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A facile route based on ultrasound-assisted sol–gel method has been developed and applied to rapid synthesis of polyethylene glycol (PEG)/silicon dioxide (SiO 2 ) composite form-stable phase change materials (PCMs) without co-solvent and surfactant. This method was carried out under ultrasonic power of 300W using HCl and Na 2 CO 3 as the acidic and alkaline catalyst, respectively...
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