A PHASE CHANGE MATERIAL AND A PROCESS FOR PREPARING THE SAME

The present invention relates to a phase change material comprising 40% to 70% w/w of polyethylene glycol, 30% to 60% w/w of lignin and at least one solvent. Further, a process for preparing a phase change material by blending polyethylene glycol, lignin and solvent under microwave conditions at 70?C and 100 W power and drying the blend to obtain the phase change material is provided. Further, the phase change material is polyethylene glycol (PEG)-lignin shape stabilized phase change material (SSPCM). The phase change material has a wide range of applications including solar energy storage, temperature-controlled greenhouses, smart buildings, thermo regulating textiles, shape memory polymer, transport of temperature-sensitive products, waste energy utilization, electronic device management and therapeutic packs.