中文摘要：

以钙铝水滑石[Ca2Al（LDH）]为主体,维生素C[VC（C6H8O6）]为客体,采用共沉淀法将VC插层到LDH层间合成了新型VC-无机复合材料{Ca2Al（OH）6[（C6H7O6）0.82（NO3）0.18]·1.7H2O（简称Ca2Al-VC）},其结构和缓释性能经UV-Vis,FT-IR,元素分析,XRD,ICP和TG-DTG表征.研究结果表明,Ca2Al-VC晶型完整,晶相单一,层间距14.6 （A）.VC阴离子双层交替垂直于上下层板,插入量为82％;插入到LDH层间的VC热稳定性得到了明显提高,大部分VC的分解发生在442℃附近;VC在高浓度（0.1 mol·L-1）的Na2SO4溶液中释放速度及释放量高于低浓度（0.01 mol·L-1）的Na2SO4溶液;在去离子水中的释放主要靠离子的扩散.

英文摘要：

A novel intercalated material { Ca2Al（OH）6 [（C6H7O6） 0.82 （NO3） 0.18] · 1.7 H2O （Ca2AlVC） } was synthesized by intercalation of Vitamin C[VC（C6H8O6）] into Ca/Al layered double hydroxide [Ca2Al（LDH）] by the co-precipitation method.The strcuture and release properties were characterized by UV-Vis,FT-IR,elemental analysis,XRD,ICP and TG-DTG.The results showed that the interlayer space of Ca2Al-VC is expanded to 14.6 （A）.VC anion was intercalated into LDH,and was vertical to the brucite-layers in the interdigitated bilayer formation.The amount of VC intercalation is 82%.VC in the intercalated material has better thermal stability in contrast to NaVC and decomposition temperature was about 442 ℃.The release results of VC in deionized water and sodium sulfate with different concentrations show that the quantity of released VC is decided by the diffusion and anions concentration （SO42-）.