Key Laboratory of Green Pesticide and Agricultural Bioengineering, Guizhou University, 550025, Guiyang, China.
ERNAM - Erciyes University Nanotechnology Application and Research Center, 38039, Kayseri, Turkey; Department of Materials Science and Engineering, Erciyes University, Kayseri, 38039, Turkey.
Carbohydr Polym. 2021 Jun 15;262:117909. doi: 10.1016/j.carbpol.2021.117909. Epub 2021 Mar 5.
Commercially available types of chitin or chitin isolate are usually in powder form and are nanofibrous in microstructure. However, the surface characteristics of natural chitin in the body of insects are currently understudied. Herein, natural chitin film was successfully produced from bio-waste of insect pupae of the Japanese giant silkworm. Two different surface morphologies of the chitin film were observed. We report for the first time a micropapillary surface structure of chitin which was observed on the dorsal side of the film. To further potential of the micropapillary structured natural chitin in sensing applications, we develop a protocol for generating a nanoscopic film of Ag using thermal evaporation. The Ag-deposited natural chitin films exhibited surface-enhanced Raman scattering (SERS) activity to an extent depending on the structure of the film. In conclusion, materials science has been expanded by addition of a natural, three-dimensional chitin film with utilizable properties.
市售的壳聚糖或壳聚糖分离物通常为粉末状，微观结构呈纳米纤维状。然而，昆虫体内天然壳聚糖的表面特性目前研究较少。在此，我们成功地从家蚕蛹的生物废料中制备了天然壳聚糖薄膜。观察到了壳聚糖薄膜的两种不同表面形态。我们首次报道了在薄膜的背面观察到的壳聚糖的微乳头状表面结构。为了进一步开发这种具有微乳头状结构的天然壳聚糖在传感应用中的潜力，我们开发了一种使用热蒸发法生成 Ag 纳米薄膜的方案。沉积 Ag 的天然壳聚糖薄膜表现出一定程度的表面增强拉曼散射（SERS）活性，这取决于薄膜的结构。总之，通过添加具有可用特性的天然三维壳聚糖薄膜，扩展了材料科学的研究领域。
