Photocurable Urushiol Analogues Bearing Methacryloxy-Containing Side chains
Photocurable Urushiol Analogues Bearing Methacryloxy-Containing Side chains
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DOI：
10.1021/acs.langmuir.9b00230
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发表时间：
2019-04-02
期刊：
影响因子：
3.9
通讯作者：
Yoshida, Masaru
中科院分区：
文献类型：
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作者：
Watanabe, Hirohmi;Takahashi, Mariko;Yoshida, Masaru
以丁香油中的一种成分丁香酚为原料合成了光固化漆酚类似物。以2，2-二甲氧基-2-苯基苯乙酮为光引发剂，在侧链末端带有甲基丙烯酰氧基的漆酚类似物制备的膜中发生了光引发自由基聚合。通过光照射前后的膜的红外光谱测量证实了成功的聚合。应变引起的弹性屈曲不稳定性的机械测量测试表明，杨氏模量的光照射的样品是4-5倍，高于没有光照射的薄膜。这归因于通过甲基丙烯酸部分的聚合和邻苯二酚部分的氧化聚合形成高度交联的结构。还使用光掩模对在基板上制备的膜进行光致表面纹理化。显影后，通过在环己酮中浸泡几分钟，成功地获得了负色调图案。这种图案化表面的制备是特别相关的，因为所获得的表面可以作为细胞粘附、蛋白质固定和具有空间布置的其他化学品的固定的支架。
Photocurable urushiol analogues were synthesized using eugenol (an ingredient of clove oil) as the starting material. Photo-induced radical polymerization with 2,2-dimethoxy-2-phenylacetophenone as a photo-initiator took place in the film prepared from the urushiol analogue-bearing methacryloxy groups at the ends of their side chains. Successful polymerization was confirmed by infrared spectroscopy measurements of the film before and after photo irradiation. Strain-induced elastic buckling instability for mechanical measurement tests revealed that the Young's moduli of the photo-irradiated samples were 4-5 times higher than the films without photo-irradiation. This was attributed to the formation of a highly cross-linked structure through polymerization of the methacrylic moieties and oxidative polymerization of the catechol moieties. Photo-induced surface texturing was also performed for the films prepared on a substrate using a photomask. Negative-tone patterns were successfully obtained after development by soaking in cyclohexanone over several minutes. The preparation of such patterned surfaces was of particular relevance as the obtained surface can serve as a scaffold for cell adhesion, protein immobilization, and the immobilization of other chemicals with spatial disposition.