Journal
MATERIALS LETTERS
Volume 168, Issue -, Pages 31-35Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2016.01.026
Keywords
Silver; Nanoparticles; Skim latex; Natural rubber; Green synthesis
Funding
- National Research Council of Thailand (NRCT)
- Thammasat University [016/2558]
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Silver nanoparticles (AgNPs) were synthesized in low cost skim natural rubber latex by adding silver nitrate as a source of silver ions. Left-over ammonia in latex was believed to form a complex with silver ions before reacting with the reducing agents which were glucose and other organic compounds in latex. Moreover, protein in latex could also control the growth of the particles by acting as a stabilizing agent. Many factors, which include ammonia content, D-glucose content and BSA protein content, were studied to clarify their effects in the synthesis. The emergence of AgNPs was checked with UV-visible spectrometer and electrical conductivity meter. Transmission electron microscope (TEM) was applied to study the particle morphology. The results showed that UV absorbance (ABS) and conductivity of the reacting suspension increased when ammonia content and D-glucose content increased, implying an increasing number or growth of particles. In contrast, ABS and conductivity decreased with increasing BSA content, showing that smaller particles were formed. The TEM images confirmed that the size of AgNPs in the none-added sample was 6-26 nm. The synthesized AgNPs could inhibit the growth of Escherichia coll. and Staphylococcus aureus. (C) 2016 Elsevier B.V. All rights reserved.
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