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摘要：层状氢氧化物属于水滑石类化合物，是具有阴离子插层的层状化合物，英文名称为：Layered Double Hydroxides)，由两种金属的氢氧化物形成的层状复合金属氢氧化物，一般经过插层组装过程、插入一定量或某一类的离子得到的系列材料统称为层状氢氧化物（LDHs)。二十世纪末期，越来越先进的现代分析技术和测试手段成就了一系列LDHs，对其层状结构、性质了解不断加深，使LDHs的研究得到重视，迅速发展，随着进一步深化，近年来LDHs杂化物层状晶体结构的可塑性被充分揭示，超分子化学研究对层状氢氧化物有着重要意义，对插层组装研究为LDHs层状领域提供了理论指导，并有了一定的研究成果。70093
本论文分别通过煅烧重铸法和共沉淀法结合合成制备了维生素C、海藻酸根-LDHs的杂化结构，通过红外、紫外吸收、XRD等表征手段对其杂化物结构、晶体等进行分析，研究合成条件、阴离子浓度及组装过程对杂化物结构影响，研究工作内容如下：
第一部分：通过共沉淀法成功制备碳酸根插层层状氢氧化物，通过XRD确定其结构特征为典型碳酸根插层LDHs，将CO32--LDHs在450 ℃下煅烧4个小时，通过计算论证得到产物为LDO。第二部分：将LDO在40 ℃密封条件下，维生素C阴离子溶液中还原，通过计算、表征确定维生素C成功插层成功，控制温度和LDO量不变的情况下改变维生素C阴离子浓度，发现在阴离子一定浓度范围内，阴离子浓度越高插层越完全。第三部分：制备维生素C、海藻钠同时插层LDHs，分析结果表明维生素C、海藻钠成功插入层间。
本论文分别成功制备了药物插层LDHs杂化物，探索了煅烧重铸法阴离子浓度对插层速率的影响。本论文的研究结果为LDHs组装过程、设计提供了一定依据，并且给后来研发着提供有益借鉴。
毕业论文关键词：层状双氢氧化物，维生素C,海藻酸钠，控释释放
Preparation and characterization of anionic intercalated layered hydroxides (LDH)
Abstract:Layered Hydroxides, Hydrotalcite Compounds belonging to the anionic layered compounds, layered composite metal hydroxides formed from the hydroxides of two metals, are generally referred to as intercalated and inserted into certain The ion-derived series of materials is collectively referred to as hydrotalcite-based intercalation materials (LDHs). In the late twentieth century, more and more advanced modern analytical techniques and test methods have deepened the understanding of LDHs layered structure, promoted the rapid development of LDHs research, LDHs structure and performance research has also been further deepened, in recent years LDHs layered The plasticity of the crystal structure is fully revealed, the supramolecular chemistry and intercalation assembly studies for LDHs layered precursor preparation, structural characterization, supramolecular model structure establishment, intercalation assembly dynamics and mechanism, intercalation assembly functional development and other fields Provides theoretical guidance and has some research results.
In this paper, two new hybrid structures based on LDHs were prepared by calcination recasting method and coprecipitation method. The hybrid structure, crystal and so on were analyzed by IR, UV absorption and XRD. Conditions, anion concentration and the impact of the assembly process on the structure of the hybrid, the research work is as follows:
In the first part, the carbonate is intercalated by the coprecipitation method. The structural characteristics of the carbonate carbonate intercalation LDHs are determined by rxd. The CO32--LDHs are calcined at 450 ℃ for 4 hours. The product is LDO. The second part: the LDO in 40 ℃ sealed under the conditions of vitamin C anion solution reduction, by calculation, characterization to determine the success of vitamin C intercalation, to determine the temperature and LDO amount of vitamin C anions to change the concentration of anions within a certain concentration range, The higher the anion concentration, the more complete the intercalation. The results showed that vitamin C and seaweed sodium were successfully inserted into the interlayer. The results showed that Vitamin C and seaweed sodium were intercalated.