轉印技術滾輪材料之聚二甲基矽氧烷表面接枝聚乙二醇單甲醚的親水性改質

Hydrophilic Modification of Poly (dimethyl siloxane) by Grafting Poly(ethylene glycol) methyl ether on The Surface Material of contact printing Roller

余若綺(RUO-CHI YU)

指導教授 ： 蔣見超

國立中正大學/工學院/化學工程學系/碩士(2014年)

摘要

本實驗目的是要做出表面具有親水性的滾輪印刷材料，首先利用Sol-gel reaction將製做出的交聯劑與雙邊有氫氧基的聚二甲基矽氧烷 (PDMS)反應，形成交聯的PDMS，再將裁切好的PDMS薄片與異氰酸酯反應，PDMS薄片表面氫氧基會與異氰酸酯產生加成反應，形成氨基甲酸酯(urethane)，再利用聚乙二醇單甲醚(MPEG)尾端的氫氧基與剩餘未反應的異氰酸酯反應，最後可將親水性MPEG接枝在PDMS薄片表面。
利用FTIR的鑑定，吸收峰出現在3330cm-1，此峰代表氨基甲酸酯已產生，證明異氰酸酯成功與PDMS反應，代表未反應之異氰酸酯吸收峰2270cm-1消失，證明MPEG已成功接枝在PDMS薄片表面，並利用接觸角測試，證明成功改善了親水性，其中接觸角最多可從約104ﾟ下降至68∘，並且利用AFM進行表面分析，利用DSC、TGA進行熱性質分析。

關鍵字

MPEG ； 交聯 ； PDMS ； 接枝

並列摘要

The purpose of the experiment is to enhance the hydrophilicity of the roller material for contact printing. First, the crosslinking agent was reacted with the hydroxyl terminated Poly (dimethylsiloxane) (PDMS) via Sol-gel reaction, to form crosslinked PDMS. This crosslinked PDMS was then cutted into sheets, and reacted with diisocyanate. Addition reaction between diisocyanate and the hydroxyl groups on the surface of PDMS sheet led to the formation of urethane group. Afterwards the hydroxyl group on the poly (ethylene glycol) methyl ether (MPEG ) was reacted with the remaining unreacted isocyanate, and grafted on the surface of PDMS sheet.
According to the FTIR analysis, the appearance of the absorption peak at 3330cm-1, assigned to -NHCOO-from the urethane group, indicate that the PDMS sheet was reacted with diisocyanate successfully, and the disappearance of the absorption peak at 2270cm-1 corrobates that the MPEG was grafted on the surface of PDMS sheet successfully. The contact angle of modified samples was smaller, thus indicating that the hydrophilic modification was successful. Surface analysis by AFM and thermal analysis by DSC and TGA have also been conducted.

並列關鍵字

MPEG ； crosslinking ； PDMS ； graft

參考文獻

[1] Kumar, A., & Whitesides, G. M. (1993). Features of gold having micrometer to centimeter dimensions can be formed through a combination of stamping with an elastomeric stamp and an alkanethiol ‘‘ink’’followed by chemical etching.Applied Physics Letters, 63(14), 2002-2004.

[3] Love, J. C., Estroff, L. A., Kriebel, J. K., Nuzzo, R. G., & Whitesides, G. M. (2005). Self-assembled monolayers of thiolates on metals as a form of nanotechnology. Chemical reviews, 105(4), 1103-1170.

[4] Ulman, A. (1996). Formation and structure of self-assembled monolayers.Chemical reviews, 96(4), 1533-1554.

[5] Tarlov, M. J., & Newman, J. G. (1992). Static secondary ion mass spectrometry of self-assembled alkanethiol monolayers on gold. Langmuir, 8(5), 1398-1405.

[6] Winger, B. E., Julian Jr, R. K., Cooks, R. G., & Chidsey, C. E. D. (1991). Surface reactions and surface-induced dissociation of polyatomic ions at self-assembled organic monolayer surfaces. Journal of the American Chemical Society, 113(23), 8967-8969.