RAFT分散聚合制备离子液体聚合物纳米颗粒

Preparation of nanoparticles poly ionic liquid via RAFT dispersion polymerization of ionic liquid monomer

高分子纳米颗粒在生物、医药和催化等领域具有良好的应用前景.聚合诱导自组装能够高效制备不同形貌的纳米颗粒.离子液体具有许多独特的性质,在许多领域具有广泛的应用.利用离子液体[MTMA][TFSA]作为可逆加成-断裂链转移(reversible additionfragmentation chain transfer, RAFT)分散聚合的单体,以PDMAEMA46作为大分子链转移剂,在乙醇溶液中进行聚合诱导自组装,制备出二嵌段共聚物纳米颗粒.随着第二嵌段的聚合度增加,颗粒的尺寸基本呈增大的趋势.

Polymer nanoparticles have applications in biology,pharmacy,catalyst,etc. Polymerization-induced self-assembly is highly efficient for the synthesis of nanoparticles with different morphologies.Since ionic liquids have many unique properties,they have found wide applications such as catalysis,nanotechnology and biotechnology.Ionic liquid [MTMA][TFSA] as a monomer is used for reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization in ethanol,and PDMAEMA46 as a macromolecular chain transfer agent to self-assembly to prepare diblock copolymer nanoparticles.As the degree of polymerization of the second block increases,the size of particles tends to increase substantially.