聚四氟乙烯膜表面接枝聚乙烯基吡啶研究.doc
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聚四氟乙烯膜表面接枝聚乙烯基吡啶研究,目录摘要Ⅰa abstractⅡ1、引言12、实验部分42.1实验仪器和试剂42.2实验步骤52.2.1 试剂处理方法52.2.2 聚四氟乙烯膜接枝的处理过程62.2.3 表征方法73、结果与讨论93.1ptfe膜表面的接触角变化93.2ptfe表面atr ft-ir红外分析.......
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聚四氟乙烯膜表面接枝聚乙烯基吡啶研究
目录
摘要 Ⅰ
A Abstract Ⅱ
1、引言 1
2、实验部分 4
2.1 实验仪器和试剂 4
2.2 实验步骤 5
2.2.1 试剂处理方法 5
2.2.2 聚四氟乙烯膜接枝的处理过程 6
2.2.3 表征方法 7
3、结果与讨论 9
3.1 PTFE膜表面的接触角变化 9
3.2 PTFE表面ATR FT-IR红外分析....................................13
4、结论....................................................................14
参考文献...................................................................15
致谢 16
聚四氟乙烯膜表面接枝聚乙烯基吡啶研究
摘要
聚四氟乙烯（PTFE）薄膜暴露于萘-钠腐蚀液中，脱去表层的氟而获得表面羟基，然后4,4'-偶氮基-双-(4-异氰基异戊酸)与表面羟基偶联反应获得聚合所需要的表面引发基团,再利用表面自由基聚合方法在修饰后的PTFE薄膜表面接枝聚乙烯基吡啶（P4VP）。接枝功能化的PTFE膜的化学组成和形态用衰减全反射傅立叶红外光谱（ATR FT-IR）进行表征；利用接触角测量仪测量润湿角,表征亲水性,结果显示表面接枝PVP后的PTFE膜接触角明显降低,由憎水变为亲水,聚合物刷和PTFE膜的共价连接赋予了含氟聚合物许多新性能。
关键词: 聚四氟乙烯; 自由基聚合; 表面处理; 接触角
Preparing Polymer Brushes of Polytetrafluoroethylene Films
Abstract
Films of polytetrafluoroethylene (PTFE) were exposed to sodium naphthalenide (Na/naphtha) etchant so as to defluorinate the surface for obtaining hydroxyl functionality. Surface-initiators were immobilized on the PTFE films by esterification of 4,4'-azobis(4-cyanopentanoic acid) (ACP) and the hydroxyl groups covalently linked to the surface. Grafting of polymer brushes on the PTFE films was carried out by the surface-initiated free radical polymerization. Homopolymers brushes of 4-vinylpyridine (4VP) were prepared by free radical polymerization from the azo-functionalized PTFE surface. The chemical composition and topography of the graft-functionalized PTFE surfaces were characterized by ATR FT-IR and atomic force microscopy (AFM). Water contact angles on PTFE films were reduced by surface grafting of 4VP.
Keywords: Polyterafluoroethylene; Free radical polymerization; Contact angle
目录
摘要 Ⅰ
A Abstract Ⅱ
1、引言 1
2、实验部分 4
2.1 实验仪器和试剂 4
2.2 实验步骤 5
2.2.1 试剂处理方法 5
2.2.2 聚四氟乙烯膜接枝的处理过程 6
2.2.3 表征方法 7
3、结果与讨论 9
3.1 PTFE膜表面的接触角变化 9
3.2 PTFE表面ATR FT-IR红外分析....................................13
4、结论....................................................................14
参考文献...................................................................15
致谢 16
聚四氟乙烯膜表面接枝聚乙烯基吡啶研究
摘要
聚四氟乙烯（PTFE）薄膜暴露于萘-钠腐蚀液中，脱去表层的氟而获得表面羟基，然后4,4'-偶氮基-双-(4-异氰基异戊酸)与表面羟基偶联反应获得聚合所需要的表面引发基团,再利用表面自由基聚合方法在修饰后的PTFE薄膜表面接枝聚乙烯基吡啶（P4VP）。接枝功能化的PTFE膜的化学组成和形态用衰减全反射傅立叶红外光谱（ATR FT-IR）进行表征；利用接触角测量仪测量润湿角,表征亲水性,结果显示表面接枝PVP后的PTFE膜接触角明显降低,由憎水变为亲水,聚合物刷和PTFE膜的共价连接赋予了含氟聚合物许多新性能。
关键词: 聚四氟乙烯; 自由基聚合; 表面处理; 接触角
Preparing Polymer Brushes of Polytetrafluoroethylene Films
Abstract
Films of polytetrafluoroethylene (PTFE) were exposed to sodium naphthalenide (Na/naphtha) etchant so as to defluorinate the surface for obtaining hydroxyl functionality. Surface-initiators were immobilized on the PTFE films by esterification of 4,4'-azobis(4-cyanopentanoic acid) (ACP) and the hydroxyl groups covalently linked to the surface. Grafting of polymer brushes on the PTFE films was carried out by the surface-initiated free radical polymerization. Homopolymers brushes of 4-vinylpyridine (4VP) were prepared by free radical polymerization from the azo-functionalized PTFE surface. The chemical composition and topography of the graft-functionalized PTFE surfaces were characterized by ATR FT-IR and atomic force microscopy (AFM). Water contact angles on PTFE films were reduced by surface grafting of 4VP.
Keywords: Polyterafluoroethylene; Free radical polymerization; Contact angle
