收稿日期:2010-07-29 修回日期:2010-12-27 出版日期:2011-07-10 发布日期:2011-07-10
  • 通讯作者: 王来来，研究员; Tel:0931-4968161; Fax:0931-4968129; E-mail:wll@licp.cas.cn; 研究方向：不对称催化和功能高分子合成
  • 基金资助:
    甘肃省科技支撑计划项目（0708NKCA119），中国科学院“西部之光”联合学者项目

Synthesis of Organosilixane Prepolymer and Their Application in Chemical Sand-fixing

ZHAO Shuixia, WANG Lailai*   

  1. (State Key Laboratory for Oxo Synthesis & Selective Oxidation,Lanzhou Institute of
    Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000)
  • Received:2010-07-29 Revised:2010-12-27 Published:2011-07-10 Online:2011-07-10
  • Contact: wang lailai

PDF

2077

被引次数

25 | 4

摘要：

以甲基三乙氧基硅烷为反应物，在盐酸催化下水解缩合，合成无色透明粘稠的液体有机硅氧烷预聚体，IR和1H NMR表征证实其为目的产物；当有机硅氧烷预聚体与工业乙醇的体积比为1∶1，以质量分数0.60%的NaOH-CH3OH溶液为固化剂，加入该溶液0.05 mL，在30 ℃，预聚体交联固化时间为9 min；在50 ℃，预聚体交联固化时间为4 min；首次将有机硅氧烷预聚体，或它与聚乙烯醇（PVA20-88）的混合物用作化学固沙剂，形成的固结层具有较好的耐水性和较高的抗剪强度；当PVA20-88与有机硅氧烷预聚体的质量比为1∶4时，粘聚力达到483.7 kPa，内摩擦角为68.39°，在160 h的紫外光照射下，具有很好的耐老化性。

关键词: 甲基三乙氧基硅烷, 有机硅氧烷预聚体, 聚乙烯醇, 室温固化, 化学固沙剂

Abstract:

Organosilixane prepolymer derived from methyltriethoxylsilane was synthesized, and characterized by IR and 1H NMR. The hydrolysis and condensation of the methyltriethoxylsilane were carried out in the presence of a catalytic amount of hydrochloric acid. Using 0.60% NaOH.CH3OH solution as curing agent, the curing performance of the prepolymer at various temperature was investigated. The curing time was 9 min at 30 ℃, and 4 min at 50 ℃, when 0.05 mL 0.60%NaOH-CH3OH was added to prepolymer-industrial ethanol solution with the volume ratio of the prepolymer to industrial ethanol at 1∶1. The mixture of organosilixane prepolymer and polyvinyl alcohol(PVA) was used as chemical sand-fixing material for the first time. The crust, which was formed by using this material, had good water resistance, ageing resistance(under 16 h ultraviolet irradiation), and shear strength value. The cohesion value was 483.7 kPa, and the angle of internal friction was 68.39°, when the mass ratio of polyvinyl ethanol to organosilixane prepolymer was 1∶4.

Key words: methyl triethoxysilane, organosilixane prepolymer, polyvinyl alcohol, room-temperature curing, chemical sand-fixing agent

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