Biofunctional wool using β-cyclodextrins as vehiculizer of citronella oil

Abstract

The use of biopolymers such as cyclodextrin in textiles for the development of biofunctional fabrics is an alternative for the development of eco-friendly textiles. Cyclodextrins can create covalent interactions with the chemical groups available in wool, allowing the sorption of active molecules that will be released, such as the citronella oil. Therefore, this work investigates the formation of cyclodextrin complex oil applied in wool and its release mechanism. The complexes obtained and the grafted fabric were characterized by TGA, DLS, FTIR-ATR and SEM. The release of citronella oil was also analyzed and mathematical adjustments were performed using the equation of Korsmeyer-Peppas to verify the release mechanism. The results have indicated the formation of the complex and its fixation by covalent bonding, according to the FTIR-ATR specter and the SEM, and these have shown an anomalous release profile. For this reason, the application of the complexes in wool fabrics has shown to be an option in the production of eco-friendly biofunctional materials for controlled release, allowing the oil properties to be used in textile matrices.

Nonthermal Plasma Treatment Improves Uniformity and Adherence of Cyclodextrin-Based Coatings on Hydrophobic Polymer Substrates

“…For example, on PP surgical textile implants, they could deliver antibiotics/drugs [19,24], or provide intrinsic resistance to protein/cell/bacterial attachment [32] to help mitigate complications related to inflammation, infection, and/or post-surgical tissue adhesion. On PP non-medical textiles, they could be used to improve fabric dyeability [30], for sustained and controlled release of insect repellent compounds [52][53][54] and fragrances [55][56][57], and for incorporating protectants against ultraviolet radiation [58,59] to which PP has known degradation susceptibility [60]. In PP water treatment filters/membranes, they could be useful as reusable adsorbents for scavenging of pollutants from water [27,61,62], and for limiting attachment and growth of biofouling microbial biofilms [32].…”

The Role of β-Cyclodextrin in the Textile Industry—Review

“…Bhaskara-Amrit et al [31] emphasize that CDs have a very important role in textile processing and innovation; their use provides immediate opportunities for the development of environmentally friendly products and eco-textiles, in addition to having great potential in various applications. Cyclodextrins can be applied in the areas of spinning [71], pretreatment [72], dyeing [62,68,73], finishing [44,[74][75][76][77][78], and dye removal [40,[79][80][81], with dyeing, finishing, and water treatment being the most applicable in the textile area registered so far. The molecules interact with each other as they are influenced by forces arising from the characteristics that are specific to each substance.…”

“…In the area of textile finishing, cyclodextrins can have many applications; they are able to absorb unpleasant odors, and act as an encapsulation agent for essential oils [38,76,78,112,113], vitamins [114], hormones [77] and biocides [6,115] in order to preserve compounds and/or control their release, as shown in Figure 4. The loading of active ingredients allows the incorporation of specific and desired functions into textile materials, which may act differently under particular uses, such as in medicine [116], cosmetics [117], and engineering [118].…”

“…The most common procedure in the application of cyclodextrin into textiles is esterification, which can be done using modified cyclodextrins ( Figure 5), or through a reaction using dimethylol urea [128], citric acid [111], BTCA [78,129], or other products.…”

“…For the esterification reaction to occur, both sodium hypophosphite and the cure are used as catalysts [38]. The same process can be performed on other fibers that have -OH groups, such as cellulose, silk, polyamide, and wool [78].…”