Quantitative analysis of the binding strength and adsorption capacity of zinc oxide nanoparticles onto unmodified and modified cotton fiber

WCU Author/Contributor (non-WCU co-authors, if there are any, appear on document)
Stephen Robert Printz (Creator)
Western Carolina University (WCU )
Web Site: http://library.wcu.edu/
Carmen Huffman

Abstract: Risk of bacterial infection is always a concern in hospitals, so it is important to nd ways tominimize this risk. One method for reducing the risk of infection is by using textiles withantimicrobial properties. Zinc oxide nanoparticles have antimicrobial properties, and can beadsorbed onto cotton bers to pass these properties to the cloth. However, the binding ofthe zinc oxide nanoparticles to cotton is weak, so the particles desorb from the cloth afterrepeated washings. The goal of this project was to quantify the binding strength of zincoxide nanoparticles onto di erent types of cotton ber. The cotton was modi ed by graftingcyclodextrin onto it with citric acid as a crosslinking agent. Adsorption was tested withdesized, unbleached cotton print cloth; desized, bleached cotton print cloth; and desized,bleached, mercerized cotton print cloth. As expected, adsorption to unmodified cloth waspoor. Unbleached cloth had the highest adsorption capacity (Q0 = 22-4 mg ZnO=g cloth),and bleached cloth had the lowest adsorption capacity (Q0 = 17-4 mg ZnO=g cloth). Mer-cerized cloth had the lowest strength (b = 0:010-0:003 ppm??1), and bleached cloth had thehighest binding strength (b = 0:04-0:01 ppm??1). Modi cation with -cyclodextrin increasedadsorption capacity over unmodified cloth by 61, 80, and 70% for mercerized/bleached cloth,bleached cloth, and unbleached cloth, respectively, and increased b by 1601, 126, and 90% respectively. Modifcation with -cyclodextrin increased adsorption capacities by 80, 94, and 112%, respectively, and increased by 2027, 427, and 46%. As a result, -CD modifed un-bleached cloth had the highest adsorption capacity and one of the lowest binding strengths. However, -cyclodextrin modified mercerized cloth has both a high adsorption capacity anda high binding strength, and would likely be the best candidate for use in antimicrobialtextiles.

Additional Information

Language: English
Date: 2016
Adsorption, adsorption capacity, Binding strength, Cotton, Langmuir, Zinc Oxide nanoparticles
Zinc oxide -- Absorption and adsorption
Anti-infective agents
Fibers -- Therapeutic use

Email this document to