Puthiyaveetil Yoosaf Mohammed Ajmal, Jayaprakash Anjana, Ghosh Somnath, Jaswal Vivek Sheel, Singh Kuldeep, Mandal Soumit, Shahid M, Yadav Munendra, Das Subhojit, Kumar Pankaj
Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati 517507 India
Department of Chemistry, Maharishi Markandeshwar University Mullana 133203 India.
RSC Adv. 2019 Aug 13;9(43):25184-25188. doi: 10.1039/c9ra04527a. eCollection 2019 Aug 8.
In this article, we report a simple method to synthesize biodegradable zein films functionalized with gold nanoparticles (AuNPs) with significantly improved mechanical properties, as an environmentally benign substitute to biologically hazardous polymers. Zein-coated AuNPs were synthesized using the zein protein as a reducing agent and characterized with IR, UV, CD, -potential, and TEM measurements. The zein protein interaction with the negatively charged surface of AuNPs provides excellent strength to the zein thin film. For the first time, FT-IR spectral studies suggested the strong interaction between AuNPs and zein protein, which was further supported by the higher binding constant ( ) value. The films were characterized for mechanical properties with spectroscopic and physical experimental investigations. The surface morphology of AuNP-doped zein film was explored by AFM and SEM, which suggested that the AuNPs prevent the buckling of zein film and increase the strength as well as flexibility of the film.
在本文中，我们报道了一种简单的方法来合成用金纳米颗粒（AuNPs）功能化的可生物降解玉米醇溶蛋白薄膜，其机械性能得到显著改善，可作为对生物有害聚合物的环境友好替代品。使用玉米醇溶蛋白作为还原剂合成了包覆玉米醇溶蛋白的金纳米颗粒，并通过红外光谱（IR）、紫外光谱（UV）、圆二色光谱（CD）、ζ电位和透射电子显微镜（TEM）测量对其进行了表征。玉米醇溶蛋白与带负电荷的金纳米颗粒表面的相互作用为玉米醇溶蛋白薄膜提供了优异的强度。首次通过傅里叶变换红外光谱（FT-IR）研究表明金纳米颗粒与玉米醇溶蛋白之间存在强相互作用，更高的结合常数（ ）值进一步支持了这一点。通过光谱和物理实验研究对薄膜的机械性能进行了表征。通过原子力显微镜（AFM）和扫描电子显微镜（SEM）探索了掺杂金纳米颗粒的玉米醇溶蛋白薄膜的表面形态，结果表明金纳米颗粒可防止玉米醇溶蛋白薄膜起皱，并提高薄膜的强度和柔韧性。
