物理化学学报Issue(2)：335-340,6.DOI:10.3866/PKU.WHXB201211145
共溶剂性质对双亲性无规共聚物P（St-co-DM）胶束化行为及其性能的影响
Influence of Common Solvents on Micellization Behavior and Properties of the Amphiphilic Random Copolymer P(St-co-DM)
摘要
Abstract
Styrene monomer (St) and dimethylaminoethyl methacrylate monomer (DMAEMA) were used to synthesize the amphiphilic random copolymer P(St-co-DM) via free radical copolymerization. The polymer structure was characterized by Fourier transform infrared (FTIR) spectroscopy, 1H nuclear magnetic resonance (1H NMR) spectroscopy, gel permeation in chromatography (GPC), and differential scanning calorimetry (DSC). We investigated the influence on the microstructure of the P(St-co-DM) nanoscale micel es by self-assembly in three common solvents (co-solvent), and also investigated the effect of micel e structure on the emulsion properties. The morphologies and size distributions of the P(St-co-DM) col oid particles were studied by transmission electron microscopy (TEM) and dynamic light scattering (DLS). The results show that the more critical water content, the higher hydrophilic and the bigger hydrodynamic radius of the micel es are observed when tetrahydrofuran (THF) is used as co-solvent. When dioxane or THF is used as co-solvent, the P(St-co-DM) self-assembles into spherical micel es with a relatively loose outer layer and a compact inner layer. In the case of N,N-dimethylformamide (DMF), particles are distributed uniformly inside the spherical micel es. The hydrophilic properties of the micel es were characterized by recording the contact angle for the toluene/water interface. The contact angles of al the micel es are less than 90° . The O/W type (oil-in-water type) emulsions were obtained for three co-solvents. The type of emulsions was determined by drop test. The emulsifier experiment shows that the solid particulate emulsifiers have excel ent emulsifying properties for dioxane and THF as co-solvents.关键词
双亲共聚物/共溶剂/自组装/胶束/乳化Key words
Amphiphilic copolymer/Common solvent/Self-assembly/Micel e/Emulsification分类
化学化工引用本文复制引用
陈美玲,陈姗姗,易成林,汪理想,耿志鑫,刘晓亚..共溶剂性质对双亲性无规共聚物P（St-co-DM）胶束化行为及其性能的影响[J].物理化学学报,2013,(2):335-340,6.基金项目
The project was supported by the National Natural Science Foundation of China (20974041) and Fundamental Research Funds for the Central Universities, China (JUSRP211A11).@@@@国家自然科学基金(20974041)和中央高校基本科研项目(JUSRP211A11)资助 （20974041）
