Green鈥揝ilver Nanoparticle-Decorated Multiwalled Carbon Nanotube: A Precursor for Fabrication of Multifunctional Biobased Sustainable Nanocomposites
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- 作者：Sujata Pramanik ; Jayanta Hazarika ; Ashok Kumar ; Lipika Aidew ; Alak K. Buragohain ; Niranjan Karak
- 刊名：ACS Sustainable Chemistry & Engineering
- 出版年：2014
- 出版时间：November 3, 2014
- 年：2014
- 卷：2
- 期：11
- 页码：2510-2518
- 全文大小：629K
- ISSN：2168-0485
文摘
The article highlights the ultrasonication-assisted and diethanol fatty amide of castor oil (DEFA)-mediated bioreduction of silver (Ag) acetate in the presence of multiwalled carbon nanotubes (MWCNT) by a facile and environmentally benign 鈥渟ingle-step one-pot approach鈥? DEFA was used to impart a 鈥済reen capping鈥?attribute to the Ag nanoparticles and noncovalent functionalization of MWCNT. Biobased sustainable hyperbranched poly(ester amide) (HBPEA) nanocomposites were prepared by an in situ technique using DEFA-functionalized 鈥淎g nanoparticles-decorated MWCNT鈥?(AgCNT) as one of the starting components. A FTIR spectroscopic tool helped to delve into the probable complexation mechanism of Ag ions with DEFA and their subsequent reduction to Ag nanoparticles. Ag nanoparticles so formed on the surface of the nanotubes in the nanocomposites ranged within a size window of 2鈥? nm. X-ray diffractogram indexed for (100), (110), and (111) facets of Ag nanoparticles along with the (002) plane of the nanotubes and the appearance of AgL尾 in electron dispersive X-ray spectrum validated the formation of Ag nanoparticles in the nanocomposites. The dose-dependent increment in the performance, particularly the tensile strength (9.5鈥?5.2 MPa), and antibacterial activity against both Gram positive and Gram negative bacterial strains with DEFA-functionalized AgCNT content in the nanocomposites were observed. The significant bactericidal activity, pronounced sheet resistance of 106 惟/sq, mechanical performance, and thermal stability up to 325 掳C of the nanocomposites labeled them as potent antibacterial and thermostable antistatic sustainable materials for different advanced applications including coatings, textiles, biomedical electronics, and so on.