Influence of Potassium Permanganate Oxidation on Structure and Properties of Cotton

ABSTRACT

Cotton yarn was oxidized using the various concentrations and pH of potassium permanganate solutions, in order to investigate the influence of oxidation parameters on chemical, mechanical and sorption properties of cotton. The oxidation progress was monitored through weight loss, carbonyl and carboxyl group content, tensile strength, moisture sorption, crystallinity change, surface charge and morphology of modified samples. The carboxyl groups were introduced into the oxidized cotton up to 0.3 mmol·g⁻¹, while the weight loss was up to 5%. The oxidized samples, compared with untreated cotton, exhibited lower tensile strength, higher moisture sorption and surface roughness. Surface charge was evaluated through measurement of zeta potential at different pH of electrolyte, and the correlation was established between carboxyl group content and zeta values measured at neutral pH, which proved that zeta potential can be a valuable tool for characterizing changes in the structure of oxidized cellulose textile materials.

摘要

摘要采用不同浓度和pH值的高锰酸钾溶液对棉纱进行氧化，研究氧化参数对棉纱化学、机械和吸附性能的影响. 通过测定改性样品的失重、羰基和羧基含量、拉伸强度、吸湿、结晶度变化、表面电荷和形貌来监测氧化过程. 将羧基引入氧化棉中，其添加量可达0.3 mmol·g-1，减重可达5%. 氧化后的样品与未处理过的棉花相比，抗拉强度较低，吸湿性和表面粗糙度较高. 表面电荷均通过电动电势测量在不同pH值的电解质,以及羧基之间的相关性建立了内容和电动电势以中性pH值,证明电动电势可以是一个有价值的工具,用于描述氧化纤维素纺织原料结构的变化.

KEYWORDS:

• Cotton
• permanganate
• oxidation
• structure
• swelling
• zeta potential

圓键词:

• 棉花
• 高锰酸盐
• 氧化
• 结构
• 肿胀
• 电动电势

Acknowledgments

Authors are grateful to the Ministry of Education, Science and Technological development of the Republic of Serbia for financial support through project OI 172029.

Additional information

Funding

This work was supported by the Ministry of Education, Science and Technological Development [OI 172029].