Polystyrene Microspheres Coated with Smooth Polyaniline Shells: Preparation and Characterization

Polystyrene/polyaniline core-shell structure microspheres were synthesized in the presence of poly(sodium 4-styrenesulfonate) as stabilizer and hydrochloric acid as dopant to improve the processibility of conducting polyaniline. After the one-pot reacting process, the product was easily purified by washing with water. The polyaniline shell covering the polystyrene sphere surface was confirmed with FT-IR and X-ray photoelectron spectroscopy. The conductivity of the polyaniline-coated polystyrene particles was 0.0017 S/cm and increased to 0.1 S/cm after being doped in the HCl vapor. The morphology of the microspheres was characterized by TEM and SEM. The particles show a more uniform and smooth surface than previous particles.     

用于胶版印刷的可热固化环氧树脂/异氰酸酯体系

提出了一种以聚二甲基硅氧烷(PDMS)为印刷滚筒的、在玻璃基材表面可大面积印刷聚合物图案的胶版印刷技术,并开发了相应的油墨。该油墨由环氧树脂基聚合物BPAN及异佛尔酮二异氰酸酯(IPDI)组成的热固性双组分聚合物体系和红色分散颜料组成。采用原位红外光谱法研究了热固性体系的热固化。结果表明BPAN/IPDI双组分体系有良好的热固化性能。固化薄膜具有良好的耐溶剂性能和光学性能。应用本工艺得到分辨率为100μm的聚合物图案。     

水溶性聚苯胺/碳纳米管复合材料的制备及光限幅性能

为了制备激光防护材料,采用原位聚合法制备了水溶性聚苯胺/多壁碳纳米管复合材料。通过红外光谱分析、紫外-可见光光谱、透射电子显微镜等表征,用方形四探针法测量薄膜电导率。结果表明,水溶性聚苯胺包裹在碳纳米管表面,聚苯胺包裹层的厚度大约在15～25nm;复合材料的薄膜电导率较水溶性聚苯胺的电导率提高了一个数量级。复合材料水分散液在低入射光强下透光率接近85%时;入射光强达到2.5J/cm2,透光率降至11%。因此,复合材料水分散液的光限幅性能优于碳纳米管,具有良好水分散性,有望实现材料的器件化。     

水溶性聚苯胺/碳纳米管复合材料的制备及光限幅性能

为了制备激光防护材料,采用原位聚合法制备了水溶性聚苯胺/多壁碳纳米管复合材料。通过红外光谱分析、紫外-可见光光谱、透射电子显微镜等表征,用方形四探针法测量薄膜电导率。结果表明,水溶性聚苯胺包裹在碳纳米管表面,聚苯胺包裹层的厚度大约在15～25 nm;复合材料的薄膜电导率较水溶性聚苯胺的电导率提高了一个数量级。复合材料水分散液在低入射光强下透光率接近85%时;入射光强达到2.5 J/cm2,透光率降至11%。因此,复合材料水分散液的光限幅性能优于碳纳米管,具有良好水分散性,有望实现材料的器件化。     

含联苯基团热致型液晶聚氨酯的合成与表征

用溶液聚合的方法，联苯二酚、甲苯二异氰酸酯、丁二醇三元共缩聚合成了具有液晶性的主链型聚氨酯，在二甲基乙酰胺（ＤＭＡｃ）溶剂体系中研究了酚羟基与芳族二异氰酸酯反应的条件，并用偏光显微镜法，示差扫描量热法和广角Ｘ射线衍射法研究了聚氨酯的液晶性质，证明合成的聚氨酯显示向列型液晶态，并且有较宽的液晶温度范围。