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聚丙烯酸/SiO2杂化纤维的制备与表征

Preparation and Characterization of Continuous PAA/SiO2 Hybrid Fibers by Sol-Gel Method

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【作者】 宋秋生史铁钧王华林

【Author】 SONG Qiu-Sheng,SHI Tie-Jun,WANG Hua-Lin(School of Chemical Engineering,Hefei University of Technology,Hefei 230009)

【机构】 合肥工业大学化工学院合肥工业大学化工学院 合肥230009合肥230009

【摘要】 采用溶胶凝胶-原位聚合法以正硅酸乙酯(TEOS)为硅源、乙烯基三乙氧基硅烷(VTEOS)为偶联剂制备了活性SiO2溶胶,经水解、缩合,再于引发剂AIBN作用下与丙烯酸进行原位聚合杂化,制得聚丙烯酸/SiO2杂化溶胶,陈化后用拉丝法制得聚丙烯酸/SiO2杂化纤维。研究了溶胶的杂化机理、成纤性能;采用红外光谱、扫描电子显微镜分析了杂化纤维的结构和微观形态;进行了杂化纤维的TGA和耐水性能测试。结果表明,该聚丙烯酸/SiO2杂化溶胶拉丝性能好,可拉丝时间达1h,杂化溶胶在粘度为1400~3000mPa.s时成纤性能好,可通过拉丝法制得形态良好的杂化纤维;聚丙烯酸与SiO2之间通过化学键作用,在纤维内部有机无机两相间形成均一的连续相;聚丙烯酸/SiO2杂化纤维的耐热和耐水性能均优于纯PAA。

【Abstract】 By sol-gel in-situ polymerization method,a reactive hybrid sol was prepared with tetrethorylsilane(TEOS) as silicon source,vinyltrithorylsilane(VTEOS) as coupling agent via hydrolysis and condensation,then acrylic acid containing AIBN was added to it and polymerized in-situ.After being aged,continuous PAA/SiO2 hybrid fibers were prepared by drawing from this hybrid sol.The mechanism of hybrid reaction,spinnablity of the hybrid sol,structure and micromorphology and performance of the fiber were studied by FT-IR,TGA,SEM and experiment of immersion in water.The results show that the hybrid sol can be drawn into fibers when its viscosity become 1 400~3 000 mPa·s,its spinning time reaches 1 h,PAA was linked with SiO2 networks by chemical bonds.In the interior of the fiber,a homogeneous and continuous phase was formed by organic and inorganic components,and the hybrid fiber is better in resistance to heat and to water than pure PAA.

【基金】 国家自然科学基金资助项目(50373010)
  • 【文献出处】 应用化学 ,Chinese Journal of Applied Chemistry , 编辑部邮箱 ,2007年08期
  • 【分类号】TQ340.6
  • 【被引频次】10
  • 【下载频次】306
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