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智能微胶囊的制备与性能测试

时间:2020-04-28 20:58来源:毕业论文
金纳米颗粒负载在PNIPAM微凝胶上,形成温敏性复合微凝胶。利用粒径测试仪、紫外光谱仪、高分辨透射电镜

摘要:金纳米粒子由于具有量子尺寸效应和表面效应,所以与宏观的块状金相比有不同的催化性能、电学性能和光学性能。正是由于其特有的表面效应,金纳米粒子的表面能很高,极易发生聚集,因此需要将其表面改性或负载在特定的载体中。本课题首先采用乳液法制备PNIPAM微凝胶,优化其制备条件;将金纳米颗粒负载在PNIPAM微凝胶上,形成温敏性复合微凝胶。利用粒径测试仪、紫外光谱仪、高分辨透射电镜、热重分析仪对复合微凝胶的形态结构、载金颗粒的含量以及复合微凝胶的温敏性进行表征。结果表明,当交联剂为7%、种子溶液为3mL、无机前驱体为30mL、银溶液为40mL时,复合微凝胶的包覆率最高,且分散均匀。58297

毕业论文关键词:金属纳米粒子;智能微凝胶;制备;性能

Preparation and capability test of intelligent microcapsules

Abstract: Due to the quantum size effect and surface effect, gold nanoparticles have different catalytic properties, electrical properties and optical properties. Because of its special surface effect, the surface of gold nanoparticles can be very high; it is very easy to be assembled, so it is needed to modify the surface of the gold nanoparticles. In this paper, PNIPAM micro gels were prepared by emulsion method, and the preparation conditions were optimized. The gold nanoparticles were loaded on the PNIPAM micro gels to form temperature sensitive composite micro gels. The morphology and structure of the composite micro gels, the content of the gold particles and the temperature sensitivity of the composite were characterized by the diameter measuring instrument, the ultraviolet spectrometer, the high resolution transmission electron microscope and the thermal gravimetric analyzer. The results showed that when the crosslinking agent was 7%, the seed solution was 3mL, the inorganic precursor was 30mL, and the silver solution was 40mL, the coating rate of the composite was the highest, and the dispersion was uniform.

Key words: gold nanoparticles;intelligent microcapsules;preparation;properties

目  录

1 文献综述 1

1.1 香料香精与微凝胶 1

1.2 智能微凝胶简况 1

1.3 金纳米粒子负载微凝胶简况 1

1.4 PNIPAM负载金的制备 2

1.4.1 直接分散法(共混法) 2

1.4.2 聚合物基底原位聚合法 2

1.4.3 原位合成AuNPs法 2

1.4.4 其他方法 2

1.5 载金纳米粒子温度刺激响应性复合微凝胶的应用 3

1.5.1 药物输送与可控释放 3

1.5.2 表面增强拉曼散射 3

1.5.3 催化领域 3

1.5.4 纳米开关阀 3

1.6 本课题的研究目的和意义 4

2 实验部分 5

2.1 实验材料 5

2.1.1 实验材料和试剂 5

2.1.2 主要仪器和设备 5

2.2 微凝胶的制备 5

2.3 金纳米粒负载微凝胶的制备 6

2.4 微凝胶制备的单因素实验 6

2.4.1 交联剂用量的影响 6 智能微胶囊的制备与性能测试:/huaxue/lunwen_50724.html

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