| 摘要: | 在熱塑性聚氨酯（TPU）生物材料表面發現了一系列嚴重問題，例如
由於疏水性表面引發凝血?和發炎反應. 因此,將表面修飾為親水性， 進而阻止了蛋白質，血液和細胞的粘附。光接枝法是表面改性的有效方法之一，其中光引髮劑二苯甲酮（BP）被廣泛使用. 然而，光反應單體在乙醇溶劑中的高溶解度使單體從表面被釋放至溶劑中。結果，由於弱的錨固性能，有時會影響預處理的效率。在這項研究中，我們發現丙烯酸苯甲?苯基酯（BPA）的共聚物在醇類中的溶解度低，可以克服二苯甲酮（BP）的釋放問題。在這項研究中，我們合成了由 4-丙烯?氧基二苯甲酮（BPA） 單體作為光起始劑的聚（4-丙烯?氧基二苯甲酮-甲基丙烯酸丁酯） p(BPA-BMA)除此之外, 合成了 p(MPC-DMA), 並起了官能團的作用。 2-甲基丙烯?氧基乙基磷?膽鹼(MPC)由於其優異的生物相容性，超強的親水性和出色的抗沾黏特性而被廣泛應用。 使用 1H NMR 確認 p(BPA-BMA)和 p(MPCDMA)聚合物之結構。 利用 ATR-FTIR， XPS 光譜證實透過使用聚合物 p(BPA-BMA)作為光起始劑的光接枝反應在 TPU 表面上的 p(MPC-DMA)附著。通過動摩擦係數（?K），水表面接觸角（WSCA）證明了有效改善TPU 表面親水性的能力. 通過所有結果， 顯示了 BPA 共聚物通過紫外線照射接枝兩性離子聚合物的能力，也克服了這些單體的缺點. 將來， BPA 共聚物可廣泛應用於各種醫療器械.;A series of serious problems on the surface of thermoplastic polyurethane (TPU) biomaterials were found such as thrombin, inflammation response, and device failure due to the hydrophobicity surface. Therefore, modification of surfaces becomes hydrophilicity, which prevents adhesion of proteins, blood, and cells. Photo-grafting method is one of the efficient methods in surface modification, in which benzophenone (BP) a photo-initiator is used widely. However, the high solubility in alcohol solvents of the photo-reaction monomers causes the monomers are being released out of the surface in alcohol solvents. As a result of this, the efficiency of the pretreatment is occasionally affected due to weak anchoring property. In this study, we found that co-polymers of benzoylphenyl acrylate (BPA) had possessed low solubility in alcohols, which can overcome the releasing problem of benzophenone (BP). In this study, we
synthesized poly(4-benzoylphenyl acrylate-co-butyl methacrylate) P(BPA-BMA) that based a photo-initiator monomer was 4-benzoylphenyl acrylate (BPA).Besides that, poly(2-methacryloyloxyethyl phosphorylcholine-co-dodecyl
methacrylate) P(MPC-DMA) was synthesized and played a role as the function group. 2-methacryloyloxyethyl phosphorylcholine (MPC) has been widely applied due to its excellent biocompatibility, super hydrophilic properties, and excellent anti-biofouling properties. P(BPA-BMA) and P(MPC-DMA) polymer were characterized by 1H NMR. P(MC-DMA) attachment on the TPU surface by
photo-grafting reaction using photo-initiator polymer P(BPA-BMA) was confirmed by ATR-FTIR, XPS spectrum. Through the dynamic friction coefficient (?K) results, water surface contact angle (WSCA) demonstrated the ability to improve the hydrophilicity property of surface TPU efficiently. Moreover, the percentage of the bacterial and protein absorption on the surface was prevented more significantly than the unmodified sample. Through all results, the copolymer of BPA showed the ability to grafting zwitterionic polymers through UV
irradiation, also overcome these monomer drawbacks. BPA copolymer may widely be applied to various medical devices in the future. |
