磁性纳米复合材料的合成与性能研究-应用化学专业毕业论文.docx

摘 要
磁性材料与多孔材料都具有优良的性质。本文针对磁性材料与多孔材料的合成方法做了深入研究,并且对磁性复合材料进行合成分析。具体研究内容主要包括以下几方面:
1. 采用水热法合成了四氧化三铁纳米粒子,并且在水热体系中研究了表面活性剂 PAM 的剂量对磁性产物尺寸和形貌的影响。结果表明当表面活性剂 PAM 达到一定剂量时会促进四氧化三铁纳米粒子的自生长形成一种新型的中空囊状结构,表现出更强的饱和磁化强度;
2. 采用水热法和溶剂热法分别合成了多孔二氧化硅微球和中空多孔二氧化硅微球。测试结果表明:两种样品都是非定形态 SiO2,属于介孔固体材料,具有较好的吸附、脱附效果。而中空二氧化硅微球中心有大空隙,在药物装载、试剂存储、纳米化学方面有潜在应用;
3. 制备了磁性复合材料 ******@SiO2,并且对 Fe3O4 形成过程进行了深入讨论。结果表明:样品 ******@SiO2 的尺寸约为 260 nm,SiO2 涂层比较均匀,厚度为 20 nm, 这种结构不仅保留了磁性材料的超顺磁性,而且还具备了多孔材料的多种性能。
关键词:磁性复合材料 水热法 溶剂热法 多孔材料
ABSTRACT
The ic materials and porous materials have excellent character. the synthetic methods of ic and porous materials were studied in-depth in this thesis, and synthesized the posite materials. The concrete research content mainly includes the following aspects:
Ferroferric oxide nanoparticles were synthesized by hydrothermal method, and studied the effect of the surfactant PAM’s dose to the size and morphology of the ic nanoparticles. The results show that when the PAM’s dose can promote the growth of ferroferric oxide nanoparticles to form a new type of hollow cystic structure, and showed stronger saturation ization.
Porous silica microspheres and hollow porous silica microspheres were synthesized using the hydrothermal method and the solvothermal method respectively. The test results show that the two kinds of samples are the unsteady form SiO2, belong to the mesoporous solid materials, and have good adsorption, stripping effect. Hollow silica microspheres have big gap in center, and has a potential application in terms of drug loading, reagent storage and nanochemistry.
The posite materials ******@SiO2 were prepared, and the formation of Fe3O4 was discussed further. Results show that the sample size of ******@SiO2 is about 260 nm, and the thickness of SiO2 coating is 20 nm. This structure not only retained the ism of ic material, but also had a variety of porous materials performance.
Key words: posite hydrothermal method solvothermal method porous materials
目 录
摘 要.