Synthesis of Cotton Fibers Impregnated with Bactericidal Hydrotalcites to be used in Medical Textile Supplies

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MRS Advances © 2017 Materials Research Society DOI: 10.1557/adv.2017.598

Synthesis of Cotton Fibers Impregnated with Bactericidal Hydrotalcites to be used in Medical Textile Supplies Ana María León-Vallejo1*, Geolar Fetter1, Álvaro Sampieri2, Efraín Rubio-Rosas3 1

Benemérita Universidad Autónoma de Puebla, Facultad de Ciencias Químicas, Av. San Claudio, Ciudad

Universitaria, 72570 Puebla, México. 2

Benemérita Universidad Autónoma de Puebla, Facultad de Ingeniería Química, Av. San Claudio,

Ciudad Universitaria, 72570 Puebla, México. 3

Benemérita Universidad Autónoma de Puebla, Centro Universitario de Vinculación y Transferencia de Tecnología. Av. San Claudio, Ciudad Universitaria, 72570 Puebla, México.

ABSTRACT

Hydrotalcites or layered double hydroxides are solids having laminar structures with remarkable basic properties. They can be synthesized with bactericidal metal ions incorporated into the structure. Both, basic species and metals can provide a high activity against microorganisms. Regarding this, it should be interesting to obtain a novel composite material consisting of cotton fibers impregnated with antimicrobial hydrotalcites to be used, for example, in medical textile supplies. In the present study, the retention of antimicrobial hydrotalcites in cotton fibers using mechanical mixing procedures was evaluated. The impregnation was carried out by three procedures, consisting in stirring the hydrotalcite with the cotton fibers in a rotatory or orbital system or in an ultrasonic apparatus. Composites were characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy. The retention of hydrotalcites in the fibers depended on the impregnation method. The composite obtained by the ultrasound procedure showed better retention.

INTRODUCTION A wide range of microorganisms coexists in natural balance between skin and textiles. Among microorganisms, nonpathogenic bacteria can grow rapidly and uncontrollably, causing hygienic problems such as bad smell or skin irritation. The use of antibacterial metallic nanoparticles such as silver has shown efficient antibacterial properties due to their large surface areas that provide a better contact with microorganisms [1]. Another kind of emergent bactericidal material can be a layered 3787

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double hydroxide or hydrotalcite, in which the metallic atoms can be slowly released from a framework, by dissolution in an acidic medium, to attack the microorganisms [2]. The basic species present in the hydrotalcite materials also contribute to the elimination of the bacteria [3, 4]. Hydrotalcites have a layered structure with a general formula: (1)

[(M2+)1−x(M3+)x

(OH)2](Xm-)x/m·

nH2O

Where M2+ is a divalent metal that may be replaced by a trivalent metal, M3+, which