發(fā)布時間：2018-08-07 07:18

【摘要】：刺激響應(yīng)性表面可以在外界刺激下改變表面宏觀性質(zhì)（比如潤濕性、粘附性、粗糙度、生物相容性）。不同類型的外界刺激（包括熱、光、pH、電和化學(xué)添加劑等）可以被應(yīng)用到這些表面上。這些刺激中，光可以提供一個清潔、非侵入的、可調(diào)節(jié)的能量輸入，并且具有光化學(xué)反應(yīng)的響應(yīng)時間短的特點，從而引起越來越多的關(guān)注。控制潤濕性可以通過對表面進行化學(xué)修飾從而改變液體對表面的親和力。光控分子開關(guān)對制備潤濕性可控的表面提供了一個新的途徑。關(guān)于光控分子開關(guān)修飾的表面的潤濕性研究中，提出了很多增大偶氮苯/螺吡喃不同構(gòu)型修飾的表面潤濕性差別的方法，比如混合膜、增加表面粗糙度以及使用聚合物修飾的表面。但是，控制平滑表面上的光響應(yīng)自組裝單層膜的潤濕性仍然是個挑戰(zhàn)。 剛性二苯乙烯是一個光響應(yīng)基團，具有熱穩(wěn)定性好、異構(gòu)體構(gòu)型差異大、平面性好等特點。基于剛性二苯乙烯的光響應(yīng)性我們設(shè)計合成了分子S5，順式和反式S5自組裝單層膜水接觸角分別為67.8°和66.3°，差別很小。為了增大順式和反式剛性二苯乙烯衍生物自組裝單層膜潤濕性的差別，在S5的基礎(chǔ)上接上脲基乙酸，合成分子S7。順式和反式S7自組裝單層膜水接觸角分別為63.8°和56.4°，差值為7.4°，我們得到了在不同構(gòu)型下潤濕性不同的自組裝單層膜。其中，順式S7自組裝單層膜經(jīng)光照后水接觸角無明顯變化，可能是因為S7沒有足夠大的空間發(fā)生異構(gòu)。為了減小空間阻礙，，制備了順式S7/正丁硫醇混合自組裝單層膜，水接觸角為70.8°。經(jīng)392nm光照后，水接觸角減小到60.4°；再經(jīng)過352nm光照后，水接觸角與352nm光照前相比無明顯變化，因此，順式S7/正丁硫醇混合自組裝單層膜是一個具有單向光響應(yīng)性的薄膜。
[Abstract]:Stimulative responsive surfaces can change the macroscopic properties of surfaces under external stimulation (e. G. Wettability, adhesion, roughness, biocompatibility). Different types of external stimuli (including heat, light pH, electrical and chemical additives, etc.) can be applied to these surfaces. Among these stimuli, light can provide a clean, non-invasive, adjustable energy input, and has the characteristics of short response time of photochemical reaction, which has attracted more and more attention. Controlling wettability can change the affinity of liquid to the surface by modifying the surface chemically. Optically controlled molecular switches provide a new way to prepare wettability controllable surfaces. In the study of the wettability of the surface modified by optically controlled molecular switches, many methods have been proposed to increase the wettability of the surface modified by azobenzene / spiropyran, such as the mixed film. Increase surface roughness and use polymer modified surfaces. However, controlling the wettability of self-assembled monolayers on smooth surfaces remains a challenge. Rigid stilbene is a photo-responsive group with good thermal stability, great difference in the configuration of isomers and good planarity. Based on the photoresponse of rigid stilbene, the water contact angles of S5, cis-and trans-S5 self-assembled monolayers were 67.8 擄and 66.3 擄, respectively. In order to increase the wettability of self-assembled monolayers of cis and trans rigid stilbene derivatives, the synthesis molecule S7 was synthesized by adding urea acetic acid on the basis of S5. The water contact angles of cis-and trans-S7 self-assembled monolayers are 63.8 擄and 56.4 擄, respectively, and the difference is 7.4 擄. We have obtained self-assembled monolayers with different wettability under different configurations. The water contact angle of Cis-S7 self-assembled monolayer film does not change obviously after illumination, which may be due to the isomerism of S7. In order to reduce the space barrier, a cis S7 / n-butyl mercaptan mixed self-assembled monolayer was prepared with a water contact angle of 70.8 擄. After 392nm illumination, the water contact angle decreased to 60.4 擄, and after 352nm illumination, the water contact angle did not change significantly compared with that before 352nm illumination. Therefore, the cis-S _ 7 / n-butyl mercaptan mixed self-assembled monolayer was a unidirectional photo-responsive film.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：O625.12;TB383.2

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