论文部分内容阅读
采用成核/晶化隔离法(SNAS)制备了晶体结构完整、晶相单一的纳米量级NiAl-NO3-LDHs.使NiAl-NO3-LDHs与LDPE在双辊炼塑机上进行充分混合制备了NiAl-NO3-LDHs/LDPE复合材料,在紫外光照射下复合材料颜色发生了明显变化,由照射前的橄榄绿色变成青灰色,80℃加热后又恢复到橄榄绿色.考察了NiAl-NO3-LDHs的添加量和光照时间等因素对复合材料光致变色性能的影响,结果表明,随NiAl-NO3-LDHs加入量的增加复合材料光致变色现象趋于明显,当加入量达到5%时,复合材料表现出良好的光致变色性能;紫外光照射20min后颜色变化达到最大值;将NiAl-NO3-LDHs和LDPE进行复合,可以显著提高NiAl-NO3-LDHs的光致变色稳定性,复合材料光致变色性能表现出良好的重复性.加入纳米量级的NiAl-NO3-LDHs,对复合材料的力学性能也起到了一定程度的改善作用.
Nano-scale NiAl-NO3-LDHs with complete crystal structure and single crystal phase were prepared by nucleation / crystallization isolation method (SNAS). NiAl-NO3-LDHs and LDPE were mixed thoroughly on a two- -NO3-LDHs / LDPE composites under UV irradiation, the color of the composite changed significantly from olive green to blue-gray before irradiation and returned to olive green after heated at 80 ° C. The effects of NiAl-NO3-LDHs The results showed that the photochromism of the composites tended to be obvious with the addition of NiAl-NO3-LDHs. When the addition amount reached 5%, the composite The materials exhibited good photochromic properties. The maximum change of color after UV irradiation for 20 min. The composite of NiAl-NO3-LDHs and LDPE could significantly improve the photochromic stability of NiAl-NO3-LDHs. Induced discoloration showed good repeatability.With the addition of nano-scale NiAl-NO3-LDHs, the mechanical properties of the composites also played a certain degree of improvement.