A Unique Approach for Functionalization of Cotton Substrate with Sustainable Bio-based Vanillin for Multifunctional Effects

ABSTRACT

Exploration of novel bio-based materials for value addition of textile substrates is a desirable research trend. In this context, vanillin (4-hydroxy-3-methoxybenzaldehyde), a bio-based material (obtained from vanilla pod) having multifunctional properties, can be a well-suited candidate. In the present article, both the vanillin alone and vanillin–copper (vanillin-Cu) complexes have been incorporated into cotton textiles separately using a high temperature-high pressure (HT-HP) dyeing machine and the quantity of copper has successfully been optimized to demonstrate enhanced properties. The vanillin-treated fabric has shown very good all-round properties like ultraviolet protection factor (UPF), color value (K/S value), and antibacterial activity (AM) in the presence of copper salt. However, only vanillin itself has rendered as such no UPF value but demonstrated 70% antimicrobial activity against E. coli (Gram-negative) bacteria and during washing operation small molecules of vanillin get leached out of fabric (as represented by significant loss in properties). This is the first time that the functional properties of vanillin and vanillin-Cu complex have directly been explored on cotton textile wherein significantly enhanced properties have been achieved on vanillin-Cu complex-treated fabric (i.e. 99% AM, a good UPF factor of 78, K/S value of 11.55, and even 25% antioxidant activity).

摘要

探索新型生物基材料以增加纺织品基材的价值是一个理想的研究趋势. 在这种情况下，香草醛（4-羟基-3-甲氧基苯甲醛），一种具有多功能性质的生物基材料（从香草荚中获得），可以是非常合适的候选物. 在本文中，使用高温高压（HT-HP）染色机将单独的香草醛和香草醛-铜（香草醛铜）复合物分别掺入棉织物中，并成功地优化了铜的量，以证明其性能增强. 香兰素处理的织物在铜盐存在下表现出非常好的综合性能，如紫外线保护因子（UPF）、色值（K/S值）和抗菌活性（AM）. 然而，只有香兰素本身没有UPF值，但对大肠杆菌（革兰氏阴性）细菌具有约70%的抗菌活性，在洗涤过程中，小分子香兰素从织物中渗出（表现为性能的显著损失）. 这是第一次在棉织物上直接探索香草醛和香草醛铜络合物的功能特性，其中香草醛-铜络合体处理织物的性能得到显著提高（即约99%的AM，良好的UPF因子为78，K/S值为11.55，甚至25%的抗氧化活性）.

KEYWORDS:

• Vanillin
• copper
• cellulosic textiles
• antimicrobial
• Ultra-Violet protection (UPF)
• multifunctional

关键词:

• 香草醛
• 铜
• 纤维素纺织品
• 抗菌
• 紫外线防护
• 多功能

Disclosure statement

No potential conflict of interest was reported by the author(s).

Supplemental data

Supplemental data for this article can be accessed online at https://doi.org/10.1080/15440478.2022.2117258

Additional information

Funding

The work was supported by the Department of Science and Technology, Ministry of Science and Technology [File No. DST/TDT/SHRI-08/2018, under ‘Science an]