Green synthesis of AuNPs for eco-friendly functionalization of cellulosic substrates

• Published in: Applied surface science Vol. 389; pp. 118 - 125
• Main Authors: Ibrahim, Nabil A., Eid, Basma M., Abdel-Aziz, Mohamed S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-12-2016
• Subjects: Cellulosic fabrics; Gold nanoparticles; Green synthesis; Plasma treatment; Surface modification and functionalization; Cellulosic fabrics; Green synthesis; Plasma treatment; Surface modification and functionalization; Gold nanoparticles
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2016.07.077

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•Green synthesis of Au-nanoparticles.•Surface modification of cellulosic fabrics using O2 – plasma.•Subsequent deposition of AuNPs, AuNPs/ZnONPs or AuNPs/TiO2NPs.•Cellulosic fabrics with durable functional properties.
In this research work, extracellular biosynthesis of gold nanoparticles (AuNPs) using marine bacterial isolates (Streptomyces sp.) as a reducing/capping/stabilizing bio-agent and chlolauric acid (HAuCl4) as a precursor has been investigated. Surface modification of cotton and viscose knitted fabrics using O2-plasma followed by subsequent treatment with bio-synthesized AuNPs alone and in combination with TiO2NPs or ZnONPs to impart new functional properties namely antibacterial and UV-blocking were studied. The results show that loading of nominated nanomaterials onto the activated fabric samples results in a significant improvement in antibacterial activity against both G+ve (S. aureus) and G−ve (E. coli) along with a remarkable enhancement in the UV-protection functionality of the treated fabrics. The highest antibacterial and anti-UV values were obtained when O2-plasma treated fabrics were loaded with AuNPs/ZnONPs combination, irrespective of the used substrate. The imparted functional properties demonstrated remarkable retention even after 15 washings.