Department of Biotechnology, Kalasalingam University, Anand Nagar, Krishnankoil, 626126, Tamilnadu, India.
Centre for Composite Materials, Department of Mechanical Engineering, International Research Centre, Kalasalingam University, Krishnankoil, 626126, Tamilnadu, India.
Int J Biol Macromol. 2017 Oct;103:1113-1120. doi: 10.1016/j.ijbiomac.2017.05.068. Epub 2017 May 18.
Microbial secreted polymers have high molecular weight due to the presence of repeated units of macromolecules. Some of the polymers are derived from natural resources, including marine and soil microorganisms. In nano-biotechnology people are using different biological agents in the preparation of metal nanoparticles. In this study, the microbial bioflocculant polymer was used as an agent in preparation of silver nanoparticles. The prepared nanoparticles were immobilized into the cellulose matrix. The presence of silver nanoparticles inside the cellulose matrix was confirmed by Scanning Electron Microscopic (SEM) and Transmission Electron Microscopic (TEM) analyses. The FTIR characterization studies revealed the presence of silver in the cellulose nanocomposites. The XRD analysis indicated the silver peak formation inside the silver nanocomposites. The thermal degradation studies of silver nanocomposites showed that at 450°C the residual weight was completely decreased. The antibacterial activity of silver nanocomposites was tested against E.Coli bacteria.
微生物分泌的聚合物由于存在大分子的重复单元而具有高分子量。一些聚合物来自自然资源，包括海洋和土壤微生物。在纳米生物技术中，人们在制备金属纳米粒子时使用不同的生物制剂。在这项研究中，微生物生物絮凝聚合物被用作制备银纳米粒子的试剂。制备的纳米粒子被固定到纤维素基质中。通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）分析证实了银纳米粒子存在于纤维素基质内部。FTIR 特性研究表明银存在于纤维素纳米复合材料中。XRD 分析表明银纳米复合材料内部形成了银峰。银纳米复合材料的热降解研究表明，在 450°C 时，残余重量完全下降。银纳米复合材料的抗菌活性测试了对大肠杆菌的抗菌活性。
