Green fabrication of control-released, washable and non-adhesives aromatic-nanocapsules/cotton fabrics via electrostatic-adsorption/in-situ immobilization

Control-released aromatic-nanocapsules/cotton fabrics with good wash durability and long-lasting fragrance release capability have been fabricated without adhesives via electrostatic-adsorption and in-situ immobilization method. Quaternary ammonium cationic treatment provided the cotton fabrics with positive charge surface to adsorb negatively charged aromatic nanocapsules with the core material of lavender essence and the wall material of epichlorohydrin modified cyclodextrin uniformly and abundantly. Afterwards, in-situ immobilization endowed aromatic nanocapsules with capability of fast “growing” on the surface of the cationic cotton fibers evenly and firmly due to the mechanism of alkali solution inside-outside diffusion and penetration throughout fibers. The fragrance of the developed fabrics could be released continuously after being placed for 120 days. After five wash cycles, the maximal percentage of remaining essence still reached 91.19%, which was 4.7 times of the unimmobilized aromatic fabrics. In the process of preparation, the absence of adhesives reduces environmental pollution, and the aromatic nanocapsules solution is recyclable, which are conducive to industrial sustainability. Electrostatic-adsorption/in-situ immobilization provides a facile and green strategy for preparing nano-composite materials with potential applications in the field of aromatic medical care textiles, functional aromatic household, clothing products and advanced functional materials, etc.