Phase Change Material (PCM) Nanocapsule Textile
topic
PCM nanocapsules (200–500 nm) encapsulate n-hexadecane or n-octadecane (Tm 18–28°C, latent heat 150–230 kJ/kg) in PMMA or melamine-formaldehyde shells via miniemulsion polymerization at 80°C, achieving 70–80% core content and heat storage of 80–150 kJ/kg composite. Applied to textiles at 20–60 g/m² via padding, nanocapsules are 5–10× smaller than conventional microcapsules (5–50 µm) enabling deeper fiber penetration and reduced stiffness impact. Thermal buffering effect delays skin temperature rise by 3–5°C for 15–25 min during moderate exercise (ISO 11092 dynamic method). Nanocapsule rupture resistance exceeds 50,000 flex cycles (versus 10,000 for 30 µm microcapsules) due to higher shell-to-diameter ratio. Wash durability of 40–60 cycles at 30°C with acrylic binder.
Role
Provides superior mechanical durability and deeper textile penetration versus conventional PCM microcapsules, enabling thermoregulatory performance in high-flex sportswear and work gloves where larger capsule formats fail under repeated mechanical stress.