RPI ID: 2019-033-201, 2019-033-601
Innovation Summary: A coaxial wet-wet electrospinning process enables the creation of core-shell microfibers, where the core contains a phase-change material (PCM) like coconut oil and the shell is composed of cellulose. The fibers are extruded into an ethanol-water coagulation bath, forming a beaded morphology with PCM aggregates linked by cellulose. This structure allows for passive thermal regulation, maintaining ambient temperatures between 7°C and 22°C. The use of room temperature ionic liquids (RTILs) facilitates cellulose electrospinning, overcoming traditional solubility challenges.
Challenges / Opportunities: Conventional HVAC systems are energy-intensive and contribute significantly to carbon emissions. This fiber-based approach offers a passive, sustainable alternative for temperature control. The key technical challenge—cellulose’s insolubility—is addressed using RTILs, enabling scalable fiber production. Commercial opportunities include integration into textiles, insulation, and smart materials for industrial use.
Key Benefits / Advantages: ✔ Passive thermal regulation without electricity ✔ Sustainable and biodegradable materials ✔ Effective temperature control in the 7–22°C range ✔ Durable and flexible fiber structure ✔ Scalable electrospinning process ✔ Applicable to diverse product formats
Applications: • Wearable thermoregulating textiles • Building insulation (walls, ceilings) • Packaging materials • Smart fabrics for military or industrial use
Keywords: #Thermoregulation #Electrospinning #PhaseChangeMaterials #Cellulose #SustainableTextiles #CoreShellFibers
Intellectual Property: US 11,339,503 (Issued May 24, 2022) – protects the fiber product, securing rights to the core-shell structure and its thermoregulating performance. US 12,366,010 (Issued July 22, 2025) – protects the fabrication method, securing the scalable wet-wet electrospinning process using ionic liquids.