Development of eco-friendly & thermal energy storage textile coatings through cationic microencapsulation of coconut oil with 3-Chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC) and ethyl cellulose (EC)
摘要
As the need for sustainable and advanced textile solutions increases, developing eco-friendly materials has become important. Eco-friendly coatings that provide multifunctional benefits, such as thermal regulation and enhanced adhesion, are at the forefront of research in smart textiles. This study focuses on a naturally biodegradable shell made of ethyl cellulose, which eliminates these negative impacts while promoting green processing. Six different samples were prepared, varying in 3-Chloro-2-Hydroxypropyltrimethylammonium Chloride (CHPTAC) concentration and encapsulation time, to study their thermal and structural properties. Results from Scanning Electron Microscopy (SEM) confirmed that the microcapsules had smooth and uniform shapes, showing successful encapsulation. Zeta size analysis indicated that longer encapsulation times produced more consistent particle sizes. Zeta potential results showed a positive surface charge in high-CHPTAC samples (+ 31 to + 33 mV), improving attachment to textiles. Differential Scanning Calorimetry (DSC) showed that samples with lower CHPTAC concentrations (e.g., TC2/6 and TC4/6) had higher enthalpy values (51.16 J/g and 49.95 J/g), indicating they could store more heat energy. Thermogravimetric Analysis (TGA) revealed that while higher CHPTAC levels increased stability but also lowered the temperature at which the capsules started to degrade. Results suggest that these capsules have good heat storage capabilities alongside improved attachment to textile surfaces. This development can contribute to reducing environmental impact by replacing harmful synthetic cross-linkers and promoting biodegradable, non-toxic solutions.