引用本文:
杨光, 聂德林, 张俐娜. 紫外光固化的聚氨酯-丙烯酸酯-纤维素复合膜[J]. 应用化学,
1996, 13(4): 21-24.
Citation: Yang Guang, Nie Delin, Zhang Lina. Polyurethane-Acrylate-Cellulose Composite Film Cured by UV Irradiation[J]. Chinese Journal of Applied Chemistry, 1996, 13(4): 21-24.
Citation: Yang Guang, Nie Delin, Zhang Lina. Polyurethane-Acrylate-Cellulose Composite Film Cured by UV Irradiation[J]. Chinese Journal of Applied Chemistry, 1996, 13(4): 21-24.
紫外光固化的聚氨酯-丙烯酸酯-纤维素复合膜
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.
English
Polyurethane-Acrylate-Cellulose Composite Film Cured by UV Irradiation
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.
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Key words:
- polyurethane
- / regenerated cellulose
- / composite film
- / UV curing
- / water-resistance
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