| 摘要: | 聚二甲基矽氧烷(Polydimethylsiloxane ,PDMS)是一種常見的的矽膠材料。由於其易於製造且具有良好的機械性質、光學透明度、透氧性及化學和生物惰性，使其適合應用於導管、人工血管、隱形眼鏡、人工晶體等接觸人體或植入人體的生醫材料上。但由於PDMS表面的疏水性質，使得蛋白質和其他分子的非特異性吸附限制了其在這些應用上的發展。兩性雙離子材料2-甲基丙烯?氧乙基磷酸??(2-methacryloyloxyethyl phosphorylcholine)具有優良的親水性、生物相容性、潤滑、抗蛋白及細菌吸附能力。本實驗透過將兩性雙離子材料MPC (2-methacryloyloxyethyl phosphorylcholine )與擁有直鏈矽氧烷的mono Methacryloxypropyl terminated polydimethylsiloxane和擁有支鏈矽氧烷mono Methacryloxypropyl functional polydimethylsiloxane分別合成出擁有直鏈與支鏈輸水端的共聚物，用浸塗與噴塗兩種不同的修飾方式沉積在PDMS上，透過共聚物上的疏水鏈段與基材的PDMS之間的疏水作用力將共聚物吸附到表面上，提升PDMS表面的親水性、潤滑性與抗汙性。第一部份我們使用核磁共振光譜儀(Nuclear Magnetic Resonance spectroscopy)對聚合物進行轉化率與化學結構的鑑定，以及測定修飾溶液的黏度與表面張力了解溶液的性質；第二部份透過水接觸角、摩擦力測試檢視浸塗與噴塗兩種不同塗佈方式的親水性、表面潤滑度與耐磨性；第三部份使用原子力顯微鏡與光學顯微鏡對修飾表面形貌進行鑑定；最後部份，特過抗細菌貼附測試檢測修飾層的抗汙性。本研究透過簡單與低毒性的製程將共聚物Poly(MPC-co-MTP)與Poly(MPC-co-MFP)修飾於PDMS表面上，增加其親水性、潤滑、抗汙與生物相容性，期許為來延伸應用於各式矽膠表面修飾。;Polydimethylsiloxane (PDMS) is a silicone material that has excellent elasticity, optical transparency, chemical and biological inertness, permeability to oxygen, and ease of fabrication. Therefore, PDMS has been used for biomedical applications such as catheters, vascular grafts, contact lenses, and intraocular lenses. However, it has some problems in the development of medical applications because the hydrophobic surface of PDMS, leading to non-specific adsorption of protein. Poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) is well known as its hydrophilicity, biocompatibility, lubrication, and anti-protein adsorption. In our study, the zwitterionic copolymers, poly(2-methacryloyloxyethyl phosphorylcholine-co-methacryloxypropyl terminated polydimethylsiloxane (poly(MPC-MTP))and(2-methacryloyloxyethyl phosphorylcholine-co-methacryloxypropyl functional polydimethylsiloxane (poly(MPC-MFP)), were deposited on PDMS by dip coating and spray coating in an ambient environment, and polymers will adsorbed on the surface by hydrophobic interaction between the hydrophobic segment on the copolymer and surface of PDMS to improve its hydrophilicity and antifouling properties. The nuclear magnetic resonance was used to measure the conversion rate and identification of the chemical structure of copolymer. The surface chemical composition and elemental ratios were measured by the X-ray photoelectron spectroscopy (XPS). The surface morphology was measured by atomic force microscope (AFM) and optical microscope. The hydrophilicity was determined by sessile drop water contact angle measurements. The lubrication and, antifouling property were measured by friction test, and bacteria adhesion tests, respectively. We used simple and low toxic process for modification of PDMS by poly(MPC-co-MTP) and poly(MPC-co-MFP) to improve hydrophilicity , lubrication, anti-fouling property, oxygen permeability and biocompatibility. In future work, we will extend to various types of silicone surface modification. |
