用常规方法制备的层状双金属氢氧化物(简称LDHs)为片状结构.采用聚乙烯吡咯烷酮(PVP)为模板制备了弯曲片状的CaAl-LDHs.试验结果表明,在α轴方向CaAHLDHs晶粒的生长受到了抑刺,晶粒尺寸从68.34nm减小到34.17nm,c轴方向CaAl-LDHs晶粒的生长几乎没变化,保持在60.76nm左右.使CaAl-LDHs在α轴方向的晶粒生长速率小于c轴方向的晶粒生长速率.这些可能与溶液中PVP特定的立体化学构象以及和CaAl-LDHs的特殊协同作用有关.
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