结晶驱动的结晶性/聚电解质型嵌段共聚物的可控自组装及其区域选择性功能化

项目名称： 结晶驱动的结晶性/聚电解质型嵌段共聚物的可控自组装及其区域选择性功能化

项目编号： No.21274130

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 徐君庭

作者单位： 浙江大学

项目金额： 82万元

中文摘要： 通过"点击"反应合成两大类结晶性/聚电解质型嵌段共聚物: 聚乙烯/聚丙烯酸(PE-b-PAA)和聚乙烯/聚4-乙烯基吡啶(PE-b-P4VP)。考察无机盐浓度和pH值对此类结晶性/聚电解质型嵌段共聚物胶束形态的影响，了解在亲水/憎水作用力、结晶、静电作用力三种作用力协同驱动下嵌段共聚物在溶液中的自组装过程。同时合成结晶/非晶嵌段共聚物聚乙烯/聚氧化乙烯(PE-b-PEO)，以不同结晶性胶束为组装基元(如PE-b-PAA和PE-b-PEO或及PE-b-P4VP和PE-b-PEO)，研究在结晶驱动下，不同种类结晶性胶束之间进一步进行"二次自组装"的条件，探讨"二次自组装"的机理，以期实现结晶性胶束之间的可控自组装。对"二次自组装体"中聚电解质链段进行选择性反应，获得特定区域功能化的嵌段共聚物胶束。本工作对构建具有复杂形状和不同功能区域的嵌段共聚物胶束结构具有重要的理论和实际意义。

中文关键词： 结晶；嵌段共聚物；自组装；；

英文摘要： In this project, two types of crystalline/electrolyte block copolymers, polyethylene-b-poly(acrylic acid) (PE-b-PAA) and polyethylene-b-poly(4-vinyl pyridine) (PE-b-P4VP) will be synthesized via "click" reaction. The effects of inorganic salt and pH on the morphology of crystalline/electrolyte block copolymer micelles will be investigated to disclose the self-assembly mechanism in the presence of three different driving forces: hydrophilic/hydrophobic force, crystallization and static electric force. Moreover, crystalline/amorphous block copolymer polyethylene-b-poly(ethylene oxide) (PE-b-PEO) will be synthesized. Using different semicrystalline micelles as assembly units, for example, PE-b-PAA and PE-b-PEO or PE-b-P4VP and PE-b-PEO, the self-assembly of different semicrystalline micelles into PE-b-PEO/PE-b-PAA/PE-b-PEO or PE-b-PEO/PE-b-P4VP/PE-b-PEO "triblock co-micelles" ("secondary assemblies") driven by crystallization will be also studied. The mechanism of secondary self-assembly will be explored. The semicrystalline "triblock co-micelles" will be regio-selectively functionalized through the reaction between the PAA or P4VP block with gold or CdS nanoparticles. The study of the present project is expected to have an important contribution to construction of block copolymer micelles with complex shapes and d

英文关键词： crystallization；block copolymer；self-assembly；；