中华医学超声杂志

应用化学 ›› 1996, Vol. 0 ›› Issue (4): 21-24.

• 研究论文 • 上一篇    下一篇

紫外光固化的聚氨酯－丙烯酸酯－纤维素复合膜

杨光, 聂德林, 张俐娜   

  1. 武汉大学化学系 武汉 430072
  • 收稿日期:1995-10-06 修回日期:1996-03-18 出版日期:1996-08-10 发布日期:1996-08-10
  • 基金资助:
    国家经济贸易委员会资助

Polyurethane-Acrylate-Cellulose Composite Film Cured by UV Irradiation

Yang Guang, Nie Delin, Zhang Lina   

  1. Department of Chemistry, Wuhan University, Wuhan 4300723
  • Received:1995-10-06 Revised:1996-03-18 Published:1996-08-10 Online:1996-08-10

PDF

535

被引次数

1

摘要： 再生纤维素膜(甘蔗渣浆制)表面直接用紫外光固化聚氨酯-丙烯酸酯制备出防水性复合膜。由红外光谱和扫描电镜研究了复合膜的结构。同时,测定了膜的防水性、力学性能、水汽透过性和尺寸稳定性。实验结果表明,当聚氨酯：丙烯酸酯为40:55(质量比),在400W紫外光下固化5min制得的复合膜具有致密的表面结构和较好的性能,该膜经水浸泡后其断裂强度可达干膜的90%,浸水收缩率和膨胀率均小于2.5%,水汽渗透量仅为再生纤维素膜的1/4.由此表明复合膜的防水性和尺寸稳定性明显提高。此外,该复合膜在可见光区的透光率在80%～90%之间,而且对紫外光有屏蔽作用。

关键词: 聚氨酯, 再生纤维素, 复合膜, 紫外光固化, 防水性

Abstract: A composite film with water-resistance was prepared by curing polyurethane-acry-late on regenerated cellulose film (from bagasse pulp) under UV-irradiation. The structures of films were studied by IR and SEM. The water-resistance, mechanical properties, water vapor permeability and size stability of the films were measured.The experimental results showed that when polyurethane/arcylate is 40:55 by mass,the composite film prepared under 400 W UV irradiation for 5 min possesses dense surface structure and good mechanical properties. After being soaked in water,the tensile strength retained 90% that of dry film,the shrinkage and swelling were less than 2.5%,and the water vapor permeability was a quarter of that of uncured cellulose film. The water-resistance and size stability of the composite film were improved significantly.In addition,its transmittance in visible range is 80%～90% and it can shield UV light.

Key words: polyurethane, regenerated cellulose, composite film, UV curing, water-resistance

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