Sharma Veerender, Ali S Wazed
Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016 India.
Cellulose (Lond). 2023;30(5):3317-3338. doi: 10.1007/s10570-023-05085-z. Epub 2023 Feb 13.
Vanillin is an active ingredient found in the crop 'vanilla' and is traditionally extracted from the 'vanilla pod'. Vanillin intrinsically is not a suitable candidate for imparting durable functional features into textile substate due to its smaller chemical structure which leads to leaching of the same during washing operation. To enlarge the structure, in the present study, vanillin has been converted into 4-(benzylamino) methyl))-2-methoxyphenol vanillin derivative (reduced Schiff base) with considerable amount of yield by using a simple one-step process and the synthesized product has been characterized by 1H, C13 NMR, FTIR, and Raman analysis. Thereafter, the reduced Schiff base of vanillin (RSB) has been integrated on cotton as well as polyethylene terephthalate (PET) fabric using high temperature high pressure (HT-HP) technique for imparting multiple functionalities. FESEM EDX analysis has confirmed the integration of RSB on both the fabrics by revealing uniform presence of the nitrogen (of the synthesized derivative) on the treated textile materials. Both types of functionalized textiles have demonstrated appealing color shades with an excellent antimicrobial activity of about 90% against () bacteria. The treated fabrics could cater pleasing fragrance and exhibit 90% antioxidant properties. Moreover, enlarged vanillin derivative in the form of RSB can retain its properties in the fabrics even after repeated machine launderings. RSB-treated cotton fabric has shown ultra-violet protection factor (UPF) of 38 which drops to 24 after washing whereas in case of PET treated fabric, the observed UPF values are 265 and 164 before and after washing, respectively. The RSB treatment has been found to be cytotoxically secure and biocompatible as tested on the PET fabric. Other required properties of the treated fabrics such as water absorbency, flexibility, etc. have also been found to be intact. Thus, the presented study reveals a new class of safe material that can be derived from eco-friendly vanillin and has the potential to replace hazardous chemicals that are currently used in textile chemical processing industries.
The online version contains supplementary material available at 10.1007/s10570-023-05085-z.
香草醛是作物“香草”中的一种活性成分，传统上是从“香草荚”中提取的。由于香草醛的化学结构较小，在洗涤过程中会导致其浸出，因此它本身并不适合赋予纺织基质持久的功能特性。为了扩大其结构，在本研究中，通过简单的一步法将香草醛转化为4-（苄基氨基）甲基）-2-甲氧基苯酚香草醛衍生物（还原席夫碱），产率可观，合成产物通过1H、C13 NMR、FTIR和拉曼分析进行了表征。此后，使用高温高压（HT-HP）技术将香草醛的还原席夫碱（RSB）整合到棉织物和聚对苯二甲酸乙二酯（PET）织物上，以赋予多种功能。FESEM EDX分析通过揭示处理过的纺织材料上氮（合成衍生物中的）的均匀存在，证实了RSB在两种织物上的整合。两种功能化纺织品都呈现出吸引人的色泽，对（）细菌具有约90%的优异抗菌活性。处理过的织物能散发出宜人的香味，并具有90%的抗氧化性能。此外，以RSB形式存在的扩大的香草醛衍生物即使在反复机洗后仍能在织物中保留其性能。RSB处理过的棉织物的紫外线防护系数（UPF）为38，洗涤后降至24，而对于PET处理过的织物，洗涤前后观察到的UPF值分别为265和164。经测试，RSB处理在PET织物上具有细胞毒性安全性和生物相容性。还发现处理过的织物的其他所需性能，如水吸收性、柔韧性等均保持完好。因此，本研究揭示了一种新型的安全材料，它可以从环保的香草醛中获得，并有可能取代目前纺织化学加工行业中使用的有害化学物质。
在线版本包含可在10.1007/s10570-023-05085-z获取的补充材料。
