Improved Hydrophobicity of a Bacterial Cellulose Surface: Click Chemistry in Action,ACS Biomaterials Science & Engineering

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Improved Hydrophobicity of a Bacterial Cellulose Surface: Click Chemistry in Action
ACS Biomaterials Science & Engineering ( IF 5.4 ) Pub Date : 2020-01-28 , DOI: 10.1021/acsbiomaterials.9b01571
Munusamy Krishnamurthy _{1,

2} , Nitin Prakash Lobo _{2,

3} , Debasis Samanta _{1,

2}

Affiliation

The vast application potentials of bacterial cellulose (BC)-based materials for developing leather-like materials, wound-healing materials and electronic materials have been realized very recently. Surface functionalization of these materials can help in improvement of certain properties such as water repellency, mechanical strength, and so forth. In this paper, we reported functionalization of BC surfaces using “click” polymerization for the first time. By this methodology, dense aromatic groups have been incorporated for the improvement of hydrophobicity. For comparative studies, various fluorine-based compounds have been introduced using conventional click reactions. The surface-modified BC materials have been confirmed by various spectroscopic methods. Particularly, the chemical structures of the materials were studied by solid-state ¹³C NMR spectroscopy and attenuated total reflection–infrared spectroscopy. X-ray photoelectron spectroscopy was used to study the elemental composition of the materials. Moreover, the crystallite changes of modified BC surfaces were investigated by X-ray diffraction. Further, the changes in the morphology of the material after functionalization were evaluated by scanning electron microscopy and atomic force microscopy. Finally, water contact angle measurement revealed manyfold increase in hydrophobicity after click polymerization. A video is also provided in the Supporting Information to show the application potential of this material for developing leather-like materials.

中文翻译：

改善细菌纤维素表面的疏水性：点击化学作用

细菌纤维素（BC）基材料在开发皮革样材料，伤口愈合材料和电子材料方面具有广阔的应用潜力。这些材料的表面功能化可以帮助改善某些特性，例如疏水性，机械强度等。在本文中，我们首次报道了使用“点击”聚合的BC表面功能化。通过这种方法，稠密的芳族基团被引入以改善疏水性。为了进行比较研究，已经使用常规点击反应引入了多种基于氟的化合物。表面改性的BC材料已经通过各种光谱学方法得到证实。特别地，通过固态研究了材料的化学结构¹³ C NMR光谱和衰减全反射红外光谱。X射线光电子能谱被用来研究材料的元素组成。此外，通过X射线衍射研究了改性BC表面的微晶变化。此外，通过扫描电子显微镜和原子力显微镜评价功能化后材料的形态变化。最后，水接触角的测量表明，点击聚合后疏水性增加了许多倍。支持信息中还提供了一个视频，以显示该材料在开发类似皮革的材料中的应用潜力。

更新日期：2020-01-29

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