https://orcid.org/0000-0001-9925-4884
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ABSTRACT
In this work, plasma pretreatment of raw cotton fibers combined with silver sorption was used for the preparation of antimicrobial fabrics. Special attention was given to the aging effect investigated seven days after plasma treatment. Raw cotton fabrics were modified with atmospheric pressure dielectric barrier discharge (DBD) in air, nitrogen, and oxygen. After plasma treatment, surface morphology and chemistry were characterized by atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS), respectively, molecular weight distribution and functional groups profile in cellulose were determined by GPC-MALLS with fluorescence labeling, while sorption properties were evaluated through wettability and moisture sorption measurements. Silver sorption was performed either immediately after treatment or seven days after plasma treatment, in order to investigate the aging effect on the sorption of Ag+. Antimicrobial activity was tested using agar diffusion test against S. aureus, E.coli, and C. albicans. Results have shown that silver sorption is improved and significantly higher when sorption is performed seven days after plasma treatment and consequently antimicrobial activity is also enhanced. This work confirms the significance of plasma aging in natural cellulose fibers’ functionalization which presents yet another variable that should be taken into account when planning the procedure for fibers functionalization.
摘要
采用等离子体预处理原棉纤维，结合银吸附技术制备抗菌织物. 特别注意血浆治疗7天后的老化效应. 采用常压介质阻挡放电（DBD）在空气、氮气和氧气中对原棉织物进行改性. 等离子体处理后，分别用原子力显微镜（AFM）和X射线光电子能谱（XPS）对纤维素的表面形貌和化学性质进行表征，用GPC-MALLS荧光标记法测定纤维素的分子量分布和官能团分布，同时通过润湿性和吸湿性的测量来评价吸附性能. 在处理后立即或在等离子体处理后7天进行银吸附，以研究老化对Ag+吸附的影响. 采用琼脂扩散法测定其抗菌活性. 金黄色葡萄球菌、大肠杆菌和大肠杆菌. 白色念珠菌. 结果表明，等离子体处理7天后进行银吸附时，银的吸附得到改善，并且显著提高，因此抗菌活性也得到增强. 这项工作证实了等离子体老化在天然纤维素纤维功能化过程中的重要性，提出了在规划纤维功能化过程时应考虑的另一个变量
Acknowledgments
Authors would like to thank Dr. Alenka Vesel from Jožef Stefan Institute in Ljubljana for XPS measurements, Dr. Ivan Belca from Faculty of Physics University of Belgrade for AFM measurements and Dr. Biljana Dojcinovic from the Institute of Chemistry, Technology and Metallurgy in Belgrade for ICP-OES analysis. This research was funded by the Ministry of Education, Science and Technological Development of the Republic of Serbia. (Contract No. 451-03-68/2020-14/200135)
Dr. Ana D. Kramar (ORCID 0000-0003-4208-943X) is a postdoctoral researcher at the Department of Textile Engineering, Faculty of Technology and Metallurgy, University of Belgrade. She received her PhD in 2015. by defending the thesis “Surface modification of cellulose fibers using dielectric barrier discharge.” She has been involved in several national and international projects of bilateral cooperation and also works as TA for several courses in fiber science at the Department of Textile Engineering. Dr. Kramar published 20 journal articles and more than 40 papers in conference proceedings.
Dr. Bratislav M. Obradović (ORCID 0000-0002-3221-7779) is a full proffesor at Faculty of Physics, University of Belgrade. He has been researching electric gas discharges at reduced and atmospheric pressure. A special part of his work is dedicated to various applications of gas discharges at atmospheric pressure. He is the author of a total of 85 papers in international journals (from the SCI list) with over 1800 citations, and more than 100 publications at the conferences. He was the manager of bilateral projects with Germany, Belarus and China.
Dr. Sonja Schiehser is a research assistant at the Institute of Chemistry of Renewable Resources, BOKU, Vienna. She has been involved in 9 projects, has 15 publications in SCI journals with 480 citations, and 1 chapter in a book. Her area of expertise is cellulose analytics especially GPC-MALLS analytical technique.
Dr. Antje Potthast (0000-0003-1981-2271) has more than 20 years of experience in chemistry and analysis of lignocellulose. She received her PhD from TU Dresden Germany and after a postdoctoral stay at NC State University Raleigh, USA, did her habilitation in wood chemistry at BOKU University in Vienna. She is a full professor and head of the work group Biopolymer and Paper Analytics at Institute of Chemistry of Renewable Resources, Department of Chemistry, BOKU. She is awardee of international scientific honors, among them the Hayashi Jisuke International Cellulose Award. Dr. Potthast published more than 300 papers in SCI journals with over 6000 citations and holds several patents.
Dr. Milorad M. Kuraica (ORCID 0000-0001-8201-8500) graduated from the Faculty of Physics in Belgrade in 1986, received his master’s degree in 1992 and defended his doctoral dissertation in 1998 entitled “Development of new spectroscopic methods for the diagnosis of sludge discharge.” He is a full professor at the Faculty of Physics for the scientific field of Physics of Ionized Gases and Plasma. Dr. Kuraica published more than 90 publications in international journals with over 1700 citations.
Dr. Mirjana M. Kostić (ORCID 0000-0001-9925-4884) is a full professor at the Department of Textile Engineering, Faculty of Technology and Metallurgy, University of Belgrade, where she had completed all her studies, up to PhD. In 2003, 2004-2005 and 2010, she carried out her postdoctoral research works at the Department of Chemistry, University of Natural Resources and Life Sciences, Vienna. She has taught several undergraduate and graduate courses related to fiber chemistry and fiber processing. Her research focus is on fundamental and applied research in fiber chemistry and fiber physics with preferential research field of cellulosic fibers and textiles. Dr. Kostić published 98 SCI journal publications with over 1370 citations.