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,目錄摘要Ⅰa abstractⅡ1、引言12、實(shí)驗(yàn)部分42.1實(shí)驗(yàn)儀器和試劑42.2實(shí)驗(yàn)步驟52.2.1 試劑處理方法52.2.2 聚四氟乙烯膜接枝的處理過程62.2.3 表征方法73、結(jié)果與討論93.1ptfe膜表面的接觸角變化93.2ptfe表面atr ft-ir紅外分析.......
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聚四氟乙烯膜表面接枝聚乙烯基吡啶研究
目錄
摘要 Ⅰ
A Abstract Ⅱ
1、引言 1
2、實(shí)驗(yàn)部分 4
2.1 實(shí)驗(yàn)儀器和試劑 4
2.2 實(shí)驗(yàn)步驟 5
2.2.1 試劑處理方法 5
2.2.2 聚四氟乙烯膜接枝的處理過程 6
2.2.3 表征方法 7
3、結(jié)果與討論 9
3.1 PTFE膜表面的接觸角變化 9
3.2 PTFE表面ATR FT-IR紅外分析....................................13
4、結(jié)論....................................................................14
參考文獻(xiàn)...................................................................15
致謝 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-鈉腐蝕液中，脫去表層的氟而獲得表面羥基，然后4,4'-偶氮基-雙-(4-異氰基異戊酸)與表面羥基偶聯(lián)反應(yīng)獲得聚合所需要的表面引發(fā)基團(tuán),再利用表面自由基聚合方法在修飾后的PTFE薄膜表面接枝聚乙烯基吡啶（P4VP）。接枝功能化的PTFE膜的化學(xué)組成和形態(tài)用衰減全反射傅立葉紅外光譜（ATR FT-IR）進(jìn)行表征；利用接觸角測量儀測量潤濕角,表征親水性,結(jié)果顯示表面接枝PVP后的PTFE膜接觸角明顯降低,由憎水變?yōu)橛H水,聚合物刷和PTFE膜的共價(jià)連接賦予了含氟聚合物許多新性能。
關(guān)鍵詞: 聚四氟乙烯; 自由基聚合; 表面處理; 接觸角
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
目錄
摘要 Ⅰ
A Abstract Ⅱ
1、引言 1
2、實(shí)驗(yàn)部分 4
2.1 實(shí)驗(yàn)儀器和試劑 4
2.2 實(shí)驗(yàn)步驟 5
2.2.1 試劑處理方法 5
2.2.2 聚四氟乙烯膜接枝的處理過程 6
2.2.3 表征方法 7
3、結(jié)果與討論 9
3.1 PTFE膜表面的接觸角變化 9
3.2 PTFE表面ATR FT-IR紅外分析....................................13
4、結(jié)論....................................................................14
參考文獻(xiàn)...................................................................15
致謝 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-鈉腐蝕液中，脫去表層的氟而獲得表面羥基，然后4,4'-偶氮基-雙-(4-異氰基異戊酸)與表面羥基偶聯(lián)反應(yīng)獲得聚合所需要的表面引發(fā)基團(tuán),再利用表面自由基聚合方法在修飾后的PTFE薄膜表面接枝聚乙烯基吡啶（P4VP）。接枝功能化的PTFE膜的化學(xué)組成和形態(tài)用衰減全反射傅立葉紅外光譜（ATR FT-IR）進(jìn)行表征；利用接觸角測量儀測量潤濕角,表征親水性,結(jié)果顯示表面接枝PVP后的PTFE膜接觸角明顯降低,由憎水變?yōu)橛H水,聚合物刷和PTFE膜的共價(jià)連接賦予了含氟聚合物許多新性能。
關(guān)鍵詞: 聚四氟乙烯; 自由基聚合; 表面處理; 接觸角
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
